1 /* 2 * Copyright (c) 1987, 1993 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 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)getopt.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 #ifndef __STDC__ 35 #define const 36 #endif 37 #include <config.h> 38 #include "roken.h" 39 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 /* 45 * get option letter from argument vector 46 */ 47 ROKEN_LIB_VARIABLE int opterr = 1; /* if error message should be printed */ 48 ROKEN_LIB_VARIABLE int optind = 1; /* index into parent argv vector */ 49 ROKEN_LIB_VARIABLE int optopt; /* character checked for validity */ 50 int optreset; /* reset getopt */ 51 ROKEN_LIB_VARIABLE char *optarg; /* argument associated with option */ 52 53 #define BADCH (int)'?' 54 #define BADARG (int)':' 55 #define EMSG "" 56 57 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 58 getopt(int nargc, char * const *nargv, const char *ostr) 59 { 60 static char *place = EMSG; /* option letter processing */ 61 char *oli; /* option letter list index */ 62 char *p; 63 64 if (optreset || !*place) { /* update scanning pointer */ 65 optreset = 0; 66 if (optind >= nargc || *(place = nargv[optind]) != '-') { 67 place = EMSG; 68 return(-1); 69 } 70 if (place[1] && *++place == '-') { /* found "--" */ 71 ++optind; 72 place = EMSG; 73 return(-1); 74 } 75 } /* option letter okay? */ 76 if ((optopt = (int)*place++) == (int)':' || 77 !(oli = strchr(ostr, optopt))) { 78 /* 79 * if the user didn't specify '-' as an option, 80 * assume it means -1 (EOF). 81 */ 82 if (optopt == (int)'-') 83 return(-1); 84 if (!*place) 85 ++optind; 86 if (opterr && *ostr != ':') { 87 if (!(p = strrchr(*nargv, '/'))) 88 p = *nargv; 89 else 90 ++p; 91 fprintf(stderr, "%s: illegal option -- %c\n", 92 p, optopt); 93 } 94 return(BADCH); 95 } 96 if (*++oli != ':') { /* don't need argument */ 97 optarg = NULL; 98 if (!*place) 99 ++optind; 100 } 101 else { /* need an argument */ 102 if (*place) /* no white space */ 103 optarg = place; 104 else if (nargc <= ++optind) { /* no arg */ 105 place = EMSG; 106 if (!(p = strrchr(*nargv, '/'))) 107 p = *nargv; 108 else 109 ++p; 110 if (*ostr == ':') 111 return(BADARG); 112 if (opterr) 113 fprintf(stderr, 114 "%s: option requires an argument -- %c\n", 115 p, optopt); 116 return(BADCH); 117 } 118 else /* white space */ 119 optarg = nargv[optind]; 120 place = EMSG; 121 ++optind; 122 } 123 return(optopt); /* dump back option letter */ 124 } 125