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 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "namespace.h" 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include "un-namespace.h" 45 46 #include "libc_private.h" 47 48 int opterr = 1, /* if error message should be printed */ 49 optind = 1, /* index into parent argv vector */ 50 optopt, /* character checked for validity */ 51 optreset; /* reset getopt */ 52 char *optarg; /* argument associated with option */ 53 54 #define BADCH (int)'?' 55 #define BADARG (int)':' 56 #define EMSG "" 57 58 /* 59 * getopt -- 60 * Parse argc/argv argument vector. 61 */ 62 int 63 getopt(nargc, nargv, ostr) 64 int nargc; 65 char * const *nargv; 66 const char *ostr; 67 { 68 static char *place = EMSG; /* option letter processing */ 69 char *oli; /* option letter list index */ 70 71 if (optreset || !*place) { /* update scanning pointer */ 72 optreset = 0; 73 if (optind >= nargc || *(place = nargv[optind]) != '-') { 74 place = EMSG; 75 return (-1); 76 } 77 if (place[1] && *++place == '-') { /* found "--" */ 78 ++optind; 79 place = EMSG; 80 return (-1); 81 } 82 } /* option letter okay? */ 83 if ((optopt = (int)*place++) == (int)':' || 84 !(oli = strchr(ostr, optopt))) { 85 /* 86 * if the user didn't specify '-' as an option, 87 * assume it means -1. 88 */ 89 if (optopt == (int)'-') 90 return (-1); 91 if (!*place) 92 ++optind; 93 if (opterr && *ostr != ':' && optopt != BADCH) 94 (void)fprintf(stderr, "%s: illegal option -- %c\n", 95 _getprogname(), optopt); 96 return (BADCH); 97 } 98 if (*++oli != ':') { /* don't need argument */ 99 optarg = NULL; 100 if (!*place) 101 ++optind; 102 } 103 else { /* need an argument */ 104 if (*place) /* no white space */ 105 optarg = place; 106 else if (nargc <= ++optind) { /* no arg */ 107 place = EMSG; 108 if (*ostr == ':') 109 return (BADARG); 110 if (opterr) 111 (void)fprintf(stderr, 112 "%s: option requires an argument -- %c\n", 113 _getprogname(), optopt); 114 return (BADCH); 115 } 116 else /* white space */ 117 optarg = nargv[optind]; 118 place = EMSG; 119 ++optind; 120 } 121 return (optopt); /* dump back option letter */ 122 } 123