mount, umount, swapon, fsck, lsblk, findmnt: ignore malformed lines

The libmount provides way how to deal with parsing errors in fstab --
on error callback function is executed and according to the return
libmount manipulate with the malformed line, possible are three
states:

  1/ fatal error; all file ignored              (callback rc < 0)
  2/ recoverable error; malformed line ignored  (callback rc > 0)
  3/ ignore the error                           (callback rc == 0)

The 2/ is the default if no callback specified.

Unfortunately our utils uses 3/. The correct way is to use 2/.

Signed-off-by: Karel Zak <kzak@redhat.com>

6 files changed, 26 insertions, 4 deletions

diff --git a/disk-utils/fsck.c b/disk-utils/fsck.c
index a103408ef..ff504aa1d 100644
--- a/disk-utils/fsck.c
+++ b/disk-utils/fsck.c
@@ -471,7 +471,7 @@ static int parser_errcb(struct libmnt_table *tb __attribute__ ((__unused__)),
 			const char *filename, int line)
 {
 	warnx(_("%s: parse error at line %d -- ignore"), filename, line);
-	return 0;
+	return 1;
 }
 
 /*
diff --git a/misc-utils/findmnt.c b/misc-utils/findmnt.c
index 8218464b4..dd84671dc 100644
--- a/misc-utils/findmnt.c
+++ b/misc-utils/findmnt.c
@@ -805,7 +805,7 @@ static int parser_errcb(struct libmnt_table *tb __attribute__ ((__unused__)),
 			const char *filename, int line)
 {
 	warnx(_("%s: parse error at line %d"), filename, line);
-	return 0;
+	return 1;
 }
 
 static char **append_tabfile(char **files, int *nfiles, char *filename)
diff --git a/misc-utils/lsblk.c b/misc-utils/lsblk.c
index d1bb13a54..2604e84c2 100644
--- a/misc-utils/lsblk.c
+++ b/misc-utils/lsblk.c
@@ -426,6 +426,15 @@ static char *get_device_path(struct blkdev_cxt *cxt)
 	return xstrdup(path);
 }
 
+static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
+			const char *filename, int line)
+{
+	if (filename)
+		warnx(_("%s: parse error: ignore entry at line %d."),
+							filename, line);
+	return 1;
+}
+
 static int is_active_swap(const char *filename)
 {
 	if (!swaps) {
@@ -435,6 +444,7 @@ static int is_active_swap(const char *filename)
 		if (!mntcache)
 			mntcache = mnt_new_cache();
 
+		mnt_table_set_parser_errcb(swaps, table_parser_errcb);
 		mnt_table_set_cache(swaps, mntcache);
 		mnt_table_parse_swaps(swaps, NULL);
 	}
@@ -457,6 +467,7 @@ static char *get_device_mountpoint(struct blkdev_cxt *cxt)
 		if (!mntcache)
 			mntcache = mnt_new_cache();
 
+		mnt_table_set_parser_errcb(mtab, table_parser_errcb);
 		mnt_table_set_cache(mtab, mntcache);
 		mnt_table_parse_mtab(mtab, NULL);
 	}
diff --git a/sys-utils/mount.c b/sys-utils/mount.c
index c22c8c996..73f9d0b65 100644
--- a/sys-utils/mount.c
+++ b/sys-utils/mount.c
@@ -101,7 +101,7 @@ static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)
 	if (filename)
 		warnx(_("%s: parse error: ignore entry at line %d."),
 							filename, line);
-	return 0;
+	return 1;
 }
 
 /*
diff --git a/sys-utils/swapon-common.c b/sys-utils/swapon-common.c
index 8f7788cb0..75466a056 100644
--- a/sys-utils/swapon-common.c
+++ b/sys-utils/swapon-common.c
@@ -12,12 +12,22 @@ static struct libmnt_table *swaps, *fstab;
 
 struct libmnt_cache *mntcache;
 
+static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
+			const char *filename, int line)
+{
+	if (filename)
+		warnx(_("%s: parse error: ignore entry at line %d."),
+							filename, line);
+	return 1;
+}
+
 struct libmnt_table *get_fstab(void)
 {
 	if (!fstab) {
 		fstab = mnt_new_table();
 		if (!fstab)
 			return NULL;
+		mnt_table_set_parser_errcb(fstab, table_parser_errcb);
 		mnt_table_set_cache(fstab, mntcache);
 		if (mnt_table_parse_fstab(fstab, NULL) != 0)
 			return NULL;
@@ -33,6 +43,7 @@ struct libmnt_table *get_swaps(void)
 		if (!swaps)
 			return NULL;
 		mnt_table_set_cache(swaps, mntcache);
+		mnt_table_set_parser_errcb(swaps, table_parser_errcb);
 		if (mnt_table_parse_swaps(swaps, NULL) != 0)
 			return NULL;
 	}
diff --git a/sys-utils/umount.c b/sys-utils/umount.c
index 464c4c87f..1d866fa1a 100644
--- a/sys-utils/umount.c
+++ b/sys-utils/umount.c
@@ -45,7 +45,7 @@ static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)
 	if (filename)
 		warnx(_("%s: parse error: ignore entry at line %d."),
 							filename, line);
-	return 0;
+	return 1;
 }