lib/getopt_long: clear 'optarg' every time

We don't want a stale optarg argument to be available.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/lib/getopt_long.c b/lib/getopt_long.c
index bdd524babf0c4a2ab0f175e386481be9e5d47522..11d879ad2bfe70f4ab76d06bcc8aad20d36c4c16 100644 (file)
--- a/lib/getopt_long.c
+++ b/lib/getopt_long.c
@@ -46,6 +46,8 @@ int getopt_long_only(int argc, char *const *argv, const char *optstring,
        const char *osptr;
        int opt;
 
+       optarg = NULL;
+
        /* getopt() relies on a number of different global state
           variables, which can make this really confusing if there is
           more than one use of getopt() in the same program.  This