env -i ls -d /
Here we want env to process just the '-i', not the '-d'.
-const struct option *applet_long_options
+const char *applet_long_options
- 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))
+ This struct allows you to define long options:
- static const struct option applet_long_options[] = {
- //name,has_arg,flag,val
- { "verbose", 0, 0, 'v' },
- { 0, 0, 0, 0 }
- };
- applet_long_options = applet_long_options;
+ static const char applet_longopts[] ALIGN1 =
+ //"name\0" has_arg val
+ "verbose\0" No_argument "v"
+ ;
+ applet_long_options = applet_longopts;
The last member of struct option (val) typically is set to
matching short option from applet_opts. If there is no matching
char in applet_opts, then:
- return bit have next position after short options
- - if has_arg is not "no_argument", use ptr for arg also
+ - if has_arg is not "No_argument", use ptr for arg also
- opt_complementary affects it too
Note: a good applet will make long options configurable via the
-b, -c and -f are mutally exclusive and should raise an error
if specified together. In this case you must set
opt_complementary = "b--cf:c--bf:f--bc". If two of the
- mutually exclusive options are found, getopt32'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();
+ mutually exclusive options are found, getopt32 will call
+ bb_show_usage() and die.
"x--x" Variation of the above, it means that -x option should occur
at most once.
- "?" A "?" as the first char in a opt_complementary group means:
- if BB_GETOPT_ERROR is detected, don't return, call bb_show_usage
- and exit instead. Next char after '?' can't be a digit.
-
"::" A double colon after a char in opt_complementary means that the
option can occur multiple times. Each occurrence will be saved as
a llist_t element instead of char*.
/* You can set applet_long_options for parse called long options */
#if ENABLE_GETOPT_LONG
-static const struct option bb_default_long_options[] = {
-/* { "help", 0, NULL, '?' }, */
+static const struct option bb_null_long_options[1] = {
{ 0, 0, 0, 0 }
};
-
-const struct option *applet_long_options = bb_default_long_options;
+const char *applet_long_options;
#endif
uint32_t option_mask32;
va_list p;
#if ENABLE_GETOPT_LONG
const struct option *l_o;
+ struct option *long_options = (struct option *) &bb_null_long_options;
#endif
unsigned trigger;
char **pargv = NULL;
}
#if ENABLE_GETOPT_LONG
- for (l_o = applet_long_options; l_o->name; l_o++) {
- if (l_o->flag)
- continue;
- for (on_off = complementary; on_off->opt != 0; on_off++)
- if (on_off->opt == l_o->val)
- goto next_long;
- if (c >= 32) break;
- on_off->opt = l_o->val;
- on_off->switch_on = (1 << c);
- if (l_o->has_arg != no_argument)
- on_off->optarg = va_arg(p, void **);
- c++;
+ if (applet_long_options) {
+ const char *optstr;
+ unsigned i, count;
+
+ count = 1;
+ optstr = applet_long_options;
+ while (optstr[0]) {
+ optstr += strlen(optstr) + 3; /* skip NUL, has_arg, val */
+ count++;
+ }
+ /* count == no. of longopts + 1 */
+ long_options = alloca(count * sizeof(*long_options));
+ memset(long_options, 0, count * sizeof(*long_options));
+ i = 0;
+ optstr = applet_long_options;
+ while (--count) {
+ long_options[i].name = optstr;
+ optstr += strlen(optstr) + 1;
+ long_options[i].has_arg = (unsigned char)(*optstr++);
+ /* long_options[i].flag = NULL; */
+ long_options[i].val = (unsigned char)(*optstr++);
+ i++;
+ }
+ for (l_o = long_options; l_o->name; l_o++) {
+ if (l_o->flag)
+ continue;
+ for (on_off = complementary; on_off->opt != 0; on_off++)
+ if (on_off->opt == l_o->val)
+ goto next_long;
+ if (c >= 32) break;
+ on_off->opt = l_o->val;
+ on_off->switch_on = (1 << c);
+ if (l_o->has_arg != no_argument)
+ on_off->optarg = va_arg(p, void **);
+ c++;
next_long: ;
+ }
}
#endif /* ENABLE_GETOPT_LONG */
for (s = (const unsigned char *)opt_complementary; s && *s; s++) {
* (supposed to act as --header, but doesn't) */
#if ENABLE_GETOPT_LONG
while ((c = getopt_long(argc, argv, applet_opts,
- applet_long_options, NULL)) != -1) {
+ long_options, NULL)) != -1) {
#else
while ((c = getopt(argc, argv, applet_opts)) != -1) {
#endif
if (on_off->opt == 0 && c != 0)
bb_show_usage();
}
- if (flags & on_off->incongruously) {
- if ((spec_flgs & SHOW_USAGE_IF_ERROR))
- bb_show_usage();
- flags |= BB_GETOPT_ERROR;
- }
+ if (flags & on_off->incongruously)
+ bb_show_usage();
trigger = on_off->switch_on & on_off->switch_off;
flags &= ~(on_off->switch_off ^ trigger);
flags |= on_off->switch_on ^ trigger;
projects / oweals / busybox.git / blobdiff