[PATCH 3/4] btrfs-progs: replace a confusing raw number with a macro

[Gui Hecheng <guihc.fnst@cn.fujitsu.com>]

The raw number 36 for the uuid string length is somewhat confusing,
use a macro to define replace it.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
---
 cmds-scrub.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmds-scrub.c b/cmds-scrub.c
index a604b25..03eb9ba 100644
--- a/cmds-scrub.c
+++ b/cmds-scrub.c
@@ -48,6 +48,8 @@ static const char * const scrub_cmd_group_usage[] = {
 	NULL
 };
 
+#define UUID_LEN_STR 36
+
 #define SCRUB_DATA_FILE "/var/lib/btrfs/scrub.status"
 #define SCRUB_PROGRESS_SOCKET_PATH "/var/lib/btrfs/scrub.progress"
 #define SCRUB_FILE_VERSION_PREFIX "scrub status"
@@ -550,7 +552,7 @@ again:
 				;
 			if (i + j + 1 >= avail)
 				_SCRUB_INVALID;
-			if (j != 36)
+			if (j != UUID_LEN_STR)
 				_SCRUB_INVALID;
 			l[i + j] = '\0';
 			ret = uuid_parse(l + i, p[curr]->fsid);
-- 
1.8.1.4