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 1.7 2005/11/20 12:37:48 swildner Exp $
45 int opterr = 1, /* if error message should be printed */
46 optind = 1, /* index into parent argv vector */
47 optopt, /* character checked for validity */
48 optreset; /* reset getopt */
49 char *optarg; /* argument associated with option */
51 #define BADCH (int)'?'
52 #define BADARG (int)':'
54 static char EMSG[] = { '\0' };
58 * Parse argc/argv argument vector.
61 getopt(int nargc, char * const nargv[], const char *ostr)
63 static char *place = EMSG; /* option letter processing */
64 char *oli; /* option letter list index */
67 * Some programs like cvs expect optind = 0 to trigger
73 if (optreset || *place == 0) { /* update scanning pointer */
75 place = nargv[optind];
76 if (optind >= nargc || *place++ != '-') {
77 /* Argument is absent or is not an option */
82 if (optopt == '-' && *place == 0) {
83 /* "--" => end of options */
89 /* Solitary '-', treat as a '-' option
90 if the program (eg su) is looking for it. */
92 if (strchr(ostr, '-') == NULL)
99 /* See if option letter is one the caller wanted... */
100 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
103 if (opterr && *ostr != ':')
105 "%s: illegal option -- %c\n", getprogname(),
110 /* Does this option need an argument? */
112 /* don't need argument */
117 /* Option-argument is either the rest of this argument or the
118 entire next argument. */
121 else if (nargc > ++optind)
122 optarg = nargv[optind];
124 /* option-argument absent */
130 "%s: option requires an argument -- %c\n",
131 getprogname(), optopt);
137 return (optopt); /* return option letter */