1/* shell.h -- The data structures used by the shell */ 2 3/* Copyright (C) 1993-2002 Free Software Foundation, Inc. 4 5 This file is part of GNU Bash, the Bourne Again SHell. 6 7 Bash is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2, or (at your option) any later 10 version. 11 12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License along 18 with Bash; see the file COPYING. If not, write to the Free Software 19 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 20 21#ifdef HAVE_CONFIG_H 22#include "config.h" 23#endif 24 25#include "bashjmp.h" 26 27#include "command.h" 28#include "syntax.h" 29#include "general.h" 30#include "error.h" 31#include "variables.h" 32#include "arrayfunc.h" 33#include "quit.h" 34#include "maxpath.h" 35#include "unwind_prot.h" 36#include "dispose_cmd.h" 37#include "make_cmd.h" 38#include "ocache.h" 39#include "subst.h" 40#include "sig.h" 41#include "pathnames.h" 42#include "externs.h" 43 44extern int EOF_Reached; 45 46#define NO_PIPE -1 47#define REDIRECT_BOTH -2 48 49#define NO_VARIABLE -1 50 51/* Values that can be returned by execute_command (). */ 52#define EXECUTION_FAILURE 1 53#define EXECUTION_SUCCESS 0 54 55/* Usage messages by builtins result in a return status of 2. */ 56#define EX_BADUSAGE 2 57 58/* Special exit statuses used by the shell, internally and externally. */ 59#define EX_BINARY_FILE 126 60#define EX_NOEXEC 126 61#define EX_NOINPUT 126 62#define EX_NOTFOUND 127 63 64#define EX_SHERRBASE 256 /* all special error values are > this. */ 65 66#define EX_BADSYNTAX 257 /* shell syntax error */ 67#define EX_USAGE 258 /* syntax error in usage */ 68#define EX_REDIRFAIL 259 /* redirection failed */ 69#define EX_BADASSIGN 260 /* variable assignment error */ 70#define EX_EXPFAIL 261 /* word expansion failed */ 71 72/* Flag values that control parameter pattern substitution. */ 73#define MATCH_ANY 0x000 74#define MATCH_BEG 0x001 75#define MATCH_END 0x002 76 77#define MATCH_TYPEMASK 0x003 78 79#define MATCH_GLOBREP 0x010 80#define MATCH_QUOTED 0x020 81#define MATCH_STARSUB 0x040 82 83/* Some needed external declarations. */ 84extern char **shell_environment; 85extern WORD_LIST *rest_of_args; 86 87/* Generalized global variables. */ 88extern int debugging_mode; 89extern int executing, login_shell; 90extern int interactive, interactive_shell; 91extern int startup_state; 92extern int shell_compatibility_level; 93 94/* Structure to pass around that holds a bitmap of file descriptors 95 to close, and the size of that structure. Used in execute_cmd.c. */ 96struct fd_bitmap { 97 int size; 98 char *bitmap; 99}; 100 101#define FD_BITMAP_SIZE 32 102 103#define CTLESC '\001' 104#define CTLNUL '\177' 105 106/* Information about the current user. */ 107struct user_info { 108 uid_t uid, euid; 109 gid_t gid, egid; 110 char *user_name; 111 char *shell; /* shell from the password file */ 112 char *home_dir; 113}; 114 115extern struct user_info current_user; 116 117/* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle 118 this badly. */ 119#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8) 120# define USE_VAR(x) ((void) &(x)) 121#else 122# define USE_VAR(x) 123#endif 124 125/* Structure in which to save partial parsing state when doing things like 126 PROMPT_COMMAND and bash_execute_unix_command execution. */ 127 128typedef struct _sh_parser_state_t { 129 130 /* parsing state */ 131 int parser_state; 132 int *token_state; 133 134 /* input line state -- line number saved elsewhere */ 135 int input_line_terminator; 136 int eof_encountered; 137 138#if defined (HANDLE_MULTIBYTE) 139 /* Nothing right now for multibyte state, but might want something later. */ 140#endif 141 142 /* history state affecting or modified by the parser */ 143 int current_command_line_count; 144#if defined (HISTORY) 145 int remember_on_history; 146 int history_expansion_inhibited; 147#endif 148 149 /* execution state possibly modified by the parser */ 150 int last_command_exit_value; 151#if defined (ARRAY_VARS) 152 ARRAY *pipestatus; 153#endif 154 sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; 155 156 /* flags state affecting the parser */ 157 int expand_aliases; 158 int echo_input_at_read; 159 160} sh_parser_state_t; 161 162/* Let's try declaring these here. */ 163extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *)); 164extern void restore_parser_state __P((sh_parser_state_t *)); 165