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Date: Wed, 06 Feb 2008 12:39:03 +0100
From: Matthias Koenig <mkoenig@...e.de>
To: util-linux-ng@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: [PATCH 3/3] fsck: Do not check mounted filesystems
Add option -m to ignore and return an exit code of 0
for mounted filesystems.
Signed-off-by: Matthias Koenig <mkoenig@...e.de>
---
fsck/fsck.8.in | 4 +++
fsck/fsck.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 80 insertions(+), 1 deletions(-)
diff --git a/fsck/fsck.8.in b/fsck/fsck.8.in
index 4a12677..087321b 100644
--- a/fsck/fsck.8.in
+++ b/fsck/fsck.8.in
@@ -180,6 +180,10 @@ option,
will use the specified filesystem type. If this type is not
available, then the default file system type (currently ext2) is used.
.TP
+.B \-m
+Do not check mounted filesystems and return an exit code of 0
+for mounted filesystems.
+.TP
.B \-A
Walk through the
.I /etc/fstab
diff --git a/fsck/fsck.c b/fsck/fsck.c
index c7905c4..14d490f 100644
--- a/fsck/fsck.c
+++ b/fsck/fsck.c
@@ -89,6 +89,7 @@ int noexecute = 0;
int serialize = 0;
int skip_root = 0;
int like_mount = 0;
+int ignore_mounted = 0;
int notitle = 0;
int parallel_root = 0;
int progress = 0;
@@ -837,6 +838,56 @@ static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
return (cmp->negate ? !ret : ret);
}
+/* Check to see whether a filesystem is already mounted */
+static int is_mounted(struct fs_info *fs)
+{
+ struct stat st_buf;
+ dev_t fs_rdev;
+ char *testdir;
+ int retval = 0;
+
+ if (!fs->mountpt) {
+ /*
+ * We have already read /proc/mounts
+ * so any device without a mountpoint
+ * is indeed not mounted.
+ */
+ return 0;
+ }
+
+ if (!strcmp(fs->mountpt,"/")) {
+ /* Root should be always mounted */
+ return 1;
+ }
+
+ if (stat(fs->mountpt, &st_buf) < 0)
+ return 0;
+
+ if (!S_ISDIR(st_buf.st_mode)) {
+ /* This is not a directory, cannot be mounted */
+ return 0;
+ }
+
+ fs_rdev = st_buf.st_dev;
+
+ /* Compare with the upper directory */
+ testdir = malloc(strlen(fs->mountpt) + 4);
+ strcpy(testdir,fs->mountpt);
+ if (fs->mountpt[strlen(fs->mountpt) - 1] == '/')
+ strcat(testdir,"..");
+ else
+ strcat(testdir,"/..");
+
+ if (stat(testdir, &st_buf) == 0) {
+ if (st_buf.st_dev != fs_rdev) {
+ retval = 1;
+ }
+ }
+ free(testdir);
+
+ return retval;
+}
+
/* Check if we should ignore this filesystem. */
static int ignore(struct fs_info *fs)
{
@@ -994,6 +1045,15 @@ static int check_all(NOARGS)
not_done_yet++;
continue;
}
+ if (ignore_mounted) {
+ /*
+ * Ignore mounted devices.
+ */
+ if (is_mounted(fs)) {
+ fs->flags |= FLAG_DONE;
+ continue;
+ }
+ }
/*
* If a filesystem on a particular device has
* already been spawned, then we need to defer
@@ -1043,7 +1103,7 @@ static int check_all(NOARGS)
static void usage(NOARGS)
{
- fputs(_("Usage: fsck [-ANPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
+ fputs(_("Usage: fsck [-AmNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr);
exit(EXIT_USAGE);
}
@@ -1171,6 +1231,9 @@ static void PRS(int argc, char *argv[])
case 'P':
parallel_root++;
break;
+ case 'm':
+ ignore_mounted++;
+ break;
case 's':
serialize++;
break;
@@ -1245,6 +1308,10 @@ int main(int argc, char *argv[])
fstab = _PATH_MNTTAB;
load_fs_info(fstab);
+ /* Load info from /proc/mounts, too */
+ if (ignore_mounted)
+ load_fs_info("/proc/mounts");
+
/* Update our search path to include uncommon directories. */
if (oldpath) {
fsck_path = malloc (strlen (fsck_prefix_path) + 1 +
@@ -1287,6 +1354,14 @@ int main(int argc, char *argv[])
if (!fs)
continue;
}
+ if (ignore_mounted) {
+ /*
+ * Ignore mounted devices.
+ */
+ if (is_mounted(fs)) {
+ continue;
+ }
+ }
fsck_device(fs, interactive);
if (serialize ||
(max_running && (num_running >= max_running))) {
-
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