879 lines
22 KiB
C++
879 lines
22 KiB
C++
/* fhandler_disk_file.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 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 "winsup.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/cygwin.h>
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#include <signal.h>
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#include "cygerrno.h"
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#include "perprocess.h"
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#include "security.h"
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#include "cygwin/version.h"
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#include "path.h"
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#include "fhandler.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 "pinfo.h"
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#include <assert.h>
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#include <ctype.h>
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#define _COMPILING_NEWLIB
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#include <dirent.h>
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unsigned __stdcall
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path_conv::ndisk_links (DWORD nNumberOfLinks)
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{
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if (!isdir () || isremote ())
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return nNumberOfLinks;
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int len = strlen (*this);
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char fn[len + 3];
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strcpy (fn, *this);
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const char *s;
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unsigned count;
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if (nNumberOfLinks <= 1)
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{
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s = "/*";
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count = 0;
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}
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else
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{
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s = "/..";
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count = nNumberOfLinks;
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}
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if (len == 0 || isdirsep (fn[len - 1]))
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strcpy (fn + len, s + 1);
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else
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strcpy (fn + len, s);
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WIN32_FIND_DATA buf;
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HANDLE h = FindFirstFile (fn, &buf);
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int saw_dot = 2;
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if (h != INVALID_HANDLE_VALUE)
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{
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if (nNumberOfLinks > 1)
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saw_dot--;
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else
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do
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{
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if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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count++;
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if (buf.cFileName[0] == '.'
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&& (buf.cFileName[1] == '\0'
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|| (buf.cFileName[1] == '.' && buf.cFileName[2] == '\0')))
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saw_dot--;
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}
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while (FindNextFileA (h, &buf));
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FindClose (h);
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}
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if (nNumberOfLinks > 1)
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{
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fn[len + 2] = '\0';
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h = FindFirstFile (fn, &buf);
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if (h)
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saw_dot--;
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FindClose (h);
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}
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return count + saw_dot;
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}
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int __stdcall
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fhandler_base::fstat_by_handle (struct __stat64 *buf)
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{
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int res = 0;
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BY_HANDLE_FILE_INFORMATION local;
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/* NT 3.51 seems to have a bug when attempting to get vol serial
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numbers. This loop gets around this. */
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for (int i = 0; i < 2; i++)
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{
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if (!(res = GetFileInformationByHandle (get_handle (), &local)))
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break;
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if (local.dwVolumeSerialNumber && (long) local.dwVolumeSerialNumber != -1)
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break;
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}
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debug_printf ("%d = GetFileInformationByHandle (%s, %d)",
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res, get_win32_name (), get_handle ());
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if (res == 0)
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/* GetFileInformationByHandle will fail if it's given stdin/out/err
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or a pipe*/
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{
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memset (&local, 0, sizeof (local));
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local.nFileSizeLow = GetFileSize (get_handle (), &local.nFileSizeHigh);
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}
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return fstat_helper (buf,
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local.ftCreationTime,
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local.ftLastAccessTime,
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local.ftLastWriteTime,
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local.nFileSizeHigh,
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local.nFileSizeLow,
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local.nFileIndexHigh,
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local.nFileIndexLow,
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local.nNumberOfLinks);
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}
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int __stdcall
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fhandler_base::fstat_by_name (struct __stat64 *buf)
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{
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int res;
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HANDLE handle;
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WIN32_FIND_DATA local;
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if (!pc.exists ())
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{
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debug_printf ("already determined that pc does not exist");
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set_errno (ENOENT);
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res = -1;
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}
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else if ((handle = FindFirstFile (pc, &local)) != INVALID_HANDLE_VALUE)
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{
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FindClose (handle);
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res = fstat_helper (buf,
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local.ftCreationTime,
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local.ftLastAccessTime,
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local.ftLastWriteTime,
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local.nFileSizeHigh,
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local.nFileSizeLow);
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}
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else if (pc.isdir ())
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{
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FILETIME ft = {};
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res = fstat_helper (buf, ft, ft, ft, 0, 0);
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}
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else
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{
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debug_printf ("FindFirstFile failed for '%s', %E", (char *) pc);
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__seterrno ();
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res = -1;
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}
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return res;
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}
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int __stdcall
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fhandler_base::fstat_fs (struct __stat64 *buf)
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{
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int res = -1;
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int oret;
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int open_flags = O_RDONLY | O_BINARY | O_DIROPEN;
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bool query_open_already;
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if (get_io_handle ())
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{
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if (get_nohandle ())
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return fstat_by_name (buf);
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else
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return fstat_by_handle (buf);
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}
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/* If we don't care if the file is executable or we already know if it is,
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then just do a "query open" as it is apparently much faster. */
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if (pc.exec_state () != dont_know_if_executable)
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set_query_open (query_open_already = true);
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else
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query_open_already = false;
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if (query_open_already && strncasematch (pc.volname (), "FAT", 3)
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&& !strpbrk (get_win32_name (), "?*|<>"))
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oret = 0;
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else if (!(oret = open_fs (open_flags, 0))
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&& !query_open_already
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&& get_errno () == EACCES)
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{
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/* If we couldn't open the file, try a "query open" with no permissions.
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This will allow us to determine *some* things about the file, at least. */
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pc.set_exec (0);
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set_query_open (true);
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oret = open_fs (open_flags, 0);
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}
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if (!oret || get_nohandle ())
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res = fstat_by_name (buf);
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else
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{
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res = fstat_by_handle (buf);
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close_fs ();
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}
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return res;
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}
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int __stdcall
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fhandler_base::fstat_helper (struct __stat64 *buf,
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FILETIME ftCreationTime,
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FILETIME ftLastAccessTime,
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FILETIME ftLastWriteTime,
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DWORD nFileSizeHigh,
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DWORD nFileSizeLow,
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DWORD nFileIndexHigh,
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DWORD nFileIndexLow,
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DWORD nNumberOfLinks)
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{
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/* This is for FAT filesystems, which don't support atime/ctime */
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if (ftLastAccessTime.dwLowDateTime == 0
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&& ftLastAccessTime.dwHighDateTime == 0)
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ftLastAccessTime = ftLastWriteTime;
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if (ftCreationTime.dwLowDateTime == 0
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&& ftCreationTime.dwHighDateTime == 0)
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ftCreationTime = ftLastWriteTime;
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to_timestruc_t (&ftLastAccessTime, &buf->st_atim);
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to_timestruc_t (&ftLastWriteTime, &buf->st_mtim);
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to_timestruc_t (&ftCreationTime, &buf->st_ctim);
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buf->st_dev = pc.volser ();
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buf->st_size = ((_off64_t) nFileSizeHigh << 32) + nFileSizeLow;
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/* The number of links to a directory includes the
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number of subdirectories in the directory, since all
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those subdirectories point to it.
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This is too slow on remote drives, so we do without it.
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Setting the count to 2 confuses `find (1)' command. So
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let's try it with `1' as link count. */
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buf->st_nlink = pc.ndisk_links (nNumberOfLinks);
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/* Assume that if a drive has ACL support it MAY have valid "inodes".
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It definitely does not have valid inodes if it does not have ACL
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support. */
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switch (pc.has_acls () && (nFileIndexHigh || nFileIndexLow)
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? pc.drive_type () : DRIVE_UNKNOWN)
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{
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case DRIVE_FIXED:
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case DRIVE_REMOVABLE:
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case DRIVE_CDROM:
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case DRIVE_RAMDISK:
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/* Although the documentation indicates otherwise, it seems like
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"inodes" on these devices are persistent, at least across reboots. */
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buf->st_ino = (((__ino64_t) nFileIndexHigh) << 32)
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| (__ino64_t) nFileIndexLow;
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break;
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default:
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/* Either the nFileIndex* fields are unreliable or unavailable. Use the
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next best alternative. */
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buf->st_ino = get_namehash ();
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break;
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}
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buf->st_blksize = S_BLKSIZE;
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/* GetCompressedFileSize() gets autoloaded. It returns INVALID_FILE_SIZE
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if it doesn't exist. Since that's also a valid return value on 64bit
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capable file systems, we must additionally check for the win32 error. */
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nFileSizeLow = GetCompressedFileSizeA (pc, &nFileSizeHigh);
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if (nFileSizeLow != INVALID_FILE_SIZE || GetLastError () == NO_ERROR)
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/* On systems supporting compressed (and sparsed) files,
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GetCompressedFileSize() returns the actual amount of
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bytes allocated on disk. */
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buf->st_blocks = (((_off64_t)nFileSizeHigh << 32)
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+ nFileSizeLow + S_BLKSIZE - 1) / S_BLKSIZE;
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else
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/* Just compute no. of blocks from file size. */
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buf->st_blocks = (buf->st_size + S_BLKSIZE - 1) / S_BLKSIZE;
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buf->st_mode = 0;
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/* Using a side effect: get_file_attibutes checks for
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directory. This is used, to set S_ISVTX, if needed. */
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if (pc.isdir ())
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buf->st_mode = S_IFDIR;
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else if (pc.issymlink ())
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{
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/* symlinks are everything for everyone! */
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buf->st_mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
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get_file_attribute (pc.has_acls (), get_win32_name (), NULL,
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&buf->st_uid, &buf->st_gid);
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goto done;
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}
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else if (pc.issocket ())
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buf->st_mode = S_IFSOCK;
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if (get_file_attribute (pc.has_acls (), get_win32_name (), &buf->st_mode,
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&buf->st_uid, &buf->st_gid) == 0)
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{
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/* If read-only attribute is set, modify ntsec return value */
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if (pc.has_attribute (FILE_ATTRIBUTE_READONLY) && !get_symlink_p ())
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buf->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
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if (!(buf->st_mode & S_IFMT))
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buf->st_mode |= S_IFREG;
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}
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else
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{
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buf->st_mode |= STD_RBITS;
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if (!pc.has_attribute (FILE_ATTRIBUTE_READONLY))
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buf->st_mode |= STD_WBITS;
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/* | S_IWGRP | S_IWOTH; we don't give write to group etc */
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if (S_ISDIR (buf->st_mode))
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buf->st_mode |= S_IFDIR | STD_XBITS;
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else if (buf->st_mode & S_IFMT)
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/* nothing */;
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else if (is_fs_special ())
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{
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buf->st_dev = dev ();
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buf->st_mode = dev ().mode;
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}
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else
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{
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buf->st_mode |= S_IFREG;
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if (pc.exec_state () == dont_know_if_executable)
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{
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DWORD cur, done;
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char magic[3];
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/* First retrieve current position, set to beginning
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of file if not already there. */
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cur = SetFilePointer (get_handle (), 0, NULL, FILE_CURRENT);
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if (cur != INVALID_SET_FILE_POINTER
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&& (!cur || SetFilePointer (get_handle (), 0, NULL, FILE_BEGIN)
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!= INVALID_SET_FILE_POINTER))
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{
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/* FIXME should we use /etc/magic ? */
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magic[0] = magic[1] = magic[2] = '\0';
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if (ReadFile (get_handle (), magic, 3, &done, NULL)
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&& has_exec_chars (magic, done))
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{
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set_execable_p ();
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pc.set_exec ();
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buf->st_mode |= STD_XBITS;
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}
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(void) SetFilePointer (get_handle (), cur, NULL, FILE_BEGIN);
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}
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}
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}
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if (pc.exec_state () == is_executable)
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buf->st_mode |= STD_XBITS;
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/* This fakes the permissions of all files to match the current umask. */
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buf->st_mode &= ~(cygheap->umask);
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}
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done:
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syscall_printf ("0 = fstat (, %p) st_atime=%x st_size=%D, st_mode=%p, st_ino=%d, sizeof=%d",
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buf, buf->st_atime, buf->st_size, buf->st_mode,
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(int) buf->st_ino, sizeof (*buf));
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return 0;
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}
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int __stdcall
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fhandler_disk_file::fstat (struct __stat64 *buf)
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{
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return fstat_fs (buf);
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}
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fhandler_disk_file::fhandler_disk_file () :
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fhandler_base ()
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{
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}
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int
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fhandler_disk_file::open (int flags, mode_t mode)
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{
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return open_fs (flags, mode);
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}
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int
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fhandler_base::open_fs (int flags, mode_t mode)
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{
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if (pc.case_clash && flags & O_CREAT)
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{
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debug_printf ("case clash detected");
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set_errno (ECASECLASH);
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return 0;
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}
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set_has_acls (pc.has_acls ());
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set_isremote (pc.isremote ());
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int res = fhandler_base::open (flags | O_DIROPEN, mode);
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if (!res)
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goto out;
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/* This is for file systems known for having a buggy CreateFile call
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which might return a valid HANDLE without having actually opened
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the file.
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The only known file system to date is the SUN NFS Solstice Client 3.1
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which returns a valid handle when trying to open a file in a nonexistent
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directory. */
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if (pc.has_buggy_open () && !pc.exists ())
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{
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debug_printf ("Buggy open detected.");
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close_fs ();
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set_errno (ENOENT);
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return 0;
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}
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/* Attributes may be set only if a file is _really_ created.
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This code is now only used for ntea here since the files
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security attributes are set in CreateFile () now. */
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if (flags & O_CREAT
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&& GetLastError () != ERROR_ALREADY_EXISTS
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&& !allow_ntsec && allow_ntea)
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set_file_attribute (has_acls (), get_win32_name (), mode);
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set_fs_flags (pc.fs_flags ());
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set_symlink_p (pc.issymlink ());
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set_execable_p (pc.exec_state ());
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set_socket_p (pc.issocket ());
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out:
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syscall_printf ("%d = fhandler_disk_file::open (%s, %p)", res,
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get_win32_name (), flags);
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return res;
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}
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int
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fhandler_disk_file::close ()
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{
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return close_fs ();
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}
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int
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fhandler_base::close_fs ()
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{
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int res = fhandler_base::close ();
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if (!res)
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user_shared->delqueue.process_queue ();
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return res;
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}
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/* FIXME: The correct way to do this to get POSIX locking semantics is to
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keep a linked list of posix lock requests and map them into Win32 locks.
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he problem is that Win32 does not deal correctly with overlapping lock
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requests. Also another pain is that Win95 doesn't do non-blocking or
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non-exclusive locks at all. For '95 just convert all lock requests into
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blocking,exclusive locks. This shouldn't break many apps but denying all
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locking would. For now just convert to Win32 locks and hope for
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the best. */
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int
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fhandler_disk_file::lock (int cmd, struct __flock64 *fl)
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{
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_off64_t win32_start;
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_off64_t win32_len;
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_off64_t startpos;
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/*
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* We don't do getlck calls yet.
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*/
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if (cmd == F_GETLK)
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{
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set_errno (ENOSYS);
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return -1;
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}
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/*
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* Calculate where in the file to start from,
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* then adjust this by fl->l_start.
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*/
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switch (fl->l_whence)
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{
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case SEEK_SET:
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startpos = 0;
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break;
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case SEEK_CUR:
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if ((startpos = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK)
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return -1;
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break;
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case SEEK_END:
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{
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BY_HANDLE_FILE_INFORMATION finfo;
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if (GetFileInformationByHandle (get_handle (), &finfo) == 0)
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{
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__seterrno ();
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return -1;
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}
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startpos = ((_off64_t)finfo.nFileSizeHigh << 32)
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+ finfo.nFileSizeLow;
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break;
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}
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default:
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set_errno (EINVAL);
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return -1;
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}
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/*
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* Now the fun starts. Adjust the start and length
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* fields until they make sense.
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*/
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win32_start = startpos + fl->l_start;
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if (fl->l_len < 0)
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{
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win32_start -= fl->l_len;
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win32_len = -fl->l_len;
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}
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else
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win32_len = fl->l_len;
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if (win32_start < 0)
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{
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/* watch the signs! */
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win32_len -= -win32_start;
|
|
if (win32_len <= 0)
|
|
{
|
|
/* Failure ! */
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
win32_start = 0;
|
|
}
|
|
|
|
DWORD off_high, off_low, len_high, len_low;
|
|
|
|
off_high = (DWORD)(win32_start & 0xffffffff);
|
|
off_low = (DWORD)(win32_start >> 32);
|
|
if (win32_len == 0)
|
|
{
|
|
/* Special case if len == 0 for POSIX means lock to the end of
|
|
the entire file (and all future extensions). */
|
|
len_low = 0xffffffff;
|
|
len_high = wincap.lock_file_highword ();
|
|
}
|
|
else
|
|
{
|
|
len_low = (DWORD)(win32_len & 0xffffffff);
|
|
len_high = (DWORD)(win32_len >> 32);
|
|
}
|
|
|
|
BOOL res;
|
|
|
|
if (wincap.has_lock_file_ex ())
|
|
{
|
|
DWORD lock_flags = (cmd == F_SETLK) ? LOCKFILE_FAIL_IMMEDIATELY : 0;
|
|
lock_flags |= (fl->l_type == F_WRLCK) ? LOCKFILE_EXCLUSIVE_LOCK : 0;
|
|
|
|
OVERLAPPED ov;
|
|
|
|
ov.Internal = 0;
|
|
ov.InternalHigh = 0;
|
|
ov.Offset = off_low;
|
|
ov.OffsetHigh = off_high;
|
|
ov.hEvent = (HANDLE) 0;
|
|
|
|
if (fl->l_type == F_UNLCK)
|
|
{
|
|
res = UnlockFileEx (get_handle (), 0, len_low, len_high, &ov);
|
|
}
|
|
else
|
|
{
|
|
res = LockFileEx (get_handle (), lock_flags, 0,
|
|
len_low, len_high, &ov);
|
|
/* Deal with the fail immediately case. */
|
|
/*
|
|
* FIXME !! I think this is the right error to check for
|
|
* but I must admit I haven't checked....
|
|
*/
|
|
if ((res == 0) && (lock_flags & LOCKFILE_FAIL_IMMEDIATELY) &&
|
|
(GetLastError () == ERROR_LOCK_FAILED))
|
|
{
|
|
set_errno (EAGAIN);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Windows 95 -- use primitive lock call */
|
|
if (fl->l_type == F_UNLCK)
|
|
res = UnlockFile (get_handle (), off_low, off_high, len_low, len_high);
|
|
else
|
|
res = LockFile (get_handle (), off_low, off_high, len_low, len_high);
|
|
}
|
|
|
|
if (res == 0)
|
|
{
|
|
__seterrno ();
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DIR *
|
|
fhandler_disk_file::opendir ()
|
|
{
|
|
DIR *dir;
|
|
DIR *res = NULL;
|
|
size_t len;
|
|
|
|
if (!pc.isdir ())
|
|
set_errno (ENOTDIR);
|
|
else if ((len = strlen (pc))> CYG_MAX_PATH - 3)
|
|
set_errno (ENAMETOOLONG);
|
|
else if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL)
|
|
set_errno (ENOMEM);
|
|
else if ((dir->__d_dirname = (char *) malloc (len + 3)) == NULL)
|
|
{
|
|
set_errno (ENOMEM);
|
|
goto free_dir;
|
|
}
|
|
else if ((dir->__d_dirent =
|
|
(struct dirent *) malloc (sizeof (struct dirent))) == NULL)
|
|
{
|
|
set_errno (ENOMEM);
|
|
goto free_dirname;
|
|
}
|
|
else if (access_worker (pc, R_OK) != 0)
|
|
goto free_dirent;
|
|
else
|
|
{
|
|
strcpy (dir->__d_dirname, get_win32_name ());
|
|
dir->__d_dirent->d_version = __DIRENT_VERSION;
|
|
cygheap_fdnew fd;
|
|
|
|
if (fd < 0)
|
|
goto free_dirent;
|
|
|
|
fd = this;
|
|
fd->set_nohandle (true);
|
|
dir->__d_dirent->d_fd = fd;
|
|
dir->__fh = this;
|
|
/* FindFirstFile doesn't seem to like duplicate /'s. */
|
|
len = strlen (dir->__d_dirname);
|
|
if (len == 0 || isdirsep (dir->__d_dirname[len - 1]))
|
|
strcat (dir->__d_dirname, "*");
|
|
else
|
|
strcat (dir->__d_dirname, "\\*"); /**/
|
|
dir->__d_cookie = __DIRENT_COOKIE;
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
dir->__d_position = 0;
|
|
dir->__d_dirhash = get_namehash ();
|
|
|
|
res = dir;
|
|
|
|
if (pc.isencoded ())
|
|
set_encoded ();
|
|
}
|
|
|
|
syscall_printf ("%p = opendir (%s)", res, get_name ());
|
|
return res;
|
|
|
|
free_dirent:
|
|
free (dir->__d_dirent);
|
|
free_dirname:
|
|
free (dir->__d_dirname);
|
|
free_dir:
|
|
free (dir);
|
|
return res;
|
|
}
|
|
|
|
struct dirent *
|
|
fhandler_disk_file::readdir (DIR *dir)
|
|
{
|
|
WIN32_FIND_DATA buf;
|
|
HANDLE handle;
|
|
struct dirent *res = NULL;
|
|
|
|
if (dir->__handle == INVALID_HANDLE_VALUE
|
|
&& dir->__d_position == 0)
|
|
{
|
|
handle = FindFirstFileA (dir->__d_dirname, &buf);
|
|
DWORD lasterr = GetLastError ();
|
|
dir->__handle = handle;
|
|
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES))
|
|
{
|
|
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
|
|
return res;
|
|
}
|
|
}
|
|
else if (dir->__handle == INVALID_HANDLE_VALUE)
|
|
return res;
|
|
else if (!FindNextFileA (dir->__handle, &buf))
|
|
{
|
|
DWORD lasterr = GetLastError ();
|
|
(void) FindClose (dir->__handle);
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
/* POSIX says you shouldn't set errno when readdir can't
|
|
find any more files; so, if another error we leave it set. */
|
|
if (lasterr != ERROR_NO_MORE_FILES)
|
|
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
|
|
syscall_printf ("%p = readdir (%p)", res, dir);
|
|
return res;
|
|
}
|
|
|
|
/* Check for Windows shortcut. If it's a Cygwin or U/WIN
|
|
symlink, drop the .lnk suffix. */
|
|
if (buf.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
|
|
{
|
|
char *c = buf.cFileName;
|
|
int len = strlen (c);
|
|
if (strcasematch (c + len - 4, ".lnk"))
|
|
{
|
|
char fbuf[CYG_MAX_PATH + 1];
|
|
strcpy (fbuf, dir->__d_dirname);
|
|
strcpy (fbuf + strlen (fbuf) - 1, c);
|
|
path_conv fpath (fbuf, PC_SYM_NOFOLLOW);
|
|
if (fpath.issymlink () || fpath.isspecial ())
|
|
c[len - 4] = '\0';
|
|
}
|
|
}
|
|
|
|
/* We get here if `buf' contains valid data. */
|
|
if (get_encoded ())
|
|
(void) fnunmunge (dir->__d_dirent->d_name, buf.cFileName);
|
|
else
|
|
strcpy (dir->__d_dirent->d_name, buf.cFileName);
|
|
|
|
dir->__d_position++;
|
|
res = dir->__d_dirent;
|
|
syscall_printf ("%p = readdir (%p) (%s)",
|
|
&dir->__d_dirent, dir, buf.cFileName);
|
|
return res;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_disk_file::telldir (DIR *dir)
|
|
{
|
|
return dir->__d_position;
|
|
}
|
|
|
|
void
|
|
fhandler_disk_file::seekdir (DIR *dir, _off64_t loc)
|
|
{
|
|
rewinddir (dir);
|
|
while (loc > dir->__d_position)
|
|
if (!readdir (dir))
|
|
break;
|
|
}
|
|
|
|
void
|
|
fhandler_disk_file::rewinddir (DIR *dir)
|
|
{
|
|
if (dir->__handle != INVALID_HANDLE_VALUE)
|
|
{
|
|
(void) FindClose (dir->__handle);
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
}
|
|
dir->__d_position = 0;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::closedir (DIR *dir)
|
|
{
|
|
int res = 0;
|
|
if (dir->__handle != INVALID_HANDLE_VALUE &&
|
|
FindClose (dir->__handle) == 0)
|
|
{
|
|
__seterrno ();
|
|
res = -1;
|
|
}
|
|
syscall_printf ("%d = closedir (%p)", res, dir);
|
|
return 0;
|
|
}
|
|
|
|
fhandler_cygdrive::fhandler_cygdrive () :
|
|
fhandler_disk_file (), ndrives (0), pdrive (NULL)
|
|
{
|
|
}
|
|
|
|
#define DRVSZ sizeof ("x:\\")
|
|
void
|
|
fhandler_cygdrive::set_drives ()
|
|
{
|
|
const int len = 2 + 26 * DRVSZ;
|
|
char *p = const_cast<char *> (get_win32_name ());
|
|
pdrive = p;
|
|
ndrives = GetLogicalDriveStrings (len, p) / DRVSZ;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::fstat (struct __stat64 *buf)
|
|
{
|
|
if (!iscygdrive_root ())
|
|
return fhandler_disk_file::fstat (buf);
|
|
buf->st_mode = S_IFDIR | 0555;
|
|
if (!ndrives)
|
|
set_drives ();
|
|
buf->st_nlink = ndrives + 2;
|
|
return 0;
|
|
}
|
|
|
|
DIR *
|
|
fhandler_cygdrive::opendir ()
|
|
{
|
|
DIR *dir;
|
|
|
|
dir = fhandler_disk_file::opendir ();
|
|
if (dir && iscygdrive_root () && !ndrives)
|
|
set_drives ();
|
|
|
|
return dir;
|
|
}
|
|
|
|
struct dirent *
|
|
fhandler_cygdrive::readdir (DIR *dir)
|
|
{
|
|
if (!iscygdrive_root ())
|
|
return fhandler_disk_file::readdir (dir);
|
|
if (!pdrive || !*pdrive)
|
|
return NULL;
|
|
if (GetFileAttributes (pdrive) == INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
pdrive = strchr (pdrive, '\0') + 1;
|
|
return readdir (dir);
|
|
}
|
|
|
|
*dir->__d_dirent->d_name = cyg_tolower (*pdrive);
|
|
dir->__d_dirent->d_name[1] = '\0';
|
|
dir->__d_position++;
|
|
pdrive = strchr (pdrive, '\0') + 1;
|
|
syscall_printf ("%p = readdir (%p) (%s)", &dir->__d_dirent, dir,
|
|
dir->__d_dirent->d_name);
|
|
return dir->__d_dirent;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_cygdrive::telldir (DIR *dir)
|
|
{
|
|
return fhandler_disk_file::telldir (dir);
|
|
}
|
|
|
|
void
|
|
fhandler_cygdrive::seekdir (DIR *dir, _off64_t loc)
|
|
{
|
|
if (!iscygdrive_root ())
|
|
return fhandler_disk_file::seekdir (dir, loc);
|
|
|
|
for (pdrive = get_win32_name (), dir->__d_position = -1; *pdrive;
|
|
pdrive = strchr (pdrive, '\0') + 1)
|
|
if (++dir->__d_position >= loc)
|
|
break;
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
fhandler_cygdrive::rewinddir (DIR *dir)
|
|
{
|
|
if (!iscygdrive_root ())
|
|
return fhandler_disk_file::rewinddir (dir);
|
|
pdrive = get_win32_name ();
|
|
dir->__d_position = 0;
|
|
return;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::closedir (DIR *dir)
|
|
{
|
|
if (!iscygdrive_root ())
|
|
return fhandler_disk_file::closedir (dir);
|
|
pdrive = get_win32_name ();
|
|
return -1;
|
|
}
|