getopt32 must remain NOFORK-safe (no mallocs!). Using alloca and pretending
stack is infinite. Unfortunately, +79 bytes.
diff --git a/libbb/getopt32.c b/libbb/getopt32.c
index e5d97e9..25eb113 100644
--- a/libbb/getopt32.c
+++ b/libbb/getopt32.c
@@ -307,7 +307,7 @@
va_list p;
#if ENABLE_GETOPT_LONG
const struct option *l_o;
- struct option *long_options = NULL;
+ struct option *long_options = (struct option *) &bb_null_long_options;
#endif
unsigned trigger;
char **pargv = NULL;
@@ -350,11 +350,11 @@
count = 1;
optstr = applet_long_options;
while (optstr[0]) {
- optstr += strlen(optstr) + 3; /* skip \0, has_arg, val */
+ optstr += strlen(optstr) + 3; /* skip NUL, has_arg, val */
count++;
}
/* count == no. of longopts + 1 */
- long_options = xzalloc(count * sizeof(*long_options));
+ long_options = alloca(count * sizeof(*long_options));
i = 0;
optstr = applet_long_options;
while (--count) {
@@ -476,7 +476,7 @@
* (supposed to act as --header, but doesn't) */
#if ENABLE_GETOPT_LONG
while ((c = getopt_long(argc, argv, applet_opts,
- long_options ? long_options : bb_null_long_options, NULL)) != -1) {
+ long_options, NULL)) != -1) {
#else
while ((c = getopt(argc, argv, applet_opts)) != -1) {
#endif
@@ -535,9 +535,6 @@
if (argc < min_arg || (max_arg >= 0 && argc > max_arg))
bb_show_usage();
-#if ENABLE_GETOPT_LONG
- free(long_options);
-#endif
option_mask32 = flags;
return flags;
}