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btrfs-progs: use on-stack buffer for dev_to_fsid

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Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2015-11-06 17:09:17 +01:00
parent ee07dc99d1
commit b13197d68f
1 changed files with 1 additions and 7 deletions
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8
cmds-filesystem.c
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@ -510,18 +510,13 @@ out:
static int dev_to_fsid(char *dev, __u8 *fsid)
{
struct btrfs_super_block *disk_super;
char *buf;
char buf[BTRFS_SUPER_INFO_SIZE];
int ret;
int fd;
buf = malloc(4096);
if (!buf)
return -ENOMEM;
fd = open(dev, O_RDONLY);
if (fd < 0) {
ret = -errno;
free(buf);
return ret;
}
@ -536,7 +531,6 @@ static int dev_to_fsid(char *dev, __u8 *fsid)
out:
close(fd);
free(buf);
return ret;
}