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 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 int opterr = 1, /* if error message should be printed */ 43 optind = 1, /* index into parent argv vector */ 44 optopt, /* character checked for validity */ 45 optreset; /* reset getopt */ 46 char *optarg; /* argument associated with option */ 47 48 #define BADCH (int)'?' 49 #define BADARG (int)':' 50 #define EMSG "" 51 52 /* 53 * getopt -- 54 * Parse argc/argv argument vector. 55 */ 56 int 57 getopt(nargc, nargv, ostr) 58 int nargc; 59 char * const *nargv; 60 const char *ostr; 61 { 62 #ifdef WIN32 63 char *__progname="windump"; 64 #else 65 extern char *__progname; 66 #endif 67 static char *place = EMSG; /* option letter processing */ 68 char *oli; /* option letter list index */ 69 70 if (optreset || !*place) { /* update scanning pointer */ 71 optreset = 0; 72 if (optind >= nargc || *(place = nargv[optind]) != '-') { 73 place = EMSG; 74 return (-1); 75 } 76 if (place[1] && *++place == '-') { /* found "--" */ 77 ++optind; 78 place = EMSG; 79 return (-1); 80 } 81 } /* option letter okay? */ 82 if ((optopt = (int)*place++) == (int)':' || 83 !(oli = strchr(ostr, optopt))) { 84 /* 85 * if the user didn't specify '-' as an option, 86 * assume it means -1. 87 */ 88 if (optopt == (int)'-') 89 return (-1); 90 if (!*place) 91 ++optind; 92 if (opterr && *ostr != ':') 93 (void)fprintf(stderr, 94 "%s: illegal option -- %c\n", __progname, optopt); 95 return (BADCH); 96 } 97 if (*++oli != ':') { /* don't need argument */ 98 optarg = NULL; 99 if (!*place) 100 ++optind; 101 } 102 else { /* need an argument */ 103 if (*place) /* no white space */ 104 optarg = place; 105 else if (nargc <= ++optind) { /* no arg */ 106 place = EMSG; 107 if (*ostr == ':') 108 return (BADARG); 109 if (opterr) 110 (void)fprintf(stderr, 111 "%s: option requires an argument -- %c\n", 112 __progname, optopt); 113 return (BADCH); 114 } 115 else /* white space */ 116 optarg = nargv[optind]; 117 place = EMSG; 118 ++optind; 119 } 120 return (optopt); /* dump back option letter */ 121 } 122
