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 #include "getopt.h" 43 44 int opterr = 1, /* if error message should be printed */ 45 optind = 1, /* index into parent argv vector */ 46 optopt, /* character checked for validity */ 47 optreset; /* reset getopt */ 48 char *optarg; /* argument associated with option */ 49 50 #define BADCH (int)'?' 51 #define BADARG (int)':' 52 #define EMSG "" 53 54 /* 55 * getopt -- 56 * Parse argc/argv argument vector. 57 */ 58 int 59 getopt(nargc, nargv, ostr) 60 int nargc; 61 char * const *nargv; 62 const char *ostr; 63 { 64 char *cp; 65 static char *__progname; 66 static char *place = EMSG; /* option letter processing */ 67 char *oli; /* option letter list index */ 68 69 if (__progname == NULL) { 70 if ((cp = strrchr(nargv[0], '/')) != NULL) 71 __progname = cp + 1; 72 else 73 __progname = nargv[0]; 74 } 75 if (optreset || !*place) { /* update scanning pointer */ 76 optreset = 0; 77 if (optind >= nargc || *(place = nargv[optind]) != '-') { 78 place = EMSG; 79 return (-1); 80 } 81 if (place[1] && *++place == '-') { /* found "--" */ 82 ++optind; 83 place = EMSG; 84 return (-1); 85 } 86 } /* option letter okay? */ 87 if ((optopt = (int)*place++) == (int)':' || 88 !(oli = strchr(ostr, optopt))) { 89 /* 90 * if the user didn't specify '-' as an option, 91 * assume it means -1. 92 */ 93 if (optopt == (int)'-') 94 return (-1); 95 if (!*place) 96 ++optind; 97 if (opterr && *ostr != ':') 98 (void)fprintf(stderr, 99 "%s: illegal option -- %c\n", __progname, optopt); 100 return (BADCH); 101 } 102 if (*++oli != ':') { /* don't need argument */ 103 optarg = NULL; 104 if (!*place) 105 ++optind; 106 } 107 else { /* need an argument */ 108 if (*place) /* no white space */ 109 optarg = place; 110 else if (nargc <= ++optind) { /* no arg */ 111 place = EMSG; 112 if (*ostr == ':') 113 return (BADARG); 114 if (opterr) 115 (void)fprintf(stderr, 116 "%s: option requires an argument -- %c\n", 117 __progname, optopt); 118 return (BADCH); 119 } 120 else /* white space */ 121 optarg = nargv[optind]; 122 place = EMSG; 123 ++optind; 124 } 125 return (optopt); /* dump back option letter */ 126 } 127
