support options after non-option arguments in getopt_long (argv permutation)

[musl] / src / misc / getopt_long.c

diff --git a/src/misc/getopt_long.c b/src/misc/getopt_long.c
index 3d318ce..643e598 100644 (file)
--- a/src/misc/getopt_long.c
+++ b/src/misc/getopt_long.c
@@ -5,14 +5,53 @@
 
 extern int __optpos, __optreset;
 
+static void permute(char *const *argv, int dest, int src)
+{
+       char **av = (char **)argv;
+       char *tmp = av[src];
+       int i;
+       for (i=src; i>dest; i--)
+               av[i] = av[i-1];
+       av[dest] = tmp;
+}
+
+static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly);
+
 static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
 {
+       int ret, skipped, resumed;
        if (!optind || __optreset) {
                __optreset = 0;
                __optpos = 0;
                optind = 1;
        }
        if (optind >= argc || !argv[optind]) return -1;
+       skipped = optind;
+       if (optstring[0] != '+' && optstring[0] != '-') {
+               int i;
+               for (i=optind; ; i++) {
+                       if (i >= argc || !argv[i]) return -1;
+                       if (argv[i][0] != '-') continue;
+                       if (!argv[i][1]) continue;
+                       if (argv[i][1] == '-' && !argv[i][2]) return -1;
+                       break;
+               }
+               optind = i;
+       }
+       resumed = optind;
+       ret = __getopt_long_core(argc, argv, optstring, longopts, idx, longonly);
+       if (resumed > skipped) {
+               int i, cnt = optind-resumed;
+               for (i=0; i<cnt; i++)
+                       permute(argv, skipped, optind-1);
+               optind = skipped + cnt;
+       }
+       return ret;
+}
+
+static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
+{
+
        if (argv[optind][0] == '-' &&
                ((longonly && argv[optind][1]) ||
                 (argv[optind][1] == '-' && argv[optind][2])))