/*
* universal getopt_ulflags implementation for busybox
*
- * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
+ * Copyright (C) 2003-2005 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
unsigned long
bb_getopt_ulflags (int argc, char **argv, const char *applet_opts, ...)
- The command line options must be declared in const char
- *applet_opts as a string of chars, for example:
+ The command line options must be declared in const char
+ *applet_opts as a string of chars, for example:
- flags = bb_getopt_ulflags(argc, argv, "rnug");
+ flags = bb_getopt_ulflags(argc, argv, "rnug");
- If one of the given options is found, a flag value is added to
- the return value (an unsigned long).
+ If one of the given options is found, a flag value is added to
+ the return value (an unsigned long).
- The flag value is determined by the position of the char in
- applet_opts string. For example, in the above case:
+ The flag value is determined by the position of the char in
+ applet_opts string. For example, in the above case:
- flags = bb_getopt_ulflags(argc, argv, "rnug");
+ flags = bb_getopt_ulflags(argc, argv, "rnug");
- "r" will add 1 (bit 1 : 0x01)
- "n" will add 2 (bit 2 : 0x02)
- "u will add 4 (bit 3 : 0x03)
- "g" will add 8 (bit 4 : 0x04)
+ "r" will add 1 (bit 1 : 0x01)
+ "n" will add 2 (bit 2 : 0x02)
+ "u will add 4 (bit 3 : 0x03)
+ "g" will add 8 (bit 4 : 0x04)
- and so on. You can also look at the return value as a bit
- field and each option sets one of bits.
+ and so on. You can also look at the return value as a bit
+ field and each option sets one of bits.
- ":" If one of the options requires an argument, then add a ":"
- after the char in applet_opts and provide a pointer to store
- the argument. For example:
+ ":" If one of the options requires an argument, then add a ":"
+ after the char in applet_opts and provide a pointer to store
+ the argument. For example:
- char *pointer_to_arg_for_a;
- char *pointer_to_arg_for_b;
- char *pointer_to_arg_for_c;
- char *pointer_to_arg_for_d;
+ char *pointer_to_arg_for_a;
+ char *pointer_to_arg_for_b;
+ char *pointer_to_arg_for_c;
+ char *pointer_to_arg_for_d;
- flags = bb_getopt_ulflags(argc, argv, "a:b:c:d:",
- &pointer_to_arg_for_a, &pointer_to_arg_for_b,
- &pointer_to_arg_for_c, &pointer_to_arg_for_d);
+ flags = bb_getopt_ulflags(argc, argv, "a:b:c:d:",
+ &pointer_to_arg_for_a, &pointer_to_arg_for_b,
+ &pointer_to_arg_for_c, &pointer_to_arg_for_d);
- The type of the pointer (char* or llist_t *) may be controlled
- by the "*" special character that is set in the external string
- bb_opt_complementaly (see below for more info).
+ The type of the pointer (char* or llist_t *) may be controlled
+ by the "*" special character that is set in the external string
+ bb_opt_complementally (see below for more info).
static const struct option bb_default_long_options[]
- This struct allows you to define long options. The syntax for
- declaring the array is just like that of getopt's longopts.
+ This struct allows you to define long options. The syntax for
+ declaring the array is just like that of getopt's longopts.
+ (see getopt(3))
- static const struct option applet_long_options[] = {
- { "verbose", 0, 0, "v" },
- { 0, 0, 0, 0 }
- };
- bb_applet_long_options = applet_long_options;
+ static const struct option applet_long_options[] = {
+ { "verbose", 0, 0, v },
+ { 0, 0, 0, 0 }
+ };
+ bb_applet_long_options = applet_long_options;
- The first parameter is the long option name that you would pass
- to the applet (without the dashes).
+ The last argument (val) can undefined from applet_opts.
+ If you use this, then:
+ - return bit have next position after short options
+ - if has_arg is not "no_argument", use ptr for arg also
+ - bb_opt_complementally have effects for this too
- The second field determines whether the option has an argument.
- You can set this to 0, 1, or 2, or you can use the long named
- defines of no_argument, required_argument, and optional_argument.
+ Note: a good applet will make long options configurable via the
+ config process and not a required feature. The current standard
+ is to name the config option CONFIG_FEATURE_<applet>_LONG_OPTIONS.
- The third argument is used only when the long option does not
- have a corresponding short option. In that case, it should be
- an integer pointer. Otherwise (and normally), it should just
- bet set to NULL.
+const char *bb_opt_complementally
- The last argument is the corresponding short option (if there
- is one of course).
+ ":" The colon (":") is used to separate groups of two or more chars
+ and/or groups of chars and special characters (stating some
+ conditions to be checked).
- Note: a good applet will make long options configurable via the
- config process and not a required feature. The current standard
- is to name the config option CONFIG_FEATURE_<applet>_LONG_OPTIONS.
+ "abc" If groups of two or more chars are specified, the first char
+ is the main option and the other chars are secondary options.
+ Their flags will be turned on if the main option is found even
+ if they are not specifed on the command line. For example:
-const char *bb_opt_complementaly
+ bb_opt_complementally = "abc";
- ":" The colon (":") is used to separate groups of two or more chars
- and/or groups of chars and special characters (stating some
- conditions to be checked).
+ flags = bb_getopt_ulflags(argc, argv, "abcd")
- "abc" If groups of two or more chars are specified, the first char
- is the main option and the other chars are secondary options.
- Their flags will be turned on if the main option is found even
- if they are not specifed on the command line. For example:
-
- bb_opt_complementaly = "abc";
-
- flags = bb_getopt_ulflags(argc, argv, "abcd")
-
- If getopt() finds "-a" on the command line, then
- bb_getopt_ulflags's return value will be as if "-a -b -c" were
- found.
+ If getopt() finds "-a" on the command line, then
+ bb_getopt_ulflags's return value will be as if "-a -b -c" were
+ found.
Special characters:
- "-" A dash between two options causes the second of the two
- to be unset (and ignored) if it is given on the command line.
+ "-" A dash between two options causes the second of the two
+ to be unset (and ignored) if it is given on the command line.
- For example:
- The du applet has the options "-s" and "-d depth". If
- bb_getopt_ulflags finds -s, then -d is unset or if it finds -d
- then -s is unset. (Note: busybox implements the GNU
- "--max-depth" option as "-d".) To obtain this behavior, you
- set bb_opt_complementaly = "s-d:d-s". Only one flag value is
- added to bb_getopt_ulflags's return value depending on the
- position of the options on the command line. If one of the
- two options requires an argument pointer (":" in applet_opts
- as in "d:") optarg is set accordingly.
+ For example:
+ The du applet has the options "-s" and "-d depth". If
+ bb_getopt_ulflags finds -s, then -d is unset or if it finds -d
+ then -s is unset. (Note: busybox implements the GNU
+ "--max-depth" option as "-d".) To obtain this behavior, you
+ set bb_opt_complementally = "s-d:d-s". Only one flag value is
+ added to bb_getopt_ulflags's return value depending on the
+ position of the options on the command line. If one of the
+ two options requires an argument pointer (":" in applet_opts
+ as in "d:") optarg is set accordingly.
- char *smax_print_depth;
+ char *smax_print_depth;
- bb_opt_complementaly = "s-d:d-s";
- opt = bb_getopt_ulflags(argc, argv, "sd:", &smax_print_depth);
+ bb_opt_complementally = "s-d:d-s";
+ opt = bb_getopt_ulflags(argc, argv, "sd:", &smax_print_depth);
- if (opt & 2) {
- max_print_depth = bb_xgetularg10_bnd(smax_print_depth,
- 0, INT_MAX);
- }
+ if (opt & 2) {
+ max_print_depth = bb_xgetularg10_bnd(smax_print_depth,
+ 0, INT_MAX);
+ }
- "~" A tilde between two options, or between an option and a group
- of options, means that they are mutually exclusive. Unlike
- the "-" case above, an error will be forced if the options
- are used together.
+ "~" A tilde between two options, or between an option and a group
+ of options, means that they are mutually exclusive. Unlike
+ the "-" case above, an error will be forced if the options
+ are used together.
- For example:
- The cut applet must have only one type of list specified, so
- -b, -c and -f are mutally exclusive and should raise an error
- if specified together. In this case you must set
- bb_opt_complementaly = "b~cf:c~bf:f~bc". If two of the
- mutually exclusive options are found, bb_getopt_ulflags's
- return value will have the error flag set (BB_GETOPT_ERROR) so
- that we can check for it:
+ For example:
+ The cut applet must have only one type of list specified, so
+ -b, -c and -f are mutally exclusive and should raise an error
+ if specified together. In this case you must set
+ bb_opt_complementally = "b~cf:c~bf:f~bc". If two of the
+ mutually exclusive options are found, bb_getopt_ulflags's
+ return value will have the error flag set (BB_GETOPT_ERROR) so
+ that we can check for it:
- if (flags & BB_GETOPT_ERROR)
- bb_show_usage();
+ if (flags & BB_GETOPT_ERROR)
+ bb_show_usage();
- "*" A star after a char in bb_opt_complementaly means that the
- option can occur multiple times:
+ "!" If previous point set BB_GETOPT_ERROR, don`t return and call
+ previous example internally
- For example:
- The grep applet can have one or more "-e pattern" arguments.
- In this case you should use bb_getopt_ulflags() as follows:
+ "*" A star after a char in bb_opt_complementally means that the
+ option can occur multiple times:
- llist_t *patterns = NULL;
+ For example:
+ The grep applet can have one or more "-e pattern" arguments.
+ In this case you should use bb_getopt_ulflags() as follows:
- (this pointer must be initializated to NULL if the list is empty
- as required by *llist_add_to(llist_t *old_head, char *new_item).)
+ llist_t *patterns = NULL;
- bb_opt_complementaly = "e*";
+ (this pointer must be initializated to NULL if the list is empty
+ as required by *llist_add_to(llist_t *old_head, char *new_item).)
- bb_getopt_ulflags(argc, argv, "e:", &patterns);
- $ grep -e user -e root /etc/passwd
- root:x:0:0:root:/root:/bin/bash
- user:x:500:500::/home/user:/bin/bash
+ bb_opt_complementally = "e*";
+ bb_getopt_ulflags(argc, argv, "e:", &patterns);
+ $ grep -e user -e root /etc/passwd
+ root:x:0:0:root:/root:/bin/bash
+ user:x:500:500::/home/user:/bin/bash
*/
-const char *bb_opt_complementaly;
+const char *bb_opt_complementally;
typedef struct {
unsigned char opt;
unsigned long switch_off;
unsigned long incongruously;
void **optarg; /* char **optarg or llist_t **optarg */
-} t_complementaly;
+} t_complementally;
/* You can set bb_applet_long_options for parse called long options */
static const struct option bb_default_long_options[] = {
-/* { "help", 0, NULL, '?' }, */
+/* { "help", 0, NULL, '?' }, */
{ 0, 0, 0, 0 }
};
bb_getopt_ulflags (int argc, char **argv, const char *applet_opts, ...)
{
unsigned long flags = 0;
- t_complementaly complementaly[sizeof(flags) * 8 + 1];
+ t_complementally complementally[sizeof(flags) * 8 + 1];
int c;
const unsigned char *s;
- t_complementaly *on_off;
+ t_complementally *on_off;
va_list p;
+ const struct option *l_o;
+ char flg_show_usage_if_error = 0;
va_start (p, applet_opts);
s++;
c = 0;
- on_off = complementaly;
+ on_off = complementally;
for (; *s; s++) {
if(c >= (sizeof(flags)*8))
break;
c++;
}
on_off->opt = 0;
+
+ for(l_o = bb_applet_long_options; l_o->name; l_o++) {
+ for(on_off = complementally; on_off->opt != 0; on_off++)
+ if(on_off->opt == l_o->val)
+ break;
+ if(on_off->opt == 0) {
+ if(c >= (sizeof(flags)*8))
+ break;
+ on_off->opt = l_o->val;
+ on_off->switch_on = (1 << c);
+ on_off->list_flg = 0;
+ on_off->switch_off = 0;
+ on_off->incongruously = 0;
+ if(l_o->has_arg != no_argument)
+ on_off->optarg = va_arg (p, void **);
+ else
+ on_off->optarg = NULL;
+ on_off++;
+ on_off->opt = 0;
+ c++;
+ }
+ }
c = 0;
- for (s = bb_opt_complementaly; s && *s; s++) {
- t_complementaly *pair;
+ for (s = bb_opt_complementally; s && *s; s++) {
+ t_complementally *pair;
if (*s == ':') {
c = 0;
}
if (c)
continue;
- for (on_off = complementaly; on_off->opt; on_off++)
+ if(*s == '!') {
+ flg_show_usage_if_error = '!';
+ continue;
+ }
+ for (on_off = complementally; on_off->opt; on_off++)
if (on_off->opt == *s)
break;
pair = on_off;
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++)
+ for (on_off = complementally; on_off->opt; on_off++)
if (on_off->opt == *s) {
*pair_switch |= on_off->switch_on;
break;
}
while ((c = getopt_long (argc, argv, applet_opts,
- bb_applet_long_options, NULL)) > 0) {
- for (on_off = complementaly; on_off->opt != c; on_off++) {
+ bb_applet_long_options, NULL)) > 0) {
+ for (on_off = complementally; on_off->opt != c; on_off++) {
if(!on_off->opt)
bb_show_usage ();
}
- if(flags & on_off->incongruously)
+ if(flags & on_off->incongruously) {
+ if(flg_show_usage_if_error)
+ bb_show_usage ();
flags |= BB_GETOPT_ERROR;
+ }
flags &= ~on_off->switch_off;
flags |= on_off->switch_on;
if(on_off->list_flg) {
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