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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #if defined(LIBC_SCCS) && !defined(lint) 34 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include "stand.h" 38 #include <string.h> 39 40 int opterr = 1, /* if error message should be printed */ 41 optind = 1, /* index into parent argv vector */ 42 optopt, /* character checked for validity */ 43 optreset; /* reset getopt */ 44 char *optarg; /* argument associated with option */ 45 46 #define BADCH (int)'?' 47 #define BADARG (int)':' 48 #define EMSG "" 49 50 /* 51 * getopt -- 52 * Parse argc/argv argument vector. 53 */ 54 int 55 getopt(int nargc, char * const *nargv, const char *ostr) 56 { 57 static char *place = EMSG; /* option letter processing */ 58 char *oli; /* option letter list index */ 59 60 if (optreset || !*place) { /* update scanning pointer */ 61 optreset = 0; 62 if (optind >= nargc || *(place = nargv[optind]) != '-') { 63 place = EMSG; 64 return (-1); 65 } 66 if (place[1] && *++place == '-') { /* found "--" */ 67 ++optind; 68 place = EMSG; 69 return (-1); 70 } 71 } /* option letter okay? */ 72 if ((optopt = (int)*place++) == (int)':' || 73 !(oli = strchr(ostr, optopt))) { 74 /* 75 * if the user didn't specify '-' as an option, 76 * assume it means -1. 77 */ 78 if (optopt == (int)'-') 79 return (-1); 80 if (!*place) 81 ++optind; 82 if (opterr && *ostr != ':') 83 (void)printf("illegal option -- %c\n", optopt); 84 return (BADCH); 85 } 86 if (*++oli != ':') { /* don't need argument */ 87 optarg = NULL; 88 if (!*place) 89 ++optind; 90 } 91 else { /* need an argument */ 92 if (*place) /* no white space */ 93 optarg = place; 94 else if (nargc <= ++optind) { /* no arg */ 95 place = EMSG; 96 if (*ostr == ':') 97 return (BADARG); 98 if (opterr) 99 (void)printf("option requires an argument -- %c\n", optopt); 100 return (BADCH); 101 } 102 else /* white space */ 103 optarg = nargv[optind]; 104 place = EMSG; 105 ++optind; 106 } 107 return (optopt); /* dump back option letter */ 108 } 109