| 1 | This file is set.def, from which is created set.c.
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| 2 | It implements the "set" and "unset" builtins in Bash.
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| 3 |
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| 4 | Copyright (C) 1987-2004 Free Software Foundation, Inc.
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| 5 |
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| 6 | This file is part of GNU Bash, the Bourne Again SHell.
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| 7 |
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| 8 | Bash is free software; you can redistribute it and/or modify it under
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| 9 | the terms of the GNU General Public License as published by the Free
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| 10 | Software Foundation; either version 2, or (at your option) any later
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| 11 | version.
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| 12 |
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| 13 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY
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| 14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 16 | for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License along
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| 19 | with Bash; see the file COPYING. If not, write to the Free Software
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| 20 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
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| 21 |
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| 22 | $PRODUCES set.c
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| 23 |
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| 24 | #include <config.h>
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| 25 |
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| 26 | #if defined (HAVE_UNISTD_H)
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| 27 | # ifdef _MINIX
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| 28 | # include <sys/types.h>
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| 29 | # endif
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| 30 | # include <unistd.h>
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| 31 | #endif
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| 32 |
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| 33 | #include <stdio.h>
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| 34 |
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| 35 | #include "../bashansi.h"
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| 36 | #include "../bashintl.h"
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| 37 |
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| 38 | #include "../shell.h"
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| 39 | #include "../flags.h"
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| 40 | #include "common.h"
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| 41 | #include "bashgetopt.h"
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| 42 |
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| 43 | #if defined (READLINE)
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| 44 | # include "../input.h"
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| 45 | # include "../bashline.h"
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| 46 | # include <readline/readline.h>
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| 47 | #endif
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| 48 |
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| 49 | #if defined (HISTORY)
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| 50 | # include "../bashhist.h"
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| 51 | #endif
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| 52 |
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| 53 | extern int posixly_correct, ignoreeof, eof_encountered_limit;
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| 54 | #if defined (HISTORY)
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| 55 | extern int dont_save_function_defs;
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| 56 | #endif
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| 57 | #if defined (READLINE)
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| 58 | extern int no_line_editing;
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| 59 | #endif /* READLINE */
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| 60 |
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| 61 | $BUILTIN set
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| 62 | $FUNCTION set_builtin
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| 63 | $SHORT_DOC set [--abefhkmnptuvxBCHP] [-o option] [arg ...]
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| 64 | -a Mark variables which are modified or created for export.
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| 65 | -b Notify of job termination immediately.
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| 66 | -e Exit immediately if a command exits with a non-zero status.
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| 67 | -f Disable file name generation (globbing).
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| 68 | -h Remember the location of commands as they are looked up.
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| 69 | -k All assignment arguments are placed in the environment for a
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| 70 | command, not just those that precede the command name.
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| 71 | -m Job control is enabled.
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| 72 | -n Read commands but do not execute them.
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| 73 | -o option-name
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| 74 | Set the variable corresponding to option-name:
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| 75 | allexport same as -a
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| 76 | braceexpand same as -B
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| 77 | #if defined (READLINE)
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| 78 | emacs use an emacs-style line editing interface
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| 79 | #endif /* READLINE */
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| 80 | errexit same as -e
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| 81 | errtrace same as -E
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| 82 | functrace same as -T
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| 83 | hashall same as -h
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| 84 | #if defined (BANG_HISTORY)
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| 85 | histexpand same as -H
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| 86 | #endif /* BANG_HISTORY */
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| 87 | #if defined (HISTORY)
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| 88 | history enable command history
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| 89 | #endif
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| 90 | ignoreeof the shell will not exit upon reading EOF
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| 91 | interactive-comments
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| 92 | allow comments to appear in interactive commands
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| 93 | keyword same as -k
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| 94 | monitor same as -m
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| 95 | noclobber same as -C
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| 96 | noexec same as -n
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| 97 | noglob same as -f
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| 98 | nolog currently accepted but ignored
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| 99 | notify same as -b
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| 100 | nounset same as -u
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| 101 | onecmd same as -t
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| 102 | physical same as -P
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| 103 | pipefail the return value of a pipeline is the status of
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| 104 | the last command to exit with a non-zero status,
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| 105 | or zero if no command exited with a non-zero status
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| 106 | posix change the behavior of bash where the default
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| 107 | operation differs from the 1003.2 standard to
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| 108 | match the standard
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| 109 | privileged same as -p
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| 110 | verbose same as -v
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| 111 | #if defined (READLINE)
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| 112 | vi use a vi-style line editing interface
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| 113 | #endif /* READLINE */
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| 114 | xtrace same as -x
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| 115 | -p Turned on whenever the real and effective user ids do not match.
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| 116 | Disables processing of the $ENV file and importing of shell
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| 117 | functions. Turning this option off causes the effective uid and
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| 118 | gid to be set to the real uid and gid.
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| 119 | -t Exit after reading and executing one command.
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| 120 | -u Treat unset variables as an error when substituting.
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| 121 | -v Print shell input lines as they are read.
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| 122 | -x Print commands and their arguments as they are executed.
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| 123 | #if defined (BRACE_EXPANSION)
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| 124 | -B the shell will perform brace expansion
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| 125 | #endif /* BRACE_EXPANSION */
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| 126 | -C If set, disallow existing regular files to be overwritten
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| 127 | by redirection of output.
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| 128 | -E If set, the ERR trap is inherited by shell functions.
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| 129 | #if defined (BANG_HISTORY)
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| 130 | -H Enable ! style history substitution. This flag is on
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| 131 | by default when the shell is interactive.
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| 132 | #endif /* BANG_HISTORY */
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| 133 | -P If set, do not follow symbolic links when executing commands
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| 134 | such as cd which change the current directory.
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| 135 | -T If set, the DEBUG trap is inherited by shell functions.
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| 136 | - Assign any remaining arguments to the positional parameters.
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| 137 | The -x and -v options are turned off.
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| 138 |
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| 139 | Using + rather than - causes these flags to be turned off. The
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| 140 | flags can also be used upon invocation of the shell. The current
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| 141 | set of flags may be found in $-. The remaining n ARGs are positional
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| 142 | parameters and are assigned, in order, to $1, $2, .. $n. If no
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| 143 | ARGs are given, all shell variables are printed.
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| 144 | $END
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| 145 |
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| 146 | typedef int setopt_set_func_t __P((int, char *));
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| 147 | typedef int setopt_get_func_t __P((char *));
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| 148 |
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| 149 | static void print_minus_o_option __P((char *, int, int));
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| 150 | static void print_all_shell_variables __P((void));
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| 151 |
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| 152 | static int set_ignoreeof __P((int, char *));
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| 153 | static int set_posix_mode __P((int, char *));
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| 154 |
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| 155 | #if defined (READLINE)
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| 156 | static int set_edit_mode __P((int, char *));
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| 157 | static int get_edit_mode __P((char *));
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| 158 | #endif
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| 159 |
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| 160 | #if defined (HISTORY)
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| 161 | static int bash_set_history __P((int, char *));
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| 162 | #endif
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| 163 |
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| 164 | static char *on = "on";
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| 165 | static char *off = "off";
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| 166 |
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| 167 | /* A struct used to match long options for set -o to the corresponding
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| 168 | option letter or internal variable. The functions can be called to
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| 169 | dynamically generate values. */
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| 170 | struct {
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| 171 | char *name;
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| 172 | int letter;
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| 173 | int *variable;
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| 174 | setopt_set_func_t *set_func;
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| 175 | setopt_get_func_t *get_func;
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| 176 | } o_options[] = {
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| 177 | { "allexport", 'a', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 178 | #if defined (BRACE_EXPANSION)
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| 179 | { "braceexpand",'B', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 180 | #endif
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| 181 | #if defined (READLINE)
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| 182 | { "emacs", '\0', (int *)NULL, set_edit_mode, get_edit_mode },
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| 183 | #endif
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| 184 | { "errexit", 'e', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 185 | { "errtrace", 'E', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 186 | { "functrace", 'T', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 187 | { "hashall", 'h', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 188 | #if defined (BANG_HISTORY)
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| 189 | { "histexpand", 'H', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 190 | #endif /* BANG_HISTORY */
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| 191 | #if defined (HISTORY)
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| 192 | { "history", '\0', &remember_on_history, bash_set_history, (setopt_get_func_t *)NULL },
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| 193 | #endif
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| 194 | { "ignoreeof", '\0', &ignoreeof, set_ignoreeof, (setopt_get_func_t *)NULL },
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| 195 | { "interactive-comments", '\0', &interactive_comments, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 196 | { "keyword", 'k', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 197 | { "monitor", 'm', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 198 | { "noclobber", 'C', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 199 | { "noexec", 'n', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 200 | { "noglob", 'f', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
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| 201 | #if defined (HISTORY)
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