349 lines
10 KiB
C++
349 lines
10 KiB
C++
/* path.h: path data structures
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Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
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2006, 2007 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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#include "devices.h"
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#define isproc_dev(devn) \
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(devn == FH_PROC || devn == FH_REGISTRY || devn == FH_PROCESS || \
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devn == FH_PROCNET)
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#define isvirtual_dev(devn) \
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(isproc_dev (devn) || devn == FH_CYGDRIVE || devn == FH_NETDRIVE)
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inline bool
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has_attribute (DWORD attributes, DWORD attribs_to_test)
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{
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return attributes != INVALID_FILE_ATTRIBUTES
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&& (attributes & attribs_to_test);
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}
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enum executable_states
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{
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is_executable,
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dont_care_if_executable,
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not_executable = dont_care_if_executable,
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dont_know_if_executable
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};
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struct suffix_info
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{
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const char *name;
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int addon;
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suffix_info (const char *s, int addit = 0): name (s), addon (addit) {}
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};
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extern suffix_info stat_suffixes[];
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enum pathconv_arg
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{
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PC_SYM_FOLLOW = 0x0001,
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PC_SYM_NOFOLLOW = 0x0002,
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PC_SYM_IGNORE = 0x0004,
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PC_SYM_CONTENTS = 0x0008,
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PC_NOFULL = 0x0010,
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PC_NULLEMPTY = 0x0020,
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PC_CHECK_EA = 0x0040,
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PC_POSIX = 0x0080,
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PC_NOWARN = 0x0100,
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PC_NO_ACCESS_CHECK = 0x00800000
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};
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enum case_checking
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{
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PCHECK_RELAXED = 0,
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PCHECK_ADJUST = 1,
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PCHECK_STRICT = 2
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};
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#define PC_NONULLEMPTY -1
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#include "sys/mount.h"
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enum path_types
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{
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PATH_NOTHING = 0,
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PATH_SYMLINK = MOUNT_SYMLINK,
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PATH_BINARY = MOUNT_BINARY,
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PATH_EXEC = MOUNT_EXEC,
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PATH_NOTEXEC = MOUNT_NOTEXEC,
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PATH_CYGWIN_EXEC = MOUNT_CYGWIN_EXEC,
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PATH_ENC = MOUNT_ENC,
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PATH_RO = MOUNT_RO,
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PATH_ALL_EXEC = (PATH_CYGWIN_EXEC | PATH_EXEC),
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PATH_NO_ACCESS_CHECK = PC_NO_ACCESS_CHECK,
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PATH_LNK = 0x01000000,
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PATH_TEXT = 0x02000000,
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PATH_REP = 0x04000000,
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PATH_HAS_SYMLINKS = 0x10000000,
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PATH_SOCKET = 0x40000000
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};
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class symlink_info;
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struct fs_info
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{
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private:
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struct status_flags
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{
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DWORD flags; /* Volume flags */
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DWORD samba_version; /* Samba version if available */
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unsigned is_remote_drive : 1;
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unsigned has_buggy_open : 1;
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unsigned has_acls : 1;
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unsigned hasgood_inode : 1;
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unsigned is_fat : 1;
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unsigned is_ntfs : 1;
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unsigned is_samba : 1;
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unsigned is_nfs : 1;
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unsigned is_netapp : 1;
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unsigned is_cdrom : 1;
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} status;
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public:
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void clear () { memset (&status, 0 , sizeof status); }
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fs_info () { clear (); }
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IMPLEMENT_STATUS_FLAG (DWORD, flags)
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IMPLEMENT_STATUS_FLAG (DWORD, samba_version)
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IMPLEMENT_STATUS_FLAG (bool, is_remote_drive)
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IMPLEMENT_STATUS_FLAG (bool, has_buggy_open)
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IMPLEMENT_STATUS_FLAG (bool, has_acls)
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IMPLEMENT_STATUS_FLAG (bool, hasgood_inode)
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IMPLEMENT_STATUS_FLAG (bool, is_fat)
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IMPLEMENT_STATUS_FLAG (bool, is_ntfs)
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IMPLEMENT_STATUS_FLAG (bool, is_samba)
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IMPLEMENT_STATUS_FLAG (bool, is_nfs)
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IMPLEMENT_STATUS_FLAG (bool, is_netapp)
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IMPLEMENT_STATUS_FLAG (bool, is_cdrom)
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bool update (PUNICODE_STRING, bool) __attribute__ ((regparm (3)));
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};
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class path_conv
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{
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DWORD fileattr;
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fs_info fs;
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PWCHAR wide_path;
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UNICODE_STRING uni_path;
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void add_ext_from_sym (symlink_info&);
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public:
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unsigned path_flags;
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char *known_suffix;
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int error;
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device dev;
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bool case_clash;
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bool isremote () const {return fs.is_remote_drive ();}
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bool has_acls () const {return fs.has_acls (); }
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bool hasgood_inode () const {return fs.hasgood_inode (); }
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bool isgood_inode (__ino64_t ino) const;
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int has_symlinks () const {return path_flags & PATH_HAS_SYMLINKS;}
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int has_buggy_open () const {return fs.has_buggy_open ();}
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bool isencoded () const {return path_flags & PATH_ENC;}
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int binmode () const
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{
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if (path_flags & PATH_BINARY)
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return O_BINARY;
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if (path_flags & PATH_TEXT)
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return O_TEXT;
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return 0;
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}
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int issymlink () const {return path_flags & PATH_SYMLINK;}
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int is_lnk_symlink () const {return path_flags & PATH_LNK;}
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int is_rep_symlink () const {return path_flags & PATH_REP;}
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int isdevice () const {return dev.devn && dev.devn != FH_FS && dev.devn != FH_FIFO;}
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int isfifo () const {return dev == FH_FIFO;}
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int isspecial () const {return dev.devn && dev.devn != FH_FS;}
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int iscygdrive () const {return dev.devn == FH_CYGDRIVE;}
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int is_auto_device () const {return isdevice () && !is_fs_special ();}
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int is_fs_device () const {return isdevice () && is_fs_special ();}
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int is_fs_special () const {return dev.is_fs_special ();}
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int is_lnk_special () const {return is_fs_device () || isfifo () || is_lnk_symlink ();}
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int issocket () const {return dev.devn == FH_UNIX;}
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int iscygexec () const {return path_flags & PATH_CYGWIN_EXEC;}
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void set_cygexec (bool isset)
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{
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if (isset)
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path_flags |= PATH_CYGWIN_EXEC;
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else
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path_flags &= ~PATH_CYGWIN_EXEC;
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}
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bool isro () const {return !!(path_flags & PATH_RO);}
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bool exists () const {return fileattr != INVALID_FILE_ATTRIBUTES;}
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bool has_attribute (DWORD x) const {return exists () && (fileattr & x);}
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int isdir () const {return has_attribute (FILE_ATTRIBUTE_DIRECTORY);}
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executable_states exec_state ()
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{
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extern int _check_for_executable;
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if (path_flags & PATH_ALL_EXEC)
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return is_executable;
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if (path_flags & PATH_NOTEXEC)
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return not_executable;
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if (!_check_for_executable)
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return dont_care_if_executable;
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return dont_know_if_executable;
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}
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void set_binary () {path_flags |= PATH_BINARY;}
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void set_symlink (DWORD n) {path_flags |= PATH_SYMLINK; symlink_length = n;}
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void set_has_symlinks () {path_flags |= PATH_HAS_SYMLINKS;}
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void set_exec (int x = 1) {path_flags |= x ? PATH_EXEC : PATH_NOTEXEC;}
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void check (const UNICODE_STRING *upath, unsigned opt = PC_SYM_FOLLOW,
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const suffix_info *suffixes = NULL) __attribute__ ((regparm(3)));
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void check (const char *src, unsigned opt = PC_SYM_FOLLOW,
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const suffix_info *suffixes = NULL) __attribute__ ((regparm(3)));
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path_conv (const device& in_dev): fileattr (INVALID_FILE_ATTRIBUTES),
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wide_path (NULL), path_flags (0), known_suffix (NULL), error (0),
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dev (in_dev)
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{
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strcpy (path, in_dev.native);
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}
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path_conv (int, const char *src, unsigned opt = PC_SYM_FOLLOW,
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const suffix_info *suffixes = NULL)
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{
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check (src, opt, suffixes);
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}
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path_conv (const UNICODE_STRING *src, unsigned opt = PC_SYM_FOLLOW,
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const suffix_info *suffixes = NULL)
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{
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check (src, opt | PC_NULLEMPTY, suffixes);
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}
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path_conv (const char *src, unsigned opt = PC_SYM_FOLLOW,
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const suffix_info *suffixes = NULL)
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{
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check (src, opt | PC_NULLEMPTY, suffixes);
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}
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path_conv (): fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL),
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path_flags (0), known_suffix (NULL), error (0),
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normalized_path (NULL)
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{path[0] = '\0';}
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~path_conv ();
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inline char *get_win32 () { return path; }
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PUNICODE_STRING get_nt_native_path ();
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POBJECT_ATTRIBUTES get_object_attr (OBJECT_ATTRIBUTES &attr,
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SECURITY_ATTRIBUTES &sa);
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inline size_t get_wide_win32_path_len ()
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{
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get_nt_native_path ();
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return uni_path.Length / sizeof (WCHAR);
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}
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PWCHAR get_wide_win32_path (PWCHAR wc);
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operator DWORD &() {return fileattr;}
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operator int () {return fileattr; }
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path_conv &operator =(path_conv &pc)
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{
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memcpy (this, &pc, pc.size ());
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set_normalized_path (pc.normalized_path, false);
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wide_path = NULL;
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return *this;
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}
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DWORD get_devn () const {return dev.devn;}
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short get_unitn () const {return dev.minor;}
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DWORD file_attributes () const {return fileattr;}
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void file_attributes (DWORD new_attr) {fileattr = new_attr;}
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DWORD fs_flags () {return fs.flags ();}
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bool fs_is_fat () const {return fs.is_fat ();}
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bool fs_is_ntfs () const {return fs.is_ntfs ();}
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bool fs_is_samba () const {return fs.is_samba ();}
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bool fs_is_nfs () const {return fs.is_nfs ();}
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bool fs_is_netapp () const {return fs.is_netapp ();}
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bool fs_is_cdrom () const {return fs.is_cdrom ();}
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void set_path (const char *p) {strcpy (path, p);}
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void fillin (HANDLE h);
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inline size_t size ()
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{
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return (sizeof (*this) - sizeof (path)) + strlen (path) + 1 + normalized_path_size;
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}
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bool is_binary ();
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unsigned __stdcall ndisk_links (DWORD);
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char *normalized_path;
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size_t normalized_path_size;
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void set_normalized_path (const char *, bool) __attribute__ ((regparm (3)));
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DWORD get_symlink_length () { return symlink_length; };
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private:
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DWORD symlink_length;
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char path[NT_MAX_PATH];
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};
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/* Symlink marker */
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#define SYMLINK_COOKIE "!<symlink>"
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/* Socket marker */
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#define SOCKET_COOKIE "!<socket >"
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int __stdcall slash_unc_prefix_p (const char *path) __attribute__ ((regparm(1)));
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enum fe_types
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{
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FE_NADA = 0, /* Nothing special */
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FE_NNF = 1, /* Return NULL if not found */
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FE_NATIVE = 2, /* Return native path in path_conv struct */
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FE_CWD = 4, /* Search CWD for program */
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FE_DLL = 8 /* Search for DLLs, not executables. */
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};
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const char *__stdcall find_exec (const char *name, path_conv& buf,
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const char *winenv = "PATH=",
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unsigned opt = FE_NADA,
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const char **known_suffix = NULL)
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__attribute__ ((regparm(3)));
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/* Common macros for checking for invalid path names */
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#define isdrive(s) (isalpha (*(s)) && (s)[1] == ':')
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#define iswdrive(s) (iswalpha (*(s)) && (s)[1] == L':')
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static inline bool
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has_exec_chars (const char *buf, int len)
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{
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return len >= 2 &&
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((buf[0] == '#' && buf[1] == '!') ||
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(buf[0] == ':' && buf[1] == '\n') ||
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(buf[0] == 'M' && buf[1] == 'Z'));
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}
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int pathmatch (const char *path1, const char *path2) __attribute__ ((regparm (2)));
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int pathnmatch (const char *path1, const char *path2, int len) __attribute__ ((regparm (2)));
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bool has_dot_last_component (const char *dir, bool test_dot_dot) __attribute__ ((regparm (2)));
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bool fnunmunge (char *, const char *) __attribute__ ((regparm (2)));
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int path_prefix_p (const char *path1, const char *path2, int len1) __attribute__ ((regparm (3)));
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bool is_floppy (const char *);
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/* FIXME: Move to own include file eventually */
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#define MAX_ETC_FILES 2
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class etc
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{
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friend class dtable;
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static int curr_ix;
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static HANDLE changed_h;
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static bool change_possible[MAX_ETC_FILES + 1];
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static OBJECT_ATTRIBUTES fn[MAX_ETC_FILES + 1];
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static LARGE_INTEGER last_modified[MAX_ETC_FILES + 1];
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static bool dir_changed (int);
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static int init (int, PUNICODE_STRING);
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static bool file_changed (int);
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static bool test_file_change (int);
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friend class pwdgrp;
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};
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