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https://github.com/libguestfs/libguestfs.git
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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "daemon.h"
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#include "actions.h"
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/* You must mount something on "/" first, hence: */
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int root_mounted = 0;
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/* The "simple mount" call offers no complex options, you can just
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* mount a device on a mountpoint.
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*
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* It's tempting to try a direct mount(2) syscall, but that doesn't
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* do any autodetection, so we are better off calling out to
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* /bin/mount.
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*/
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int
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do_mount (const char *device, const char *mountpoint)
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{
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int len, r, is_root;
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char *mp;
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char *error;
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is_root = strcmp (mountpoint, "/") == 0;
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if (!root_mounted && !is_root) {
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reply_with_error ("mount: you must mount something on / first");
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return -1;
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}
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len = strlen (mountpoint) + 9;
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mp = malloc (len);
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if (!mp) {
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reply_with_perror ("malloc");
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return -1;
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}
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snprintf (mp, len, "/sysroot%s", mountpoint);
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r = command (NULL, &error,
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"mount", "-o", "sync,noatime", device, mp, NULL);
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if (r == -1) {
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reply_with_error ("mount: %s on %s: %s", device, mountpoint, error);
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free (error);
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return -1;
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}
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if (is_root)
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root_mounted = 1;
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return 0;
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}
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