blob: d4465f8996540983aab74d12da23db5b48488c6e [file] [log] [blame]
Manuel Novoa III cad53642003-03-19 09:13:01 +00001/* vi: set sw=4 ts=4: */
2/*
Denis Vlasenko67b23e62006-10-03 21:00:06 +00003 * universal getopt32 implementation for busybox
Manuel Novoa III cad53642003-03-19 09:13:01 +00004 *
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +00005 * Copyright (C) 2003-2005 Vladimir Oleynik <dzo@simtreas.ru>
Manuel Novoa III cad53642003-03-19 09:13:01 +00006 *
"Robert P. J. Day"5d8843e2006-07-10 11:41:19 +00007 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Manuel Novoa III cad53642003-03-19 09:13:01 +00008 */
9
Rob Landleyd921b2e2006-08-03 15:41:12 +000010#include <getopt.h>
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000011#include "libbb.h"
Manuel Novoa III cad53642003-03-19 09:13:01 +000012
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000013/* Documentation
Mike Frysinger2bf88a82005-04-18 22:42:58 +000014
Denis Vlasenko67b23e62006-10-03 21:00:06 +000015uint32_t
16getopt32(int argc, char **argv, const char *applet_opts, ...)
Mike Frysinger2bf88a82005-04-18 22:42:58 +000017
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000018 The command line options must be declared in const char
19 *applet_opts as a string of chars, for example:
Mike Frysinger2bf88a82005-04-18 22:42:58 +000020
Denis Vlasenko67b23e62006-10-03 21:00:06 +000021 flags = getopt32(argc, argv, "rnug");
Mike Frysinger2bf88a82005-04-18 22:42:58 +000022
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000023 If one of the given options is found, a flag value is added to
24 the return value (an unsigned long).
Mike Frysinger2bf88a82005-04-18 22:42:58 +000025
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000026 The flag value is determined by the position of the char in
27 applet_opts string. For example, in the above case:
Mike Frysinger2bf88a82005-04-18 22:42:58 +000028
Denis Vlasenko67b23e62006-10-03 21:00:06 +000029 flags = getopt32(argc, argv, "rnug");
Mike Frysinger2bf88a82005-04-18 22:42:58 +000030
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000031 "r" will add 1 (bit 0)
32 "n" will add 2 (bit 1)
33 "u will add 4 (bit 2)
34 "g" will add 8 (bit 3)
Mike Frysinger2bf88a82005-04-18 22:42:58 +000035
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000036 and so on. You can also look at the return value as a bit
37 field and each option sets one bit.
Mike Frysinger2bf88a82005-04-18 22:42:58 +000038
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000039 On exit, global variable optind is set so that if you
40 will do argc -= optind; argv += optind; then
41 argc will be equal to number of remaining non-option
42 arguments, first one would be in argv[0], next in argv[1] and so on
43 (options and their parameters will be moved into argv[]
44 positions prior to argv[optind]).
Denis Vlasenko65dbd872006-09-03 12:27:25 +000045
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +000046 ":" If one of the options requires an argument, then add a ":"
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000047 after the char in applet_opts and provide a pointer to store
48 the argument. For example:
Mike Frysinger2bf88a82005-04-18 22:42:58 +000049
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000050 char *pointer_to_arg_for_a;
51 char *pointer_to_arg_for_b;
52 char *pointer_to_arg_for_c;
53 char *pointer_to_arg_for_d;
Mike Frysinger2bf88a82005-04-18 22:42:58 +000054
Denis Vlasenko67b23e62006-10-03 21:00:06 +000055 flags = getopt32(argc, argv, "a:b:c:d:",
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000056 &pointer_to_arg_for_a, &pointer_to_arg_for_b,
57 &pointer_to_arg_for_c, &pointer_to_arg_for_d);
Mike Frysinger2bf88a82005-04-18 22:42:58 +000058
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000059 The type of the pointer (char* or llist_t*) may be controlled
60 by the "::" special separator that is set in the external string
Denis Vlasenko67b23e62006-10-03 21:00:06 +000061 opt_complementary (see below for more info).
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000062
63 "::" If option can have an *optional* argument, then add a "::"
64 after its char in applet_opts and provide a pointer to store
65 the argument. Note that optional arguments _must_
66 immediately follow the option: -oparam, not -o param.
Mike Frysingere5d0bde2005-05-10 23:48:35 +000067
Mike Frysinger992a58c2006-02-22 22:56:30 +000068 "+" If the first character in the applet_opts string is a plus,
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000069 then option processing will stop as soon as a non-option is
70 encountered in the argv array. Useful for applets like env
71 which should not process arguments to subprograms:
72 env -i ls -d /
73 Here we want env to process just the '-i', not the '-d'.
Mike Frysinger992a58c2006-02-22 22:56:30 +000074
Denis Vlasenko67b23e62006-10-03 21:00:06 +000075const struct option *applet_long_options
Mike Frysingere5d0bde2005-05-10 23:48:35 +000076
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000077 This struct allows you to define long options. The syntax for
78 declaring the array is just like that of getopt's longopts.
79 (see getopt(3))
Mike Frysingere5d0bde2005-05-10 23:48:35 +000080
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000081 static const struct option applet_long_options[] = {
Denis Vlasenko8e858e22007-03-07 09:35:43 +000082 //name,has_arg,flag,val
83 { "verbose", 0, 0, 'v' },
84 { 0, 0, 0, 0 }
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000085 };
Denis Vlasenko67b23e62006-10-03 21:00:06 +000086 applet_long_options = applet_long_options;
Mike Frysingere5d0bde2005-05-10 23:48:35 +000087
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000088 The last member of struct option (val) typically is set to
89 matching short option from applet_opts. If there is no matching
90 char in applet_opts, then:
91 - return bit have next position after short options
92 - if has_arg is not "no_argument", use ptr for arg also
Denis Vlasenko67b23e62006-10-03 21:00:06 +000093 - opt_complementary affects it too
Mike Frysingerfb6d22c2005-05-11 00:02:39 +000094
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +000095 Note: a good applet will make long options configurable via the
96 config process and not a required feature. The current standard
97 is to name the config option CONFIG_FEATURE_<applet>_LONG_OPTIONS.
Mike Frysingerfb6d22c2005-05-11 00:02:39 +000098
Denis Vlasenko67b23e62006-10-03 21:00:06 +000099const char *opt_complementary
Mike Frysingerfb6d22c2005-05-11 00:02:39 +0000100
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000101 ":" The colon (":") is used to separate groups of two or more chars
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000102 and/or groups of chars and special characters (stating some
103 conditions to be checked).
Mike Frysingere5d0bde2005-05-10 23:48:35 +0000104
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000105 "abc" If groups of two or more chars are specified, the first char
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000106 is the main option and the other chars are secondary options.
107 Their flags will be turned on if the main option is found even
108 if they are not specifed on the command line. For example:
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000109
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000110 opt_complementary = "abc";
111 flags = getopt32(argc, argv, "abcd")
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000112
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000113 If getopt() finds "-a" on the command line, then
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000114 getopt32's return value will be as if "-a -b -c" were
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000115 found.
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000116
Bernhard Reutner-Fischer43fb3fc2005-10-05 12:23:13 +0000117 "ww" Adjacent double options have a counter associated which indicates
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000118 the number of occurences of the option.
119 For example the ps applet needs:
120 if w is given once, GNU ps sets the width to 132,
121 if w is given more than once, it is "unlimited"
"Vladimir N. Oleynik"be0ed3d2005-10-04 16:48:26 +0000122
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000123 int w_counter = 0;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000124 opt_complementary = "ww";
125 getopt32(argc, argv, "w", &w_counter);
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000126 if (w_counter)
127 width = (w_counter == 1) ? 132 : INT_MAX;
128 else
129 get_terminal_width(...&width...);
"Vladimir N. Oleynik"be0ed3d2005-10-04 16:48:26 +0000130
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000131 w_counter is a pointer to an integer. It has to be passed to
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000132 getopt32() after all other option argument sinks.
Denis Vlasenko6429aab2006-09-23 12:22:11 +0000133
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000134 For example: accept multiple -v to indicate the level of verbosity
135 and for each -b optarg, add optarg to my_b. Finally, if b is given,
136 turn off c and vice versa:
Bernhard Reutner-Fischer43fb3fc2005-10-05 12:23:13 +0000137
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000138 llist_t *my_b = NULL;
139 int verbose_level = 0;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000140 opt_complementary = "vv:b::b-c:c-b";
141 f = getopt32(argc, argv, "vb:c", &my_b, &verbose_level);
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000142 if (f & 2) // -c after -b unsets -b flag
143 while (my_b) { dosomething_with(my_b->data); my_b = my_b->link; }
144 if (my_b) // but llist is stored if -b is specified
145 free_llist(my_b);
Denis Vlasenkof0ed3762006-10-26 23:21:47 +0000146 if (verbose_level) printf("verbose level is %d\n", verbose_level);
"Vladimir N. Oleynik"be0ed3d2005-10-04 16:48:26 +0000147
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000148Special characters:
149
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000150 "-" A dash as the first char in a opt_complementary group forces
151 all arguments to be treated as options, even if they have
152 no leading dashes. Next char in this case can't be a digit (0-9),
153 use ':' or end of line. For example:
154
155 opt_complementary = "-:w-x:x-w";
156 getopt32(argc, argv, "wx");
157
158 Allows any arguments to be given without a dash (./program w x)
159 as well as with a dash (./program -x).
160
161 "--" A double dash at the beginning of opt_complementary means the
162 argv[1] string should always be treated as options, even if it isn't
163 prefixed with a "-". This is useful for special syntax in applets
164 such as "ar" and "tar":
165 tar xvf foo.tar
166
167 "-N" A dash as the first char in a opt_complementary group followed
168 by a single digit (0-9) means that at least N non-option
169 arguments must be present on the command line
170
171 "=N" An equal sign as the first char in a opt_complementary group followed
172 by a single digit (0-9) means that exactly N non-option
173 arguments must be present on the command line
174
175 "?N" A "?" as the first char in a opt_complementary group followed
176 by a single digit (0-9) means that at most N arguments must be present
177 on the command line.
178
179 "V-" An option with dash before colon or end-of-line results in
180 bb_show_usage being called if this option is encountered.
181 This is typically used to implement "print verbose usage message
182 and exit" option.
183
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000184 "-" A dash between two options causes the second of the two
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000185 to be unset (and ignored) if it is given on the command line.
Rob Landleyf76cd962006-05-03 21:23:15 +0000186
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000187 [FIXME: what if they are the same? like "x-x"? Is it ever useful?]
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000188
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000189 For example:
190 The du applet has the options "-s" and "-d depth". If
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000191 getopt32 finds -s, then -d is unset or if it finds -d
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000192 then -s is unset. (Note: busybox implements the GNU
193 "--max-depth" option as "-d".) To obtain this behavior, you
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000194 set opt_complementary = "s-d:d-s". Only one flag value is
195 added to getopt32's return value depending on the
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000196 position of the options on the command line. If one of the
197 two options requires an argument pointer (":" in applet_opts
198 as in "d:") optarg is set accordingly.
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000199
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000200 char *smax_print_depth;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000201
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000202 opt_complementary = "s-d:d-s:x-x";
203 opt = getopt32(argc, argv, "sd:x", &smax_print_depth);
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000204
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000205 if (opt & 2)
206 max_print_depth = atoi(smax_print_depth);
207 if (opt & 4)
208 printf("Detected odd -x usage\n");
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000209
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000210 "--" A double dash between two options, or between an option and a group
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000211 of options, means that they are mutually exclusive. Unlike
212 the "-" case above, an error will be forced if the options
213 are used together.
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000214
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000215 For example:
216 The cut applet must have only one type of list specified, so
217 -b, -c and -f are mutally exclusive and should raise an error
218 if specified together. In this case you must set
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000219 opt_complementary = "b--cf:c--bf:f--bc". If two of the
220 mutually exclusive options are found, getopt32's
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000221 return value will have the error flag set (BB_GETOPT_ERROR) so
222 that we can check for it:
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000223
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000224 if (flags & BB_GETOPT_ERROR)
225 bb_show_usage();
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000226
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000227 "x--x" Variation of the above, it means that -x option should occur
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000228 at most once.
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000229
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000230 "?" A "?" as the first char in a opt_complementary group means:
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000231 if BB_GETOPT_ERROR is detected, don't return, call bb_show_usage
232 and exit instead. Next char after '?' can't be a digit.
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000233
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000234 "::" A double colon after a char in opt_complementary means that the
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000235 option can occur multiple times. Each occurrence will be saved as
236 a llist_t element instead of char*.
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000237
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000238 For example:
239 The grep applet can have one or more "-e pattern" arguments.
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000240 In this case you should use getopt32() as follows:
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000241
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000242 llist_t *patterns = NULL;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000243
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000244 (this pointer must be initializated to NULL if the list is empty
Denis Vlasenko8d9f4952007-04-08 15:08:42 +0000245 as required by llist_add_to_end(llist_t **old_head, char *new_item).)
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000246
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000247 opt_complementary = "e::";
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000248
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000249 getopt32(argc, argv, "e:", &patterns);
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000250 $ grep -e user -e root /etc/passwd
251 root:x:0:0:root:/root:/bin/bash
252 user:x:500:500::/home/user:/bin/bash
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000253
Rob Landleyf76cd962006-05-03 21:23:15 +0000254 "?" An "?" between an option and a group of options means that
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000255 at least one of them is required to occur if the first option
256 occurs in preceding command line arguments.
Rob Landleyf76cd962006-05-03 21:23:15 +0000257
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000258 For example from "id" applet:
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000259
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000260 // Don't allow -n -r -rn -ug -rug -nug -rnug
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000261 opt_complementary = "r?ug:n?ug:?u--g:g--u";
262 flags = getopt32(argc, argv, "rnug");
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000263
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000264 This example allowed only:
265 $ id; id -u; id -g; id -ru; id -nu; id -rg; id -ng; id -rnu; id -rng
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000266
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000267 "X" A opt_complementary group with just a single letter means
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000268 that this option is required. If more than one such group exists,
269 at least one option is required to occur (not all of them).
270 For example from "start-stop-daemon" applet:
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000271
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000272 // Don't allow -KS -SK, but -S or -K is required
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000273 opt_complementary = "K:S:?K--S:S--K";
274 flags = getopt32(argc, argv, "KS...);
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000275
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000276
Denis Vlasenkof0d6cc82006-09-29 13:56:58 +0000277 Don't forget to use ':'. For example, "?322-22-23X-x-a"
278 is interpreted as "?3:22:-2:2-2:2-3Xa:2--x" -
279 max 3 args; count uses of '-2'; min 2 args; if there is
280 a '-2' option then unset '-3', '-X' and '-a'; if there is
281 a '-2' and after it a '-x' then error out.
Eric Andersen8876fb22003-06-20 09:01:58 +0000282*/
283
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000284/* Code here assumes that 'unsigned' is at least 32 bits wide */
285
286const char *opt_complementary;
Eric Andersen8876fb22003-06-20 09:01:58 +0000287
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000288typedef struct {
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000289 int opt;
290 int list_flg;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000291 unsigned switch_on;
292 unsigned switch_off;
293 unsigned incongruously;
294 unsigned requires;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000295 void **optarg; /* char **optarg or llist_t **optarg */
"Vladimir N. Oleynik"be0ed3d2005-10-04 16:48:26 +0000296 int *counter;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000297} t_complementary;
Eric Andersen8876fb22003-06-20 09:01:58 +0000298
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000299/* You can set applet_long_options for parse called long options */
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000300#if ENABLE_GETOPT_LONG
Eric Andersen8876fb22003-06-20 09:01:58 +0000301static const struct option bb_default_long_options[] = {
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000302/* { "help", 0, NULL, '?' }, */
Eric Andersen8876fb22003-06-20 09:01:58 +0000303 { 0, 0, 0, 0 }
304};
305
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000306const struct option *applet_long_options = bb_default_long_options;
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000307#endif
Eric Andersen8876fb22003-06-20 09:01:58 +0000308
Denis Vlasenkoc12f5302006-10-06 09:49:47 +0000309uint32_t option_mask32;
310
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000311uint32_t
312getopt32(int argc, char **argv, const char *applet_opts, ...)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000313{
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000314 unsigned flags = 0;
315 unsigned requires = 0;
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000316 t_complementary complementary[33];
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000317 int c;
318 const unsigned char *s;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000319 t_complementary *on_off;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000320 va_list p;
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000321#if ENABLE_GETOPT_LONG
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000322 const struct option *l_o;
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000323#endif
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000324 unsigned trigger;
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000325 char **pargv = NULL;
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000326 int min_arg = 0;
327 int max_arg = -1;
Manuel Novoa III cad53642003-03-19 09:13:01 +0000328
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000329#define SHOW_USAGE_IF_ERROR 1
330#define ALL_ARGV_IS_OPTS 2
331#define FIRST_ARGV_IS_OPT 4
332#define FREE_FIRST_ARGV_IS_OPT 8
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000333 int spec_flgs = 0;
334
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000335 va_start(p, applet_opts);
Eric Andersen8876fb22003-06-20 09:01:58 +0000336
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000337 c = 0;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000338 on_off = complementary;
339 memset(on_off, 0, sizeof(complementary));
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000340
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000341 /* skip GNU extension */
"Vladimir N. Oleynik"bf968f72005-12-02 10:10:28 +0000342 s = (const unsigned char *)applet_opts;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000343 if (*s == '+' || *s == '-')
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000344 s++;
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000345 while (*s) {
346 if (c >= 32) break;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000347 on_off->opt = *s;
348 on_off->switch_on = (1 << c);
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000349 if (*++s == ':') {
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000350 on_off->optarg = va_arg(p, void **);
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000351 while (*++s == ':') /* skip */;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000352 }
353 on_off++;
354 c++;
Eric Andersen8876fb22003-06-20 09:01:58 +0000355 }
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000356
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000357#if ENABLE_GETOPT_LONG
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000358 for (l_o = applet_long_options; l_o->name; l_o++) {
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000359 if (l_o->flag)
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000360 continue;
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000361 for (on_off = complementary; on_off->opt != 0; on_off++)
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000362 if (on_off->opt == l_o->val)
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000363 goto next_long;
364 if (c >= 32) break;
365 on_off->opt = l_o->val;
366 on_off->switch_on = (1 << c);
367 if (l_o->has_arg != no_argument)
368 on_off->optarg = va_arg(p, void **);
369 c++;
370 next_long: ;
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000371 }
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000372#endif /* ENABLE_GETOPT_LONG */
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000373 for (s = (const unsigned char *)opt_complementary; s && *s; s++) {
374 t_complementary *pair;
375 unsigned *pair_switch;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000376
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000377 if (*s == ':')
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000378 continue;
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000379 c = s[1];
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000380 if (*s == '?') {
381 if (c < '0' || c > '9') {
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000382 spec_flgs |= SHOW_USAGE_IF_ERROR;
383 } else {
384 max_arg = c - '0';
385 s++;
386 }
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000387 continue;
388 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000389 if (*s == '-') {
390 if (c < '0' || c > '9') {
391 if (c == '-') {
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000392 spec_flgs |= FIRST_ARGV_IS_OPT;
393 s++;
394 } else
395 spec_flgs |= ALL_ARGV_IS_OPTS;
396 } else {
397 min_arg = c - '0';
398 s++;
399 }
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000400 continue;
401 }
Denis Vlasenko456fa6c2006-10-20 18:36:55 +0000402 if (*s == '=') {
403 min_arg = max_arg = c - '0';
404 s++;
405 continue;
406 }
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000407 for (on_off = complementary; on_off->opt; on_off++)
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000408 if (on_off->opt == *s)
409 break;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000410 if (c == ':' && s[2] == ':') {
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000411 on_off->list_flg++;
412 continue;
413 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000414 if (c == ':' || c == '\0') {
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000415 requires |= on_off->switch_on;
416 continue;
417 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000418 if (c == '-' && (s[2] == ':' || s[2] == '\0')) {
"Vladimir N. Oleynik"4fc92202006-02-02 14:48:54 +0000419 flags |= on_off->switch_on;
420 on_off->incongruously |= on_off->switch_on;
421 s++;
422 continue;
423 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000424 if (c == *s) {
425 on_off->counter = va_arg(p, int *);
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000426 s++;
427 }
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000428 pair = on_off;
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000429 pair_switch = &(pair->switch_on);
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000430 for (s++; *s && *s != ':'; s++) {
431 if (*s == '?') {
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000432 pair_switch = &(pair->requires);
433 } else if (*s == '-') {
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000434 if (pair_switch == &(pair->switch_off))
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000435 pair_switch = &(pair->incongruously);
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000436 else
437 pair_switch = &(pair->switch_off);
438 } else {
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000439 for (on_off = complementary; on_off->opt; on_off++)
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000440 if (on_off->opt == *s) {
441 *pair_switch |= on_off->switch_on;
442 break;
443 }
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000444 }
445 }
446 s--;
Eric Andersen8876fb22003-06-20 09:01:58 +0000447 }
Denis Vlasenkoff131b92007-04-10 15:42:06 +0000448 va_end(p);
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000449
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000450 if (spec_flgs & FIRST_ARGV_IS_OPT) {
451 if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0') {
Rob Landleyd921b2e2006-08-03 15:41:12 +0000452 argv[1] = xasprintf("-%s", argv[1]);
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000453 if (ENABLE_FEATURE_CLEAN_UP)
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000454 spec_flgs |= FREE_FIRST_ARGV_IS_OPT;
455 }
456 }
Denis Vlasenko24af7202007-03-15 13:28:46 +0000457
458 /* In case getopt32 was already called, reinit some state */
459 optind = 1;
Denis Vlasenko3f3aa2a2007-04-09 21:35:07 +0000460 /* optarg = NULL; opterr = 0; optopt = 0; ?? */
Denis Vlasenko24af7202007-03-15 13:28:46 +0000461
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000462 /* Note: just "getopt() <= 0" will not work good for
463 * "fake" short options, like this one:
464 * wget $'-\203' "Test: test" http://kernel.org/
465 * (supposed to act as --header, but doesn't) */
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000466#if ENABLE_GETOPT_LONG
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000467 while ((c = getopt_long(argc, argv, applet_opts,
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000468 applet_long_options, NULL)) != -1) {
Bernhard Reutner-Fischerf9437aa2006-05-31 14:12:51 +0000469#else
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000470 while ((c = getopt(argc, argv, applet_opts)) != -1) {
Denis Vlasenko24af7202007-03-15 13:28:46 +0000471#endif
Denis Vlasenkoc8400a22006-10-25 00:33:44 +0000472 c &= 0xff; /* fight libc's sign extends */
Denis Vlasenko24af7202007-03-15 13:28:46 +0000473 loop_arg_is_opt:
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000474 for (on_off = complementary; on_off->opt != c; on_off++) {
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000475 /* c==0 if long opt have non NULL flag */
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000476 if (on_off->opt == 0 && c != 0)
477 bb_show_usage();
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000478 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000479 if (flags & on_off->incongruously) {
480 if ((spec_flgs & SHOW_USAGE_IF_ERROR))
481 bb_show_usage();
Mike Frysinger348e84c2005-05-11 00:39:03 +0000482 flags |= BB_GETOPT_ERROR;
"Vladimir N. Oleynik"27421a12005-09-05 14:46:07 +0000483 }
"Vladimir N. Oleynik"45a8ed82005-09-06 16:08:33 +0000484 trigger = on_off->switch_on & on_off->switch_off;
485 flags &= ~(on_off->switch_off ^ trigger);
486 flags |= on_off->switch_on ^ trigger;
487 flags ^= trigger;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000488 if (on_off->counter)
"Vladimir N. Oleynik"be0ed3d2005-10-04 16:48:26 +0000489 (*(on_off->counter))++;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000490 if (on_off->list_flg) {
Denis Vlasenko8d9f4952007-04-08 15:08:42 +0000491 llist_add_to_end((llist_t **)(on_off->optarg), optarg);
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000492 } else if (on_off->optarg) {
493 *(char **)(on_off->optarg) = optarg;
494 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000495 if (pargv != NULL)
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000496 break;
497 }
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000498
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000499 if (spec_flgs & ALL_ARGV_IS_OPTS) {
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000500 /* process argv is option, for example "ps" applet */
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000501 if (pargv == NULL)
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000502 pargv = argv + optind;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000503 while (*pargv) {
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000504 c = **pargv;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000505 if (c == '\0') {
"Vladimir N. Oleynik"35939d92005-10-05 10:52:47 +0000506 pargv++;
507 } else {
508 (*pargv)++;
509 goto loop_arg_is_opt;
510 }
511 }
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000512 }
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000513
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000514#if (ENABLE_AR || ENABLE_TAR) && ENABLE_FEATURE_CLEAN_UP
515 if (spec_flgs & FREE_FIRST_ARGV_IS_OPT)
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000516 free(argv[1]);
517#endif
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000518 /* check depending requires for given options */
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000519 for (on_off = complementary; on_off->opt; on_off++) {
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000520 if (on_off->requires && (flags & on_off->switch_on) &&
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000521 (flags & on_off->requires) == 0)
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000522 bb_show_usage();
"Vladimir N. Oleynik"064f04e2005-10-11 14:38:01 +0000523 }
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000524 if (requires && (flags & requires) == 0)
525 bb_show_usage();
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000526 argc -= optind;
Denis Vlasenkob02ef822006-09-29 08:23:42 +0000527 if (argc < min_arg || (max_arg >= 0 && argc > max_arg))
528 bb_show_usage();
Denis Vlasenkoc12f5302006-10-06 09:49:47 +0000529
530 option_mask32 = flags;
Mike Frysinger2bf88a82005-04-18 22:42:58 +0000531 return flags;
Manuel Novoa III cad53642003-03-19 09:13:01 +0000532}