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33 * @(#)getopt.c 8.3 (Berkeley) 4/27/95
34 * $FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.2.2.2 2001/08/26 03:36:04 jkoshy Exp $
35 * $DragonFly: src/lib/libc/stdlib/getopt.c,v 1.2 2003/06/17 04:26:46 dillon Exp $
42 int opterr = 1, /* if error message should be printed */
43 optind = 1, /* index into parent argv vector */
44 optopt, /* character checked for validity */
45 optreset; /* reset getopt */
46 char *optarg; /* argument associated with option */
48 #define BADCH (int)'?'
49 #define BADARG (int)':'
54 * Parse argc/argv argument vector.
57 getopt(nargc, nargv, ostr)
62 extern char *__progname;
63 static char *place = EMSG; /* option letter processing */
64 char *oli; /* option letter list index */
66 if (optreset || !*place) { /* update scanning pointer */
68 if (optind >= nargc || *(place = nargv[optind]) != '-') {
72 if (place[1] && *++place == '-') { /* found "--" */
77 } /* option letter okay? */
78 if ((optopt = (int)*place++) == (int)':' ||
79 !(oli = strchr(ostr, optopt))) {
81 * if the user didn't specify '-' as an option,
84 if (optopt == (int)'-')
88 if (opterr && *ostr != ':' && optopt != BADCH)
90 "%s: illegal option -- %c\n", __progname, optopt);
93 if (*++oli != ':') { /* don't need argument */
98 else { /* need an argument */
99 if (*place) /* no white space */
101 else if (nargc <= ++optind) { /* no arg */
106 (void)fprintf(stderr,
107 "%s: option requires an argument -- %c\n",
111 else /* white space */
112 optarg = nargv[optind];
116 return (optopt); /* dump back option letter */