4093 lines
103 KiB
C++
4093 lines
103 KiB
C++
/* path.cc: path support.
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* This module's job is to
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- convert between POSIX and Win32 style filenames,
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- support the `mount' functionality,
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- support symlinks for files and directories
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Pathnames are handled as follows:
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- A \ or : in a path denotes a pure windows spec.
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- Paths beginning with // (or \\) are not translated (i.e. looked
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up in the mount table) and are assumed to be UNC path names.
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The goal in the above set of rules is to allow both POSIX and Win32
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flavors of pathnames without either interfering. The rules are
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intended to be as close to a superset of both as possible.
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Note that you can have more than one path to a file. The mount
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table is always prefered when translating Win32 paths to POSIX
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paths. Win32 paths in mount table entries may be UNC paths or
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standard Win32 paths starting with <drive-letter>:
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Text vs Binary issues are not considered here in path style
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decisions, although the appropriate flags are retrieved and
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stored in various structures.
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Removing mounted filesystem support would simplify things greatly,
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but having it gives us a mechanism of treating disk that lives on a
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UNIX machine as having UNIX semantics [it allows one to edit a text
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file on that disk and not have cr's magically appear and perhaps
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break apps running on UNIX boxes]. It also useful to be able to
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layout a hierarchy without changing the underlying directories.
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The semantics of mounting file systems is not intended to precisely
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follow normal UNIX systems.
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Each DOS drive is defined to have a current directory. Supporting
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this would complicate things so for now things are defined so that
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c: means c:\.
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*/
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#include "winsup.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mount.h>
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#include <mntent.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <ctype.h>
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#include <winioctl.h>
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#include <wingdi.h>
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#include <winuser.h>
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#include <winnls.h>
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#include <winnetwk.h>
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#include <shlobj.h>
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#include <sys/cygwin.h>
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#include <cygwin/version.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "sync.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "shared_info.h"
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#include "registry.h"
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#include "cygtls.h"
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#include <assert.h>
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static int normalize_win32_path (const char *, char *, char *&);
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static void slashify (const char *, char *, int);
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static void backslashify (const char *, char *, int);
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struct symlink_info
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{
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char contents[CYG_MAX_PATH + 4];
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char *ext_here;
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int extn;
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unsigned pflags;
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DWORD fileattr;
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int is_symlink;
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bool ext_tacked_on;
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int error;
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bool case_clash;
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_major_t major;
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_minor_t minor;
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_mode_t mode;
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int check (char *path, const suffix_info *suffixes, unsigned opt);
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int set (char *path);
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bool parse_device (const char *);
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bool case_check (char *path);
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int check_sysfile (const char *path, HANDLE h);
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int check_shortcut (const char *path, HANDLE h);
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void set_error (int);
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};
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muto NO_COPY cwdstuff::cwd_lock;
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int pcheck_case = PCHECK_RELAXED; /* Determines the case check behaviour. */
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static const GUID GUID_shortcut
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= { 0x00021401L, 0, 0, 0xc0, 0, 0, 0, 0, 0, 0, 0x46 };
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enum {
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WSH_FLAG_IDLIST = 0x01, /* Contains an ITEMIDLIST. */
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WSH_FLAG_FILE = 0x02, /* Contains a file locator element. */
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WSH_FLAG_DESC = 0x04, /* Contains a description. */
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WSH_FLAG_RELPATH = 0x08, /* Contains a relative path. */
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WSH_FLAG_WD = 0x10, /* Contains a working dir. */
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WSH_FLAG_CMDLINE = 0x20, /* Contains command line args. */
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WSH_FLAG_ICON = 0x40 /* Contains a custom icon. */
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};
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struct win_shortcut_hdr
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{
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DWORD size; /* Header size in bytes. Must contain 0x4c. */
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GUID magic; /* GUID of shortcut files. */
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DWORD flags; /* Content flags. See above. */
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/* The next fields from attr to icon_no are always set to 0 in Cygwin
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and U/Win shortcuts. */
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DWORD attr; /* Target file attributes. */
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FILETIME ctime; /* These filetime items are never touched by the */
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FILETIME mtime; /* system, apparently. Values don't matter. */
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FILETIME atime;
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DWORD filesize; /* Target filesize. */
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DWORD icon_no; /* Icon number. */
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DWORD run; /* Values defined in winuser.h. Use SW_NORMAL. */
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DWORD hotkey; /* Hotkey value. Set to 0. */
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DWORD dummy[2]; /* Future extension probably. Always 0. */
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};
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/* Determine if path prefix matches current cygdrive */
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#define iscygdrive(path) \
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(path_prefix_p (mount_table->cygdrive, (path), mount_table->cygdrive_len))
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#define iscygdrive_device(path) \
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(isalpha (path[mount_table->cygdrive_len]) && \
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(path[mount_table->cygdrive_len + 1] == '/' || \
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!path[mount_table->cygdrive_len + 1]))
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#define isproc(path) \
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(path_prefix_p (proc, (path), proc_len))
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#define isvirtual_dev(devn) \
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(devn == FH_CYGDRIVE || devn == FH_PROC || devn == FH_REGISTRY \
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|| devn == FH_PROCESS || devn == FH_NETDRIVE )
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/* Return non-zero if PATH1 is a prefix of PATH2.
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Both are assumed to be of the same path style and / vs \ usage.
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Neither may be "".
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LEN1 = strlen (PATH1). It's passed because often it's already known.
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Examples:
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/foo/ is a prefix of /foo <-- may seem odd, but desired
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/foo is a prefix of /foo/
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/ is a prefix of /foo/bar
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/ is not a prefix of foo/bar
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foo/ is a prefix foo/bar
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/foo is not a prefix of /foobar
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*/
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int
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path_prefix_p (const char *path1, const char *path2, int len1)
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{
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/* Handle case where PATH1 has trailing '/' and when it doesn't. */
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if (len1 > 0 && isdirsep (path1[len1 - 1]))
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len1--;
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if (len1 == 0)
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return isdirsep (path2[0]) && !isdirsep (path2[1]);
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if (isdirsep (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':')
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return pathnmatch (path1, path2, len1);
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return 0;
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}
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/* Return non-zero if paths match in first len chars.
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Check is dependent of the case sensitivity setting. */
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int
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pathnmatch (const char *path1, const char *path2, int len)
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{
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return pcheck_case == PCHECK_STRICT ? !strncmp (path1, path2, len)
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: strncasematch (path1, path2, len);
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}
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/* Return non-zero if paths match. Check is dependent of the case
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sensitivity setting. */
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int
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pathmatch (const char *path1, const char *path2)
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{
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return pcheck_case == PCHECK_STRICT ? !strcmp (path1, path2)
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: strcasematch (path1, path2);
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}
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#define isslash(c) ((c) == '/')
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/* Normalize a POSIX path.
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All duplicate /'s, except for 2 leading /'s, are deleted.
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The result is 0 for success, or an errno error value. */
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static int
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normalize_posix_path (const char *src, char *dst, char *&tail)
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{
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const char *in_src = src;
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syscall_printf ("src %s", src);
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if (isdrive (src) || *src == '\\')
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goto win32_path;
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tail = dst;
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if (!isslash (src[0]))
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{
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if (!cygheap->cwd.get (dst))
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return get_errno ();
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tail = strchr (tail, '\0');
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if (*src == '.')
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{
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if (tail == dst + 1 && *dst == '/')
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tail--;
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goto sawdot;
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}
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if (tail > dst && !isslash (tail[-1]))
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*tail++ = '/';
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}
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/* Two leading /'s? If so, preserve them. */
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else if (isslash (src[1]) && !isslash (src[2]))
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*tail++ = *src++;
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while (*src)
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{
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if (*src == '\\')
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goto win32_path;
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/* Strip runs of /'s. */
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if (!isslash (*src))
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*tail++ = *src++;
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else
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{
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while (*++src)
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{
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if (isslash (*src))
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continue;
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if (*src != '.')
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break;
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sawdot:
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if (src[1] != '.')
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{
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if (!src[1])
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{
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*tail++ = '/';
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goto done;
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}
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if (!isslash (src[1]))
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break;
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}
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else if (src[2] && !isslash (src[2]))
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break;
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else
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{
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while (tail > dst && !isslash (*--tail))
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continue;
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src++;
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}
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}
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*tail++ = '/';
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}
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if ((tail - dst) >= CYG_MAX_PATH)
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{
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debug_printf ("ENAMETOOLONG = normalize_posix_path (%s)", src);
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return ENAMETOOLONG;
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}
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}
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done:
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*tail = '\0';
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debug_printf ("%s = normalize_posix_path (%s)", dst, in_src);
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return 0;
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win32_path:
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int err = normalize_win32_path (in_src, dst, tail);
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if (!err)
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for (char *p = dst; (p = strchr (p, '\\')); p++)
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*p = '/';
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return err;
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}
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inline void
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path_conv::add_ext_from_sym (symlink_info &sym)
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{
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if (sym.ext_here && *sym.ext_here)
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{
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known_suffix = path + sym.extn;
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if (sym.ext_tacked_on)
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strcpy (known_suffix, sym.ext_here);
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}
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}
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static void __stdcall mkrelpath (char *dst) __attribute__ ((regparm (2)));
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static void __stdcall
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mkrelpath (char *path)
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{
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char cwd_win32[CYG_MAX_PATH];
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if (!cygheap->cwd.get (cwd_win32, 0))
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return;
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unsigned cwdlen = strlen (cwd_win32);
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if (!path_prefix_p (cwd_win32, path, cwdlen))
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return;
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size_t n = strlen (path);
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if (n < cwdlen)
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return;
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char *tail = path;
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if (n == cwdlen)
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tail += cwdlen;
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else
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tail += isdirsep (cwd_win32[cwdlen - 1]) ? cwdlen : cwdlen + 1;
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memmove (path, tail, strlen (tail) + 1);
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if (!*path)
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strcpy (path, ".");
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}
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#define MAX_FS_INFO_CNT 25
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fs_info fsinfo[MAX_FS_INFO_CNT];
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LONG fsinfo_cnt;
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bool
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fs_info::update (const char *win32_path)
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{
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char fsname [CYG_MAX_PATH];
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char root_dir [CYG_MAX_PATH];
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bool ret;
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if (!rootdir (win32_path, root_dir))
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{
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debug_printf ("Cannot get root component of path %s", win32_path);
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clear ();
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return false;
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}
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__ino64_t tmp_name_hash = hash_path_name (1, root_dir);
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if (tmp_name_hash == name_hash)
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return true;
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int idx = 0;
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LONG cur_fsinfo_cnt = fsinfo_cnt;
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while (idx < cur_fsinfo_cnt && fsinfo[idx].name_hash)
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{
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if (tmp_name_hash == fsinfo[idx].name_hash)
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{
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*this = fsinfo[idx];
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return true;
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}
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++idx;
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}
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name_hash = tmp_name_hash;
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/* I have no idea why, but some machines require SeChangeNotifyPrivilege
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to access volume information. */
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push_thread_privilege (SE_CHANGE_NOTIFY_PRIV, true);
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drive_type (GetDriveType (root_dir));
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if (drive_type () == DRIVE_REMOTE
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|| (drive_type () == DRIVE_UNKNOWN
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&& (root_dir[0] == '\\' && root_dir[1] == '\\')))
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is_remote_drive (true);
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else
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is_remote_drive (false);
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ret = GetVolumeInformation (root_dir, NULL, 0, &status.serial, NULL,
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&status.flags, fsname, sizeof (fsname));
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pop_thread_privilege ();
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if (!ret && !is_remote_drive ())
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{
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debug_printf ("Cannot get volume information (%s), %E", root_dir);
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has_buggy_open (false);
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has_ea (false);
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flags () = serial () = 0;
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return false;
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}
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/* FIXME: Samba by default returns "NTFS" in file system name, but
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* doesn't support Extended Attributes. If there's some fast way to
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* distinguish between samba and real ntfs, it should be implemented
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* here.
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*/
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has_ea (!is_remote_drive () && strcmp (fsname, "NTFS") == 0);
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has_acls ((flags () & FS_PERSISTENT_ACLS)
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&& (allow_smbntsec || !is_remote_drive ()));
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is_fat (strncasematch (fsname, "FAT", 3));
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/* Known file systems with buggy open calls. Further explanation
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in fhandler.cc (fhandler_disk_file::open). */
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has_buggy_open (!strcmp (fsname, "SUNWNFS"));
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|
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/* Only append non-removable drives to the global fsinfo storage */
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if (drive_type () != DRIVE_REMOVABLE && drive_type () != DRIVE_CDROM
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&& idx < MAX_FS_INFO_CNT)
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{
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LONG exc_cnt;
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while ((exc_cnt = InterlockedExchange (&fsinfo_cnt, -1)) == -1)
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low_priority_sleep (0);
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if (exc_cnt < MAX_FS_INFO_CNT)
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{
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/* Check if another thread has already appended that very drive */
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while (idx < exc_cnt)
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{
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if (fsinfo[idx++].name_hash == name_hash)
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goto done;
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}
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fsinfo[exc_cnt++] = *this;
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}
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done:
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InterlockedExchange (&fsinfo_cnt, exc_cnt);
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}
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return true;
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}
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void
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path_conv::fillin (HANDLE h)
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{
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BY_HANDLE_FILE_INFORMATION local;
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if (!GetFileInformationByHandle (h, &local))
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{
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fileattr = INVALID_FILE_ATTRIBUTES;
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fs.serial () = 0;
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}
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else
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{
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fileattr = local.dwFileAttributes;
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fs.serial () = local.dwVolumeSerialNumber;
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}
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fs.drive_type (DRIVE_UNKNOWN);
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}
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|
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void
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path_conv::set_normalized_path (const char *path_copy, bool strip_tail)
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{
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char *p = strchr (path_copy, '\0');
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|
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if (strip_tail)
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{
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while (*--p == '.' || *p == ' ')
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continue;
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*++p = '\0';
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}
|
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size_t n = 1 + p - path_copy;
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normalized_path = path + sizeof (path) - n;
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char *eopath = strchr (path, '\0');
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if (normalized_path > eopath)
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normalized_path_size = n;
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else
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{
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normalized_path = (char *) cmalloc (HEAP_STR, n);
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normalized_path_size = 0;
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}
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|
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memcpy (normalized_path, path_copy, n);
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}
|
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|
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PUNICODE_STRING
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path_conv::get_nt_native_path (UNICODE_STRING &upath)
|
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{
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if (path[0] != '\\') /* X:\... or NUL, etc. */
|
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{
|
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str2uni_cat (upath, "\\??\\");
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str2uni_cat (upath, path);
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}
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else if (path[1] != '\\') /* \Device\... */
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str2uni_cat (upath, path);
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else if (path[2] != '.'
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|| path[3] != '\\') /* \\server\share\... */
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{
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str2uni_cat (upath, "\\??\\UNC\\");
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str2uni_cat (upath, path + 2);
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}
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else /* \\.\device */
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{
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str2uni_cat (upath, "\\??\\");
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str2uni_cat (upath, path + 4);
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}
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return &upath;
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}
|
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|
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/* Convert an arbitrary path SRC to a pure Win32 path, suitable for
|
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passing to Win32 API routines.
|
|
|
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If an error occurs, `error' is set to the errno value.
|
|
Otherwise it is set to 0.
|
|
|
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follow_mode values:
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SYMLINK_FOLLOW - convert to PATH symlink points to
|
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SYMLINK_NOFOLLOW - convert to PATH of symlink itself
|
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SYMLINK_IGNORE - do not check PATH for symlinks
|
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SYMLINK_CONTENTS - just return symlink contents
|
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*/
|
|
|
|
void
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path_conv::check (const char *src, unsigned opt,
|
|
const suffix_info *suffixes)
|
|
{
|
|
/* This array is used when expanding symlinks. It is CYG_MAX_PATH * 2
|
|
in length so that we can hold the expanded symlink plus a
|
|
trailer. */
|
|
char path_copy[CYG_MAX_PATH + 3];
|
|
char tmp_buf[2 * CYG_MAX_PATH + 3];
|
|
symlink_info sym;
|
|
bool need_directory = 0;
|
|
bool saw_symlinks = 0;
|
|
bool is_relpath;
|
|
char *tail, *path_end;
|
|
|
|
#if 0
|
|
static path_conv last_path_conv;
|
|
static char last_src[CYG_MAX_PATH];
|
|
|
|
if (*last_src && strcmp (last_src, src) == 0)
|
|
{
|
|
*this = last_path_conv;
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
int loop = 0;
|
|
path_flags = 0;
|
|
known_suffix = NULL;
|
|
fileattr = INVALID_FILE_ATTRIBUTES;
|
|
case_clash = false;
|
|
memset (&dev, 0, sizeof (dev));
|
|
fs.clear ();
|
|
normalized_path = NULL;
|
|
|
|
if (!(opt & PC_NULLEMPTY))
|
|
error = 0;
|
|
else if ((error = check_null_empty_str (src)))
|
|
return;
|
|
/* This loop handles symlink expansion. */
|
|
for (;;)
|
|
{
|
|
MALLOC_CHECK;
|
|
assert (src);
|
|
|
|
is_relpath = !isabspath (src);
|
|
error = normalize_posix_path (src, path_copy, tail);
|
|
if (error)
|
|
return;
|
|
|
|
/* Detect if the user was looking for a directory. We have to strip the
|
|
trailing slash initially while trying to add extensions but take it
|
|
into account during processing */
|
|
if (tail > path_copy + 2 && isslash (tail[-1]))
|
|
{
|
|
need_directory = 1;
|
|
*--tail = '\0';
|
|
}
|
|
path_end = tail;
|
|
|
|
/* Scan path_copy from right to left looking either for a symlink
|
|
or an actual existing file. If an existing file is found, just
|
|
return. If a symlink is found, exit the for loop.
|
|
Also: be careful to preserve the errno returned from
|
|
symlink.check as the caller may need it. */
|
|
/* FIXME: Do we have to worry about multiple \'s here? */
|
|
int component = 0; // Number of translated components
|
|
sym.contents[0] = '\0';
|
|
|
|
int symlen = 0;
|
|
|
|
for (unsigned pflags_or = opt & PC_NO_ACCESS_CHECK; ; pflags_or = 0)
|
|
{
|
|
const suffix_info *suff;
|
|
char pathbuf[CYG_MAX_PATH];
|
|
char *full_path;
|
|
|
|
/* Don't allow symlink.check to set anything in the path_conv
|
|
class if we're working on an inner component of the path */
|
|
if (component)
|
|
{
|
|
suff = NULL;
|
|
sym.pflags = 0;
|
|
full_path = pathbuf;
|
|
}
|
|
else
|
|
{
|
|
suff = suffixes;
|
|
sym.pflags = path_flags;
|
|
full_path = this->path;
|
|
}
|
|
|
|
/* Convert to native path spec sans symbolic link info. */
|
|
error = mount_table->conv_to_win32_path (path_copy, full_path, dev,
|
|
&sym.pflags);
|
|
|
|
if (error)
|
|
return;
|
|
|
|
sym.pflags |= pflags_or;
|
|
|
|
if (dev.major == DEV_CYGDRIVE_MAJOR)
|
|
{
|
|
if (!component)
|
|
fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY;
|
|
else
|
|
{
|
|
dev.devn = FH_FS;
|
|
fileattr = GetFileAttributes (this->path);
|
|
}
|
|
goto out;
|
|
}
|
|
else if (isvirtual_dev (dev.devn))
|
|
{
|
|
/* FIXME: Calling build_fhandler here is not the right way to handle this. */
|
|
fhandler_virtual *fh = (fhandler_virtual *) build_fh_dev (dev, path_copy);
|
|
int file_type = fh->exists ();
|
|
if (file_type == -2)
|
|
{
|
|
fh->fill_filebuf ();
|
|
symlen = sym.set (fh->get_filebuf ());
|
|
}
|
|
delete fh;
|
|
switch (file_type)
|
|
{
|
|
case 1:
|
|
case 2:
|
|
if (component == 0)
|
|
fileattr = FILE_ATTRIBUTE_DIRECTORY;
|
|
break;
|
|
case -1:
|
|
if (component == 0)
|
|
fileattr = 0;
|
|
break;
|
|
case -2: /* /proc/self or /proc/<pid>/symlinks */
|
|
goto is_virtual_symlink;
|
|
case -3: /* /proc/<pid>/fd/pipe:[] */
|
|
if (component == 0)
|
|
{
|
|
fileattr = 0;
|
|
dev.parse (FH_PIPE);
|
|
}
|
|
break;
|
|
case -4: /* /proc/<pid>/fd/socket:[] */
|
|
if (component == 0)
|
|
{
|
|
fileattr = 0;
|
|
dev.parse (FH_TCP);
|
|
}
|
|
break;
|
|
default:
|
|
if (component == 0)
|
|
fileattr = INVALID_FILE_ATTRIBUTES;
|
|
goto virtual_component_retry;
|
|
}
|
|
path_flags |= PATH_RO;
|
|
goto out;
|
|
}
|
|
/* devn should not be a device. If it is, then stop parsing now. */
|
|
else if (dev.devn != FH_FS)
|
|
{
|
|
fileattr = 0;
|
|
path_flags = sym.pflags;
|
|
if (component)
|
|
{
|
|
error = ENOTDIR;
|
|
return;
|
|
}
|
|
goto out; /* Found a device. Stop parsing. */
|
|
}
|
|
|
|
/* If path is only a drivename, Windows interprets it as the
|
|
current working directory on this drive instead of the root
|
|
dir which is what we want. So we need the trailing backslash
|
|
in this case. */
|
|
if (full_path[0] && full_path[1] == ':' && full_path[2] == '\0')
|
|
{
|
|
full_path[2] = '\\';
|
|
full_path[3] = '\0';
|
|
}
|
|
|
|
symlen = sym.check (full_path, suff, opt | fs.has_ea ());
|
|
|
|
is_virtual_symlink:
|
|
|
|
if (sym.minor || sym.major)
|
|
{
|
|
dev.parse (sym.major, sym.minor);
|
|
dev.setfs (1);
|
|
dev.mode = sym.mode;
|
|
fileattr = sym.fileattr;
|
|
goto out;
|
|
}
|
|
|
|
if (sym.pflags & PATH_SOCKET)
|
|
{
|
|
if (component)
|
|
{
|
|
error = ENOTDIR;
|
|
return;
|
|
}
|
|
fileattr = sym.fileattr;
|
|
dev.parse (FH_UNIX);
|
|
dev.setfs (1);
|
|
goto out;
|
|
}
|
|
|
|
if (sym.case_clash)
|
|
{
|
|
if (pcheck_case == PCHECK_STRICT)
|
|
{
|
|
case_clash = true;
|
|
error = ENOENT;
|
|
goto out;
|
|
}
|
|
/* If pcheck_case==PCHECK_ADJUST the case_clash is remembered
|
|
if the last component is concerned. This allows functions
|
|
which shall create files to avoid overriding already existing
|
|
files with another case. */
|
|
if (!component)
|
|
case_clash = true;
|
|
}
|
|
if (!(opt & PC_SYM_IGNORE))
|
|
{
|
|
if (!component)
|
|
{
|
|
fileattr = sym.fileattr;
|
|
path_flags = sym.pflags;
|
|
}
|
|
|
|
/* If symlink.check found an existing non-symlink file, then
|
|
it sets the appropriate flag. It also sets any suffix found
|
|
into `ext_here'. */
|
|
if (!sym.is_symlink && sym.fileattr != INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
error = sym.error;
|
|
if (component == 0)
|
|
add_ext_from_sym (sym);
|
|
else if (!(sym.fileattr & FILE_ATTRIBUTE_DIRECTORY))
|
|
{
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
if (pcheck_case == PCHECK_RELAXED)
|
|
goto out; // file found
|
|
/* Avoid further symlink evaluation. Only case checks are
|
|
done now. */
|
|
opt |= PC_SYM_IGNORE;
|
|
}
|
|
/* Found a symlink if symlen > 0. If component == 0, then the
|
|
src path itself was a symlink. If !follow_mode then
|
|
we're done. Otherwise we have to insert the path found
|
|
into the full path that we are building and perform all of
|
|
these operations again on the newly derived path. */
|
|
else if (symlen > 0)
|
|
{
|
|
saw_symlinks = 1;
|
|
if (component == 0 && !need_directory && !(opt & PC_SYM_FOLLOW))
|
|
{
|
|
set_symlink (symlen); // last component of path is a symlink.
|
|
if (opt & PC_SYM_CONTENTS)
|
|
{
|
|
strcpy (path, sym.contents);
|
|
goto out;
|
|
}
|
|
add_ext_from_sym (sym);
|
|
if (pcheck_case == PCHECK_RELAXED)
|
|
goto out;
|
|
/* Avoid further symlink evaluation. Only case checks are
|
|
done now. */
|
|
opt |= PC_SYM_IGNORE;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
else if (sym.error && sym.error != ENOENT && sym.error != ENOSHARE)
|
|
{
|
|
error = sym.error;
|
|
goto out;
|
|
}
|
|
/* No existing file found. */
|
|
}
|
|
|
|
virtual_component_retry:
|
|
/* Find the new "tail" of the path, e.g. in '/for/bar/baz',
|
|
/baz is the tail. */
|
|
if (tail != path_end)
|
|
*tail = '/';
|
|
while (--tail > path_copy + 1 && *tail != '/') {}
|
|
/* Exit loop if there is no tail or we are at the
|
|
beginning of a UNC path */
|
|
if (tail <= path_copy + 1)
|
|
goto out; // all done
|
|
|
|
/* Haven't found an existing pathname component yet.
|
|
Pinch off the tail and try again. */
|
|
*tail = '\0';
|
|
component++;
|
|
}
|
|
|
|
/* Arrive here if above loop detected a symlink. */
|
|
if (++loop > MAX_LINK_DEPTH)
|
|
{
|
|
error = ELOOP; // Eep.
|
|
return;
|
|
}
|
|
|
|
MALLOC_CHECK;
|
|
|
|
|
|
/* Place the link content, possibly with head and/or tail, in tmp_buf */
|
|
|
|
char *headptr;
|
|
if (isabspath (sym.contents))
|
|
headptr = tmp_buf; /* absolute path */
|
|
else
|
|
{
|
|
/* Copy the first part of the path (with ending /) and point to the end. */
|
|
char *prevtail = tail;
|
|
while (--prevtail > path_copy && *prevtail != '/') {}
|
|
int headlen = prevtail - path_copy + 1;;
|
|
memcpy (tmp_buf, path_copy, headlen);
|
|
headptr = &tmp_buf[headlen];
|
|
}
|
|
|
|
/* Make sure there is enough space */
|
|
if (headptr + symlen >= tmp_buf + sizeof (tmp_buf))
|
|
{
|
|
too_long:
|
|
error = ENAMETOOLONG;
|
|
strcpy (path, "::ENAMETOOLONG::");
|
|
return;
|
|
}
|
|
|
|
/* Copy the symlink contents to the end of tmp_buf.
|
|
Convert slashes. */
|
|
for (char *p = sym.contents; *p; p++)
|
|
*headptr++ = *p == '\\' ? '/' : *p;
|
|
*headptr = '\0';
|
|
|
|
/* Copy any tail component (with the 0) */
|
|
if (tail++ < path_end)
|
|
{
|
|
/* Add a slash if needed. There is space. */
|
|
if (*(headptr - 1) != '/')
|
|
*headptr++ = '/';
|
|
int taillen = path_end - tail + 1;
|
|
if (headptr + taillen > tmp_buf + sizeof (tmp_buf))
|
|
goto too_long;
|
|
memcpy (headptr, tail, taillen);
|
|
}
|
|
|
|
/* Evaluate everything all over again. */
|
|
src = tmp_buf;
|
|
}
|
|
|
|
if (!(opt & PC_SYM_CONTENTS))
|
|
add_ext_from_sym (sym);
|
|
|
|
out:
|
|
bool strip_tail = false;
|
|
/* If the user wants a directory, do not return a symlink */
|
|
if ((opt & PC_WRITABLE) && (path_flags & PATH_RO))
|
|
{
|
|
debug_printf ("%s is on a read-only filesystem", path);
|
|
error = EROFS;
|
|
return;
|
|
}
|
|
else if (isvirtual_dev (dev.devn) && fileattr == INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
error = dev.devn == FH_NETDRIVE ? ENOSHARE : ENOENT;
|
|
return;
|
|
}
|
|
else if (!need_directory || error)
|
|
/* nothing to do */;
|
|
else if (fileattr & FILE_ATTRIBUTE_DIRECTORY)
|
|
path_flags &= ~PATH_SYMLINK;
|
|
else
|
|
{
|
|
debug_printf ("%s is a non-directory", path);
|
|
error = ENOTDIR;
|
|
return;
|
|
}
|
|
|
|
if (dev.isfs ())
|
|
{
|
|
if (strncmp (path, "\\\\.\\", 4))
|
|
{
|
|
/* Windows ignores trailing dots and spaces */
|
|
char *tail = NULL;
|
|
for (char *p = path; *p; p++)
|
|
if (*p != '.' && *p != ' ')
|
|
tail = NULL;
|
|
else if (p[1] == '\\')
|
|
{
|
|
error = ENOENT;
|
|
return;
|
|
}
|
|
else if (!tail)
|
|
tail = p;
|
|
|
|
if (!tail)
|
|
/* nothing */;
|
|
else if (tail[-1] != '\\')
|
|
{
|
|
*tail = '\0';
|
|
strip_tail = true;
|
|
}
|
|
else
|
|
{
|
|
error = ENOENT;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (fs.update (path))
|
|
{
|
|
debug_printf ("this->path(%s), has_acls(%d)", path, fs.has_acls ());
|
|
if (fs.has_acls () && allow_ntsec)
|
|
set_exec (0); /* We really don't know if this is executable or not here
|
|
but set it to not executable since it will be figured out
|
|
later by anything which cares about this. */
|
|
}
|
|
if (exec_state () != dont_know_if_executable)
|
|
/* ok */;
|
|
else if (isdir ())
|
|
set_exec (1);
|
|
else if (issymlink () || issocket ())
|
|
set_exec (0);
|
|
}
|
|
|
|
#if 0
|
|
if (issocket ())
|
|
devn = FH_SOCKET;
|
|
#endif
|
|
|
|
if (opt & PC_NOFULL)
|
|
{
|
|
if (is_relpath)
|
|
mkrelpath (this->path);
|
|
if (need_directory)
|
|
{
|
|
size_t n = strlen (this->path);
|
|
/* Do not add trailing \ to UNC device names like \\.\a: */
|
|
if (this->path[n - 1] != '\\' &&
|
|
(strncmp (this->path, "\\\\.\\", 4) != 0))
|
|
{
|
|
this->path[n] = '\\';
|
|
this->path[n + 1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
|
|
if (saw_symlinks)
|
|
set_has_symlinks ();
|
|
|
|
if (!error && !isdir () && !(path_flags & PATH_ALL_EXEC))
|
|
{
|
|
const char *p = strchr (path, '\0') - 4;
|
|
if (p >= path &&
|
|
(strcasematch (".exe", p) ||
|
|
strcasematch (".bat", p) ||
|
|
strcasematch (".com", p)))
|
|
path_flags |= PATH_EXEC;
|
|
}
|
|
|
|
if (!(opt & PC_POSIX))
|
|
normalized_path_size = 0;
|
|
else
|
|
{
|
|
if (tail < path_end && tail > path_copy + 1)
|
|
*tail = '/';
|
|
set_normalized_path (path_copy, strip_tail);
|
|
}
|
|
|
|
#if 0
|
|
if (!error)
|
|
{
|
|
last_path_conv = *this;
|
|
strcpy (last_src, src);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
path_conv::set_name (const char *win32, const char *posix)
|
|
{
|
|
if (!normalized_path_size && normalized_path)
|
|
cfree (normalized_path);
|
|
strcpy (path, win32);
|
|
set_normalized_path (posix, false);
|
|
}
|
|
|
|
path_conv::~path_conv ()
|
|
{
|
|
if (!normalized_path_size && normalized_path)
|
|
{
|
|
cfree (normalized_path);
|
|
normalized_path = NULL;
|
|
}
|
|
}
|
|
|
|
/* Return true if src_path is a valid, internally supported device name.
|
|
In that case, win32_path gets the corresponding NT device name and
|
|
dev is appropriately filled with device information. */
|
|
|
|
static bool
|
|
win32_device_name (const char *src_path, char *win32_path, device& dev)
|
|
{
|
|
dev.parse (src_path);
|
|
if (dev.devn == FH_FS)
|
|
return false;
|
|
strcpy (win32_path, dev.native);
|
|
return true;
|
|
}
|
|
|
|
/* is_unc_share: Return non-zero if PATH begins with //UNC/SHARE */
|
|
|
|
static bool __stdcall
|
|
is_unc_share (const char *path)
|
|
{
|
|
const char *p;
|
|
return (isdirsep (path[0])
|
|
&& isdirsep (path[1])
|
|
&& (isalnum (path[2]) || path[2] == '.')
|
|
&& ((p = strpbrk (path + 3, "\\/")) != NULL)
|
|
&& isalnum (p[1]));
|
|
}
|
|
|
|
/* Normalize a Win32 path.
|
|
/'s are converted to \'s in the process.
|
|
All duplicate \'s, except for 2 leading \'s, are deleted.
|
|
|
|
The result is 0 for success, or an errno error value.
|
|
FIXME: A lot of this should be mergeable with the POSIX critter. */
|
|
static int
|
|
normalize_win32_path (const char *src, char *dst, char *&tail)
|
|
{
|
|
const char *src_start = src;
|
|
bool beg_src_slash = isdirsep (src[0]);
|
|
|
|
tail = dst;
|
|
if (beg_src_slash && isdirsep (src[1]) && src[2])
|
|
{
|
|
*tail++ = '\\';
|
|
src++;
|
|
if (src[1] == '.' && isdirsep (src[2]))
|
|
{
|
|
*tail++ = '\\';
|
|
*tail++ = '.';
|
|
src += 2;
|
|
}
|
|
}
|
|
else if (!isdrive(src) && *src != '/')
|
|
{
|
|
if (beg_src_slash)
|
|
tail += cygheap->cwd.get_drive (dst);
|
|
else if (!cygheap->cwd.get (dst, 0))
|
|
return get_errno ();
|
|
else
|
|
{
|
|
tail = strchr (tail, '\0');
|
|
*tail++ = '\\';
|
|
}
|
|
}
|
|
|
|
while (*src)
|
|
{
|
|
/* Strip duplicate /'s. */
|
|
if (isdirsep (src[0]) && isdirsep (src[1]))
|
|
src++;
|
|
/* Ignore "./". */
|
|
else if (src[0] == '.' && isdirsep (src[1])
|
|
&& (src == src_start || isdirsep (src[-1])))
|
|
src += 2;
|
|
|
|
/* Backup if "..". */
|
|
else if (src[0] == '.' && src[1] == '.'
|
|
/* dst must be greater than dst_start */
|
|
&& tail[-1] == '\\')
|
|
{
|
|
if (!isdirsep (src[2]) && src[2] != '\0')
|
|
*tail++ = *src++;
|
|
else
|
|
{
|
|
/* Back up over /, but not if it's the first one. */
|
|
if (tail > dst + 1)
|
|
tail--;
|
|
/* Now back up to the next /. */
|
|
while (tail > dst + 1 && tail[-1] != '\\' && tail[-2] != ':')
|
|
tail--;
|
|
src += 2;
|
|
if (isdirsep (*src))
|
|
src++;
|
|
}
|
|
}
|
|
/* Otherwise, add char to result. */
|
|
else
|
|
{
|
|
if (*src == '/')
|
|
*tail++ = '\\';
|
|
else
|
|
*tail++ = *src;
|
|
src++;
|
|
}
|
|
if ((tail - dst) >= CYG_MAX_PATH)
|
|
return ENAMETOOLONG;
|
|
}
|
|
if (tail > dst + 1 && tail[-1] == '.' && tail[-2] == '\\')
|
|
tail--;
|
|
*tail = '\0';
|
|
debug_printf ("%s = normalize_win32_path (%s)", dst, src_start);
|
|
return 0;
|
|
}
|
|
|
|
/* Various utilities. */
|
|
|
|
/* slashify: Convert all back slashes in src path to forward slashes
|
|
in dst path. Add a trailing slash to dst when trailing_slash_p arg
|
|
is set to 1. */
|
|
|
|
static void
|
|
slashify (const char *src, char *dst, int trailing_slash_p)
|
|
{
|
|
const char *start = src;
|
|
|
|
while (*src)
|
|
{
|
|
if (*src == '\\')
|
|
*dst++ = '/';
|
|
else
|
|
*dst++ = *src;
|
|
++src;
|
|
}
|
|
if (trailing_slash_p
|
|
&& src > start
|
|
&& !isdirsep (src[-1]))
|
|
*dst++ = '/';
|
|
*dst++ = 0;
|
|
}
|
|
|
|
/* backslashify: Convert all forward slashes in src path to back slashes
|
|
in dst path. Add a trailing slash to dst when trailing_slash_p arg
|
|
is set to 1. */
|
|
|
|
static void
|
|
backslashify (const char *src, char *dst, int trailing_slash_p)
|
|
{
|
|
const char *start = src;
|
|
|
|
while (*src)
|
|
{
|
|
if (*src == '/')
|
|
*dst++ = '\\';
|
|
else
|
|
*dst++ = *src;
|
|
++src;
|
|
}
|
|
if (trailing_slash_p
|
|
&& src > start
|
|
&& !isdirsep (src[-1]))
|
|
*dst++ = '\\';
|
|
*dst++ = 0;
|
|
}
|
|
|
|
/* nofinalslash: Remove trailing / and \ from SRC (except for the
|
|
first one). It is ok for src == dst. */
|
|
|
|
void __stdcall
|
|
nofinalslash (const char *src, char *dst)
|
|
{
|
|
int len = strlen (src);
|
|
if (src != dst)
|
|
memcpy (dst, src, len + 1);
|
|
while (len > 1 && isdirsep (dst[--len]))
|
|
dst[len] = '\0';
|
|
}
|
|
|
|
/* conv_path_list: Convert a list of path names to/from Win32/POSIX. */
|
|
|
|
static int
|
|
conv_path_list (const char *src, char *dst, int to_posix)
|
|
{
|
|
char *s;
|
|
char *d = dst;
|
|
char src_delim = to_posix ? ';' : ':';
|
|
char dst_delim = to_posix ? ':' : ';';
|
|
int (*conv_fn) (const char *, char *) = (to_posix
|
|
? cygwin_conv_to_posix_path
|
|
: cygwin_conv_to_win32_path);
|
|
|
|
char *srcbuf = (char *) alloca (strlen (src) + 1);
|
|
|
|
for (;;)
|
|
{
|
|
s = strccpy (srcbuf, &src, src_delim);
|
|
int len = s - srcbuf;
|
|
if (len >= CYG_MAX_PATH)
|
|
return ENAMETOOLONG;
|
|
int err = (*conv_fn) (len ? srcbuf : ".", d);
|
|
if (err)
|
|
return err;
|
|
if (!*src++)
|
|
break;
|
|
d = strchr (d, '\0');
|
|
*d++ = dst_delim;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* init: Initialize the mount table. */
|
|
|
|
void
|
|
mount_info::init ()
|
|
{
|
|
nmounts = 0;
|
|
|
|
/* Fetch the mount table and cygdrive-related information from
|
|
the registry. */
|
|
from_registry ();
|
|
}
|
|
|
|
static void
|
|
set_flags (unsigned *flags, unsigned val)
|
|
{
|
|
*flags = val;
|
|
if (!(*flags & PATH_BINARY))
|
|
{
|
|
*flags |= PATH_TEXT;
|
|
debug_printf ("flags: text (%p)", *flags & (PATH_TEXT | PATH_BINARY));
|
|
}
|
|
else
|
|
{
|
|
*flags |= PATH_BINARY;
|
|
debug_printf ("flags: binary (%p)", *flags & (PATH_TEXT | PATH_BINARY));
|
|
}
|
|
}
|
|
|
|
static char dot_special_chars[] =
|
|
"."
|
|
"\001" "\002" "\003" "\004" "\005" "\006" "\007" "\010"
|
|
"\011" "\012" "\013" "\014" "\015" "\016" "\017" "\020"
|
|
"\021" "\022" "\023" "\024" "\025" "\026" "\027" "\030"
|
|
"\031" "\032" "\033" "\034" "\035" "\036" "\037"
|
|
":" "\\" "*" "?" "%"
|
|
"A" "B" "C" "D" "E" "F" "G" "H"
|
|
"I" "J" "K" "L" "M" "N" "O" "P"
|
|
"Q" "R" "S" "T" "U" "V" "W" "X"
|
|
"Y" "Z";
|
|
static char *special_chars = dot_special_chars + 1;
|
|
static char special_introducers[] =
|
|
"anpcl";
|
|
|
|
static char
|
|
special_char (const char *s, const char *valid_chars = special_chars)
|
|
{
|
|
if (*s != '%' || strlen (s) < 3)
|
|
return 0;
|
|
|
|
char *p;
|
|
char hex[] = {s[1], s[2], '\0'};
|
|
unsigned char c = strtoul (hex, &p, 16);
|
|
p = strechr (valid_chars, c);
|
|
return *p;
|
|
}
|
|
|
|
/* Determines if name is "special". Assumes that name is empty or "absolute" */
|
|
static int
|
|
special_name (const char *s, int inc = 1)
|
|
{
|
|
if (!*s)
|
|
return false;
|
|
|
|
s += inc;
|
|
|
|
if (strcmp (s, ".") == 0 || strcmp (s, "..") == 0)
|
|
return false;
|
|
|
|
int n;
|
|
const char *p = NULL;
|
|
if (strncasematch (s, "conin$", n = 5)
|
|
|| strncasematch (s, "conout$", n = 7)
|
|
|| strncasematch (s, "nul", n = 3)
|
|
|| strncasematch (s, "aux", 3)
|
|
|| strncasematch (s, "prn", 3)
|
|
|| strncasematch (s, "con", 3))
|
|
p = s + n;
|
|
else if (strncasematch (s, "com", 3) || strncasematch (s, "lpt", 3))
|
|
(void) strtoul (s + 3, (char **) &p, 10);
|
|
if (p && (*p == '\0' || *p == '.'))
|
|
return -1;
|
|
|
|
return (strchr (s, '\0')[-1] == '.')
|
|
|| (strpbrk (s, special_chars) && !strncasematch (s, "%2f", 3));
|
|
}
|
|
|
|
bool
|
|
fnunmunge (char *dst, const char *src)
|
|
{
|
|
bool converted = false;
|
|
char c;
|
|
|
|
if ((c = special_char (src, special_introducers)))
|
|
{
|
|
__small_sprintf (dst, "%c%s", c, src + 3);
|
|
if (special_name (dst, 0))
|
|
{
|
|
*dst++ = c;
|
|
src += 3;
|
|
}
|
|
}
|
|
|
|
while (*src)
|
|
if (!(c = special_char (src, dot_special_chars)))
|
|
*dst++ = *src++;
|
|
else
|
|
{
|
|
converted = true;
|
|
*dst++ = c;
|
|
src += 3;
|
|
}
|
|
|
|
*dst = *src;
|
|
return converted;
|
|
}
|
|
|
|
static bool
|
|
copy1 (char *&d, const char *&src, int& left)
|
|
{
|
|
left--;
|
|
if (left || !*src)
|
|
*d++ = *src++;
|
|
else
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
copyenc (char *&d, const char *&src, int& left)
|
|
{
|
|
char buf[16];
|
|
int n = __small_sprintf (buf, "%%%02x", (unsigned char) *src++);
|
|
left -= n;
|
|
if (left <= 0)
|
|
return true;
|
|
strcpy (d, buf);
|
|
d += n;
|
|
return false;
|
|
}
|
|
|
|
int
|
|
mount_item::fnmunge (char *dst, const char *src, int& left)
|
|
{
|
|
int name_type;
|
|
if (!(name_type = special_name (src)))
|
|
{
|
|
if ((int) strlen (src) >= left)
|
|
return ENAMETOOLONG;
|
|
else
|
|
strcpy (dst, src);
|
|
}
|
|
else
|
|
{
|
|
char *d = dst;
|
|
if (copy1 (d, src, left))
|
|
return ENAMETOOLONG;
|
|
if (name_type < 0 && copyenc (d, src, left))
|
|
return ENAMETOOLONG;
|
|
|
|
while (*src)
|
|
if (!strchr (special_chars, *src) || (*src == '%' && !special_char (src)))
|
|
{
|
|
if (copy1 (d, src, left))
|
|
return ENAMETOOLONG;
|
|
}
|
|
else if (copyenc (d, src, left))
|
|
return ENAMETOOLONG;
|
|
|
|
char dot[] = ".";
|
|
const char *p = dot;
|
|
if (*--d != '.')
|
|
d++;
|
|
else if (copyenc (d, p, left))
|
|
return ENAMETOOLONG;
|
|
|
|
*d = *src;
|
|
}
|
|
|
|
backslashify (dst, dst, 0);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mount_item::build_win32 (char *dst, const char *src, unsigned *outflags, unsigned chroot_pathlen)
|
|
{
|
|
int n, err = 0;
|
|
const char *real_native_path;
|
|
int real_posix_pathlen;
|
|
set_flags (outflags, (unsigned) flags);
|
|
if (!cygheap->root.exists () || posix_pathlen != 1 || posix_path[0] != '/')
|
|
{
|
|
n = native_pathlen;
|
|
real_native_path = native_path;
|
|
real_posix_pathlen = chroot_pathlen ?: posix_pathlen;
|
|
}
|
|
else
|
|
{
|
|
n = cygheap->root.native_length ();
|
|
real_native_path = cygheap->root.native_path ();
|
|
real_posix_pathlen = posix_pathlen;
|
|
}
|
|
memcpy (dst, real_native_path, n + 1);
|
|
const char *p = src + real_posix_pathlen;
|
|
if (*p == '/')
|
|
/* nothing */;
|
|
else if ((!(flags & MOUNT_ENC) && isdrive (dst) && !dst[2]) || *p)
|
|
dst[n++] = '\\';
|
|
if (!*p || !(flags & MOUNT_ENC))
|
|
{
|
|
if ((n + strlen (p)) >= CYG_MAX_PATH)
|
|
err = ENAMETOOLONG;
|
|
else
|
|
backslashify (p, dst + n, 0);
|
|
}
|
|
else
|
|
{
|
|
int left = CYG_MAX_PATH - n;
|
|
while (*p)
|
|
{
|
|
char slash = 0;
|
|
char *s = strchr (p + 1, '/');
|
|
if (s)
|
|
{
|
|
slash = *s;
|
|
*s = '\0';
|
|
}
|
|
err = fnmunge (dst += n, p, left);
|
|
if (!s || err)
|
|
break;
|
|
n = strlen (dst);
|
|
*s = slash;
|
|
p = s;
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/* conv_to_win32_path: Ensure src_path is a pure Win32 path and store
|
|
the result in win32_path.
|
|
|
|
If win32_path != NULL, the relative path, if possible to keep, is
|
|
stored in win32_path. If the relative path isn't possible to keep,
|
|
the full path is stored.
|
|
|
|
If full_win32_path != NULL, the full path is stored there.
|
|
|
|
The result is zero for success, or an errno value.
|
|
|
|
{,full_}win32_path must have sufficient space (i.e. CYG_MAX_PATH bytes). */
|
|
|
|
int
|
|
mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
|
|
unsigned *flags)
|
|
{
|
|
bool chroot_ok = !cygheap->root.exists ();
|
|
while (sys_mount_table_counter < cygwin_shared->sys_mount_table_counter)
|
|
{
|
|
int current = cygwin_shared->sys_mount_table_counter;
|
|
init ();
|
|
sys_mount_table_counter = current;
|
|
}
|
|
MALLOC_CHECK;
|
|
|
|
dev.devn = FH_FS;
|
|
|
|
*flags = 0;
|
|
debug_printf ("conv_to_win32_path (%s)", src_path);
|
|
|
|
int i, rc;
|
|
mount_item *mi = NULL; /* initialized to avoid compiler warning */
|
|
|
|
/* The path is already normalized, without ../../ stuff, we need to have this
|
|
so that we can move from one mounted directory to another with relative
|
|
stuff.
|
|
|
|
eg mounting c:/foo /foo
|
|
d:/bar /bar
|
|
|
|
cd /bar
|
|
ls ../foo
|
|
|
|
should look in c:/foo, not d:/foo.
|
|
|
|
converting normalizex UNIX path to a DOS-style path, looking up the
|
|
appropriate drive in the mount table. */
|
|
|
|
/* See if this is a cygwin "device" */
|
|
if (win32_device_name (src_path, dst, dev))
|
|
{
|
|
*flags = MOUNT_BINARY; /* FIXME: Is this a sensible default for devices? */
|
|
rc = 0;
|
|
goto out_no_chroot_check;
|
|
}
|
|
|
|
MALLOC_CHECK;
|
|
/* If the path is on a network drive, bypass the mount table.
|
|
If it's // or //MACHINE, use the netdrive device. */
|
|
if (src_path[1] == '/')
|
|
{
|
|
if (!strchr (src_path + 2, '/'))
|
|
{
|
|
dev = *netdrive_dev;
|
|
set_flags (flags, PATH_BINARY);
|
|
}
|
|
backslashify (src_path, dst, 0);
|
|
/* Go through chroot check */
|
|
goto out;
|
|
}
|
|
if (isproc (src_path))
|
|
{
|
|
dev = *proc_dev;
|
|
dev.devn = fhandler_proc::get_proc_fhandler (src_path);
|
|
if (dev.devn == FH_BAD)
|
|
return ENOENT;
|
|
set_flags (flags, PATH_BINARY);
|
|
strcpy (dst, src_path);
|
|
goto out;
|
|
}
|
|
/* Check if the cygdrive prefix was specified. If so, just strip
|
|
off the prefix and transform it into an MS-DOS path. */
|
|
else if (iscygdrive (src_path))
|
|
{
|
|
int n = mount_table->cygdrive_len - 1;
|
|
int unit;
|
|
|
|
if (!src_path[n])
|
|
{
|
|
unit = 0;
|
|
dst[0] = '\0';
|
|
if (mount_table->cygdrive_len > 1)
|
|
dev = *cygdrive_dev;
|
|
}
|
|
else if (cygdrive_win32_path (src_path, dst, unit))
|
|
{
|
|
set_flags (flags, (unsigned) cygdrive_flags);
|
|
goto out;
|
|
}
|
|
else if (mount_table->cygdrive_len > 1)
|
|
return ENOENT;
|
|
}
|
|
|
|
int chroot_pathlen;
|
|
chroot_pathlen = 0;
|
|
/* Check the mount table for prefix matches. */
|
|
for (i = 0; i < nmounts; i++)
|
|
{
|
|
const char *path;
|
|
int len;
|
|
|
|
mi = mount + posix_sorted[i];
|
|
if (!cygheap->root.exists ()
|
|
|| (mi->posix_pathlen == 1 && mi->posix_path[0] == '/'))
|
|
{
|
|
path = mi->posix_path;
|
|
len = mi->posix_pathlen;
|
|
}
|
|
else if (cygheap->root.posix_ok (mi->posix_path))
|
|
{
|
|
path = cygheap->root.unchroot (mi->posix_path);
|
|
chroot_pathlen = len = strlen (path);
|
|
}
|
|
else
|
|
{
|
|
chroot_pathlen = 0;
|
|
continue;
|
|
}
|
|
|
|
if (path_prefix_p (path, src_path, len))
|
|
break;
|
|
}
|
|
|
|
if (i < nmounts)
|
|
{
|
|
int err = mi->build_win32 (dst, src_path, flags, chroot_pathlen);
|
|
if (err)
|
|
return err;
|
|
chroot_ok = true;
|
|
}
|
|
else
|
|
{
|
|
int offset = 0;
|
|
if (src_path[1] != '/' && src_path[1] != ':')
|
|
offset = cygheap->cwd.get_drive (dst);
|
|
backslashify (src_path, dst + offset, 0);
|
|
}
|
|
out:
|
|
MALLOC_CHECK;
|
|
if (chroot_ok || cygheap->root.ischroot_native (dst))
|
|
rc = 0;
|
|
else
|
|
{
|
|
debug_printf ("attempt to access outside of chroot '%s - %s'",
|
|
cygheap->root.posix_path (), cygheap->root.native_path ());
|
|
rc = ENOENT;
|
|
}
|
|
|
|
out_no_chroot_check:
|
|
debug_printf ("src_path %s, dst %s, flags %p, rc %d", src_path, dst, *flags, rc);
|
|
return rc;
|
|
}
|
|
|
|
/* cygdrive_posix_path: Build POSIX path used as the
|
|
mount point for cygdrives created when there is no other way to
|
|
obtain a POSIX path from a Win32 one. */
|
|
|
|
void
|
|
mount_info::cygdrive_posix_path (const char *src, char *dst, int trailing_slash_p)
|
|
{
|
|
int len = cygdrive_len;
|
|
|
|
memcpy (dst, cygdrive, len + 1);
|
|
|
|
/* Now finish the path off with the drive letter to be used.
|
|
The cygdrive prefix always ends with a trailing slash so
|
|
the drive letter is added after the path. */
|
|
dst[len++] = cyg_tolower (src[0]);
|
|
if (!src[2] || (isdirsep (src[2]) && !src[3]))
|
|
dst[len++] = '\000';
|
|
else
|
|
{
|
|
int n;
|
|
dst[len++] = '/';
|
|
if (isdirsep (src[2]))
|
|
n = 3;
|
|
else
|
|
n = 2;
|
|
strcpy (dst + len, src + n);
|
|
}
|
|
slashify (dst, dst, trailing_slash_p);
|
|
}
|
|
|
|
int
|
|
mount_info::cygdrive_win32_path (const char *src, char *dst, int& unit)
|
|
{
|
|
int res;
|
|
const char *p = src + cygdrive_len;
|
|
if (!isalpha (*p) || (!isdirsep (p[1]) && p[1]))
|
|
{
|
|
unit = -1; /* FIXME: should be zero, maybe? */
|
|
dst[0] = '\0';
|
|
res = 0;
|
|
}
|
|
else
|
|
{
|
|
dst[0] = cyg_tolower (*p);
|
|
dst[1] = ':';
|
|
strcpy (dst + 2, p + 1);
|
|
backslashify (dst, dst, !dst[2]);
|
|
unit = dst[0];
|
|
res = 1;
|
|
}
|
|
debug_printf ("src '%s', dst '%s'", src, dst);
|
|
return res;
|
|
}
|
|
|
|
/* conv_to_posix_path: Ensure src_path is a POSIX path.
|
|
|
|
The result is zero for success, or an errno value.
|
|
posix_path must have sufficient space (i.e. CYG_MAX_PATH bytes).
|
|
If keep_rel_p is non-zero, relative paths stay that way. */
|
|
|
|
int
|
|
mount_info::conv_to_posix_path (const char *src_path, char *posix_path,
|
|
int keep_rel_p)
|
|
{
|
|
int src_path_len = strlen (src_path);
|
|
int relative_path_p = !isabspath (src_path);
|
|
int trailing_slash_p;
|
|
|
|
if (src_path_len <= 1)
|
|
trailing_slash_p = 0;
|
|
else
|
|
{
|
|
const char *lastchar = src_path + src_path_len - 1;
|
|
trailing_slash_p = isdirsep (*lastchar) && lastchar[-1] != ':';
|
|
}
|
|
|
|
debug_printf ("conv_to_posix_path (%s, %s, %s)", src_path,
|
|
keep_rel_p ? "keep-rel" : "no-keep-rel",
|
|
trailing_slash_p ? "add-slash" : "no-add-slash");
|
|
MALLOC_CHECK;
|
|
|
|
if (src_path_len >= CYG_MAX_PATH)
|
|
{
|
|
debug_printf ("ENAMETOOLONG");
|
|
return ENAMETOOLONG;
|
|
}
|
|
|
|
/* FIXME: For now, if the path is relative and it's supposed to stay
|
|
that way, skip mount table processing. */
|
|
|
|
if (keep_rel_p && relative_path_p)
|
|
{
|
|
slashify (src_path, posix_path, 0);
|
|
debug_printf ("%s = conv_to_posix_path (%s)", posix_path, src_path);
|
|
return 0;
|
|
}
|
|
|
|
char pathbuf[CYG_MAX_PATH];
|
|
char *tail;
|
|
int rc = normalize_win32_path (src_path, pathbuf, tail);
|
|
if (rc != 0)
|
|
{
|
|
debug_printf ("%d = conv_to_posix_path (%s)", rc, src_path);
|
|
return rc;
|
|
}
|
|
|
|
int pathbuflen = tail - pathbuf;
|
|
for (int i = 0; i < nmounts; ++i)
|
|
{
|
|
mount_item &mi = mount[native_sorted[i]];
|
|
if (!path_prefix_p (mi.native_path, pathbuf, mi.native_pathlen))
|
|
continue;
|
|
|
|
if (cygheap->root.exists () && !cygheap->root.posix_ok (mi.posix_path))
|
|
continue;
|
|
|
|
/* SRC_PATH is in the mount table. */
|
|
int nextchar;
|
|
const char *p = pathbuf + mi.native_pathlen;
|
|
|
|
if (!*p || !p[1])
|
|
nextchar = 0;
|
|
else if (isdirsep (*p))
|
|
nextchar = -1;
|
|
else
|
|
nextchar = 1;
|
|
|
|
int addslash = nextchar > 0 ? 1 : 0;
|
|
if ((mi.posix_pathlen + (pathbuflen - mi.native_pathlen) + addslash) >= CYG_MAX_PATH)
|
|
return ENAMETOOLONG;
|
|
strcpy (posix_path, mi.posix_path);
|
|
if (addslash)
|
|
strcat (posix_path, "/");
|
|
if (nextchar)
|
|
slashify (p,
|
|
posix_path + addslash + (mi.posix_pathlen == 1 ? 0 : mi.posix_pathlen),
|
|
trailing_slash_p);
|
|
|
|
if (cygheap->root.exists ())
|
|
{
|
|
const char *p = cygheap->root.unchroot (posix_path);
|
|
memmove (posix_path, p, strlen (p) + 1);
|
|
}
|
|
if (mi.flags & MOUNT_ENC)
|
|
{
|
|
char tmpbuf[CYG_MAX_PATH];
|
|
if (fnunmunge (tmpbuf, posix_path))
|
|
strcpy (posix_path, tmpbuf);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (!cygheap->root.exists ())
|
|
/* nothing */;
|
|
else if (!cygheap->root.ischroot_native (pathbuf))
|
|
return ENOENT;
|
|
else
|
|
{
|
|
const char *p = pathbuf + cygheap->root.native_length ();
|
|
if (*p)
|
|
slashify (p, posix_path, trailing_slash_p);
|
|
else
|
|
{
|
|
posix_path[0] = '/';
|
|
posix_path[1] = '\0';
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/* Not in the database. This should [theoretically] only happen if either
|
|
the path begins with //, or / isn't mounted, or the path has a drive
|
|
letter not covered by the mount table. If it's a relative path then the
|
|
caller must want an absolute path (otherwise we would have returned
|
|
above). So we always return an absolute path at this point. */
|
|
if (isdrive (pathbuf))
|
|
cygdrive_posix_path (pathbuf, posix_path, trailing_slash_p);
|
|
else
|
|
{
|
|
/* The use of src_path and not pathbuf here is intentional.
|
|
We couldn't translate the path, so just ensure no \'s are present. */
|
|
slashify (src_path, posix_path, trailing_slash_p);
|
|
}
|
|
|
|
out:
|
|
debug_printf ("%s = conv_to_posix_path (%s)", posix_path, src_path);
|
|
MALLOC_CHECK;
|
|
return 0;
|
|
}
|
|
|
|
/* Return flags associated with a mount point given the win32 path. */
|
|
|
|
unsigned
|
|
mount_info::set_flags_from_win32_path (const char *p)
|
|
{
|
|
for (int i = 0; i < nmounts; i++)
|
|
{
|
|
mount_item &mi = mount[native_sorted[i]];
|
|
if (path_prefix_p (mi.native_path, p, mi.native_pathlen))
|
|
return mi.flags;
|
|
}
|
|
return PATH_BINARY;
|
|
}
|
|
|
|
/* read_mounts: Given a specific regkey, read mounts from under its
|
|
key. */
|
|
|
|
void
|
|
mount_info::read_mounts (reg_key& r)
|
|
{
|
|
char posix_path[CYG_MAX_PATH];
|
|
HKEY key = r.get_key ();
|
|
DWORD i, posix_path_size;
|
|
int res;
|
|
|
|
/* Loop through subkeys */
|
|
/* FIXME: we would like to not check MAX_MOUNTS but the heap in the
|
|
shared area is currently statically allocated so we can't have an
|
|
arbitrarily large number of mounts. */
|
|
for (i = 0; ; i++)
|
|
{
|
|
char native_path[CYG_MAX_PATH];
|
|
int mount_flags;
|
|
|
|
posix_path_size = sizeof (posix_path);
|
|
/* FIXME: if maximum posix_path_size is 256, we're going to
|
|
run into problems if we ever try to store a mount point that's
|
|
over 256 but is under CYG_MAX_PATH. */
|
|
res = RegEnumKeyEx (key, i, posix_path, &posix_path_size, NULL,
|
|
NULL, NULL, NULL);
|
|
|
|
if (res == ERROR_NO_MORE_ITEMS)
|
|
break;
|
|
else if (res != ERROR_SUCCESS)
|
|
{
|
|
debug_printf ("RegEnumKeyEx failed, error %d!", res);
|
|
break;
|
|
}
|
|
|
|
/* Get a reg_key based on i. */
|
|
reg_key subkey = reg_key (key, KEY_READ, posix_path, NULL);
|
|
|
|
/* Fetch info from the subkey. */
|
|
subkey.get_string ("native", native_path, sizeof (native_path), "");
|
|
mount_flags = subkey.get_int ("flags", 0);
|
|
|
|
/* Add mount_item corresponding to registry mount point. */
|
|
res = mount_table->add_item (native_path, posix_path, mount_flags, false);
|
|
if (res && get_errno () == EMFILE)
|
|
break; /* The number of entries exceeds MAX_MOUNTS */
|
|
}
|
|
}
|
|
|
|
/* from_registry: Build the entire mount table from the registry. Also,
|
|
read in cygdrive-related information from its registry location. */
|
|
|
|
void
|
|
mount_info::from_registry ()
|
|
{
|
|
|
|
/* Retrieve cygdrive-related information. */
|
|
read_cygdrive_info_from_registry ();
|
|
|
|
nmounts = 0;
|
|
|
|
/* First read mounts from user's table.
|
|
Then read mounts from system-wide mount table while deimpersonated . */
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
if (i)
|
|
cygheap->user.deimpersonate ();
|
|
reg_key r (i, KEY_READ, CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
read_mounts (r);
|
|
if (i)
|
|
cygheap->user.reimpersonate ();
|
|
}
|
|
}
|
|
|
|
/* add_reg_mount: Add mount item to registry. Return zero on success,
|
|
non-zero on failure. */
|
|
/* FIXME: Need a mutex to avoid collisions with other tasks. */
|
|
|
|
int
|
|
mount_info::add_reg_mount (const char *native_path, const char *posix_path, unsigned mountflags)
|
|
{
|
|
int res;
|
|
|
|
/* Add the mount to the right registry location, depending on
|
|
whether MOUNT_SYSTEM is set in the mount flags. */
|
|
|
|
reg_key reg (mountflags & MOUNT_SYSTEM, KEY_ALL_ACCESS,
|
|
CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
|
|
/* Start by deleting existing mount if one exists. */
|
|
res = reg.kill (posix_path);
|
|
if (res != ERROR_SUCCESS && res != ERROR_FILE_NOT_FOUND)
|
|
{
|
|
err:
|
|
__seterrno_from_win_error (res);
|
|
return -1;
|
|
}
|
|
|
|
/* Create the new mount. */
|
|
reg_key subkey (reg.get_key (), KEY_ALL_ACCESS, posix_path, NULL);
|
|
|
|
res = subkey.set_string ("native", native_path);
|
|
if (res != ERROR_SUCCESS)
|
|
goto err;
|
|
res = subkey.set_int ("flags", mountflags);
|
|
|
|
if (mountflags & MOUNT_SYSTEM)
|
|
{
|
|
sys_mount_table_counter++;
|
|
cygwin_shared->sys_mount_table_counter++;
|
|
}
|
|
return 0; /* Success */
|
|
}
|
|
|
|
/* del_reg_mount: delete mount item from registry indicated in flags.
|
|
Return zero on success, non-zero on failure.*/
|
|
/* FIXME: Need a mutex to avoid collisions with other tasks. */
|
|
|
|
int
|
|
mount_info::del_reg_mount (const char * posix_path, unsigned flags)
|
|
{
|
|
int res;
|
|
|
|
reg_key reg (flags & MOUNT_SYSTEM, KEY_ALL_ACCESS,
|
|
CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
res = reg.kill (posix_path);
|
|
|
|
if (res != ERROR_SUCCESS)
|
|
{
|
|
__seterrno_from_win_error (res);
|
|
return -1;
|
|
}
|
|
|
|
if (flags & MOUNT_SYSTEM)
|
|
{
|
|
sys_mount_table_counter++;
|
|
cygwin_shared->sys_mount_table_counter++;
|
|
}
|
|
|
|
return 0; /* Success */
|
|
}
|
|
|
|
/* read_cygdrive_info_from_registry: Read the default prefix and flags
|
|
to use when creating cygdrives from the special user registry
|
|
location used to store cygdrive information. */
|
|
|
|
void
|
|
mount_info::read_cygdrive_info_from_registry ()
|
|
{
|
|
/* First read cygdrive from user's registry.
|
|
If failed, then read cygdrive from system-wide registry
|
|
while deimpersonated. */
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
if (i)
|
|
cygheap->user.deimpersonate ();
|
|
reg_key r (i, KEY_READ, CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
if (i)
|
|
cygheap->user.reimpersonate ();
|
|
|
|
if (r.get_string (CYGWIN_INFO_CYGDRIVE_PREFIX, cygdrive, sizeof (cygdrive),
|
|
CYGWIN_INFO_CYGDRIVE_DEFAULT_PREFIX) != ERROR_SUCCESS && i == 0)
|
|
continue;
|
|
|
|
/* Fetch user cygdrive_flags from registry; returns MOUNT_CYGDRIVE on error. */
|
|
cygdrive_flags = r.get_int (CYGWIN_INFO_CYGDRIVE_FLAGS,
|
|
MOUNT_CYGDRIVE | MOUNT_BINARY);
|
|
/* Sanitize */
|
|
if (i == 0)
|
|
cygdrive_flags &= ~MOUNT_SYSTEM;
|
|
else
|
|
cygdrive_flags |= MOUNT_SYSTEM;
|
|
slashify (cygdrive, cygdrive, 1);
|
|
cygdrive_len = strlen (cygdrive);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* write_cygdrive_info_to_registry: Write the default prefix and flags
|
|
to use when creating cygdrives to the special user registry
|
|
location used to store cygdrive information. */
|
|
|
|
int
|
|
mount_info::write_cygdrive_info_to_registry (const char *cygdrive_prefix, unsigned flags)
|
|
{
|
|
/* Verify cygdrive prefix starts with a forward slash and if there's
|
|
another character, it's not a slash. */
|
|
if ((cygdrive_prefix == NULL) || (*cygdrive_prefix == 0) ||
|
|
(!isslash (cygdrive_prefix[0])) ||
|
|
((cygdrive_prefix[1] != '\0') && (isslash (cygdrive_prefix[1]))))
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
char hold_cygdrive_prefix[strlen (cygdrive_prefix) + 1];
|
|
/* Ensure that there is never a final slash */
|
|
nofinalslash (cygdrive_prefix, hold_cygdrive_prefix);
|
|
|
|
reg_key r (flags & MOUNT_SYSTEM, KEY_ALL_ACCESS,
|
|
CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
int res;
|
|
res = r.set_string (CYGWIN_INFO_CYGDRIVE_PREFIX, hold_cygdrive_prefix);
|
|
if (res != ERROR_SUCCESS)
|
|
{
|
|
__seterrno_from_win_error (res);
|
|
return -1;
|
|
}
|
|
r.set_int (CYGWIN_INFO_CYGDRIVE_FLAGS, flags);
|
|
|
|
if (flags & MOUNT_SYSTEM)
|
|
sys_mount_table_counter = ++cygwin_shared->sys_mount_table_counter;
|
|
|
|
/* This also needs to go in the in-memory copy of "cygdrive", but only if
|
|
appropriate:
|
|
1. setting user path prefix, or
|
|
2. overwriting (a previous) system path prefix */
|
|
if (!(flags & MOUNT_SYSTEM) || (mount_table->cygdrive_flags & MOUNT_SYSTEM))
|
|
{
|
|
slashify (cygdrive_prefix, cygdrive, 1);
|
|
cygdrive_flags = flags;
|
|
cygdrive_len = strlen (cygdrive);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mount_info::remove_cygdrive_info_from_registry (const char *cygdrive_prefix, unsigned flags)
|
|
{
|
|
reg_key r (flags & MOUNT_SYSTEM, KEY_ALL_ACCESS,
|
|
CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME,
|
|
NULL);
|
|
|
|
/* Delete cygdrive prefix and flags. */
|
|
int res = r.killvalue (CYGWIN_INFO_CYGDRIVE_PREFIX);
|
|
int res2 = r.killvalue (CYGWIN_INFO_CYGDRIVE_FLAGS);
|
|
|
|
if (flags & MOUNT_SYSTEM)
|
|
sys_mount_table_counter = ++cygwin_shared->sys_mount_table_counter;
|
|
|
|
/* Reinitialize the cygdrive path prefix to reflect to removal from the
|
|
registry. */
|
|
read_cygdrive_info_from_registry ();
|
|
|
|
if (res == ERROR_SUCCESS)
|
|
res = res2;
|
|
if (res == ERROR_SUCCESS)
|
|
return 0;
|
|
|
|
__seterrno_from_win_error (res);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
mount_info::get_cygdrive_info (char *user, char *system, char* user_flags,
|
|
char* system_flags)
|
|
{
|
|
/* Get the user path prefix from HKEY_CURRENT_USER. */
|
|
reg_key r (false, KEY_READ, CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
int res = r.get_string (CYGWIN_INFO_CYGDRIVE_PREFIX, user, CYG_MAX_PATH, "");
|
|
|
|
/* Get the user flags, if appropriate */
|
|
if (res == ERROR_SUCCESS)
|
|
{
|
|
int flags = r.get_int (CYGWIN_INFO_CYGDRIVE_FLAGS, MOUNT_CYGDRIVE | MOUNT_BINARY);
|
|
strcpy (user_flags, (flags & MOUNT_BINARY) ? "binmode" : "textmode");
|
|
}
|
|
|
|
/* Get the system path prefix from HKEY_LOCAL_MACHINE. */
|
|
reg_key r2 (true, KEY_READ, CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME, NULL);
|
|
int res2 = r2.get_string (CYGWIN_INFO_CYGDRIVE_PREFIX, system, CYG_MAX_PATH, "");
|
|
|
|
/* Get the system flags, if appropriate */
|
|
if (res2 == ERROR_SUCCESS)
|
|
{
|
|
int flags = r2.get_int (CYGWIN_INFO_CYGDRIVE_FLAGS, MOUNT_CYGDRIVE | MOUNT_BINARY);
|
|
strcpy (system_flags, (flags & MOUNT_BINARY) ? "binmode" : "textmode");
|
|
}
|
|
|
|
return (res != ERROR_SUCCESS) ? res : res2;
|
|
}
|
|
|
|
static mount_item *mounts_for_sort;
|
|
|
|
/* sort_by_posix_name: qsort callback to sort the mount entries. Sort
|
|
user mounts ahead of system mounts to the same POSIX path. */
|
|
/* FIXME: should the user should be able to choose whether to
|
|
prefer user or system mounts??? */
|
|
static int
|
|
sort_by_posix_name (const void *a, const void *b)
|
|
{
|
|
mount_item *ap = mounts_for_sort + (*((int*) a));
|
|
mount_item *bp = mounts_for_sort + (*((int*) b));
|
|
|
|
/* Base weighting on longest posix path first so that the most
|
|
obvious path will be chosen. */
|
|
size_t alen = strlen (ap->posix_path);
|
|
size_t blen = strlen (bp->posix_path);
|
|
|
|
int res = blen - alen;
|
|
|
|
if (res)
|
|
return res; /* Path lengths differed */
|
|
|
|
/* The two paths were the same length, so just determine normal
|
|
lexical sorted order. */
|
|
res = strcmp (ap->posix_path, bp->posix_path);
|
|
|
|
if (res == 0)
|
|
{
|
|
/* need to select between user and system mount to same POSIX path */
|
|
if (!(bp->flags & MOUNT_SYSTEM)) /* user mount */
|
|
return 1;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/* sort_by_native_name: qsort callback to sort the mount entries. Sort
|
|
user mounts ahead of system mounts to the same POSIX path. */
|
|
/* FIXME: should the user should be able to choose whether to
|
|
prefer user or system mounts??? */
|
|
static int
|
|
sort_by_native_name (const void *a, const void *b)
|
|
{
|
|
mount_item *ap = mounts_for_sort + (*((int*) a));
|
|
mount_item *bp = mounts_for_sort + (*((int*) b));
|
|
|
|
/* Base weighting on longest win32 path first so that the most
|
|
obvious path will be chosen. */
|
|
size_t alen = strlen (ap->native_path);
|
|
size_t blen = strlen (bp->native_path);
|
|
|
|
int res = blen - alen;
|
|
|
|
if (res)
|
|
return res; /* Path lengths differed */
|
|
|
|
/* The two paths were the same length, so just determine normal
|
|
lexical sorted order. */
|
|
res = strcmp (ap->native_path, bp->native_path);
|
|
|
|
if (res == 0)
|
|
{
|
|
/* need to select between user and system mount to same POSIX path */
|
|
if (!(bp->flags & MOUNT_SYSTEM)) /* user mount */
|
|
return 1;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
void
|
|
mount_info::sort ()
|
|
{
|
|
for (int i = 0; i < nmounts; i++)
|
|
native_sorted[i] = posix_sorted[i] = i;
|
|
/* Sort them into reverse length order, otherwise we won't
|
|
be able to look for /foo in /. */
|
|
mounts_for_sort = mount; /* ouch. */
|
|
qsort (posix_sorted, nmounts, sizeof (posix_sorted[0]), sort_by_posix_name);
|
|
qsort (native_sorted, nmounts, sizeof (native_sorted[0]), sort_by_native_name);
|
|
}
|
|
|
|
/* Add an entry to the mount table.
|
|
Returns 0 on success, -1 on failure and errno is set.
|
|
|
|
This is where all argument validation is done. It may not make sense to
|
|
do this when called internally, but it's cleaner to keep it all here. */
|
|
|
|
int
|
|
mount_info::add_item (const char *native, const char *posix, unsigned mountflags, int reg_p)
|
|
{
|
|
char nativetmp[CYG_MAX_PATH];
|
|
char posixtmp[CYG_MAX_PATH];
|
|
char *nativetail, *posixtail, error[] = "error";
|
|
int nativeerr, posixerr;
|
|
|
|
/* Something's wrong if either path is NULL or empty, or if it's
|
|
not a UNC or absolute path. */
|
|
|
|
if (native == NULL || !isabspath (native) ||
|
|
!(is_unc_share (native) || isdrive (native)))
|
|
nativeerr = EINVAL;
|
|
else
|
|
nativeerr = normalize_win32_path (native, nativetmp, nativetail);
|
|
|
|
if (posix == NULL || !isabspath (posix) ||
|
|
is_unc_share (posix) || isdrive (posix))
|
|
posixerr = EINVAL;
|
|
else
|
|
posixerr = normalize_posix_path (posix, posixtmp, posixtail);
|
|
|
|
debug_printf ("%s[%s], %s[%s], %p",
|
|
native, nativeerr ? error : nativetmp,
|
|
posix, posixerr ? error : posixtmp, mountflags);
|
|
|
|
if (nativeerr || posixerr)
|
|
{
|
|
set_errno (nativeerr?:posixerr);
|
|
return -1;
|
|
}
|
|
|
|
/* Make sure both paths do not end in /. */
|
|
if (nativetail > nativetmp + 1 && nativetail[-1] == '\\')
|
|
nativetail[-1] = '\0';
|
|
if (posixtail > posixtmp + 1 && posixtail[-1] == '/')
|
|
posixtail[-1] = '\0';
|
|
|
|
/* Write over an existing mount item with the same POSIX path if
|
|
it exists and is from the same registry area. */
|
|
int i;
|
|
for (i = 0; i < nmounts; i++)
|
|
{
|
|
if (strcasematch (mount[i].posix_path, posixtmp) &&
|
|
(mount[i].flags & MOUNT_SYSTEM) == (mountflags & MOUNT_SYSTEM))
|
|
break;
|
|
}
|
|
|
|
if (i == nmounts && nmounts == MAX_MOUNTS)
|
|
{
|
|
set_errno (EMFILE);
|
|
return -1;
|
|
}
|
|
|
|
if (reg_p && add_reg_mount (nativetmp, posixtmp, mountflags))
|
|
return -1;
|
|
|
|
if (i == nmounts)
|
|
nmounts++;
|
|
mount[i].init (nativetmp, posixtmp, mountflags);
|
|
sort ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Delete a mount table entry where path is either a Win32 or POSIX
|
|
path. Since the mount table is really just a table of aliases,
|
|
deleting / is ok (although running without a slash mount is
|
|
strongly discouraged because some programs may run erratically
|
|
without one). If MOUNT_SYSTEM is set in flags, remove from system
|
|
registry, otherwise remove the user registry mount.
|
|
*/
|
|
|
|
int
|
|
mount_info::del_item (const char *path, unsigned flags, int reg_p)
|
|
{
|
|
char pathtmp[CYG_MAX_PATH];
|
|
int posix_path_p = false;
|
|
|
|
/* Something's wrong if path is NULL or empty. */
|
|
if (path == NULL || *path == 0 || !isabspath (path))
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
if (is_unc_share (path) || strpbrk (path, ":\\"))
|
|
backslashify (path, pathtmp, 0);
|
|
else
|
|
{
|
|
slashify (path, pathtmp, 0);
|
|
posix_path_p = true;
|
|
}
|
|
nofinalslash (pathtmp, pathtmp);
|
|
|
|
if (reg_p && posix_path_p &&
|
|
del_reg_mount (pathtmp, flags) &&
|
|
del_reg_mount (path, flags)) /* for old irregular entries */
|
|
return -1;
|
|
|
|
for (int i = 0; i < nmounts; i++)
|
|
{
|
|
int ent = native_sorted[i]; /* in the same order as getmntent() */
|
|
if (((posix_path_p)
|
|
? strcasematch (mount[ent].posix_path, pathtmp)
|
|
: strcasematch (mount[ent].native_path, pathtmp)) &&
|
|
(mount[ent].flags & MOUNT_SYSTEM) == (flags & MOUNT_SYSTEM))
|
|
{
|
|
if (!posix_path_p &&
|
|
reg_p && del_reg_mount (mount[ent].posix_path, flags))
|
|
return -1;
|
|
|
|
nmounts--; /* One less mount table entry */
|
|
/* Fill in the hole if not at the end of the table */
|
|
if (ent < nmounts)
|
|
memmove (mount + ent, mount + ent + 1,
|
|
sizeof (mount[ent]) * (nmounts - ent));
|
|
sort (); /* Resort the table */
|
|
return 0;
|
|
}
|
|
}
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/************************* mount_item class ****************************/
|
|
|
|
static mntent *
|
|
fillout_mntent (const char *native_path, const char *posix_path, unsigned flags)
|
|
{
|
|
struct mntent& ret=_my_tls.locals.mntbuf;
|
|
|
|
/* Remove drivenum from list if we see a x: style path */
|
|
if (strlen (native_path) == 2 && native_path[1] == ':')
|
|
{
|
|
int drivenum = cyg_tolower (native_path[0]) - 'a';
|
|
if (drivenum >= 0 && drivenum <= 31)
|
|
_my_tls.locals.available_drives &= ~(1 << drivenum);
|
|
}
|
|
|
|
/* Pass back pointers to mount_table strings reserved for use by
|
|
getmntent rather than pointers to strings in the internal mount
|
|
table because the mount table might change, causing weird effects
|
|
from the getmntent user's point of view. */
|
|
|
|
strcpy (_my_tls.locals.mnt_fsname, native_path);
|
|
ret.mnt_fsname = _my_tls.locals.mnt_fsname;
|
|
strcpy (_my_tls.locals.mnt_dir, posix_path);
|
|
ret.mnt_dir = _my_tls.locals.mnt_dir;
|
|
|
|
if (!(flags & MOUNT_SYSTEM)) /* user mount */
|
|
strcpy (_my_tls.locals.mnt_type, (char *) "user");
|
|
else /* system mount */
|
|
strcpy (_my_tls.locals.mnt_type, (char *) "system");
|
|
|
|
ret.mnt_type = _my_tls.locals.mnt_type;
|
|
|
|
/* mnt_opts is a string that details mount params such as
|
|
binary or textmode, or exec. We don't print
|
|
`silent' here; it's a magic internal thing. */
|
|
|
|
if (!(flags & MOUNT_BINARY))
|
|
strcpy (_my_tls.locals.mnt_opts, (char *) "textmode");
|
|
else
|
|
strcpy (_my_tls.locals.mnt_opts, (char *) "binmode");
|
|
|
|
if (flags & MOUNT_CYGWIN_EXEC)
|
|
strcat (_my_tls.locals.mnt_opts, (char *) ",cygexec");
|
|
else if (flags & MOUNT_EXEC)
|
|
strcat (_my_tls.locals.mnt_opts, (char *) ",exec");
|
|
else if (flags & MOUNT_NOTEXEC)
|
|
strcat (_my_tls.locals.mnt_opts, (char *) ",noexec");
|
|
if (flags & MOUNT_ENC)
|
|
strcat (_my_tls.locals.mnt_opts, ",managed");
|
|
|
|
if ((flags & MOUNT_CYGDRIVE)) /* cygdrive */
|
|
strcat (_my_tls.locals.mnt_opts, (char *) ",noumount");
|
|
ret.mnt_opts = _my_tls.locals.mnt_opts;
|
|
|
|
ret.mnt_freq = 1;
|
|
ret.mnt_passno = 1;
|
|
return &ret;
|
|
}
|
|
|
|
struct mntent *
|
|
mount_item::getmntent ()
|
|
{
|
|
return fillout_mntent (native_path, posix_path, flags);
|
|
}
|
|
|
|
static struct mntent *
|
|
cygdrive_getmntent ()
|
|
{
|
|
char native_path[4];
|
|
char posix_path[CYG_MAX_PATH];
|
|
DWORD mask = 1, drive = 'a';
|
|
struct mntent *ret = NULL;
|
|
|
|
while (_my_tls.locals.available_drives)
|
|
{
|
|
for (/* nothing */; drive <= 'z'; mask <<= 1, drive++)
|
|
if (_my_tls.locals.available_drives & mask)
|
|
break;
|
|
|
|
__small_sprintf (native_path, "%c:\\", drive);
|
|
if (GetFileAttributes (native_path) == INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
_my_tls.locals.available_drives &= ~mask;
|
|
continue;
|
|
}
|
|
native_path[2] = '\0';
|
|
__small_sprintf (posix_path, "%s%c", mount_table->cygdrive, drive);
|
|
ret = fillout_mntent (native_path, posix_path, mount_table->cygdrive_flags);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct mntent *
|
|
mount_info::getmntent (int x)
|
|
{
|
|
if (x < 0 || x >= nmounts)
|
|
return cygdrive_getmntent ();
|
|
|
|
return mount[native_sorted[x]].getmntent ();
|
|
}
|
|
|
|
/* Fill in the fields of a mount table entry. */
|
|
|
|
void
|
|
mount_item::init (const char *native, const char *posix, unsigned mountflags)
|
|
{
|
|
strcpy ((char *) native_path, native);
|
|
strcpy ((char *) posix_path, posix);
|
|
|
|
native_pathlen = strlen (native_path);
|
|
posix_pathlen = strlen (posix_path);
|
|
|
|
flags = mountflags;
|
|
}
|
|
|
|
/********************** Mount System Calls **************************/
|
|
|
|
/* Mount table system calls.
|
|
Note that these are exported to the application. */
|
|
|
|
/* mount: Add a mount to the mount table in memory and to the registry
|
|
that will cause paths under win32_path to be translated to paths
|
|
under posix_path. */
|
|
|
|
extern "C" int
|
|
mount (const char *win32_path, const char *posix_path, unsigned flags)
|
|
{
|
|
int res = -1;
|
|
|
|
if (check_null_empty_str_errno (posix_path))
|
|
/* errno set */;
|
|
else if (strpbrk (posix_path, "\\:"))
|
|
set_errno (EINVAL);
|
|
else if (flags & MOUNT_CYGDRIVE) /* normal mount */
|
|
{
|
|
/* When flags include MOUNT_CYGDRIVE, take this to mean that
|
|
we actually want to change the cygdrive prefix and flags
|
|
without actually mounting anything. */
|
|
res = mount_table->write_cygdrive_info_to_registry (posix_path, flags);
|
|
win32_path = NULL;
|
|
}
|
|
else if (!check_null_empty_str_errno (win32_path))
|
|
res = mount_table->add_item (win32_path, posix_path, flags, true);
|
|
|
|
syscall_printf ("%d = mount (%s, %s, %p)", res, win32_path, posix_path, flags);
|
|
return res;
|
|
}
|
|
|
|
/* umount: The standard umount call only has a path parameter. Since
|
|
it is not possible for this call to specify whether to remove the
|
|
mount from the user or global mount registry table, assume the user
|
|
table. */
|
|
|
|
extern "C" int
|
|
umount (const char *path)
|
|
{
|
|
if (check_null_empty_str_errno (path))
|
|
return -1;
|
|
return cygwin_umount (path, 0);
|
|
}
|
|
|
|
/* cygwin_umount: This is like umount but takes an additional flags
|
|
parameter that specifies whether to umount from the user or system-wide
|
|
registry area. */
|
|
|
|
extern "C" int
|
|
cygwin_umount (const char *path, unsigned flags)
|
|
{
|
|
int res = -1;
|
|
|
|
if (flags & MOUNT_CYGDRIVE)
|
|
{
|
|
/* When flags include MOUNT_CYGDRIVE, take this to mean that we actually want
|
|
to remove the cygdrive prefix and flags without actually unmounting
|
|
anything. */
|
|
res = mount_table->remove_cygdrive_info_from_registry (path, flags);
|
|
}
|
|
else
|
|
{
|
|
res = mount_table->del_item (path, flags, true);
|
|
}
|
|
|
|
syscall_printf ("%d = cygwin_umount (%s, %d)", res, path, flags);
|
|
return res;
|
|
}
|
|
|
|
bool
|
|
is_floppy (const char *dos)
|
|
{
|
|
char dev[256];
|
|
if (!QueryDosDevice (dos, dev, 256))
|
|
return false;
|
|
return strncasematch (dev, "\\Device\\Floppy", 14)
|
|
|| strcasematch (dev, "A:");
|
|
}
|
|
|
|
extern "C" FILE *
|
|
setmntent (const char *filep, const char *)
|
|
{
|
|
_my_tls.locals.iteration = 0;
|
|
_my_tls.locals.available_drives = GetLogicalDrives ();
|
|
/* Filter floppy drives on A: and B: */
|
|
if ((_my_tls.locals.available_drives & 1) && is_floppy ("A:"))
|
|
_my_tls.locals.available_drives &= ~1;
|
|
if ((_my_tls.locals.available_drives & 2) && is_floppy ("B:"))
|
|
_my_tls.locals.available_drives &= ~2;
|
|
return (FILE *) filep;
|
|
}
|
|
|
|
extern "C" struct mntent *
|
|
getmntent (FILE *)
|
|
{
|
|
return mount_table->getmntent (_my_tls.locals.iteration++);
|
|
}
|
|
|
|
extern "C" int
|
|
endmntent (FILE *)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/********************** Symbolic Link Support **************************/
|
|
|
|
/* Read symlink from Extended Attribute */
|
|
int
|
|
get_symlink_ea (const char* frompath, char* buf, int buf_size)
|
|
{
|
|
int res = NTReadEA (frompath, SYMLINK_EA_NAME, buf, buf_size);
|
|
if (res == 0)
|
|
debug_printf ("Cannot read symlink from EA");
|
|
return (res - 1);
|
|
}
|
|
|
|
/* Save symlink to Extended Attribute */
|
|
bool
|
|
set_symlink_ea (const char* frompath, const char* topath)
|
|
{
|
|
if (!NTWriteEA (frompath, SYMLINK_EA_NAME, topath, strlen (topath) + 1))
|
|
{
|
|
debug_printf ("Cannot save symlink in EA");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Create a symlink from FROMPATH to TOPATH. */
|
|
|
|
/* If TRUE create symlinks as Windows shortcuts, if false create symlinks
|
|
as normal files with magic number and system bit set. */
|
|
bool allow_winsymlinks = true;
|
|
|
|
extern "C" int
|
|
symlink (const char *topath, const char *frompath)
|
|
{
|
|
return symlink_worker (topath, frompath, allow_winsymlinks, false);
|
|
}
|
|
|
|
int
|
|
symlink_worker (const char *topath, const char *frompath, bool use_winsym,
|
|
bool isdevice)
|
|
{
|
|
HANDLE h;
|
|
int res = -1;
|
|
path_conv win32_path, win32_topath;
|
|
char from[CYG_MAX_PATH + 5];
|
|
char cwd[CYG_MAX_PATH], *cp = NULL, c = 0;
|
|
char w32topath[CYG_MAX_PATH];
|
|
char reltopath[CYG_MAX_PATH] = { 0 };
|
|
DWORD written;
|
|
SECURITY_ATTRIBUTES sa = sec_none_nih;
|
|
security_descriptor sd;
|
|
|
|
/* POSIX says that empty 'frompath' is invalid input while empty
|
|
'topath' is valid -- it's symlink resolver job to verify if
|
|
symlink contents point to existing filesystem object */
|
|
if (check_null_empty_str_errno (topath) == EFAULT ||
|
|
check_null_empty_str_errno (frompath))
|
|
goto done;
|
|
|
|
if (strlen (topath) >= CYG_MAX_PATH)
|
|
{
|
|
set_errno (ENAMETOOLONG);
|
|
goto done;
|
|
}
|
|
|
|
win32_path.check (frompath, PC_SYM_NOFOLLOW);
|
|
if (use_winsym && !win32_path.exists ())
|
|
{
|
|
strcpy (from, frompath);
|
|
strcat (from, ".lnk");
|
|
win32_path.check (from, PC_SYM_NOFOLLOW);
|
|
}
|
|
|
|
if (win32_path.error)
|
|
{
|
|
set_errno (win32_path.case_clash ? ECASECLASH : win32_path.error);
|
|
goto done;
|
|
}
|
|
|
|
syscall_printf ("symlink (%s, %s)", topath, win32_path.get_win32 ());
|
|
|
|
if (win32_path.is_auto_device ())
|
|
{
|
|
set_errno (EEXIST);
|
|
goto done;
|
|
}
|
|
|
|
DWORD create_how;
|
|
if (!use_winsym)
|
|
create_how = CREATE_NEW;
|
|
else if (isdevice)
|
|
{
|
|
strcpy (w32topath, topath);
|
|
create_how = CREATE_ALWAYS;
|
|
(void) SetFileAttributes (win32_path, FILE_ATTRIBUTE_NORMAL);
|
|
}
|
|
else
|
|
{
|
|
if (!isabspath (topath))
|
|
{
|
|
getcwd (cwd, CYG_MAX_PATH);
|
|
if ((cp = strrchr (from, '/')) || (cp = strrchr (from, '\\')))
|
|
{
|
|
c = *cp;
|
|
*cp = '\0';
|
|
chdir (from);
|
|
}
|
|
backslashify (topath, reltopath, 0);
|
|
/* Creating an ITEMIDLIST requires an absolute path. So if we
|
|
create a shortcut file, we create relative and absolute Win32
|
|
paths, the first for the relpath field and the latter for the
|
|
ITEMIDLIST field. */
|
|
if (GetFileAttributes (reltopath) == INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
win32_topath.check (topath, PC_SYM_NOFOLLOW);
|
|
if (win32_topath.error != ENOENT)
|
|
strcpy (use_winsym ? reltopath : w32topath, win32_topath);
|
|
}
|
|
else if (!use_winsym)
|
|
strcpy (w32topath, reltopath);
|
|
if (use_winsym)
|
|
{
|
|
win32_topath.check (topath, PC_SYM_NOFOLLOW);
|
|
strcpy (w32topath, win32_topath);
|
|
}
|
|
if (cp)
|
|
{
|
|
*cp = c;
|
|
chdir (cwd);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
win32_topath.check (topath, PC_SYM_NOFOLLOW);
|
|
strcpy (w32topath, win32_topath);
|
|
}
|
|
create_how = CREATE_NEW;
|
|
}
|
|
|
|
if (allow_ntsec && win32_path.has_acls ())
|
|
set_security_attribute (S_IFLNK | STD_RBITS | STD_WBITS,
|
|
&sa, sd);
|
|
|
|
h = CreateFile (win32_path, GENERIC_WRITE, 0, &sa, create_how,
|
|
FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
__seterrno ();
|
|
else
|
|
{
|
|
bool success = false;
|
|
|
|
if (use_winsym)
|
|
{
|
|
/* A path of 240 chars with 120 one character directories in it
|
|
can result in a 6K shortcut. */
|
|
char *buf = (char *) alloca (8192);
|
|
win_shortcut_hdr *shortcut_header = (win_shortcut_hdr *) buf;
|
|
HRESULT hres;
|
|
IShellFolder *psl;
|
|
WCHAR wc_path[CYG_MAX_PATH];
|
|
ITEMIDLIST *pidl = NULL, *p;
|
|
unsigned short len;
|
|
|
|
memset (shortcut_header, 0, sizeof *shortcut_header);
|
|
shortcut_header->size = sizeof *shortcut_header;
|
|
shortcut_header->magic = GUID_shortcut;
|
|
shortcut_header->flags = (WSH_FLAG_DESC | WSH_FLAG_RELPATH);
|
|
shortcut_header->run = SW_NORMAL;
|
|
cp = buf + sizeof (win_shortcut_hdr);
|
|
/* Creating an IDLIST */
|
|
hres = SHGetDesktopFolder (&psl);
|
|
if (SUCCEEDED (hres))
|
|
{
|
|
MultiByteToWideChar (CP_ACP, 0, w32topath, -1, wc_path,
|
|
CYG_MAX_PATH);
|
|
hres = psl->ParseDisplayName (NULL, NULL, wc_path, NULL,
|
|
&pidl, NULL);
|
|
if (SUCCEEDED (hres))
|
|
{
|
|
shortcut_header->flags |= WSH_FLAG_IDLIST;
|
|
for (p = pidl; p->mkid.cb > 0;
|
|
p = (ITEMIDLIST *)((char *) p + p->mkid.cb))
|
|
;
|
|
len = (char *) p - (char *) pidl + 2;
|
|
*(unsigned short *)cp = len;
|
|
memcpy (cp += 2, pidl, len);
|
|
cp += len;
|
|
CoTaskMemFree (pidl);
|
|
}
|
|
psl->Release ();
|
|
}
|
|
/* Creating a description */
|
|
*(unsigned short *)cp = len = strlen (topath);
|
|
memcpy (cp += 2, topath, len);
|
|
cp += len;
|
|
/* Creating a relpath */
|
|
if (reltopath[0])
|
|
{
|
|
*(unsigned short *)cp = len = strlen (reltopath);
|
|
memcpy (cp += 2, reltopath, len);
|
|
}
|
|
else
|
|
{
|
|
*(unsigned short *)cp = len = strlen (w32topath);
|
|
memcpy (cp += 2, w32topath, len);
|
|
}
|
|
cp += len;
|
|
success = WriteFile (h, buf, cp - buf, &written, NULL)
|
|
&& written == (DWORD) (cp - buf);
|
|
}
|
|
else
|
|
{
|
|
/* This is the old technique creating a symlink. */
|
|
char buf[sizeof (SYMLINK_COOKIE) + CYG_MAX_PATH + 10];
|
|
|
|
__small_sprintf (buf, "%s%s", SYMLINK_COOKIE, topath);
|
|
DWORD len = strlen (buf) + 1;
|
|
|
|
/* Note that the terminating nul is written. */
|
|
success = WriteFile (h, buf, len, &written, NULL)
|
|
|| written != len;
|
|
|
|
}
|
|
if (success)
|
|
{
|
|
CloseHandle (h);
|
|
if (!allow_ntsec && allow_ntea)
|
|
set_file_attribute (false, NULL, win32_path.get_win32 (),
|
|
S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO);
|
|
|
|
DWORD attr = use_winsym ? FILE_ATTRIBUTE_READONLY
|
|
: FILE_ATTRIBUTE_SYSTEM;
|
|
#ifdef HIDDEN_DOT_FILES
|
|
cp = strrchr (win32_path, '\\');
|
|
if ((cp && cp[1] == '.') || *win32_path == '.')
|
|
attr |= FILE_ATTRIBUTE_HIDDEN;
|
|
#endif
|
|
SetFileAttributes (win32_path, attr);
|
|
|
|
if (!isdevice && win32_path.fs_has_ea ())
|
|
set_symlink_ea (win32_path, topath);
|
|
res = 0;
|
|
}
|
|
else
|
|
{
|
|
__seterrno ();
|
|
CloseHandle (h);
|
|
DeleteFileA (win32_path.get_win32 ());
|
|
}
|
|
}
|
|
|
|
done:
|
|
syscall_printf ("%d = symlink_worker (%s, %s, %d, %d)", res, topath,
|
|
frompath, use_winsym, isdevice);
|
|
return res;
|
|
}
|
|
|
|
static bool
|
|
cmp_shortcut_header (win_shortcut_hdr *file_header)
|
|
{
|
|
/* A Cygwin or U/Win shortcut only contains a description and a relpath.
|
|
Cygwin shortcuts also might contain an ITEMIDLIST. The run type is
|
|
always set to SW_NORMAL. */
|
|
return file_header->size == sizeof (win_shortcut_hdr)
|
|
&& !memcmp (&file_header->magic, &GUID_shortcut, sizeof GUID_shortcut)
|
|
&& (file_header->flags & ~WSH_FLAG_IDLIST)
|
|
== (WSH_FLAG_DESC | WSH_FLAG_RELPATH)
|
|
&& file_header->run == SW_NORMAL;
|
|
}
|
|
|
|
int
|
|
symlink_info::check_shortcut (const char *path, HANDLE h)
|
|
{
|
|
win_shortcut_hdr *file_header;
|
|
char *buf, *cp;
|
|
unsigned short len;
|
|
int res = 0;
|
|
DWORD size, got = 0;
|
|
|
|
/* Valid Cygwin & U/WIN shortcuts are R/O. */
|
|
if (!(fileattr & FILE_ATTRIBUTE_READONLY))
|
|
goto file_not_symlink;
|
|
|
|
if ((size = GetFileSize (h, NULL)) > 8192) /* Not a Cygwin symlink. */
|
|
goto file_not_symlink;
|
|
buf = (char *) alloca (size);
|
|
if (!ReadFile (h, buf, size, &got, 0))
|
|
{
|
|
set_error (EIO);
|
|
goto close_it;
|
|
}
|
|
file_header = (win_shortcut_hdr *) buf;
|
|
if (got != size || !cmp_shortcut_header (file_header))
|
|
goto file_not_symlink;
|
|
cp = buf + sizeof (win_shortcut_hdr);
|
|
if (file_header->flags & WSH_FLAG_IDLIST) /* Skip ITEMIDLIST */
|
|
cp += *(unsigned short *) cp + 2;
|
|
if ((len = *(unsigned short *) cp) == 0 || len >= CYG_MAX_PATH)
|
|
goto file_not_symlink;
|
|
strncpy (contents, cp += 2, len);
|
|
contents[len] = '\0';
|
|
res = len;
|
|
if (res) /* It's a symlink. */
|
|
pflags = PATH_SYMLINK | PATH_LNK;
|
|
goto close_it;
|
|
|
|
file_not_symlink:
|
|
/* Not a symlink, see if executable. */
|
|
if (!(pflags & PATH_ALL_EXEC) && has_exec_chars ((const char *) &file_header, got))
|
|
pflags |= PATH_EXEC;
|
|
|
|
close_it:
|
|
CloseHandle (h);
|
|
return res;
|
|
}
|
|
|
|
|
|
int
|
|
symlink_info::check_sysfile (const char *path, HANDLE h)
|
|
{
|
|
char cookie_buf[sizeof (SYMLINK_COOKIE) - 1];
|
|
DWORD got;
|
|
int res = 0;
|
|
|
|
if (!ReadFile (h, cookie_buf, sizeof (cookie_buf), &got, 0))
|
|
{
|
|
debug_printf ("ReadFile1 failed");
|
|
set_error (EIO);
|
|
}
|
|
else if (got == sizeof (cookie_buf)
|
|
&& memcmp (cookie_buf, SYMLINK_COOKIE, sizeof (cookie_buf)) == 0)
|
|
{
|
|
/* It's a symlink. */
|
|
pflags = PATH_SYMLINK;
|
|
|
|
res = ReadFile (h, contents, CYG_MAX_PATH, &got, 0);
|
|
if (!res)
|
|
{
|
|
debug_printf ("ReadFile2 failed");
|
|
set_error (EIO);
|
|
}
|
|
else
|
|
{
|
|
/* Versions prior to b16 stored several trailing
|
|
NULs with the path (to fill the path out to 1024
|
|
chars). Current versions only store one trailing
|
|
NUL. The length returned is the path without
|
|
*any* trailing NULs. We also have to handle (or
|
|
at least not die from) corrupted paths. */
|
|
char *end;
|
|
if ((end = (char *) memchr (contents, 0, got)) != NULL)
|
|
res = end - contents;
|
|
else
|
|
res = got;
|
|
}
|
|
}
|
|
else if (got == sizeof (cookie_buf)
|
|
&& memcmp (cookie_buf, SOCKET_COOKIE, sizeof (cookie_buf)) == 0)
|
|
pflags |= PATH_SOCKET;
|
|
else
|
|
{
|
|
/* Not a symlink, see if executable. */
|
|
if (pflags & PATH_ALL_EXEC)
|
|
/* Nothing to do */;
|
|
else if (has_exec_chars (cookie_buf, got))
|
|
pflags |= PATH_EXEC;
|
|
else
|
|
pflags |= PATH_NOTEXEC;
|
|
}
|
|
syscall_printf ("%d = symlink.check_sysfile (%s, %s) (%p)",
|
|
res, path, contents, pflags);
|
|
|
|
CloseHandle (h);
|
|
return res;
|
|
}
|
|
|
|
enum
|
|
{
|
|
SCAN_BEG,
|
|
SCAN_LNK,
|
|
SCAN_HASLNK,
|
|
SCAN_JUSTCHECK,
|
|
SCAN_APPENDLNK,
|
|
SCAN_EXTRALNK,
|
|
SCAN_DONE,
|
|
};
|
|
|
|
class suffix_scan
|
|
{
|
|
const suffix_info *suffixes, *suffixes_start;
|
|
int nextstate;
|
|
char *eopath;
|
|
public:
|
|
const char *path;
|
|
char *has (const char *, const suffix_info *);
|
|
int next ();
|
|
int lnk_match () {return nextstate >= SCAN_EXTRALNK;}
|
|
};
|
|
|
|
char *
|
|
suffix_scan::has (const char *in_path, const suffix_info *in_suffixes)
|
|
{
|
|
nextstate = SCAN_BEG;
|
|
suffixes = suffixes_start = in_suffixes;
|
|
|
|
char *ext_here = strrchr (in_path, '.');
|
|
path = in_path;
|
|
eopath = strchr (path, '\0');
|
|
|
|
if (!ext_here)
|
|
goto noext;
|
|
|
|
if (suffixes)
|
|
{
|
|
/* Check if the extension matches a known extension */
|
|
for (const suffix_info *ex = in_suffixes; ex->name != NULL; ex++)
|
|
if (strcasematch (ext_here, ex->name))
|
|
{
|
|
nextstate = SCAN_JUSTCHECK;
|
|
suffixes = NULL; /* Has an extension so don't scan for one. */
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Didn't match. Use last resort -- .lnk. */
|
|
if (strcasematch (ext_here, ".lnk"))
|
|
{
|
|
nextstate = SCAN_HASLNK;
|
|
suffixes = NULL;
|
|
}
|
|
|
|
noext:
|
|
ext_here = eopath;
|
|
|
|
done:
|
|
return ext_here;
|
|
}
|
|
|
|
int
|
|
suffix_scan::next ()
|
|
{
|
|
for (;;)
|
|
{
|
|
if (!suffixes)
|
|
switch (nextstate)
|
|
{
|
|
case SCAN_BEG:
|
|
suffixes = suffixes_start;
|
|
if (!suffixes)
|
|
{
|
|
nextstate = SCAN_LNK;
|
|
return 1;
|
|
}
|
|
if (!*suffixes->name)
|
|
suffixes++;
|
|
nextstate = SCAN_EXTRALNK;
|
|
/* fall through to suffix checking below */
|
|
break;
|
|
case SCAN_HASLNK:
|
|
nextstate = SCAN_EXTRALNK; /* Skip SCAN_BEG */
|
|
return 1;
|
|
case SCAN_LNK:
|
|
case SCAN_EXTRALNK:
|
|
strcpy (eopath, ".lnk");
|
|
nextstate = SCAN_DONE;
|
|
return 1;
|
|
case SCAN_JUSTCHECK:
|
|
nextstate = SCAN_APPENDLNK;
|
|
return 1;
|
|
case SCAN_APPENDLNK:
|
|
strcat (eopath, ".lnk");
|
|
nextstate = SCAN_DONE;
|
|
return 1;
|
|
default:
|
|
*eopath = '\0';
|
|
return 0;
|
|
}
|
|
|
|
while (suffixes && suffixes->name)
|
|
if (!suffixes->addon)
|
|
suffixes++;
|
|
else
|
|
{
|
|
strcpy (eopath, suffixes->name);
|
|
if (nextstate == SCAN_EXTRALNK)
|
|
strcat (eopath, ".lnk");
|
|
suffixes++;
|
|
return 1;
|
|
}
|
|
suffixes = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
symlink_info::set_error (int in_errno)
|
|
{
|
|
if ((pflags & PATH_NO_ACCESS_CHECK) && in_errno != ENAMETOOLONG)
|
|
return;
|
|
error = in_errno;
|
|
}
|
|
|
|
bool
|
|
symlink_info::parse_device (const char *contents)
|
|
{
|
|
char *endptr;
|
|
_major_t mymajor;
|
|
_major_t myminor;
|
|
_mode_t mymode;
|
|
|
|
mymajor = strtol (contents += 2, &endptr, 16);
|
|
if (endptr == contents)
|
|
return false;
|
|
|
|
contents = endptr;
|
|
myminor = strtol (++contents, &endptr, 16);
|
|
if (endptr == contents)
|
|
return false;
|
|
|
|
contents = endptr;
|
|
mymode = strtol (++contents, &endptr, 16);
|
|
if (endptr == contents)
|
|
return false;
|
|
|
|
switch (mymode & S_IFMT)
|
|
{
|
|
case S_IFIFO:
|
|
mymajor = _major (FH_FIFO);
|
|
myminor = _minor (FH_FIFO);
|
|
break;
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
if (mymajor || myminor)
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
major = mymajor;
|
|
minor = myminor;
|
|
mode = mymode;
|
|
return true;
|
|
}
|
|
|
|
/* Check if PATH is a symlink. PATH must be a valid Win32 path name.
|
|
|
|
If PATH is a symlink, put the value of the symlink--the file to
|
|
which it points--into BUF. The value stored in BUF is not
|
|
necessarily null terminated. BUFLEN is the length of BUF; only up
|
|
to BUFLEN characters will be stored in BUF. BUF may be NULL, in
|
|
which case nothing will be stored.
|
|
|
|
Set *SYML if PATH is a symlink.
|
|
|
|
Set *EXEC if PATH appears to be executable. This is an efficiency
|
|
hack because we sometimes have to open the file anyhow. *EXEC will
|
|
not be set for every executable file.
|
|
|
|
Return -1 on error, 0 if PATH is not a symlink, or the length
|
|
stored into BUF if PATH is a symlink. */
|
|
|
|
int
|
|
symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt)
|
|
{
|
|
HANDLE h;
|
|
int res = 0;
|
|
suffix_scan suffix;
|
|
contents[0] = '\0';
|
|
|
|
is_symlink = true;
|
|
ext_here = suffix.has (path, suffixes);
|
|
extn = ext_here - path;
|
|
major = 0;
|
|
minor = 0;
|
|
|
|
pflags &= ~(PATH_SYMLINK | PATH_LNK);
|
|
unsigned pflags_or = pflags & PATH_NO_ACCESS_CHECK;
|
|
|
|
case_clash = false;
|
|
|
|
while (suffix.next ())
|
|
{
|
|
error = 0;
|
|
fileattr = GetFileAttributes (suffix.path);
|
|
if (fileattr == INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
/* The GetFileAttributes call can fail for reasons that don't
|
|
matter, so we just return 0. For example, getting the
|
|
attributes of \\HOST will typically fail. */
|
|
debug_printf ("GetFileAttributes (%s) failed", suffix.path);
|
|
|
|
/* The above comment is not *quite* right. When calling
|
|
GetFileAttributes for a non-existant file an a Win9x share,
|
|
GetLastError returns ERROR_INVALID_FUNCTION. Go figure! */
|
|
DWORD win_error = GetLastError ();
|
|
if (win_error == ERROR_INVALID_FUNCTION)
|
|
win_error = ERROR_FILE_NOT_FOUND;
|
|
set_error (geterrno_from_win_error (win_error, EACCES));
|
|
continue;
|
|
}
|
|
|
|
|
|
ext_tacked_on = !!*ext_here;
|
|
|
|
if (pcheck_case != PCHECK_RELAXED && !case_check (path)
|
|
|| (opt & PC_SYM_IGNORE))
|
|
goto file_not_symlink;
|
|
|
|
int sym_check;
|
|
|
|
sym_check = 0;
|
|
|
|
if (fileattr & FILE_ATTRIBUTE_DIRECTORY)
|
|
goto file_not_symlink;
|
|
|
|
/* Windows shortcuts are treated as symlinks. */
|
|
if (suffix.lnk_match ())
|
|
sym_check = 1;
|
|
|
|
/* This is the old Cygwin method creating symlinks: */
|
|
/* A symlink will have the `system' file attribute. */
|
|
/* Only files can be symlinks (which can be symlinks to directories). */
|
|
if (fileattr & FILE_ATTRIBUTE_SYSTEM)
|
|
sym_check = 2;
|
|
|
|
if (!sym_check)
|
|
goto file_not_symlink;
|
|
|
|
if (sym_check > 0 && opt & PC_CHECK_EA &&
|
|
(res = get_symlink_ea (suffix.path, contents, sizeof (contents))) > 0)
|
|
{
|
|
pflags = PATH_SYMLINK | pflags_or;
|
|
if (sym_check == 1)
|
|
pflags |= PATH_LNK;
|
|
debug_printf ("Got symlink from EA: %s", contents);
|
|
break;
|
|
}
|
|
|
|
/* Open the file. */
|
|
|
|
h = CreateFile (suffix.path, GENERIC_READ, FILE_SHARE_READ,
|
|
&sec_none_nih, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
|
|
res = -1;
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
goto file_not_symlink;
|
|
|
|
/* FIXME: if symlink isn't present in EA, but EAs are supported,
|
|
should we write it there? */
|
|
switch (sym_check)
|
|
{
|
|
case 1:
|
|
res = check_shortcut (suffix.path, h);
|
|
if (!res)
|
|
/* check more below */;
|
|
else if (contents[0] == ':' && contents[1] == '\\' && parse_device (contents))
|
|
goto file_not_symlink;
|
|
else
|
|
break;
|
|
/* If searching for `foo' and then finding a `foo.lnk' which is
|
|
no shortcut, return the same as if file not found. */
|
|
if (!suffix.lnk_match () || !ext_tacked_on)
|
|
goto file_not_symlink;
|
|
|
|
fileattr = INVALID_FILE_ATTRIBUTES;
|
|
continue; /* in case we're going to tack *another* .lnk on this filename. */
|
|
case 2:
|
|
res = check_sysfile (suffix.path, h);
|
|
if (!res)
|
|
goto file_not_symlink;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
file_not_symlink:
|
|
is_symlink = false;
|
|
syscall_printf ("%s", (major || minor) ? "is a device" : "not a symlink");
|
|
res = 0;
|
|
break;
|
|
}
|
|
|
|
syscall_printf ("%d = symlink.check (%s, %p) (%p)",
|
|
res, suffix.path, contents, pflags);
|
|
return res;
|
|
}
|
|
|
|
/* "path" is the path in a virtual symlink. Set a symlink_info struct from
|
|
that and proceed with further path checking afterwards. */
|
|
int
|
|
symlink_info::set (char *path)
|
|
{
|
|
strcpy (contents, path);
|
|
pflags = PATH_SYMLINK;
|
|
fileattr = FILE_ATTRIBUTE_NORMAL;
|
|
error = 0;
|
|
is_symlink = true;
|
|
ext_tacked_on = case_clash = false;
|
|
ext_here = NULL;
|
|
extn = major = minor = mode = 0;
|
|
return strlen (path);
|
|
}
|
|
|
|
/* Check the correct case of the last path component (given in DOS style).
|
|
Adjust the case in this->path if pcheck_case == PCHECK_ADJUST or return
|
|
false if pcheck_case == PCHECK_STRICT.
|
|
Dont't call if pcheck_case == PCHECK_RELAXED.
|
|
*/
|
|
|
|
bool
|
|
symlink_info::case_check (char *path)
|
|
{
|
|
WIN32_FIND_DATA data;
|
|
HANDLE h;
|
|
char *c;
|
|
|
|
/* Set a pointer to the beginning of the last component. */
|
|
if (!(c = strrchr (path, '\\')))
|
|
c = path;
|
|
else
|
|
++c;
|
|
|
|
if ((h = FindFirstFile (path, &data))
|
|
!= INVALID_HANDLE_VALUE)
|
|
{
|
|
FindClose (h);
|
|
|
|
/* If that part of the component exists, check the case. */
|
|
if (strncmp (c, data.cFileName, strlen (data.cFileName)))
|
|
{
|
|
case_clash = true;
|
|
|
|
/* If check is set to STRICT, a wrong case results
|
|
in returning a ENOENT. */
|
|
if (pcheck_case == PCHECK_STRICT)
|
|
return false;
|
|
|
|
/* PCHECK_ADJUST adjusts the case in the incoming
|
|
path which points to the path in *this. */
|
|
strcpy (c, data.cFileName);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* readlink system call */
|
|
|
|
extern "C" int
|
|
readlink (const char *path, char *buf, int buflen)
|
|
{
|
|
extern suffix_info stat_suffixes[];
|
|
|
|
if (buflen < 0)
|
|
{
|
|
set_errno (ENAMETOOLONG);
|
|
return -1;
|
|
}
|
|
|
|
path_conv pathbuf (path, PC_SYM_CONTENTS, stat_suffixes);
|
|
|
|
if (pathbuf.error)
|
|
{
|
|
set_errno (pathbuf.error);
|
|
syscall_printf ("-1 = readlink (%s, %p, %d)", path, buf, buflen);
|
|
return -1;
|
|
}
|
|
|
|
if (!pathbuf.exists ())
|
|
{
|
|
set_errno (ENOENT);
|
|
return -1;
|
|
}
|
|
|
|
if (!pathbuf.issymlink ())
|
|
{
|
|
if (pathbuf.exists ())
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int len = min (buflen, (int) strlen (pathbuf.get_win32 ()));
|
|
memcpy (buf, pathbuf.get_win32 (), len);
|
|
|
|
/* errno set by symlink.check if error */
|
|
return len;
|
|
}
|
|
|
|
/* Some programs rely on st_dev/st_ino being unique for each file.
|
|
Hash the path name and hope for the best. The hash arg is not
|
|
always initialized to zero since readdir needs to compute the
|
|
dirent ino_t based on a combination of the hash of the directory
|
|
done during the opendir call and the hash or the filename within
|
|
the directory. FIXME: Not bullet-proof. */
|
|
/* Cygwin internal */
|
|
|
|
__ino64_t __stdcall
|
|
hash_path_name (__ino64_t hash, const char *name)
|
|
{
|
|
if (!*name)
|
|
return hash;
|
|
|
|
/* Perform some initial permutations on the pathname if this is
|
|
not "seeded" */
|
|
if (!hash)
|
|
{
|
|
/* Simplistic handling of drives. If there is a drive specified,
|
|
make sure that the initial letter is upper case. If there is
|
|
no \ after the ':' assume access through the root directory
|
|
of that drive.
|
|
FIXME: Should really honor MS-Windows convention of using
|
|
the environment to track current directory on various drives. */
|
|
if (name[1] == ':')
|
|
{
|
|
char *nn, *newname = (char *) alloca (strlen (name) + 2);
|
|
nn = newname;
|
|
*nn = isupper (*name) ? cyg_tolower (*name) : *name;
|
|
*++nn = ':';
|
|
name += 2;
|
|
if (*name != '\\')
|
|
*++nn = '\\';
|
|
strcpy (++nn, name);
|
|
name = newname;
|
|
goto hashit;
|
|
}
|
|
|
|
/* Fill out the hashed path name with the current working directory if
|
|
this is not an absolute path and there is no pre-specified hash value.
|
|
Otherwise the inodes same will differ depending on whether a file is
|
|
referenced with an absolute value or relatively. */
|
|
|
|
if (!hash && !isabspath (name))
|
|
{
|
|
hash = cygheap->cwd.get_hash ();
|
|
if (name[0] == '.' && name[1] == '\0')
|
|
return hash;
|
|
hash = '\\' + (hash << 6) + (hash << 16) - hash;
|
|
}
|
|
}
|
|
|
|
hashit:
|
|
/* Build up hash. Name is already normalized */
|
|
do
|
|
{
|
|
int ch = cyg_tolower (*name);
|
|
hash = ch + (hash << 6) + (hash << 16) - hash;
|
|
}
|
|
while (*++name != '\0');
|
|
return hash;
|
|
}
|
|
|
|
char *
|
|
getcwd (char *buf, size_t ulen)
|
|
{
|
|
char* res = NULL;
|
|
if (ulen == 0 && buf)
|
|
set_errno (EINVAL);
|
|
else if (buf == NULL || !__check_null_invalid_struct_errno (buf, ulen))
|
|
res = cygheap->cwd.get (buf, 1, 1, ulen);
|
|
return res;
|
|
}
|
|
|
|
/* getwd: standards? */
|
|
extern "C" char *
|
|
getwd (char *buf)
|
|
{
|
|
return getcwd (buf, CYG_MAX_PATH);
|
|
}
|
|
|
|
/* chdir: POSIX 5.2.1.1 */
|
|
extern "C" int
|
|
chdir (const char *in_dir)
|
|
{
|
|
if (check_null_empty_str_errno (in_dir))
|
|
return -1;
|
|
|
|
syscall_printf ("dir '%s'", in_dir);
|
|
|
|
/* Convert path. First argument ensures that we don't check for NULL/empty/invalid
|
|
again. */
|
|
path_conv path (PC_NONULLEMPTY, in_dir, PC_SYM_FOLLOW | PC_POSIX);
|
|
if (path.error)
|
|
{
|
|
set_errno (path.error);
|
|
syscall_printf ("-1 = chdir (%s)", in_dir);
|
|
return -1;
|
|
}
|
|
|
|
int res = -1;
|
|
bool doit = false;
|
|
const char *native_dir = path, *posix_cwd = NULL;
|
|
int devn = path.get_devn ();
|
|
if (!isvirtual_dev (devn))
|
|
{
|
|
/* Check to see if path translates to something like C:.
|
|
If it does, append a \ to the native directory specification to
|
|
defeat the Windows 95 (i.e. MS-DOS) tendency of returning to
|
|
the last directory visited on the given drive. */
|
|
if (isdrive (native_dir) && !native_dir[2])
|
|
{
|
|
path.get_win32 ()[2] = '\\';
|
|
path.get_win32 ()[3] = '\0';
|
|
}
|
|
/* The sequence chdir("xx"); chdir(".."); must be a noop if xx
|
|
is not a symlink. This is exploited by find.exe.
|
|
The posix_cwd is just path.normalized_path.
|
|
In other cases we let cwd.set obtain the Posix path through
|
|
the mount table. */
|
|
if (!isdrive(path.normalized_path))
|
|
posix_cwd = path.normalized_path;
|
|
res = 0;
|
|
doit = true;
|
|
}
|
|
else if (!path.exists ())
|
|
set_errno (ENOENT);
|
|
else if (!path.isdir ())
|
|
set_errno (ENOTDIR);
|
|
else
|
|
{
|
|
posix_cwd = path.normalized_path;
|
|
res = 0;
|
|
}
|
|
|
|
if (!res)
|
|
res = cygheap->cwd.set (native_dir, posix_cwd, doit);
|
|
|
|
/* Note that we're accessing cwd.posix without a lock here. I didn't think
|
|
it was worth locking just for strace. */
|
|
syscall_printf ("%d = chdir() cygheap->cwd.posix '%s' native '%s'", res,
|
|
cygheap->cwd.posix, native_dir);
|
|
MALLOC_CHECK;
|
|
return res;
|
|
}
|
|
|
|
extern "C" int
|
|
fchdir (int fd)
|
|
{
|
|
int res;
|
|
cygheap_fdget cfd (fd);
|
|
if (cfd >= 0)
|
|
res = chdir (cfd->get_name ());
|
|
else
|
|
res = -1;
|
|
|
|
syscall_printf ("%d = fchdir (%d)", res, fd);
|
|
return res;
|
|
}
|
|
|
|
/******************** Exported Path Routines *********************/
|
|
|
|
/* Cover functions to the path conversion routines.
|
|
These are exported to the world as cygwin_foo by cygwin.din. */
|
|
|
|
#define return_with_errno(x) \
|
|
do {\
|
|
int err = (x);\
|
|
if (!err)\
|
|
return 0;\
|
|
set_errno (err);\
|
|
return -1;\
|
|
} while (0)
|
|
|
|
extern "C" int
|
|
cygwin_conv_to_win32_path (const char *path, char *win32_path)
|
|
{
|
|
path_conv p (path, PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOFULL);
|
|
if (p.error)
|
|
{
|
|
win32_path[0] = '\0';
|
|
set_errno (p.error);
|
|
return -1;
|
|
}
|
|
|
|
strcpy (win32_path, p);
|
|
return 0;
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_conv_to_full_win32_path (const char *path, char *win32_path)
|
|
{
|
|
path_conv p (path, PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK);
|
|
if (p.error)
|
|
{
|
|
win32_path[0] = '\0';
|
|
set_errno (p.error);
|
|
return -1;
|
|
}
|
|
|
|
strcpy (win32_path, p);
|
|
return 0;
|
|
}
|
|
|
|
/* This is exported to the world as cygwin_foo by cygwin.din. */
|
|
|
|
extern "C" int
|
|
cygwin_conv_to_posix_path (const char *path, char *posix_path)
|
|
{
|
|
if (check_null_empty_str_errno (path))
|
|
return -1;
|
|
return_with_errno (mount_table->conv_to_posix_path (path, posix_path, 1));
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_conv_to_full_posix_path (const char *path, char *posix_path)
|
|
{
|
|
if (check_null_empty_str_errno (path))
|
|
return -1;
|
|
return_with_errno (mount_table->conv_to_posix_path (path, posix_path, 0));
|
|
}
|
|
|
|
/* The realpath function is supported on some UNIX systems. */
|
|
|
|
extern "C" char *
|
|
realpath (const char *path, char *resolved)
|
|
{
|
|
extern suffix_info stat_suffixes[];
|
|
int err;
|
|
|
|
path_conv real_path (path, PC_SYM_FOLLOW, stat_suffixes);
|
|
|
|
if (real_path.error)
|
|
err = real_path.error;
|
|
else
|
|
{
|
|
err = mount_table->conv_to_posix_path (real_path.get_win32 (), resolved, 0);
|
|
if (err == 0)
|
|
return resolved;
|
|
}
|
|
|
|
/* FIXME: on error, we are supposed to put the name of the path
|
|
component which could not be resolved into RESOLVED. */
|
|
resolved[0] = '\0';
|
|
|
|
set_errno (err);
|
|
return NULL;
|
|
}
|
|
|
|
/* Return non-zero if path is a POSIX path list.
|
|
This is exported to the world as cygwin_foo by cygwin.din.
|
|
|
|
DOCTOOL-START
|
|
<sect1 id="add-func-cygwin-posix-path-list-p">
|
|
<para>Rather than use a mode to say what the "proper" path list
|
|
format is, we allow any, and give apps the tools they need to
|
|
convert between the two. If a ';' is present in the path list it's
|
|
a Win32 path list. Otherwise, if the first path begins with
|
|
[letter]: (in which case it can be the only element since if it
|
|
wasn't a ';' would be present) it's a Win32 path list. Otherwise,
|
|
it's a POSIX path list.</para>
|
|
</sect1>
|
|
DOCTOOL-END
|
|
*/
|
|
|
|
extern "C" int
|
|
cygwin_posix_path_list_p (const char *path)
|
|
{
|
|
int posix_p = !(strchr (path, ';') || isdrive (path));
|
|
return posix_p;
|
|
}
|
|
|
|
/* These are used for apps that need to convert env vars like PATH back and
|
|
forth. The conversion is a two step process. First, an upper bound on the
|
|
size of the buffer needed is computed. Then the conversion is done. This
|
|
allows the caller to use alloca if it wants. */
|
|
|
|
static int
|
|
conv_path_list_buf_size (const char *path_list, bool to_posix)
|
|
{
|
|
int i, num_elms, max_mount_path_len, size;
|
|
const char *p;
|
|
|
|
path_conv pc(".", PC_POSIX);
|
|
/* The theory is that an upper bound is
|
|
current_size + (num_elms * max_mount_path_len) */
|
|
|
|
unsigned nrel;
|
|
char delim = to_posix ? ';' : ':';
|
|
for (p = path_list, num_elms = nrel = 0; p; num_elms++)
|
|
{
|
|
if (!isabspath (p))
|
|
nrel++;
|
|
p = strchr (++p, delim);
|
|
}
|
|
|
|
/* 7: strlen ("//c") + slop, a conservative initial value */
|
|
for (max_mount_path_len = sizeof ("/cygdrive/X"), i = 0;
|
|
i < mount_table->nmounts; i++)
|
|
{
|
|
int mount_len = (to_posix
|
|
? mount_table->mount[i].posix_pathlen
|
|
: mount_table->mount[i].native_pathlen);
|
|
if (max_mount_path_len < mount_len)
|
|
max_mount_path_len = mount_len;
|
|
}
|
|
|
|
/* 100: slop */
|
|
size = strlen (path_list)
|
|
+ (num_elms * max_mount_path_len)
|
|
+ (nrel * strlen (to_posix ? pc.normalized_path : pc.get_win32 ()))
|
|
+ 100;
|
|
|
|
return size;
|
|
}
|
|
|
|
|
|
extern "C" int
|
|
cygwin_win32_to_posix_path_list_buf_size (const char *path_list)
|
|
{
|
|
return conv_path_list_buf_size (path_list, true);
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_posix_to_win32_path_list_buf_size (const char *path_list)
|
|
{
|
|
return conv_path_list_buf_size (path_list, false);
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_win32_to_posix_path_list (const char *win32, char *posix)
|
|
{
|
|
return_with_errno (conv_path_list (win32, posix, 1));
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_posix_to_win32_path_list (const char *posix, char *win32)
|
|
{
|
|
return_with_errno (conv_path_list (posix, win32, 0));
|
|
}
|
|
|
|
/* cygwin_split_path: Split a path into directory and file name parts.
|
|
Buffers DIR and FILE are assumed to be big enough.
|
|
|
|
Examples (path -> `dir' / `file'):
|
|
/ -> `/' / `'
|
|
"" -> `.' / `'
|
|
. -> `.' / `.' (FIXME: should this be `.' / `'?)
|
|
.. -> `.' / `..' (FIXME: should this be `..' / `'?)
|
|
foo -> `.' / `foo'
|
|
foo/bar -> `foo' / `bar'
|
|
foo/bar/ -> `foo' / `bar'
|
|
/foo -> `/' / `foo'
|
|
/foo/bar -> `/foo' / `bar'
|
|
c: -> `c:/' / `'
|
|
c:/ -> `c:/' / `'
|
|
c:foo -> `c:/' / `foo'
|
|
c:/foo -> `c:/' / `foo'
|
|
*/
|
|
|
|
extern "C" void
|
|
cygwin_split_path (const char *path, char *dir, char *file)
|
|
{
|
|
int dir_started_p = 0;
|
|
|
|
/* Deal with drives.
|
|
Remember that c:foo <==> c:/foo. */
|
|
if (isdrive (path))
|
|
{
|
|
*dir++ = *path++;
|
|
*dir++ = *path++;
|
|
*dir++ = '/';
|
|
if (!*path)
|
|
{
|
|
*dir = 0;
|
|
*file = 0;
|
|
return;
|
|
}
|
|
if (isdirsep (*path))
|
|
++path;
|
|
dir_started_p = 1;
|
|
}
|
|
|
|
/* Determine if there are trailing slashes and "delete" them if present.
|
|
We pretend as if they don't exist. */
|
|
const char *end = path + strlen (path);
|
|
/* path + 1: keep leading slash. */
|
|
while (end > path + 1 && isdirsep (end[-1]))
|
|
--end;
|
|
|
|
/* At this point, END points to one beyond the last character
|
|
(with trailing slashes "deleted"). */
|
|
|
|
/* Point LAST_SLASH at the last slash (duh...). */
|
|
const char *last_slash;
|
|
for (last_slash = end - 1; last_slash >= path; --last_slash)
|
|
if (isdirsep (*last_slash))
|
|
break;
|
|
|
|
if (last_slash == path)
|
|
{
|
|
*dir++ = '/';
|
|
*dir = 0;
|
|
}
|
|
else if (last_slash > path)
|
|
{
|
|
memcpy (dir, path, last_slash - path);
|
|
dir[last_slash - path] = 0;
|
|
}
|
|
else
|
|
{
|
|
if (dir_started_p)
|
|
; /* nothing to do */
|
|
else
|
|
*dir++ = '.';
|
|
*dir = 0;
|
|
}
|
|
|
|
memcpy (file, last_slash + 1, end - last_slash - 1);
|
|
file[end - last_slash - 1] = 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
/* Return the hash value for the current win32 value.
|
|
This is used when constructing inodes. */
|
|
DWORD
|
|
cwdstuff::get_hash ()
|
|
{
|
|
DWORD hashnow;
|
|
cwd_lock.acquire ();
|
|
hashnow = hash;
|
|
cwd_lock.release ();
|
|
return hashnow;
|
|
}
|
|
|
|
/* Initialize cygcwd 'muto' for serializing access to cwd info. */
|
|
void
|
|
cwdstuff::init ()
|
|
{
|
|
cwd_lock.init ("cwd_lock");
|
|
}
|
|
|
|
/* Get initial cwd. Should only be called once in a
|
|
process tree. */
|
|
bool
|
|
cwdstuff::get_initial ()
|
|
{
|
|
cwd_lock.acquire ();
|
|
|
|
if (win32)
|
|
return 1;
|
|
|
|
/* Leaves cwd lock unreleased, if success */
|
|
return !set (NULL, NULL, false);
|
|
}
|
|
|
|
/* Chdir and fill out the elements of a cwdstuff struct.
|
|
It is assumed that the lock for the cwd is acquired if
|
|
win32_cwd == NULL. */
|
|
int
|
|
cwdstuff::set (const char *win32_cwd, const char *posix_cwd, bool doit)
|
|
{
|
|
char pathbuf[2 * CYG_MAX_PATH];
|
|
int res = -1;
|
|
|
|
if (win32_cwd)
|
|
{
|
|
cwd_lock.acquire ();
|
|
if (doit && !SetCurrentDirectory (win32_cwd))
|
|
{
|
|
__seterrno ();
|
|
goto out;
|
|
}
|
|
}
|
|
/* If there is no win32 path or it has the form c:xxx, get the value */
|
|
if (!win32_cwd || (isdrive (win32_cwd) && win32_cwd[2] != '\\'))
|
|
{
|
|
int i;
|
|
DWORD len, dlen;
|
|
for (i = 0, dlen = CYG_MAX_PATH/3; i < 2; i++, dlen = len)
|
|
{
|
|
win32 = (char *) crealloc (win32, dlen);
|
|
if ((len = GetCurrentDirectoryA (dlen, win32)) < dlen)
|
|
break;
|
|
}
|
|
if (len == 0)
|
|
{
|
|
__seterrno ();
|
|
debug_printf ("GetCurrentDirectory, %E");
|
|
win32_cwd = pathbuf; /* Force lock release */
|
|
goto out;
|
|
}
|
|
posix_cwd = NULL;
|
|
}
|
|
else
|
|
{
|
|
win32 = (char *) crealloc (win32, strlen (win32_cwd) + 1);
|
|
strcpy (win32, win32_cwd);
|
|
}
|
|
if (win32[1] == ':')
|
|
drive_length = 2;
|
|
else if (win32[1] == '\\')
|
|
{
|
|
char * ptr = strechr (win32 + 2, '\\');
|
|
if (*ptr)
|
|
ptr = strechr (ptr + 1, '\\');
|
|
drive_length = ptr - win32;
|
|
}
|
|
else
|
|
drive_length = 0;
|
|
|
|
if (!posix_cwd)
|
|
{
|
|
mount_table->conv_to_posix_path (win32, pathbuf, 0);
|
|
posix_cwd = pathbuf;
|
|
}
|
|
posix = (char *) crealloc (posix, strlen (posix_cwd) + 1);
|
|
strcpy (posix, posix_cwd);
|
|
|
|
hash = hash_path_name (0, win32);
|
|
|
|
res = 0;
|
|
out:
|
|
if (win32_cwd)
|
|
cwd_lock.release ();
|
|
return res;
|
|
}
|
|
|
|
/* Copy the value for either the posix or the win32 cwd into a buffer. */
|
|
char *
|
|
cwdstuff::get (char *buf, int need_posix, int with_chroot, unsigned ulen)
|
|
{
|
|
MALLOC_CHECK;
|
|
|
|
if (ulen)
|
|
/* nothing */;
|
|
else if (buf == NULL)
|
|
ulen = (unsigned) -1;
|
|
else
|
|
{
|
|
set_errno (EINVAL);
|
|
goto out;
|
|
}
|
|
|
|
if (!get_initial ()) /* Get initial cwd and set cwd lock */
|
|
return NULL;
|
|
|
|
char *tocopy;
|
|
if (!need_posix)
|
|
tocopy = win32;
|
|
else
|
|
tocopy = posix;
|
|
|
|
debug_printf ("posix %s", posix);
|
|
if (strlen (tocopy) >= ulen)
|
|
{
|
|
set_errno (ERANGE);
|
|
buf = NULL;
|
|
}
|
|
else
|
|
{
|
|
if (!buf)
|
|
buf = (char *) malloc (strlen (tocopy) + 1);
|
|
strcpy (buf, tocopy);
|
|
if (!buf[0]) /* Should only happen when chroot */
|
|
strcpy (buf, "/");
|
|
}
|
|
|
|
cwd_lock.release ();
|
|
|
|
out:
|
|
syscall_printf ("(%s) = cwdstuff::get (%p, %d, %d, %d), errno %d",
|
|
buf, buf, ulen, need_posix, with_chroot, errno);
|
|
MALLOC_CHECK;
|
|
return buf;
|
|
}
|
|
|
|
int etc::curr_ix = 0;
|
|
/* Note that the first elements of the below arrays are unused */
|
|
bool etc::change_possible[MAX_ETC_FILES + 1];
|
|
const char *etc::fn[MAX_ETC_FILES + 1];
|
|
FILETIME etc::last_modified[MAX_ETC_FILES + 1];
|
|
|
|
int
|
|
etc::init (int n, const char *etc_fn)
|
|
{
|
|
if (n > 0)
|
|
/* ok */;
|
|
else if (++curr_ix <= MAX_ETC_FILES)
|
|
n = curr_ix;
|
|
else
|
|
api_fatal ("internal error");
|
|
|
|
fn[n] = etc_fn;
|
|
change_possible[n] = false;
|
|
(void) test_file_change (n);
|
|
paranoid_printf ("fn[%d] %s, curr_ix %d", n, fn[n], curr_ix);
|
|
return n;
|
|
}
|
|
|
|
bool
|
|
etc::test_file_change (int n)
|
|
{
|
|
HANDLE h;
|
|
WIN32_FIND_DATA data;
|
|
bool res;
|
|
|
|
if ((h = FindFirstFile (fn[n], &data)) == INVALID_HANDLE_VALUE)
|
|
{
|
|
res = true;
|
|
memset (last_modified + n, 0, sizeof (last_modified[n]));
|
|
debug_printf ("FindFirstFile failed, %E");
|
|
}
|
|
else
|
|
{
|
|
FindClose (h);
|
|
res = CompareFileTime (&data.ftLastWriteTime, last_modified + n) > 0;
|
|
last_modified[n] = data.ftLastWriteTime;
|
|
debug_printf ("FindFirstFile succeeded");
|
|
}
|
|
|
|
paranoid_printf ("fn[%d] %s res %d", n, fn[n], res);
|
|
return res;
|
|
}
|
|
|
|
bool
|
|
etc::dir_changed (int n)
|
|
{
|
|
if (!change_possible[n])
|
|
{
|
|
static HANDLE changed_h NO_COPY;
|
|
|
|
if (!changed_h)
|
|
{
|
|
path_conv pwd ("/etc");
|
|
changed_h = FindFirstChangeNotification (pwd, FALSE,
|
|
FILE_NOTIFY_CHANGE_LAST_WRITE
|
|
| FILE_NOTIFY_CHANGE_FILE_NAME);
|
|
#ifdef DEBUGGING
|
|
if (changed_h == INVALID_HANDLE_VALUE)
|
|
system_printf ("Can't open %s for checking, %E", (char *) pwd);
|
|
#endif
|
|
memset (change_possible, true, sizeof (change_possible));
|
|
}
|
|
|
|
if (changed_h == INVALID_HANDLE_VALUE)
|
|
change_possible[n] = true;
|
|
else if (WaitForSingleObject (changed_h, 0) == WAIT_OBJECT_0)
|
|
{
|
|
(void) FindNextChangeNotification (changed_h);
|
|
memset (change_possible, true, sizeof change_possible);
|
|
}
|
|
}
|
|
|
|
paranoid_printf ("fn[%d] %s change_possible %d", n, fn[n], change_possible[n]);
|
|
return change_possible[n];
|
|
}
|
|
|
|
bool
|
|
etc::file_changed (int n)
|
|
{
|
|
bool res = false;
|
|
if (dir_changed (n) && test_file_change (n))
|
|
res = true;
|
|
change_possible[n] = false; /* Change is no longer possible */
|
|
paranoid_printf ("fn[%d] %s res %d", n, fn[n], res);
|
|
return res;
|
|
}
|
|
|
|
/* No need to be reentrant or thread-safe according to SUSv3.
|
|
/ and \\ are treated equally. Leading drive specifiers are
|
|
kept intact as far as it makes sense. Everything else is
|
|
POSIX compatible. */
|
|
extern "C" char *
|
|
basename (char *path)
|
|
{
|
|
static char buf[CYG_MAX_PATH];
|
|
char *c, *d, *bs = buf;
|
|
|
|
if (!path || !*path)
|
|
return strcpy (buf, ".");
|
|
strncpy (buf, path, CYG_MAX_PATH);
|
|
if (isalpha (buf[0]) && buf[1] == ':')
|
|
bs += 2;
|
|
else if (strspn (buf, "/\\") > 1)
|
|
++bs;
|
|
c = strrchr (bs, '/');
|
|
if ((d = strrchr (c ?: bs, '\\')) > c)
|
|
c = d;
|
|
if (c)
|
|
{
|
|
/* Trailing (back)slashes are eliminated. */
|
|
while (c && c > bs && c[1] == '\0')
|
|
{
|
|
*c = '\0';
|
|
c = strrchr (bs, '/');
|
|
if ((d = strrchr (c ?: bs, '\\')) > c)
|
|
c = d;
|
|
}
|
|
if (c && (c > bs || c[1]))
|
|
return c + 1;
|
|
}
|
|
else if (!bs[0])
|
|
strcpy (bs, ".");
|
|
return buf;
|
|
}
|
|
|
|
/* No need to be reentrant or thread-safe according to SUSv3.
|
|
/ and \\ are treated equally. Leading drive specifiers and
|
|
leading double (back)slashes are kept intact as far as it
|
|
makes sense. Everything else is POSIX compatible. */
|
|
extern "C" char *
|
|
dirname (char *path)
|
|
{
|
|
static char buf[CYG_MAX_PATH];
|
|
char *c, *d, *bs = buf;
|
|
|
|
if (!path || !*path)
|
|
return strcpy (buf, ".");
|
|
strncpy (buf, path, CYG_MAX_PATH);
|
|
if (isalpha (buf[0]) && buf[1] == ':')
|
|
bs += 2;
|
|
else if (strspn (buf, "/\\") > 1)
|
|
++bs;
|
|
c = strrchr (bs, '/');
|
|
if ((d = strrchr (c ?: bs, '\\')) > c)
|
|
c = d;
|
|
if (c)
|
|
{
|
|
/* Trailing (back)slashes are eliminated. */
|
|
while (c && c > bs && c[1] == '\0')
|
|
{
|
|
*c = '\0';
|
|
c = strrchr (bs, '/');
|
|
if ((d = strrchr (c ?: bs, '\\')) > c)
|
|
c = d;
|
|
}
|
|
if (!c)
|
|
strcpy (bs, ".");
|
|
else if (c > bs)
|
|
{
|
|
/* More trailing (back)slashes are eliminated. */
|
|
while (c > bs && (*c == '/' || *c == '\\'))
|
|
*c-- = '\0';
|
|
}
|
|
else
|
|
c[1] = '\0';
|
|
}
|
|
else
|
|
strcpy (bs, ".");
|
|
return buf;
|
|
}
|