1 /* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
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35 * @(#)getopt.c 8.3 (Berkeley) 4/27/95
36 * $FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.2.2.2 2001/08/26 03:36:04 jkoshy Exp $
37 * $DragonFly: src/lib/libc/stdlib/getopt.c,v 1.3 2004/07/15 04:10:33 hmp Exp $
44 int opterr = 1, /* if error message should be printed */
45 optind = 1, /* index into parent argv vector */
46 optopt, /* character checked for validity */
47 optreset; /* reset getopt */
48 char *optarg; /* argument associated with option */
50 #define BADCH (int)'?'
51 #define BADARG (int)':'
56 * Parse argc/argv argument vector.
59 getopt(nargc, nargv, ostr)
64 static char *place = EMSG; /* option letter processing */
65 char *oli; /* option letter list index */
67 if (optreset || *place == 0) { /* update scanning pointer */
69 place = nargv[optind];
70 if (optind >= nargc || *place++ != '-') {
71 /* Argument is absent or is not an option */
76 if (optopt == '-' && *place == 0) {
77 /* "--" => end of options */
83 /* Solitary '-', treat as a '-' option
84 if the program (eg su) is looking for it. */
86 if (strchr(ostr, '-') == NULL)
93 /* See if option letter is one the caller wanted... */
94 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
97 if (opterr && *ostr != ':')
99 "%s: illegal option -- %c\n", getprogname(),
104 /* Does this option need an argument? */
106 /* don't need argument */
111 /* Option-argument is either the rest of this argument or the
112 entire next argument. */
115 else if (nargc > ++optind)
116 optarg = nargv[optind];
118 /* option-argument absent */
123 (void)fprintf(stderr,
124 "%s: option requires an argument -- %c\n",
125 getprogname(), optopt);
131 return (optopt); /* return option letter */