1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 /* You must mount something on "/" first, hence: */
32 /* The "simple mount" call offers no complex options, you can just
33 * mount a device on a mountpoint.
35 * It's tempting to try a direct mount(2) syscall, but that doesn't
36 * do any autodetection, so we are better off calling out to
41 do_mount (const char *device, const char *mountpoint)
47 is_root = strcmp (mountpoint, "/") == 0;
49 if (!root_mounted && !is_root) {
50 reply_with_error ("mount: you must mount something on / first");
54 len = strlen (mountpoint) + 9;
58 reply_with_perror ("malloc");
62 snprintf (mp, len, "/sysroot%s", mountpoint);
64 r = command (NULL, &error,
65 "mount", "-o", "sync,noatime", device, mp, NULL);
67 reply_with_error ("mount: %s on %s: %s", device, mountpoint, error);
78 /* Again, use the external /bin/umount program, so that /etc/mtab
82 do_umount (const char *pathordevice)
84 int len, freeit = 0, r;
88 if (strncmp (pathordevice, "/dev/", 5) == 0)
89 buf = (char *) pathordevice;
91 len = strlen (pathordevice) + 9;
95 reply_with_perror ("malloc");
98 snprintf (buf, len, "/sysroot%s", pathordevice);
101 r = command (NULL, &err, "umount", buf, NULL);
102 if (freeit) free (buf);
104 reply_with_error ("umount: %s: %s", pathordevice, err);
111 /* update root_mounted? */
122 int size = 0, alloc = 0;
125 r = command (&out, &err, "mount", NULL);
127 reply_with_error ("mount: %s", err);
137 pend = strchr (p, '\n');
143 /* Lines have the format:
144 * /dev/foo on /mountpoint type ...
146 p2 = strstr (p, " on /sysroot");
149 if (add_string (&ret, &size, &alloc, p) == -1) {
160 if (add_string (&ret, &size, &alloc, NULL) == -1)
166 /* Only unmount stuff under /sysroot */
174 mounts = do_mounts ();
175 if (mounts == NULL) /* do_mounts has already replied */
178 for (i = 0; mounts[i] != NULL; ++i) {
179 r = command (NULL, &err, "umount", mounts[i], NULL);
181 reply_with_error ("umount: %s: %s", mounts[i], err);
183 free_strings (mounts);
189 free_strings (mounts);