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.
25 #include "../src/guestfs_protocol.h"
30 do_command (char **argv)
34 char *sysroot_dev, *sysroot_dev_pts, *sysroot_proc,
35 *sysroot_selinux, *sysroot_sys;
36 int dev_ok, dev_pts_ok, proc_ok, selinux_ok, sys_ok;
38 /* We need a root filesystem mounted to do this. */
41 /* Conveniently, argv is already a NULL-terminated argv-style array
42 * of parameters, so we can pass it straight in to our internal
43 * commandv. We just have to check the list is non-empty.
45 if (argv[0] == NULL) {
46 reply_with_error ("command: passed an empty list");
50 /* While running the command, bind-mount /dev, /proc, /sys
51 * into the chroot. However we must be careful to unmount them
52 * afterwards because otherwise they would interfere with
53 * future mount and unmount operations.
55 * We deliberately allow these commands to fail silently, BUT
56 * if a mount fails, don't unmount the corresponding mount.
58 sysroot_dev = sysroot_path ("/dev");
59 sysroot_dev_pts = sysroot_path ("/dev/pts");
60 sysroot_proc = sysroot_path ("/proc");
61 sysroot_selinux = sysroot_path ("/selinux");
62 sysroot_sys = sysroot_path ("/sys");
64 r = command (NULL, NULL, "mount", "--bind", "/dev", sysroot_dev, NULL);
66 r = command (NULL, NULL, "mount", "--bind", "/dev/pts", sysroot_dev_pts, NULL);
68 r = command (NULL, NULL, "mount", "--bind", "/proc", sysroot_proc, NULL);
70 r = command (NULL, NULL, "mount", "--bind", "/selinux", sysroot_selinux, NULL);
72 r = command (NULL, NULL, "mount", "--bind", "/sys", sysroot_sys, NULL);
76 r = commandv (&out, &err, argv);
79 if (sys_ok) command (NULL, NULL, "umount", sysroot_sys, NULL);
80 if (selinux_ok) command (NULL, NULL, "umount", sysroot_selinux, NULL);
81 if (proc_ok) command (NULL, NULL, "umount", sysroot_proc, NULL);
82 if (dev_pts_ok) command (NULL, NULL, "umount", sysroot_dev_pts, NULL);
83 if (dev_ok) command (NULL, NULL, "umount", sysroot_dev, NULL);
86 free (sysroot_dev_pts);
88 free (sysroot_selinux);
92 reply_with_error ("%s", err);
100 return out; /* Caller frees. */
104 do_command_lines (char **argv)
109 out = do_command (argv);
113 lines = split_lines (out);
119 return lines; /* Caller frees. */
123 do_sh (char *command)
125 char *argv[] = { "/bin/sh", "-c", command, NULL };
127 return do_command (argv);
131 do_sh_lines (char *command)
133 char *argv[] = { "/bin/sh", "-c", command, NULL };
135 return do_command_lines (argv);