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btrfs-progs: fix regexec to only work if we actually have a regexec

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We were unconditionally executing our regular expression, even though we may not
have one, so check to make sure mreg is not null before calling regexec.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Josef Bacik 2011-12-02 12:52:15 -05:00 committed by David Sterba
parent e35450fa53
commit 65b01dcc5a
1 changed files with 1 additions and 1 deletions
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cmds-restore.c
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@ -649,7 +649,7 @@ static int search_dir(struct btrfs_root *root, struct btrfs_key *key,
/* full path from root of btrfs being restored */
snprintf(fs_name, 4096, "%s/%s", dir, filename);
if (REG_NOMATCH == regexec(mreg, fs_name, 0, NULL, 0))
if (mreg && REG_NOMATCH == regexec(mreg, fs_name, 0, NULL, 0))
goto next;
/* full path from system root */