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getsubopt — ???????饵?֥??ץ???????????

?饤?֥???

Standard C Library (libc, -lc)

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<unistd.h> extern char *suboptarg; int getsubopt(char **optionp, char * const *tokens, char **valuep)

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getsubopt() ?ؿ??ϡ? 1 ?Ĥޤ???ʣ???Υ??֡????ڡ????ޤ??ϥ????? (‘,’) ?????饯???ˤ??äƶ??ڤ??줿?ȡ????󤬴ޤޤ???ʸ?????????Ϥ??ޤ??? ?桼?ƥ????ƥ??Υ??ޥ??ɥ饤???ΰ????Ȥ??????Ϥ????롢 ???ץ??????????ΤޤȤޤ??????Ϥ????Τ˻??Ѥ????Τ???Ū?Ǥ???

???? optionp ?ϡ?ʸ?????ؤΥݥ??󥿤??ؤ??ݥ??󥿤Ǥ??? ???? tokens ?ϡ?ʸ?????ؤΥݥ??󥿤????ġ? NULL ?ǽ????????????ؤ??ݥ??󥿤Ǥ???

getsubopt() ?ؿ??ϡ?ʸ?????κǽ??Υȡ???????Ŭ?礹??ʸ?????򻲾Ȥ??? tokens ???????Υݥ??󥿤Ρ?0 ?Ϥޤ??Υ??ե??åȤ??֤??ޤ??? ʸ?????˥ȡ????󤬰??ڴޤޤ??ʤ????ޤ??? tokens ????Ŭ?礹??ʸ???󤬴ޤޤ??ʤ??????ˤ? -1 ???֤??ޤ???

?ȡ??????η????? ``name=value'' ?Ǥ??????硢 valuep ?ǻ??Ȥ????????ϡ? ?ȡ??????? ``value'' ????ʬ????Ƭ???ؤ??褦?????ꤵ???ޤ???

getsubopt() ???????ä????? optionp ??ʸ?????μ??Υȡ?????????Ƭ???ؤ??褦?????ꤵ???ޤ??? ?ޤ??ϡ??????ʾ??Υȡ????󤬤ʤ??????ˤϡ? ʸ?????ν??????? null ???ؤ??ޤ??? ?????ѿ? suboptarg ?ϡ????ߤΥȡ?????????Ƭ???ؤ??褦?????ꤵ???ޤ??? ?ȡ????󤬤ʤ??ä??????ϡ? NULL ?Ȥʤ??ޤ??? ???? valuep ?ϡ??ȡ??????? ``value'' ????ʬ?򼨤??褦?????ꤵ???ޤ??? ?ޤ??ϡ?``value'' ??ʬ???ʤ??ä??????? NULL ?Ȥʤ??ޤ???

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char *tokens[] = {
	#define ONE	0
		"one",
	#define TWO	1
		"two",
	NULL
};

...

extern char *optarg, *suboptarg;
char *option, *value;

while ((ch = getopt(argc, argv, "ab:")) != -1) {
	switch(ch) {
	case 'a':
		/*  ``a'' ???ץ??????????? */
		break;
	case 'b':
		option = optarg;
		while (*option) {
			switch(getsubopt(&option, tokens, &value)) {
			case ONE:
				/* ``one'' ???֥??ץ??????????? */
				break;
			case TWO:
				/* ``two'' ???֥??ץ??????????? */
				if (!value)
					error("no value for two");
				i = atoi(value);
				break;
			case -1:
				if (suboptarg)
					error("illegal sub option %s",
					  suboptarg);
				else
					error("missing sub option");
				break;
		}
		break;
	}

??Ϣ????

getopt(3), strsep(3)

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getsubopt() ?ؿ??? 4.4BSD ?ǤϤ??????о줷?ޤ?????