Add --prefer option for --detail and --monitor

Both --detail and --monitor can report the names of member
devices on an array, and do so by searching /dev and finding
the shortest name that matches.

If
   --prefer=foo
is given, they will instead prefer a name that contain /foo/.
So
   mdadm --detail /dev/md0 --prefer=by-path

will list the component devices via their /dev/disk/by-path/xxx
names.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/ReadMe.c b/ReadMe.c
index a60e11bb..24c03e05 100644
--- a/ReadMe.c
+++ b/ReadMe.c
@@ -174,6 +174,7 @@ struct option long_options[] = {
     {"export",	  0, 0, 'Y'},
     {"sparc2.2",  0, 0, Sparc22},
     {"test",      0, 0, 't'},
+    {"prefer",    1, 0, Prefer},
 
     /* For Follow/monitor */
     {"mail",      1, 0, EMail},