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33 * @(#)getopt.c 8.3 (Berkeley) 4/27/95
39 int opterr = 1, /* if error message should be printed */
40 optind = 1, /* index into parent argv vector */
41 optopt, /* character checked for validity */
42 optreset; /* reset getopt */
43 char *optarg; /* argument associated with option */
45 #define BADCH (int)'?'
46 #define BADARG (int)':'
51 * Parse argc/argv argument vector.
54 getopt(nargc, nargv, ostr)
59 static char *place = EMSG; /* option letter processing */
60 char *oli; /* option letter list index */
62 if (optreset || !*place) { /* update scanning pointer */
64 if (optind >= nargc || *(place = nargv[optind]) != '-') {
68 if (place[1] && *++place == '-') { /* found "--" */
73 } /* option letter okay? */
74 if ((optopt = (int)*place++) == (int)':' ||
75 !(oli = strchr(ostr, optopt))) {
77 * if the user didn't specify '-' as an option,
80 if (optopt == (int)'-')
84 if (opterr && *ostr != ':')
85 (void)printf("illegal option -- %c\n", optopt);
88 if (*++oli != ':') { /* don't need argument */
93 else { /* need an argument */
94 if (*place) /* no white space */
96 else if (nargc <= ++optind) { /* no arg */
101 (void)printf("option requires an argument -- %c\n", optopt);
104 else /* white space */
105 optarg = nargv[optind];
109 return (optopt); /* dump back option letter */