1 /* $NetBSD: getopt.c,v 1.24 2002/06/21 09:56:33 wiz Exp $ */
4 * Copyright (c) 1987, 1993, 1994
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38 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
42 __RCSID("$NetBSD: getopt.c,v 1.24 2002/06/21 09:56:33 wiz Exp $");
44 #endif /* LIBC_SCCS and not lint */
46 #include "namespace.h"
56 __weak_alias(getopt,_getopt)
59 int opterr = 1, /* if error message should be printed */
60 optind = 1, /* index into parent argv vector */
61 optopt, /* character checked for validity */
62 optreset; /* reset getopt */
63 char *optarg; /* argument associated with option */
65 #define BADCH (int)'?'
66 #define BADARG (int)':'
71 * Parse argc/argv argument vector.
74 getopt(nargc, nargv, ostr)
79 static char *place = EMSG; /* option letter processing */
80 char *oli; /* option letter list index */
82 _DIAGASSERT(nargv != NULL);
83 _DIAGASSERT(ostr != NULL);
85 if (optreset || !*place) { /* update scanning pointer */
87 if (optind >= nargc || *(place = nargv[optind]) != '-') {
91 if (place[1] && *++place == '-' /* found "--" */
92 && place[1] == '\0') {
97 } /* option letter okay? */
98 if ((optopt = (int)*place++) == (int)':' ||
99 !(oli = strchr(ostr, optopt))) {
101 * if the user didn't specify '-' as an option,
102 * assume it means -1.
104 if (optopt == (int)'-')
108 if (opterr && *ostr != ':')
109 (void)fprintf(stderr,
110 "%s: unknown option -- %c\n", getprogname(),
114 if (*++oli != ':') { /* don't need argument */
119 else { /* need an argument */
120 if (*place) /* no white space */
122 else if (nargc <= ++optind) { /* no arg */
127 (void)fprintf(stderr,
128 "%s: option requires an argument -- %c\n",
129 getprogname(), optopt);
132 else /* white space */
133 optarg = nargv[optind];
137 return (optopt); /* dump back option letter */