1 /* -*- mode: c; c-file-style: "bsd"; indent-tabs-mode: t -*- */ 2 /* $NetBSD: getopt.c,v 1.16 1999/12/02 13:15:56 kleink Exp $ */ 3 4 /* 5 * Copyright (c) 1987, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if !defined(HAVE_GETOPT) || !defined(HAVE_UNISTD_H) 38 #if 0 39 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; 40 #endif 41 42 #define K5_GETOPT_C 43 44 #include <assert.h> 45 #include <errno.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include "k5-platform.h" 49 50 #define __P(x) x 51 #define _DIAGASSERT(x) assert(x) 52 53 int opterr = 1, /* if error message should be printed */ 54 optind = 1, /* index into parent argv vector */ 55 optopt; /* character checked for validity */ 56 char *optarg; /* argument associated with option */ 57 58 static char * _progname __P((char *)); 59 int getopt_internal __P((int, char * const *, const char *)); 60 61 static char * 62 _progname(nargv0) 63 char * nargv0; 64 { 65 char * tmp; 66 67 _DIAGASSERT(nargv0 != NULL); 68 69 tmp = strrchr(nargv0, '/'); 70 if (tmp) 71 tmp++; 72 else 73 tmp = nargv0; 74 return(tmp); 75 } 76 77 #define BADCH (int)'?' 78 #define BADARG (int)':' 79 #define EMSG "" 80 81 /* 82 * getopt -- 83 * Parse argc/argv argument vector. 84 */ 85 int 86 getopt(nargc, nargv, ostr) 87 int nargc; 88 char * const nargv[]; 89 const char *ostr; 90 { 91 static char *__progname = 0; 92 static char *place = EMSG; /* option letter processing */ 93 char *oli; /* option letter list index */ 94 __progname = __progname?__progname:_progname(*nargv); 95 96 _DIAGASSERT(nargv != NULL); 97 _DIAGASSERT(ostr != NULL); 98 99 if (!*place) { /* update scanning pointer */ 100 if (optind >= nargc || *(place = nargv[optind]) != '-') { 101 place = EMSG; 102 return (-1); 103 } 104 if (place[1] && *++place == '-' /* found "--" */ 105 && place[1] == '\0') { 106 ++optind; 107 place = EMSG; 108 return (-1); 109 } 110 } /* option letter okay? */ 111 if ((optopt = (int)*place++) == (int)':' || 112 !(oli = strchr(ostr, optopt))) { 113 /* 114 * if the user didn't specify '-' as an option, 115 * assume it means -1. 116 */ 117 if (optopt == (int)'-') 118 return (-1); 119 if (!*place) 120 ++optind; 121 if (opterr && *ostr != ':') 122 (void)fprintf(stderr, 123 "%s: illegal option -- %c\n", __progname, optopt); 124 return (BADCH); 125 } 126 if (*++oli != ':') { /* don't need argument */ 127 optarg = NULL; 128 if (!*place) 129 ++optind; 130 } 131 else { /* need an argument */ 132 if (*place) /* no white space */ 133 optarg = place; 134 else if (nargc <= ++optind) { /* no arg */ 135 place = EMSG; 136 if (*ostr == ':') 137 return (BADARG); 138 if (opterr) 139 (void)fprintf(stderr, 140 "%s: option requires an argument -- %c\n", 141 __progname, optopt); 142 return (BADCH); 143 } 144 else /* white space */ 145 optarg = nargv[optind]; 146 place = EMSG; 147 ++optind; 148 } 149 return (optopt); /* dump back option letter */ 150 } 151 #endif /* !defined(HAVE_GETOPT) || !defined(HAVE_UNISTD_H) */ 152