| | 1 | /* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */ |
| | 2 | |
| | 3 | /* |
| | 4 | * Copyright (c) 1987, 1993, 1994 |
| | 5 | * The Regents of the University of California. All rights reserved. |
| | 6 | * |
| | 7 | * Redistribution and use in source and binary forms, with or without |
| | 8 | * modification, are permitted provided that the following conditions |
| | 9 | * are met: |
| | 10 | * 1. Redistributions of source code must retain the above copyright |
| | 11 | * notice, this list of conditions and the following disclaimer. |
| | 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 13 | * notice, this list of conditions and the following disclaimer in the |
| | 14 | * documentation and/or other materials provided with the distribution. |
| | 15 | * 3. All advertising materials mentioning features or use of this software |
| | 16 | * must display the following acknowledgement: |
| | 17 | * This product includes software developed by the University of |
| | 18 | * California, Berkeley and its contributors. |
| | 19 | * 4. Neither the name of the University nor the names of its contributors |
| | 20 | * may be used to endorse or promote products derived from this software |
| | 21 | * without specific prior written permission. |
| | 22 | * |
| | 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 33 | * SUCH DAMAGE. |
| | 34 | */ |
| | 35 | |
| | 36 | #if defined(LIBC_SCCS) && !defined(lint) |
| | 37 | static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; |
| | 38 | #endif /* LIBC_SCCS and not lint */ |
| | 39 | #include <sys/cdefs.h> |
| | 40 | __FBSDID("$FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.7 2004/03/06 17:05:45 ache Exp $"); |
| | 41 | |
| | 42 | #include "namespace.h" |
| | 43 | #include <stdio.h> |
| | 44 | #include <stdlib.h> |
| | 45 | #include <string.h> |
| | 46 | #include <unistd.h> |
| | 47 | #include "un-namespace.h" |
| | 48 | |
| | 49 | #include "libc_private.h" |
| | 50 | |
| | 51 | int opterr = 1, /* if error message should be printed */ |
| | 52 | optind = 1, /* index into parent argv vector */ |
| | 53 | optopt, /* character checked for validity */ |
| | 54 | optreset; /* reset getopt */ |
| | 55 | char *optarg; /* argument associated with option */ |
| | 56 | |
| | 57 | #define BADCH (int)'?' |
| | 58 | #define BADARG (int)':' |
| | 59 | #define EMSG "" |
| | 60 | |
| | 61 | /* |
| | 62 | * getopt -- |
| | 63 | * Parse argc/argv argument vector. |
| | 64 | */ |
| | 65 | int |
| | 66 | getopt(nargc, nargv, ostr) |
| | 67 | int nargc; |
| | 68 | char * const nargv[]; |
| | 69 | const char *ostr; |
| | 70 | { |
| | 71 | static char *place = EMSG; /* option letter processing */ |
| | 72 | char *oli; /* option letter list index */ |
| | 73 | |
| | 74 | if (optreset || *place == 0) { /* update scanning pointer */ |
| | 75 | optreset = 0; |
| | 76 | place = nargv[optind]; |
| | 77 | if (optind >= nargc || *place++ != '-') { |
| | 78 | /* Argument is absent or is not an option */ |
| | 79 | place = EMSG; |
| | 80 | return (-1); |
| | 81 | } |
| | 82 | optopt = *place++; |
| | 83 | if (optopt == '-' && *place == 0) { |
| | 84 | /* "--" => end of options */ |
| | 85 | ++optind; |
| | 86 | place = EMSG; |
| | 87 | return (-1); |
| | 88 | } |
| | 89 | if (optopt == 0) { |
| | 90 | /* Solitary '-', treat as a '-' option |
| | 91 | if the program (eg su) is looking for it. */ |
| | 92 | place = EMSG; |
| | 93 | if (strchr(ostr, '-') == NULL) |
| | 94 | return (-1); |
| | 95 | optopt = '-'; |
| | 96 | } |
| | 97 | } else |
| | 98 | optopt = *place++; |
| | 99 | |
| | 100 | /* See if option letter is one the caller wanted... */ |
| | 101 | if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) { |
| | 102 | if (*place == 0) |
| | 103 | ++optind; |
| | 104 | if (opterr && *ostr != ':') |
| | 105 | (void)fprintf(stderr, |
| | 106 | "%s: illegal option -- %c\n", _getprogname(), |
| | 107 | optopt); |
| | 108 | return (BADCH); |
| | 109 | } |
| | 110 | |
| | 111 | /* Does this option need an argument? */ |
| | 112 | if (oli[1] != ':') { |
| | 113 | /* don't need argument */ |
| | 114 | optarg = NULL; |
| | 115 | if (*place == 0) |
| | 116 | ++optind; |
| | 117 | } else { |
| | 118 | /* Option-argument is either the rest of this argument or the |
| | 119 | entire next argument. */ |
| | 120 | if (*place) |
| | 121 | optarg = place; |
| | 122 | else if (nargc > ++optind) |
| | 123 | optarg = nargv[optind]; |
| | 124 | else { |
| | 125 | /* option-argument absent */ |
| | 126 | place = EMSG; |
| | 127 | if (*ostr == ':') |
| | 128 | return (BADARG); |
| | 129 | if (opterr) |
| | 130 | (void)fprintf(stderr, |
| | 131 | "%s: option requires an argument -- %c\n", |
| | 132 | _getprogname(), optopt); |
| | 133 | return (BADCH); |
| | 134 | } |
| | 135 | place = EMSG; |
| | 136 | ++optind; |
| | 137 | } |
| | 138 | return (optopt); /* return option letter */ |
| | 139 | } |
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