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/* libguestfs - guestfish and guestmount shared option parsing
* Copyright (C) 2010 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "c-ctype.h"
#include "guestfs.h"
#include "options.h"
/* Global that saves the root device between inspect_mount and
* print_inspect_prompt.
*/
static char *root = NULL;
static void
free_strings (char **argv)
{
int argc;
for (argc = 0; argv[argc] != NULL; ++argc)
free (argv[argc]);
free (argv);
}
static size_t
count_strings (char *const *argv)
{
size_t i;
for (i = 0; argv[i]; ++i)
;
return i;
}
static int
compare_keys_len (const void *p1, const void *p2)
{
const char *key1 = * (char * const *) p1;
const char *key2 = * (char * const *) p2;
return strlen (key1) - strlen (key2);
}
static int
compare_keys (const void *p1, const void *p2)
{
const char *key1 = * (char * const *) p1;
const char *key2 = * (char * const *) p2;
return strcasecmp (key1, key2);
}
/* This function implements the -i option. */
void
inspect_mount (void)
{
if (live) {
fprintf (stderr, _("%s: don't use --live and -i options together\n"),
program_name);
exit (EXIT_FAILURE);
}
inspect_do_decrypt ();
char **roots = guestfs_inspect_os (g);
if (roots == NULL)
exit (EXIT_FAILURE);
if (roots[0] == NULL) {
fprintf (stderr, _("%s: no operating system was found on this disk\n"),
program_name);
free_strings (roots);
exit (EXIT_FAILURE);
}
if (roots[1] != NULL) {
fprintf (stderr, _("%s: multi-boot operating systems are not supported by the -i option\n"),
program_name);
free_strings (roots);
exit (EXIT_FAILURE);
}
root = roots[0];
free (roots);
inspect_mount_root (root);
}
void
inspect_mount_root (const char *root)
{
char **mountpoints = guestfs_inspect_get_mountpoints (g, root);
if (mountpoints == NULL)
exit (EXIT_FAILURE);
/* Sort by key length, shortest key first, so that we end up
* mounting the filesystems in the correct order.
*/
qsort (mountpoints, count_strings (mountpoints) / 2, 2 * sizeof (char *),
compare_keys_len);
size_t i;
size_t mount_errors = 0;
for (i = 0; mountpoints[i] != NULL; i += 2) {
int r;
if (!read_only)
r = guestfs_mount_options (g, "", mountpoints[i+1], mountpoints[i]);
else
r = guestfs_mount_ro (g, mountpoints[i+1], mountpoints[i]);
if (r == -1)
mount_errors++;
}
free_strings (mountpoints);
if (mount_errors)
fprintf (stderr, _("%s: some filesystems could not be mounted (ignored)\n"),
program_name);
}
/* This function is called only if the above function was called,
* and only after we've printed the prompt in interactive mode.
*/
void
print_inspect_prompt (void)
{
char *name = guestfs_inspect_get_product_name (g, root);
if (name && STRNEQ (name, "unknown"))
printf (_("Operating system: %s\n"), name);
free (name);
char **mountpoints = guestfs_inspect_get_mountpoints (g, root);
if (mountpoints == NULL)
return;
/* Sort by key. */
qsort (mountpoints, count_strings (mountpoints) / 2, 2 * sizeof (char *),
compare_keys);
size_t i;
for (i = 0; mountpoints[i] != NULL; i += 2)
printf (_("%s mounted on %s\n"), mountpoints[i+1], mountpoints[i]);
free_strings (mountpoints);
}
/* Make a LUKS map name from the partition name,
* eg "/dev/vda2" => "luksvda2"
*/
static void
make_mapname (const char *device, char *mapname, size_t len)
{
size_t i = 0;
if (len < 5)
abort ();
strcpy (mapname, "luks");
mapname += 4;
len -= 4;
if (STRPREFIX (device, "/dev/"))
i = 5;
for (; device[i] != '\0' && len >= 1; ++i) {
if (c_isalnum (device[i])) {
*mapname++ = device[i];
len--;
}
}
*mapname = '\0';
}
/* Simple implementation of decryption: look for any crypto_LUKS
* partitions and decrypt them, then rescan for VGs. This only works
* for Fedora whole-disk encryption. WIP to make this work for other
* encryption schemes.
*/
void
inspect_do_decrypt (void)
{
char **partitions = guestfs_list_partitions (g);
if (partitions == NULL)
exit (EXIT_FAILURE);
int need_rescan = 0;
size_t i;
for (i = 0; partitions[i] != NULL; ++i) {
char *type = guestfs_vfs_type (g, partitions[i]);
if (type && STREQ (type, "crypto_LUKS")) {
char mapname[32];
make_mapname (partitions[i], mapname, sizeof mapname);
char *key = read_key (partitions[i]);
/* XXX Should we call guestfs_luks_open_ro if readonly flag
* is set? This might break 'mount_ro'.
*/
if (guestfs_luks_open (g, partitions[i], key, mapname) == -1)
exit (EXIT_FAILURE);
free (key);
need_rescan = 1;
}
free (type);
}
free_strings (partitions);
if (need_rescan) {
if (guestfs_vgscan (g) == -1)
exit (EXIT_FAILURE);
if (guestfs_vg_activate_all (g, 1) == -1)
exit (EXIT_FAILURE);
}
}
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