1 /* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
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31 * @(#)getopt.c 8.3 (Berkeley) 4/27/95
32 * $FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.8 2007/01/09 00:28:10 imp Exp $
33 * $DragonFly: src/lib/libc/stdlib/getopt.c,v 1.7 2005/11/20 12:37:48 swildner Exp $
36 #include "namespace.h"
41 #include "un-namespace.h"
43 #include "libc_private.h"
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 */