xref: /onnv-gate/usr/src/cmd/mdb/common/libstand/getopt.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include <sys/salib.h>
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #define	EOF	(-1)
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate int opterr = 1, optind = 1, optopt = 0;
34*0Sstevel@tonic-gate char *optarg = NULL;
35*0Sstevel@tonic-gate int _sp = 1;
36*0Sstevel@tonic-gate 
37*0Sstevel@tonic-gate extern void warn(const char *, ...);
38*0Sstevel@tonic-gate 
39*0Sstevel@tonic-gate void
getopt_reset(void)40*0Sstevel@tonic-gate getopt_reset(void)
41*0Sstevel@tonic-gate {
42*0Sstevel@tonic-gate 	opterr = 1;
43*0Sstevel@tonic-gate 	optind = 1;
44*0Sstevel@tonic-gate 	optopt = 0;
45*0Sstevel@tonic-gate 	optarg = NULL;
46*0Sstevel@tonic-gate 	_sp = 1;
47*0Sstevel@tonic-gate }
48*0Sstevel@tonic-gate 
49*0Sstevel@tonic-gate int
getopt(int argc,char * const * argv,const char * opts)50*0Sstevel@tonic-gate getopt(int argc, char *const *argv, const char *opts)
51*0Sstevel@tonic-gate {
52*0Sstevel@tonic-gate 	char c;
53*0Sstevel@tonic-gate 	char *cp;
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate 	if (_sp == 1) {
56*0Sstevel@tonic-gate 		if (optind >= argc || argv[optind][0] != '-' ||
57*0Sstevel@tonic-gate 		    argv[optind] == NULL || argv[optind][1] == '\0')
58*0Sstevel@tonic-gate 			return (EOF);
59*0Sstevel@tonic-gate 		else if (strcmp(argv[optind], "--") == NULL) {
60*0Sstevel@tonic-gate 			optind++;
61*0Sstevel@tonic-gate 			return (EOF);
62*0Sstevel@tonic-gate 		}
63*0Sstevel@tonic-gate 	}
64*0Sstevel@tonic-gate 	optopt = c = (unsigned char)argv[optind][_sp];
65*0Sstevel@tonic-gate 	if (c == ':' || (cp = strchr(opts, c)) == NULL) {
66*0Sstevel@tonic-gate 		if (opts[0] != ':')
67*0Sstevel@tonic-gate 			warn("%s: illegal option -- %c\n", argv[0], c);
68*0Sstevel@tonic-gate 		if (argv[optind][++_sp] == '\0') {
69*0Sstevel@tonic-gate 			optind++;
70*0Sstevel@tonic-gate 			_sp = 1;
71*0Sstevel@tonic-gate 		}
72*0Sstevel@tonic-gate 		return ('?');
73*0Sstevel@tonic-gate 	}
74*0Sstevel@tonic-gate 
75*0Sstevel@tonic-gate 	if (*(cp + 1) == ':') {
76*0Sstevel@tonic-gate 		if (argv[optind][_sp+1] != '\0')
77*0Sstevel@tonic-gate 			optarg = &argv[optind++][_sp+1];
78*0Sstevel@tonic-gate 		else if (++optind >= argc) {
79*0Sstevel@tonic-gate 			if (opts[0] != ':') {
80*0Sstevel@tonic-gate 				warn("%s: option requires an argument"
81*0Sstevel@tonic-gate 				    " -- %c\n", argv[0], c);
82*0Sstevel@tonic-gate 			}
83*0Sstevel@tonic-gate 			_sp = 1;
84*0Sstevel@tonic-gate 			optarg = NULL;
85*0Sstevel@tonic-gate 			return (opts[0] == ':' ? ':' : '?');
86*0Sstevel@tonic-gate 		} else
87*0Sstevel@tonic-gate 			optarg = argv[optind++];
88*0Sstevel@tonic-gate 		_sp = 1;
89*0Sstevel@tonic-gate 	} else {
90*0Sstevel@tonic-gate 		if (argv[optind][++_sp] == '\0') {
91*0Sstevel@tonic-gate 			_sp = 1;
92*0Sstevel@tonic-gate 			optind++;
93*0Sstevel@tonic-gate 		}
94*0Sstevel@tonic-gate 		optarg = NULL;
95*0Sstevel@tonic-gate 	}
96*0Sstevel@tonic-gate 	return (c);
97*0Sstevel@tonic-gate }
98