| 1 | /* $NetBSD: options.c,v 1.38 2005/03/20 21:38:17 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | */
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| 34 |
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| 35 | #include <sys/cdefs.h>
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| 36 | #ifndef lint
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| 37 | #if 0
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| 38 | static char sccsid[] = "@(#)options.c 8.2 (Berkeley) 5/4/95";
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| 39 | #else
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| 40 | __RCSID("$NetBSD: options.c,v 1.38 2005/03/20 21:38:17 dsl Exp $");
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| 41 | #endif
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| 42 | #endif /* not lint */
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| 43 |
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| 44 | #include <signal.h>
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| 45 | #include <unistd.h>
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| 46 | #include <stdlib.h>
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| 47 |
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| 48 | #include "shell.h"
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| 49 | #define DEFINE_OPTIONS
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| 50 | #include "options.h"
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| 51 | #undef DEFINE_OPTIONS
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| 52 | #include "nodes.h" /* for other header files */
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| 53 | #include "eval.h"
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| 54 | #include "jobs.h"
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| 55 | #include "input.h"
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| 56 | #include "output.h"
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| 57 | #include "trap.h"
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| 58 | #include "var.h"
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| 59 | #include "memalloc.h"
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| 60 | #include "error.h"
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| 61 | #include "mystring.h"
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| 62 | #ifndef SMALL
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| 63 | #include "myhistedit.h"
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| 64 | #endif
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| 65 | #include "show.h"
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| 66 |
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| 67 | char *arg0; /* value of $0 */
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| 68 | struct shparam shellparam; /* current positional parameters */
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| 69 | char **argptr; /* argument list for builtin commands */
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| 70 | char *optionarg; /* set by nextopt (like getopt) */
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| 71 | char *optptr; /* used by nextopt */
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| 72 |
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| 73 | char *minusc; /* argument to -c option */
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| 74 |
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| 75 |
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| 76 | STATIC void options(int);
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| 77 | STATIC void minus_o(char *, int);
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| 78 | STATIC void setoption(int, int);
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| 79 | STATIC int getopts(char *, char *, char **, char ***, char **);
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| 80 |
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| 81 |
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| 82 | /*
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| 83 | * Process the shell command line arguments.
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| 84 | */
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| 85 |
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| 86 | void
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| 87 | procargs(int argc, char **argv)
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| 88 | {
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| 89 | int i;
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| 90 |
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| 91 | argptr = argv;
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| 92 | if (argc > 0)
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| 93 | argptr++;
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| 94 | for (i = 0; i < NOPTS; i++)
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| 95 | optlist[i].val = 2;
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| 96 | options(1);
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| 97 | if (*argptr == NULL && minusc == NULL)
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| 98 | sflag = 1;
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| 99 | if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
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| 100 | iflag = 1;
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| 101 | if (mflag == 2)
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| 102 | mflag = iflag;
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| 103 | for (i = 0; i < NOPTS; i++)
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| 104 | if (optlist[i].val == 2)
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| 105 | optlist[i].val = 0;
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| 106 | #if DEBUG == 2
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| 107 | debug = 1;
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| 108 | #endif
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| 109 | arg0 = argv[0];
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| 110 | if (sflag == 0 && minusc == NULL) {
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| 111 | commandname = argv[0];
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| 112 | arg0 = *argptr++;
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| 113 | setinputfile(arg0, 0);
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| 114 | commandname = arg0;
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| 115 | }
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| 116 | /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
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| 117 | if (minusc != NULL) {
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| 118 | if (argptr == NULL || *argptr == NULL)
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| 119 | error("Bad -c option");
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| 120 | minusc = *argptr++;
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| 121 | if (*argptr != 0)
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| 122 | arg0 = *argptr++;
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| 123 | }
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| 124 |
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| 125 | shellparam.p = argptr;
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| 126 | shellparam.reset = 1;
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| 127 | /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
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| 128 | while (*argptr) {
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| 129 | shellparam.nparam++;
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| 130 | argptr++;
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| 131 | }
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| 132 | optschanged();
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| 133 | }
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| 134 |
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| 135 |
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| 136 | void
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| 137 | optschanged(void)
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| 138 | {
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| 139 | setinteractive(iflag);
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| 140 | #ifndef SMALL
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| 141 | histedit();
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| 142 | #endif
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| 143 | setjobctl(mflag);
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| 144 | }
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| 145 |
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| 146 | /*
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| 147 | * Process shell options. The global variable argptr contains a pointer
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| 148 | * to the argument list; we advance it past the options.
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| 149 | */
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| 150 |
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| 151 | STATIC void
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| 152 | options(int cmdline)
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| 153 | {
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| 154 | static char empty[] = "";
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| 155 | char *p;
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| 156 | int val;
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| 157 | int c;
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| 158 |
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| 159 | if (cmdline)
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| 160 | minusc = NULL;
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| 161 | while ((p = *argptr) != NULL) {
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| 162 | argptr++;
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| 163 | if ((c = *p++) == '-') {
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| 164 | val = 1;
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| 165 | if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
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| 166 | if (!cmdline) {
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| 167 | /* "-" means turn off -x and -v */
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| 168 | if (p[0] == '\0')
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| 169 | xflag = vflag = 0;
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| 170 | /* "--" means reset params */
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| 171 | else if (*argptr == NULL)
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| 172 | setparam(argptr);
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| 173 | }
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| 174 | break; /* "-" or "--" terminates options */
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| 175 | }
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| 176 | } else if (c == '+') {
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| 177 | val = 0;
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| 178 | } else {
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| 179 | argptr--;
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| 180 | break;
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| 181 | }
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| 182 | while ((c = *p++) != '\0') {
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| 183 | if (c == 'c' && cmdline) {
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| 184 | /* command is after shell args*/
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| 185 | minusc = empty;
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| 186 | } else if (c == 'o') {
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| 187 | minus_o(*argptr, val);
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| 188 | if (*argptr)
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| 189 | argptr++;
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| 190 | } else {
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| 191 | setoption(c, val);
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| 192 | }
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| 193 | }
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| 194 | }
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| 195 | }
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| 196 |
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| 197 | static void
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| 198 | set_opt_val(int i, int val)
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| 199 | {
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| 200 | int j;
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| 201 | int flag;
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| 202 |
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| 203 | if (val && (flag = optlist[i].opt_set)) {
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| 204 | /* some options (eg vi/emacs) are mutually exclusive */
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| 205 | for (j = 0; j < NOPTS; j++)
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| 206 | if (optlist[j].opt_set == flag)
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| 207 | optlist[j].val = 0;
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| 208 | }
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| 209 | optlist[i].val = val;
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| 210 | #ifdef DEBUG
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| 211 | if (&optlist[i].val == &debug)
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| 212 | opentrace();
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| 213 | #endif
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| 214 | }
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| 215 |
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| 216 | STATIC void
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| 217 | minus_o(char *name, int val)
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| 218 | {
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| 219 | int i;
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| 220 |
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| 221 | if (name == NULL) {
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| 222 | out1str("Current option settings\n");
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| 223 | for (i = 0; i < NOPTS; i++)
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| 224 | out1fmt("%-16s%s\n", optlist[i].name,
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| 225 | optlist[i].val ? "on" : "off");
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| 226 | } else {
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| 227 | for (i = 0; i < NOPTS; i++)
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| 228 | if (equal(name, optlist[i].name)) {
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| 229 | set_opt_val(i, val);
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| 230 | return;
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| 231 | }
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| 232 | error("Illegal option -o %s", name);
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| 233 | }
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| 234 | }
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| 235 |
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| 236 |
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| 237 | STATIC void
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| 238 | setoption(int flag, int val)
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| 239 | {
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| 240 | int i;
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| 241 |
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| 242 | for (i = 0; i < NOPTS; i++)
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| 243 | if (optlist[i].letter == flag) {
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| 244 | set_opt_val( i, val );
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| 245 | return;
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| 246 | }
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| 247 | error("Illegal option -%c", flag);
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| 248 | /* NOTREACHED */
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| 249 | }
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| 250 |
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| 251 |
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| 252 |
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| 253 | #ifdef mkinit
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| 254 | INCLUDE "options.h"
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| 255 |
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| 256 | SHELLPROC {
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| 257 | int i;
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| 258 |
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| 259 | for (i = 0; optlist[i].name; i++)
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| 260 | optlist[i].val = 0;
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| 261 | optschanged();
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| 262 |
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| 263 | }
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| 264 | #endif
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| 265 |
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| 266 |
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| 267 | /*
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| 268 | * Set the shell parameters.
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| 269 | */
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| 270 |
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| 271 | void
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| 272 | setparam(char **argv)
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| 273 | {
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| 274 | char **newparam;
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| 275 | char **ap;
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| 276 | int nparam;
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| 277 |
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| 278 | for (nparam = 0 ; argv[nparam] ; nparam++)
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| 279 | continue;
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| 280 | ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
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| 281 | while (*argv) {
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| 282 | *ap++ = savestr(*argv++);
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| 283 | }
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| 284 | *ap = NULL;
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| 285 | freeparam(&shellparam);
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| 286 | shellparam.malloc = 1;
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| 287 | shellparam.nparam = nparam;
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| 288 | shellparam.p = newparam;
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| 289 | shellparam.optnext = NULL;
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| 290 | }
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| 291 |
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| 292 |
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| 293 | /*
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| 294 | * Free the list of positional parameters.
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| 295 | */
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| 296 |
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| 297 | void
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| 298 | freeparam(volatile struct shparam *param)
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| 299 | {
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| 300 | char **ap;
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| 301 |
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| 302 | if (param->malloc) {
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| 303 | for (ap = param->p ; *ap ; ap++)
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| 304 | ckfree(*ap);
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| 305 | ckfree(param->p);
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| 306 | }
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| 307 | }
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| 308 |
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| 309 |
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| 310 |
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| 311 | /*
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| 312 | * The shift builtin command.
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| 313 | */
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| 314 |
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| 315 | int
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| 316 | shiftcmd(int argc, char **argv)
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| 317 | {
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| 318 | int n;
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| 319 | char **ap1, **ap2;
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| 320 |
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| 321 | n = 1;
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| 322 | if (argc > 1)
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| 323 | n = number(argv[1]);
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| 324 | if (n > shellparam.nparam)
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| 325 | error("can't shift that many");
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| 326 | INTOFF;
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| 327 | shellparam.nparam -= n;
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| 328 | for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
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| 329 | if (shellparam.malloc)
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| 330 | ckfree(*ap1);
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| 331 | }
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| 332 | ap2 = shellparam.p;
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| 333 | while ((*ap2++ = *ap1++) != NULL);
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| 334 | shellparam.optnext = NULL;
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| 335 | INTON;
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| 336 | return 0;
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| 337 | }
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| 338 |
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| 339 |
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| 340 |
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| 341 | /*
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| 342 | * The set command builtin.
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| 343 | */
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| 344 |
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| 345 | int
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| 346 | setcmd(int argc, char **argv)
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| 347 | {
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| 348 | if (argc == 1)
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| 349 | return showvars(0, 0, 1);
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| 350 | INTOFF;
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| 351 | options(0);
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| 352 | optschanged();
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| 353 | if (*argptr != NULL) {
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| 354 | setparam(argptr);
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| 355 | }
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| 356 | INTON;
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| 357 | return 0;
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| 358 | }
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| 359 |
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| 360 |
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| 361 | void
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| 362 | getoptsreset(value)
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| 363 | const char *value;
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| 364 | {
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| 365 | if (number(value) == 1) {
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| 366 | shellparam.optnext = NULL;
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| 367 | shellparam.reset = 1;
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| 368 | }
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| 369 | }
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| 370 |
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| 371 | /*
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| 372 | * The getopts builtin. Shellparam.optnext points to the next argument
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| 373 | * to be processed. Shellparam.optptr points to the next character to
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| 374 | * be processed in the current argument. If shellparam.optnext is NULL,
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| 375 | * then it's the first time getopts has been called.
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| 376 | */
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| 377 |
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| 378 | int
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| 379 | getoptscmd(int argc, char **argv)
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| 380 | {
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| 381 | char **optbase;
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| 382 |
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| 383 | if (argc < 3)
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| 384 | error("usage: getopts optstring var [arg]");
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| 385 | else if (argc == 3)
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| 386 | optbase = shellparam.p;
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| 387 | else
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| 388 | optbase = &argv[3];
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| 389 |
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| 390 | if (shellparam.reset == 1) {
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| 391 | shellparam.optnext = optbase;
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| 392 | shellparam.optptr = NULL;
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| 393 | shellparam.reset = 0;
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| 394 | }
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| 395 |
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| 396 | return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
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| 397 | &shellparam.optptr);
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| 398 | }
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| 399 |
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| 400 | STATIC int
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| 401 | getopts(char *optstr, char *optvar, char **optfirst, char ***optnext, char **optpptr)
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| 402 | {
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| 403 | char *p, *q;
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| 404 | char c = '?';
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| 405 | int done = 0;
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| 406 | int ind = 0;
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| 407 | int err = 0;
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| 408 | char s[12];
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| 409 |
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| 410 | if ((p = *optpptr) == NULL || *p == '\0') {
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| 411 | /* Current word is done, advance */
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| 412 | if (*optnext == NULL)
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| 413 | return 1;
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| 414 | p = **optnext;
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| 415 | if (p == NULL || *p != '-' || *++p == '\0') {
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| 416 | atend:
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| 417 | ind = *optnext - optfirst + 1;
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| 418 | *optnext = NULL;
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| 419 | p = NULL;
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| 420 | done = 1;
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| 421 | goto out;
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| 422 | }
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| 423 | (*optnext)++;
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| 424 | if (p[0] == '-' && p[1] == '\0') /* check for "--" */
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| 425 | goto atend;
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| 426 | }
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| 427 |
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| 428 | c = *p++;
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| 429 | for (q = optstr; *q != c; ) {
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| 430 | if (*q == '\0') {
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| 431 | if (optstr[0] == ':') {
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| 432 | s[0] = c;
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| 433 | s[1] = '\0';
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| 434 | err |= setvarsafe("OPTARG", s, 0);
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| 435 | } else {
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| 436 | outfmt(&errout, "Illegal option -%c\n", c);
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| 437 | (void) unsetvar("OPTARG", 0);
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| 438 | }
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| 439 | c = '?';
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| 440 | goto bad;
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| 441 | }
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| 442 | if (*++q == ':')
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| 443 | q++;
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| 444 | }
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| 445 |
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| 446 | if (*++q == ':') {
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| 447 | if (*p == '\0' && (p = **optnext) == NULL) {
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| 448 | if (optstr[0] == ':') {
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| 449 | s[0] = c;
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| 450 | s[1] = '\0';
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|---|
| 451 | err |= setvarsafe("OPTARG", s, 0);
|
|---|
| 452 | c = ':';
|
|---|
| 453 | } else {
|
|---|
| 454 | outfmt(&errout, "No arg for -%c option\n", c);
|
|---|
| 455 | (void) unsetvar("OPTARG", 0);
|
|---|
| 456 | c = '?';
|
|---|
| 457 | }
|
|---|
| 458 | goto bad;
|
|---|
| 459 | }
|
|---|
| 460 |
|
|---|
| 461 | if (p == **optnext)
|
|---|
| 462 | (*optnext)++;
|
|---|
| 463 | err |= setvarsafe("OPTARG", p, 0);
|
|---|
| 464 | p = NULL;
|
|---|
| 465 | } else
|
|---|
| 466 | err |= setvarsafe("OPTARG", "", 0);
|
|---|
| 467 | ind = *optnext - optfirst + 1;
|
|---|
| 468 | goto out;
|
|---|
| 469 |
|
|---|
| 470 | bad:
|
|---|
| 471 | ind = 1;
|
|---|
| 472 | *optnext = NULL;
|
|---|
| 473 | p = NULL;
|
|---|
| 474 | out:
|
|---|
| 475 | *optpptr = p;
|
|---|
| 476 | fmtstr(s, sizeof(s), "%d", ind);
|
|---|
| 477 | err |= setvarsafe("OPTIND", s, VNOFUNC);
|
|---|
| 478 | s[0] = c;
|
|---|
| 479 | s[1] = '\0';
|
|---|
| 480 | err |= setvarsafe(optvar, s, 0);
|
|---|
| 481 | if (err) {
|
|---|
| 482 | *optnext = NULL;
|
|---|
| 483 | *optpptr = NULL;
|
|---|
| 484 | output_flushall();
|
|---|
| 485 | exraise(EXERROR);
|
|---|
| 486 | }
|
|---|
| 487 | return done;
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | /*
|
|---|
| 491 | * XXX - should get rid of. have all builtins use getopt(3). the
|
|---|
| 492 | * library getopt must have the BSD extension static variable "optreset"
|
|---|
| 493 | * otherwise it can't be used within the shell safely.
|
|---|
| 494 | *
|
|---|
| 495 | * Standard option processing (a la getopt) for builtin routines. The
|
|---|
| 496 | * only argument that is passed to nextopt is the option string; the
|
|---|
| 497 | * other arguments are unnecessary. It return the character, or '\0' on
|
|---|
| 498 | * end of input.
|
|---|
| 499 | */
|
|---|
| 500 |
|
|---|
| 501 | int
|
|---|
| 502 | nextopt(const char *optstring)
|
|---|
| 503 | {
|
|---|
| 504 | char *p;
|
|---|
| 505 | const char *q;
|
|---|
| 506 | char c;
|
|---|
| 507 |
|
|---|
| 508 | if ((p = optptr) == NULL || *p == '\0') {
|
|---|
| 509 | p = *argptr;
|
|---|
| 510 | if (p == NULL || *p != '-' || *++p == '\0')
|
|---|
| 511 | return '\0';
|
|---|
| 512 | argptr++;
|
|---|
| 513 | if (p[0] == '-' && p[1] == '\0') /* check for "--" */
|
|---|
| 514 | return '\0';
|
|---|
| 515 | }
|
|---|
| 516 | c = *p++;
|
|---|
| 517 | for (q = optstring ; *q != c ; ) {
|
|---|
| 518 | if (*q == '\0')
|
|---|
| 519 | error("Illegal option -%c", c);
|
|---|
| 520 | if (*++q == ':')
|
|---|
| 521 | q++;
|
|---|
| 522 | }
|
|---|
| 523 | if (*++q == ':') {
|
|---|
| 524 | if (*p == '\0' && (p = *argptr++) == NULL)
|
|---|
| 525 | error("No arg for -%c option", c);
|
|---|
| 526 | optionarg = p;
|
|---|
| 527 | p = NULL;
|
|---|
| 528 | }
|
|---|
| 529 | optptr = p;
|
|---|
| 530 | return c;
|
|---|
| 531 | }
|
|---|
