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/* libguestfs - shared Windows path for tools
* Copyright (C) 2009-2019 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/**
* This file implements C<win:> Windows file path support in
* L<guestfish(1)>.
*/
#include <config.h>
#include "windows.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <error.h>
#include <locale.h>
#include <langinfo.h>
#include <libintl.h>
#include "guestfs-utils.h"
#include "c-ctype.h"
static void mount_drive_letter (guestfs_h *g, char drive_letter,
const char *root, int readonly);
/**
* Checks whether C<root> is a Windows installation.
*
* This relies on an already being done introspection.
*/
int
is_windows (guestfs_h *g, const char *root)
{
int w;
CLEANUP_FREE char *type = guestfs_inspect_get_type (g, root);
if (!type)
return 0;
w = STREQ (type, "windows");
return w;
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
/**
* Resolves C<path> as possible Windows path according to C<root>,
* giving a new path that can be used in libguestfs API calls.
*
* Notes:
*
* =over 4
*
* =item *
*
* C<root> must be a Windows installation
*
* =item *
*
* relies on an already being done introspection
*
* =item *
*
* will unmount all the existing mount points and mount the Windows root
* (according to C<readonly>)
*
* =item *
*
* calls L<exit(3)> on memory allocation failures
*
* =back
*/
char *
windows_path (guestfs_h *g, const char *root, const char *path, int readonly)
{
char *ret;
size_t i;
/* If there is a drive letter, rewrite the path. */
if (c_isalpha (path[0]) && path[1] == ':') {
char drive_letter = c_tolower (path[0]);
/* This returns the newly allocated string. */
mount_drive_letter (g, drive_letter, root, readonly);
ret = strdup (path + 2);
if (ret == NULL)
error (EXIT_FAILURE, errno, "strdup");
}
else if (!*path) {
ret = strdup ("/");
if (ret == NULL)
error (EXIT_FAILURE, errno, "strdup");
}
else {
ret = strdup (path);
if (ret == NULL)
error (EXIT_FAILURE, errno, "strdup");
}
/* Blindly convert any backslashes into forward slashes. Is this good? */
for (i = 0; i < strlen (ret); ++i)
if (ret[i] == '\\')
ret[i] = '/';
/* If this fails, we want to return NULL. */
char *t = guestfs_case_sensitive_path (g, ret);
free (ret);
ret = t;
return ret;
}
#pragma GCC diagnostic pop
static void
mount_drive_letter (guestfs_h *g, char drive_letter, const char *root,
int readonly)
{
char *device;
size_t i;
/* Resolve the drive letter using the drive mappings table. */
CLEANUP_FREE_STRING_LIST char **drives =
guestfs_inspect_get_drive_mappings (g, root);
if (drives == NULL || drives[0] == NULL)
error (EXIT_FAILURE, 0,
_("to use Windows drive letters, this must be a Windows guest"));
device = NULL;
for (i = 0; drives[i] != NULL; i += 2) {
if (c_tolower (drives[i][0]) == drive_letter && drives[i][1] == '\0') {
device = drives[i+1];
break;
}
}
if (device == NULL)
error (EXIT_FAILURE, 0, _("drive '%c:' not found."), drive_letter);
/* Unmount current disk and remount device. */
if (guestfs_umount_all (g) == -1)
exit (EXIT_FAILURE);
if ((readonly ? guestfs_mount_ro : guestfs_mount) (g, device, "/") == -1)
exit (EXIT_FAILURE);
/* Don't need to free (device) because that string was in the
* drives array.
*/
}
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