int root_mounted = 0;
/* The "simple mount" call offers no complex options, you can just
- * mount a device on a mountpoint.
+ * mount a device on a mountpoint. The variations like mount_ro,
+ * mount_options and mount_vfs let you set progressively more things.
*
* It's tempting to try a direct mount(2) syscall, but that doesn't
* do any autodetection, so we are better off calling out to
*/
int
-do_mount (const char *device, const char *mountpoint)
+do_mount_vfs (const char *options, const char *vfstype,
+ const char *device, const char *mountpoint)
{
int len, r, is_root;
char *mp;
snprintf (mp, len, "/sysroot%s", mountpoint);
- r = command (NULL, &error,
- "mount", "-o", "sync,noatime", device, mp, NULL);
+ if (vfstype)
+ r = command (NULL, &error,
+ "mount", "-o", options, "-t", vfstype, device, mp, NULL);
+ else
+ r = command (NULL, &error,
+ "mount", "-o", options, device, mp, NULL);
if (r == -1) {
reply_with_error ("mount: %s on %s: %s", device, mountpoint, error);
free (error);
return 0;
}
+
+int
+do_mount (const char *device, const char *mountpoint)
+{
+ return do_mount_vfs ("sync,noatime", NULL, device, mountpoint);
+}
+
+int
+do_mount_ro (const char *device, const char *mountpoint)
+{
+ return do_mount_vfs ("ro", NULL, device, mountpoint);
+}
+
+int
+do_mount_options (const char *options, const char *device,
+ const char *mountpoint)
+{
+ return do_mount_vfs (options, NULL, device, mountpoint);
+}
+
+/* Again, use the external /bin/umount program, so that /etc/mtab
+ * is kept updated.
+ */
+int
+do_umount (const char *pathordevice)
+{
+ int len, freeit = 0, r;
+ char *buf;
+ char *err;
+
+ if (strncmp (pathordevice, "/dev/", 5) == 0)
+ buf = (char *) pathordevice;
+ else {
+ len = strlen (pathordevice) + 9;
+ freeit = 1;
+ buf = malloc (len);
+ if (buf == NULL) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+ snprintf (buf, len, "/sysroot%s", pathordevice);
+ }
+
+ r = command (NULL, &err, "umount", buf, NULL);
+ if (freeit) free (buf);
+ if (r == -1) {
+ reply_with_error ("umount: %s: %s", pathordevice, err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ /* update root_mounted? */
+
+ return 0;
+}
+
+char **
+do_mounts (void)
+{
+ char *out, *err;
+ int r;
+ char **ret = NULL;
+ int size = 0, alloc = 0;
+ char *p, *pend, *p2;
+
+ r = command (&out, &err, "mount", NULL);
+ if (r == -1) {
+ reply_with_error ("mount: %s", err);
+ free (out);
+ free (err);
+ return NULL;
+ }
+
+ free (err);
+
+ p = out;
+ while (p) {
+ pend = strchr (p, '\n');
+ if (pend) {
+ *pend = '\0';
+ pend++;
+ }
+
+ /* Lines have the format:
+ * /dev/foo on /mountpoint type ...
+ */
+ p2 = strstr (p, " on /sysroot");
+ if (p2 != NULL) {
+ *p2 = '\0';
+ if (add_string (&ret, &size, &alloc, p) == -1) {
+ free (out);
+ return NULL;
+ }
+ }
+
+ p = pend;
+ }
+
+ free (out);
+
+ if (add_string (&ret, &size, &alloc, NULL) == -1)
+ return NULL;
+
+ return ret;
+}
+
+/* Unmount everything mounted under /sysroot.
+ *
+ * We have to unmount in the correct order, so we sort the paths by
+ * longest first to ensure that child paths are unmounted by parent
+ * paths.
+ *
+ * This call is more important than it appears at first, because it
+ * is widely used by both test and production code in order to
+ * get back to a known state (nothing mounted, everything synchronized).
+ */
+static int
+compare_longest_first (const void *vp1, const void *vp2)
+{
+ char * const *p1 = (char * const *) vp1;
+ char * const *p2 = (char * const *) vp2;
+ int n1 = strlen (*p1);
+ int n2 = strlen (*p2);
+ return n2 - n1;
+}
+
+int
+do_umount_all (void)
+{
+ char *out, *err;
+ int i, r;
+ char **mounts = NULL;
+ int size = 0, alloc = 0;
+ char *p, *p2, *p3, *pend;
+
+ r = command (&out, &err, "mount", NULL);
+ if (r == -1) {
+ reply_with_error ("mount: %s", err);
+ free (out);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ p = out;
+ while (p) {
+ pend = strchr (p, '\n');
+ if (pend) {
+ *pend = '\0';
+ pend++;
+ }
+
+ /* Lines have the format:
+ * /dev/foo on /mountpoint type ...
+ */
+ p2 = strstr (p, " on /sysroot");
+ if (p2 != NULL) {
+ p2 += 4;
+ p3 = p2 + strcspn (p2, " ");
+ *p3 = '\0';
+ if (add_string (&mounts, &size, &alloc, p2) == -1) {
+ free (out);
+ return -1;
+ }
+ }
+
+ p = pend;
+ }
+ free (out);
+
+ qsort (mounts, size, sizeof (char *), compare_longest_first);
+
+ /* Unmount them. */
+ for (i = 0; i < size; ++i) {
+ r = command (NULL, &err, "umount", mounts[i], NULL);
+ if (r == -1) {
+ reply_with_error ("umount: %s: %s", mounts[i], err);
+ free (err);
+ free_stringslen (mounts, size);
+ return -1;
+ }
+ free (err);
+ }
+
+ free_stringslen (mounts, size);
+
+ /* We've unmounted root now, so ... */
+ root_mounted = 0;
+
+ return 0;
+}