xref: /dragonfly/contrib/bmake/getopt.c (revision 279dd846)
1 /*
2  * Copyright (c) 1987, 1993, 1994
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #ifdef HAVE_CONFIG_H
35 # include "config.h"
36 #endif
37 #if !defined(HAVE_GETOPT) || defined(WANT_GETOPT_LONG) || defined(BROKEN_GETOPT)
38 
39 #if defined(LIBC_SCCS) && !defined(lint)
40 /* static char sccsid[] = "from: @(#)getopt.c	8.2 (Berkeley) 4/2/94"; */
41 static char *rcsid = "$Id: getopt.c,v 1.3 1999/01/08 02:14:18 sjg Exp $";
42 #endif /* LIBC_SCCS and not lint */
43 
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 
48 
49 #define	BADCH	(int)'?'
50 #define	BADARG	(int)':'
51 #define	EMSG	""
52 
53 int	opterr = 1,		/* if error message should be printed */
54 	optind = 1,		/* index into parent argv vector */
55 	optopt = BADCH,		/* character checked for validity */
56 	optreset;		/* reset getopt */
57 char	*optarg;		/* argument associated with option */
58 
59 /*
60  * getopt --
61  *	Parse argc/argv argument vector.
62  */
63 int
64 getopt(nargc, nargv, ostr)
65 	int nargc;
66 	char * const *nargv;
67 	const char *ostr;
68 {
69 	extern char *__progname;
70 	static char *place = EMSG;		/* option letter processing */
71 	char *oli;				/* option letter list index */
72 
73 #ifndef BSD4_4
74 	if (!__progname) {
75 		if (__progname = strrchr(nargv[0], '/'))
76 			++__progname;
77 		else
78 			__progname = nargv[0];
79 	}
80 #endif
81 
82 	if (optreset || !*place) {		/* update scanning pointer */
83 		optreset = 0;
84 		if (optind >= nargc || *(place = nargv[optind]) != '-') {
85 			place = EMSG;
86 			return (-1);
87 		}
88 		if (place[1] && *++place == '-'	/* found "--" */
89 		    && !place[1]) {		/* and not "--foo" */
90 			++optind;
91 			place = EMSG;
92 			return (-1);
93 		}
94 	}					/* option letter okay? */
95 	if ((optopt = (int)*place++) == (int)':' ||
96 	    !(oli = strchr(ostr, optopt))) {
97 		/*
98 		 * if the user didn't specify '-' as an option,
99 		 * assume it means -1.
100 		 */
101 		if (optopt == (int)'-')
102 			return (-1);
103 		if (!*place)
104 			++optind;
105 		if (opterr && *ostr != ':')
106 			(void)fprintf(stderr,
107 			    "%s: illegal option -- %c\n", __progname, optopt);
108 		return (BADCH);
109 	}
110 	if (*++oli != ':') {			/* don't need argument */
111 		optarg = NULL;
112 		if (!*place)
113 			++optind;
114 	}
115 	else {					/* need an argument */
116 		if (*place)			/* no white space */
117 			optarg = place;
118 		else if (nargc <= ++optind) {	/* no arg */
119 			place = EMSG;
120 			if (*ostr == ':')
121 				return (BADARG);
122 			if (opterr)
123 				(void)fprintf(stderr,
124 				    "%s: option requires an argument -- %c\n",
125 				    __progname, optopt);
126 			return (BADCH);
127 		}
128 	 	else				/* white space */
129 			optarg = nargv[optind];
130 		place = EMSG;
131 		++optind;
132 	}
133 	return (optopt);			/* dump back option letter */
134 }
135 #endif
136 #ifdef MAIN
137 #ifndef BSD4_4
138 char *__progname;
139 #endif
140 
141 int
142 main(argc, argv)
143 	int argc;
144 	char *argv[];
145 {
146 	int c;
147 	char *opts = argv[1];
148 
149 	--argc;
150 	++argv;
151 
152 	while ((c = getopt(argc, argv, opts)) != EOF) {
153 		switch (c) {
154 		case '-':
155 			if (optarg)
156 				printf("--%s ", optarg);
157 			break;
158 		case '?':
159 			exit(1);
160 			break;
161 		default:
162 			if (optarg)
163 				printf("-%c %s ", c, optarg);
164 			else
165 				printf("-%c ", c);
166 			break;
167 		}
168 	}
169 
170 	if (optind < argc) {
171 		printf("-- ");
172 		for (; optind < argc; ++optind) {
173 			printf("%s ", argv[optind]);
174 		}
175 	}
176 	printf("\n");
177 	exit(0);
178 }
179 #endif
180