[getopt] Accept "--" as an end-of-options marker

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/core/getopt.c b/src/core/getopt.c
index b67da0c1301a26675751ebe064c96087d84312d5..8a0fa2d08f030eb069806b942a2eade4700573b4 100644 (file)
--- a/src/core/getopt.c
+++ b/src/core/getopt.c
@@ -239,6 +239,11 @@ int getopt_long ( int argc, char * const argv[], const char *optstring,
 
        /* Check for long options */
        if ( *(opttext++) == '-' ) {
+               /* "--" indicates end of options */
+               if ( *opttext == '\0' ) {
+                       optind++;
+                       return -1;
+               }
                for ( longopt = longopts ; longopt->name ; longopt++ ) {
                        if ( ! match_long_option ( argc, argv, opttext,
                                                   longopt, &option ) )