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btrfs-progs: Fix number of arguments check of 'btrfs fi df'

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'btrfs fi df' needs exactly one arguments as mount option,
but as 3.17 we can run 'btrfs fi df' without any argument,
and it will error as "ERROR: can't access '%s'" which means
the argument number does not do what it should.

The bug is caused by manually modify the optind and use check_argc_max()
instead of the original check_argc_exact().

This patch fixes it by not modifying the optind and use check_argc_exact()
again.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Qu Wenruo 2014-10-21 16:31:17 +08:00 committed by David Sterba
parent 34ed841dcd
commit ae8f7f687f
1 changed files with 1 additions and 2 deletions
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3
cmds-filesystem.c
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@ -241,7 +241,6 @@ static int cmd_df(int argc, char **argv)
DIR *dirstream = NULL;
unsigned unit_mode = UNITS_DEFAULT;
optind = 1;
while (1) {
int long_index;
static const struct option long_options[] = {
@ -290,7 +289,7 @@ static int cmd_df(int argc, char **argv)
}
}
if (check_argc_max(argc, optind + 1))
if (check_argc_exact(argc, optind + 1))
usage(cmd_df_usage);
path = argv[optind];