184 lines
4.8 KiB
C
184 lines
4.8 KiB
C
/* shell.h -- The data structures used by the shell */
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/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "bashjmp.h"
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#include "command.h"
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#include "syntax.h"
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#include "general.h"
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#include "error.h"
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#include "variables.h"
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#include "arrayfunc.h"
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#include "quit.h"
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#include "maxpath.h"
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#include "unwind_prot.h"
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#include "dispose_cmd.h"
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#include "make_cmd.h"
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#include "ocache.h"
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#include "subst.h"
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#include "sig.h"
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#include "pathnames.h"
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#include "externs.h"
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extern int EOF_Reached;
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#define NO_PIPE -1
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#define REDIRECT_BOTH -2
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#define NO_VARIABLE -1
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/* Values that can be returned by execute_command (). */
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#define EXECUTION_FAILURE 1
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#define EXECUTION_SUCCESS 0
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/* Usage messages by builtins result in a return status of 2. */
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#define EX_BADUSAGE 2
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#define EX_MISCERROR 2
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/* Special exit statuses used by the shell, internally and externally. */
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#define EX_RETRYFAIL 124
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#define EX_WEXPCOMSUB 125
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#define EX_BINARY_FILE 126
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#define EX_NOEXEC 126
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#define EX_NOINPUT 126
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#define EX_NOTFOUND 127
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#define EX_SHERRBASE 256 /* all special error values are > this. */
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#define EX_BADSYNTAX 257 /* shell syntax error */
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#define EX_USAGE 258 /* syntax error in usage */
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#define EX_REDIRFAIL 259 /* redirection failed */
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#define EX_BADASSIGN 260 /* variable assignment error */
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#define EX_EXPFAIL 261 /* word expansion failed */
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/* Flag values that control parameter pattern substitution. */
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#define MATCH_ANY 0x000
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#define MATCH_BEG 0x001
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#define MATCH_END 0x002
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#define MATCH_TYPEMASK 0x003
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#define MATCH_GLOBREP 0x010
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#define MATCH_QUOTED 0x020
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#define MATCH_STARSUB 0x040
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/* Some needed external declarations. */
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extern char **shell_environment;
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extern WORD_LIST *rest_of_args;
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/* Generalized global variables. */
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extern int debugging_mode;
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extern int executing, login_shell;
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extern int interactive, interactive_shell;
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extern int startup_state;
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extern int subshell_environment;
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extern int shell_compatibility_level;
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/* Structure to pass around that holds a bitmap of file descriptors
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to close, and the size of that structure. Used in execute_cmd.c. */
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struct fd_bitmap {
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int size;
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char *bitmap;
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};
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#define FD_BITMAP_SIZE 32
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#define CTLESC '\001'
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#define CTLNUL '\177'
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/* Information about the current user. */
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struct user_info {
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uid_t uid, euid;
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gid_t gid, egid;
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char *user_name;
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char *shell; /* shell from the password file */
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char *home_dir;
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};
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extern struct user_info current_user;
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/* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle
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this badly. */
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#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8)
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# define USE_VAR(x) ((void) &(x))
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#else
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# define USE_VAR(x)
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#endif
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/* Structure in which to save partial parsing state when doing things like
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PROMPT_COMMAND and bash_execute_unix_command execution. */
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typedef struct _sh_parser_state_t {
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/* parsing state */
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int parser_state;
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int *token_state;
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char *token;
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int token_buffer_size;
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/* input line state -- line number saved elsewhere */
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int input_line_terminator;
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int eof_encountered;
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#if defined (HANDLE_MULTIBYTE)
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/* Nothing right now for multibyte state, but might want something later. */
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#endif
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char **prompt_string_pointer;
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/* history state affecting or modified by the parser */
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int current_command_line_count;
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#if defined (HISTORY)
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int remember_on_history;
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int history_expansion_inhibited;
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#endif
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/* execution state possibly modified by the parser */
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int last_command_exit_value;
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#if defined (ARRAY_VARS)
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ARRAY *pipestatus;
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#endif
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sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
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/* flags state affecting the parser */
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int expand_aliases;
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int echo_input_at_read;
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} sh_parser_state_t;
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typedef struct _sh_input_line_state_t {
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char *input_line;
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int input_line_index;
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int input_line_size;
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int input_line_len;
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} sh_input_line_state_t;
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/* Let's try declaring these here. */
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extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
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extern void restore_parser_state __P((sh_parser_state_t *));
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extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *));
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extern void restore_input_line_state __P((sh_input_line_state_t *));
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