if w is given once, GNU ps sets the width to 132,
if w is given more than once, it is "unlimited"
- int w_counter = 0;
+ int w_counter = 0; // must be initialized!
opt_complementary = "ww";
getopt32(argv, "w", &w_counter);
if (w_counter)
opt_complementary = "vv:b::b-c:c-b";
f = getopt32(argv, "vb:c", &my_b, &verbose_level);
if (f & 2) // -c after -b unsets -b flag
- while (my_b) { dosomething_with(my_b->data); my_b = my_b->link; }
+ while (my_b) dosomething_with(llist_pop(&my_b));
if (my_b) // but llist is stored if -b is specified
free_llist(my_b);
if (verbose_level) printf("verbose level is %d\n", verbose_level);
"x--x" Variation of the above, it means that -x option should occur
at most once.
- "a+:" A plus after a char in opt_complementary means that the parameter
+ "a+" A plus after a char in opt_complementary means that the parameter
for this option is a nonnegative integer. It will be processed
with xatoi_u() - allowed range is 0..INT_MAX.
For example from "id" applet:
// Don't allow -n -r -rn -ug -rug -nug -rnug
- opt_complementary = "r?ug:n?ug:?u--g:g--u";
+ opt_complementary = "r?ug:n?ug:u--g:g--u";
flags = getopt32(argv, "rnug");
This example allowed only:
/* Code here assumes that 'unsigned' is at least 32 bits wide */
+const char *const bb_argv_dash[] = { "-", NULL };
+
const char *opt_complementary;
+/* Many small applets don't want to suck in stdio.h only because
+ * they need to parse options by calling us */
+#define DONT_USE_PRINTF 1
+
enum {
PARAM_STRING,
PARAM_LIST,
uint32_t option_mask32;
-uint32_t
+uint32_t FAST_FUNC
getopt32(char **argv, const char *applet_opts, ...)
{
int argc;
#define SHOW_USAGE_IF_ERROR 1
#define ALL_ARGV_IS_OPTS 2
#define FIRST_ARGV_IS_OPT 4
-#define FREE_FIRST_ARGV_IS_OPT 8
+#define FREE_FIRST_ARGV_IS_OPT (8 * !DONT_USE_PRINTF)
+
int spec_flgs = 0;
argc = 0;
if (spec_flgs & FIRST_ARGV_IS_OPT) {
if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0') {
+#if DONT_USE_PRINTF
+ char *pp = alloca(strlen(argv[1]) + 2);
+ *pp = '-';
+ strcpy(pp + 1, argv[1]);
+ argv[1] = pp;
+#else
argv[1] = xasprintf("-%s", argv[1]);
- if (ENABLE_FEATURE_CLEAN_UP)
- spec_flgs |= FREE_FIRST_ARGV_IS_OPT;
+ spec_flgs |= FREE_FIRST_ARGV_IS_OPT;
+#endif
}
}
if (on_off->counter)
(*(on_off->counter))++;
if (on_off->param_type == PARAM_LIST) {
- llist_add_to_end((llist_t **)(on_off->optarg), optarg);
+ if (optarg)
+ llist_add_to_end((llist_t **)(on_off->optarg), optarg);
} else if (on_off->param_type == PARAM_INT) {
- *(unsigned*)(on_off->optarg) = xatoi_u(optarg);
+ if (optarg)
+//TODO: xatoi_u indirectly pulls in printf machinery
+ *(unsigned*)(on_off->optarg) = xatoi_u(optarg);
} else if (on_off->optarg) {
- *(char **)(on_off->optarg) = optarg;
+ if (optarg)
+ *(char **)(on_off->optarg) = optarg;
}
if (pargv != NULL)
break;
}
}
-#if (ENABLE_AR || ENABLE_TAR) && ENABLE_FEATURE_CLEAN_UP
if (spec_flgs & FREE_FIRST_ARGV_IS_OPT)
free(argv[1]);
-#endif
+
/* check depending requires for given options */
for (on_off = complementary; on_off->opt_char; on_off++) {
if (on_off->requires && (flags & on_off->switch_on) &&