1 /* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
4 * Copyright (c) 1987, 1993, 1994
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32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include "namespace.h"
43 #include "un-namespace.h"
45 #include "libc_private.h"
47 int opterr = 1, /* if error message should be printed */
48 optind = 1, /* index into parent argv vector */
49 optopt, /* character checked for validity */
50 optreset; /* reset getopt */
51 char *optarg; /* argument associated with option */
53 #define BADCH (int)'?'
54 #define BADARG (int)':'
59 * Parse argc/argv argument vector.
62 getopt(nargc, nargv, ostr)
67 static char *place = EMSG; /* option letter processing */
68 char *oli; /* option letter list index */
70 if (optreset || *place == 0) { /* update scanning pointer */
72 place = nargv[optind];
73 if (optind >= nargc || *place++ != '-') {
74 /* Argument is absent or is not an option */
79 if (optopt == '-' && *place == 0) {
80 /* "--" => end of options */
86 /* Solitary '-', treat as a '-' option
87 if the program (eg su) is looking for it. */
89 if (strchr(ostr, '-') == NULL)
96 /* See if option letter is one the caller wanted... */
97 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
100 if (opterr && *ostr != ':')
101 (void)fprintf(stderr,
102 "%s: illegal option -- %c\n", _getprogname(),
107 /* Does this option need an argument? */
109 /* don't need argument */
114 /* Option-argument is either the rest of this argument or the
115 entire next argument. */
118 else if (nargc > ++optind)
119 optarg = nargv[optind];
121 /* option-argument absent */
126 (void)fprintf(stderr,
127 "%s: option requires an argument -- %c\n",
128 _getprogname(), optopt);
134 return (optopt); /* return option letter */