btrfs-progs: qgroup limit: add a check for invalid input of 'T/G/M/K'

Add a check to error out in the following case:

 # ./btrfs qgroup limit  T /mnt/
Invalid size argument given

Without this patch, btrfs-progs would parse the input as 0
and continue.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index 5ea4021..9545a20 100644 (file)
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -121,6 +121,9 @@ static int parse_limit(const char *p, unsigned long long *s)
                return 0;
 
        size = strtoull(p, &endptr, 10);
+       if (p == endptr)
+               return 0;
+
        switch (*endptr) {
        case 'T':
        case 't':