getopt: fix optional argument processing

Processing an option character with optional argument fails if the
option is last on the command line. This happens because the
if (optind >= argc) check runs first before testing for optional
argument.

diff --git a/src/misc/getopt.c b/src/misc/getopt.c
index 8a2e4d5..f94c4f7 100644 (file)
--- a/src/misc/getopt.c
+++ b/src/misc/getopt.c
@@ -55,7 +55,8 @@ int getopt(int argc, char * const argv[], const char *optstring)
                return '?';
        }
        if (optstring[i+1] == ':') {
-               if (optind >= argc) {
+               if (optstring[i+2] == ':') optarg = 0;
+               else if (optind >= argc) {
                        if (optstring[0] == ':') return ':';
                        if (opterr) {
                                write(2, argv[0], strlen(argv[0]));
@@ -65,7 +66,6 @@ int getopt(int argc, char * const argv[], const char *optstring)
                        }
                        return '?';
                }
-               if (optstring[i+2] == ':') optarg = 0;
                if (optstring[i+2] != ':' || optpos) {
                        optarg = argv[optind++] + optpos;
                        optpos = 0;