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| author | Eric Sandeen <sandeen@redhat.com> | 2013-03-04 16:40:03 -0600 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2013-03-10 16:06:37 +0100 |
| commit | 6626354fdf00ce8d61edc69c0d65d283ef99c69c (patch) | |
| tree | 888eb88cb1d70d0baf472cfb61a937df600305b7 | |
| parent | 7b81119b1d3904cf00ec29140e8bc5d86a12902f (diff) | |
btrfs-progs: better option/error handling for btrfs-vol
Today wrong cmdlines give odd results:
# ./btrfs-vol /dev/sdb1
Unable to open device (null)
# ./btrfs-vol -a /dev/sdb1
usage: btrfs-vol [options] mount_point ...
Make it a bit more informative:
# ./btrfs-vol /dev/sdb1
No command specified
usage: btrfs-vol [options] mount_point ...
# ./btrfs-vol -a /dev/sdb1
No mountpoint specified
usage: btrfs-vol [options] mount_point ...
(even though it's deprecated ...)
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
| -rw-r--r-- | btrfs-vol.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/btrfs-vol.c b/btrfs-vol.c index 3cc1c327..e37b41ab 100644 --- a/btrfs-vol.c +++ b/btrfs-vol.c @@ -106,8 +106,13 @@ int main(int ac, char **av) } } ac = ac - optind; - if (ac == 0) + if (ac == 0 || !cmd) { + if (!ac) + fprintf(stderr, "No mountpoint specified\n"); + else + fprintf(stderr, "No command specified\n"); print_usage(); + } mnt = av[optind]; if (device && strcmp(device, "missing") == 0 && |