/* vi: set sw=4 ts=4: */
/*
- * getopt_ulflags implementation for busybox
+ * universal getopt_ulflags implementation for busybox
*
- * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
+ * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <getopt.h>
#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
#include "libbb.h"
-unsigned long bb_getopt_ulflags(int argc, char **argv, const char *applet_opts)
+/*
+You can set bb_opt_complementaly as string with one or more
+complementaly or incongruously options.
+If sequential founded option haved from this string
+then your incongruously pairs unsets and complementaly make add sets.
+Format:
+one char - option for check,
+chars - complementaly option for add sets.
+- chars - option triggered for unsets.
+~ chars - option incongruously.
+* - option list, called add_to_list(*ptr_from_usaged, optarg)
+: - separator.
+Example: du applet can have options "-s" and "-d size"
+If getopt found -s then -d option flag unset or if found -d then -s unset.
+For this result you must set bb_opt_complementaly = "s-d:d-s".
+Result have last option flag only from called arguments.
+Warning! You can check returned flag, pointer to "d:" argument seted
+to own optarg always.
+Example two: cut applet must only one type of list may be specified,
+and -b, -c and -f incongruously option, overwited option is error also.
+You must set bb_opt_complementaly = "b~bcf:c~bcf:f~bcf".
+If called have more one specified, return value have error flag -
+high bite set (0x80000000UL).
+Example three: grep applet can have one or more "-e pattern" arguments.
+You should use bb_getopt_ulflags() as
+llist_t *paterns;
+bb_opt_complementaly = "e*";
+bb_getopt_ulflags (argc, argv, "e:", &paterns);
+*/
+
+const char *bb_opt_complementaly;
+
+typedef struct
+{
+ char opt;
+ char list_flg;
+ unsigned long switch_on;
+ unsigned long switch_off;
+ unsigned long incongruously;
+ void **optarg; /* char **optarg or llist_t **optarg */
+} t_complementaly;
+
+/* You can set bb_applet_long_options for parse called long options */
+
+static const struct option bb_default_long_options[] = {
+ /* { "help", 0, NULL, '?' }, */
+ { 0, 0, 0, 0 }
+};
+
+const struct option *bb_applet_long_options = bb_default_long_options;
+
+
+unsigned long
+bb_getopt_ulflags (int argc, char **argv, const char *applet_opts, ...)
{
unsigned long flags = 0;
+ int c = 0;
const char *s;
- int c;
+ t_complementaly *complementaly;
+ t_complementaly *on_off;
+ va_list p;
- while ((c = getopt(argc, argv, applet_opts)) > 0) {
- if (!(s = strchr(applet_opts, c))) {
- bb_show_usage();
+ va_start (p, applet_opts);
+
+ /* skip GNU extension */
+ s = applet_opts;
+ if(*s == '+' || *s == '-')
+ s++;
+
+ for (; *s; s++) {
+ c++;
+ while (s[1] == ':') {
+ /* check GNU extension "o::" - optional arg */
+ s++;
+ }
+ }
+ complementaly = xcalloc (c + 1, sizeof (t_complementaly));
+ c = 0;
+ /* skip GNU extension */
+ s = applet_opts;
+ if(*s == '+' || *s == '-')
+ s++;
+
+ for (; *s; s++) {
+ complementaly->opt = *s;
+ complementaly->switch_on |= (1 << c);
+ c++;
+ if (s[1] == ':') {
+ complementaly->optarg = va_arg (p, void **);
+ do
+ s++;
+ while (s[1] == ':');
}
- flags |= (1 << (s-applet_opts));
+ complementaly++;
}
+ complementaly->opt = 0;
+ complementaly -= c;
+ c = 0;
+ for (s = bb_opt_complementaly; s && *s; s++) {
+ t_complementaly *pair;
+
+ if (*s == ':') {
+ c = 0;
+ continue;
+ }
+ if (c)
+ continue;
+ for (on_off = complementaly; on_off->opt; on_off++)
+ if (on_off->opt == *s)
+ break;
+ pair = on_off;
+ for(s++; *s && *s != ':'; s++) {
+ if (*s == '-' || *s == '~') {
+ c = *s;
+ } else if(*s == '*') {
+ pair->list_flg++;
+ } else {
+ unsigned long *pair_switch = &(pair->switch_on);
+ if(c)
+ pair_switch = c == '-' ? &(pair->switch_off) : &(pair->incongruously);
+ for (on_off = complementaly; on_off->opt; on_off++)
+ if (on_off->opt == *s) {
+ *pair_switch |= on_off->switch_on;
+ break;
+ }
+ }
+ }
+ s--;
+ }
+
+ while ((c = getopt_long (argc, argv, applet_opts,
+ bb_applet_long_options, NULL)) > 0) {
+
+ for (on_off = complementaly; on_off->opt != c; on_off++) {
+ if(!on_off->opt)
+ bb_show_usage ();
+ }
+ if(flags & on_off->incongruously)
+ flags |= 0x80000000UL;
+ flags &= ~on_off->switch_off;
+ flags |= on_off->switch_on;
+ if(on_off->list_flg) {
+ *(llist_t **)(on_off->optarg) =
+ llist_add_to(*(llist_t **)(on_off->optarg), optarg);
+ } else if (on_off->optarg) {
+ *(char **)(on_off->optarg) = optarg;
+ }
+ }
+ free(complementaly);
return flags;
}
projects / oweals / busybox.git / blobdiff