Quoting from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=506695 : according to mount(8), mount tries to guess a filesystem type when given fstype `auto' and it tries multiple filesystems if a list of fstypes is given. A single fstype `auto' works as expected: mount -t auto /dev/sde /media/stick mounts /dev/sde as vfat, which is correct. However, merging `auto' with other types doesn't work as expected: mount -t ext2,auto /dev/sde /media/stick does not mount /dev/sde but returns: mount: unknown filesystem type 'auto' Trying multiple fstypes before allowing mount to guess makes sense in different scenarios, for example to prefer specific fstypes (ext2 instead of ext3) or to try fstypes that mount doesn't guess (minix). I'm not sure if the Debian installer still sets CDROM fstab entries to `udf,iso9660,auto' but I remember it did once. This wouldn't work then either. Reported-by: "Mario 'BitKoenig' Holbe" <Mario.Holbe@xxxxxxxxxxxxx> Signed-off-by: Andreas Henriksson <andreas@xxxxxxxx> --- libmount/src/context_mount.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libmount/src/context_mount.c b/libmount/src/context_mount.c index dcfdabf..d07fa02 100644 --- a/libmount/src/context_mount.c +++ b/libmount/src/context_mount.c @@ -782,6 +782,8 @@ static int do_mount_by_pattern(struct libmnt_context *cxt, const char *pattern) char *end = strchr(p, ','); if (end) *end = '\0'; + if (strcmp(p, "auto") == 0) + p = NULL; rc = do_mount(cxt, p); p = end ? end + 1 : NULL; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
