| /* vi: set sw=4 ts=4: */ |
| /* |
| * universal getopt_ulflags implementation for busybox |
| * |
| * 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 |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <getopt.h> |
| #include <string.h> |
| #include <assert.h> |
| #include <stdlib.h> |
| #include "libbb.h" |
| |
| /* |
| 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~cf:c~bf:f~bc". |
| 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 |
| { |
| unsigned 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; |
| t_complementaly complementaly[sizeof(flags) * 8 + 1]; |
| int c; |
| const unsigned char *s; |
| t_complementaly *on_off; |
| va_list p; |
| |
| va_start (p, applet_opts); |
| |
| /* skip GNU extension */ |
| s = applet_opts; |
| if(*s == '+' || *s == '-') |
| s++; |
| |
| c = 0; |
| on_off = complementaly; |
| for (; *s; s++) { |
| if(c >= (sizeof(flags)*8)) |
| break; |
| on_off->opt = *s; |
| on_off->switch_on |= (1 << c); |
| on_off->list_flg = 0; |
| on_off->switch_off = 0; |
| on_off->incongruously = 0; |
| on_off->optarg = NULL; |
| if (s[1] == ':') { |
| on_off->optarg = va_arg (p, void **); |
| do |
| s++; |
| while (s[1] == ':'); |
| } |
| on_off++; |
| c++; |
| } |
| on_off->opt = 0; |
| 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; |
| } |
| } |
| return flags; |
| } |