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/* shell.h -- The data structures used by the shell */
/* Copyright (C) 1993-2021 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "bashjmp.h"
#include "command.h"
#include "syntax.h"
#include "general.h"
#include "error.h"
#include "variables.h"
#include "arrayfunc.h"
#include "quit.h"
#include "maxpath.h"
#include "unwind_prot.h"
#include "dispose_cmd.h"
#include "make_cmd.h"
#include "ocache.h"
#include "subst.h"
#include "sig.h"
#include "pathnames.h"
#include "externs.h"
extern int EOF_Reached;
#define NO_PIPE -1
#define REDIRECT_BOTH -2
#define NO_VARIABLE -1
/* Values that can be returned by execute_command (). */
#define EXECUTION_FAILURE 1
#define EXECUTION_SUCCESS 0
/* Usage messages by builtins result in a return status of 2. */
#define EX_BADUSAGE 2
#define EX_MISCERROR 2
/* Special exit statuses used by the shell, internally and externally. */
#define EX_RETRYFAIL 124
#define EX_WEXPCOMSUB 125
#define EX_BINARY_FILE 126
#define EX_NOEXEC 126
#define EX_NOINPUT 126
#define EX_NOTFOUND 127
#define EX_SHERRBASE 256 /* all special error values are > this. */
#define EX_BADSYNTAX 257 /* shell syntax error */
#define EX_USAGE 258 /* syntax error in usage */
#define EX_REDIRFAIL 259 /* redirection failed */
#define EX_BADASSIGN 260 /* variable assignment error */
#define EX_EXPFAIL 261 /* word expansion failed */
#define EX_DISKFALLBACK 262 /* fall back to disk command from builtin */
/* Flag values that control parameter pattern substitution. */
#define MATCH_ANY 0x000
#define MATCH_BEG 0x001
#define MATCH_END 0x002
#define MATCH_TYPEMASK 0x003
#define MATCH_GLOBREP 0x010
#define MATCH_QUOTED 0x020
#define MATCH_ASSIGNRHS 0x040
#define MATCH_STARSUB 0x080
#define MATCH_EXPREP 0x100 /* for pattern substitution, expand replacement */
/* Some needed external declarations. */
extern char **shell_environment;
extern WORD_LIST *rest_of_args;
/* Generalized global variables. */
extern char *command_execution_string;
extern int debugging_mode;
extern int executing, login_shell;
extern int interactive, interactive_shell;
extern int startup_state;
extern int reading_shell_script;
extern int shell_initialized;
extern int bash_argv_initialized;
extern int subshell_environment;
extern int current_command_number;
extern int indirection_level;
extern int shell_compatibility_level;
extern int running_under_emacs;
extern int posixly_correct;
extern int no_line_editing;
extern char *shell_name;
extern char *current_host_name;
extern int subshell_argc;
extern char **subshell_argv;
extern char **subshell_envp;
/* variables managed using shopt */
extern int hup_on_exit;
extern int check_jobs_at_exit;
extern int autocd;
extern int check_window_size;
/* from version.c */
extern int build_version, patch_level;
extern char *dist_version, *release_status;
extern int locale_mb_cur_max;
extern int locale_utf8locale;
/* Structure to pass around that holds a bitmap of file descriptors
to close, and the size of that structure. Used in execute_cmd.c. */
struct fd_bitmap {
int size;
char *bitmap;
};
#define FD_BITMAP_SIZE 32
#define CTLESC '\001'
#define CTLNUL '\177'
/* Information about the current user. */
struct user_info {
uid_t uid, euid;
gid_t gid, egid;
char *user_name;
char *shell; /* shell from the password file */
char *home_dir;
};
extern struct user_info current_user;
/* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle
this badly. */
#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8)
# define USE_VAR(x) ((void) &(x))
#else
# define USE_VAR(x)
#endif
#define HEREDOC_MAX 16
/* Structure in which to save partial parsing state when doing things like
PROMPT_COMMAND and bash_execute_unix_command execution. */
typedef struct _sh_parser_state_t
{
/* parsing state */
int parser_state;
int *token_state;
char *token;
size_t token_buffer_size;
int eof_token;
/* input line state -- line number saved elsewhere */
int input_line_terminator;
int eof_encountered;
int eol_lookahead;
#if defined (HANDLE_MULTIBYTE)
/* Nothing right now for multibyte state, but might want something later. */
#endif
char **prompt_string_pointer;
/* history state affecting or modified by the parser */
int current_command_line_count;
#if defined (HISTORY)
int remember_on_history;
int history_expansion_inhibited;
#endif
/* execution state possibly modified by the parser */
int last_command_exit_value;
#if defined (ARRAY_VARS)
ARRAY *pipestatus;
#endif
sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
/* flags state affecting the parser */
int expand_aliases;
int echo_input_at_read;
int need_here_doc;
int here_doc_first_line;
int esacs_needed;
int expecting_in;
/* structures affecting the parser */
void *pushed_strings;
REDIRECT *redir_stack[HEREDOC_MAX];
} sh_parser_state_t;
typedef struct _sh_input_line_state_t
{
char *input_line;
size_t input_line_index;
size_t input_line_size;
size_t input_line_len;
#if defined (HANDLE_MULTIBYTE)
char *input_property;
size_t input_propsize;
#endif
} sh_input_line_state_t;
/* Let's try declaring these here. */
extern void shell_ungets PARAMS((char *));
extern void rewind_input_string PARAMS((void));
extern char *parser_remaining_input PARAMS((void));
extern sh_parser_state_t *save_parser_state PARAMS((sh_parser_state_t *));
extern void restore_parser_state PARAMS((sh_parser_state_t *));
extern sh_input_line_state_t *save_input_line_state PARAMS((sh_input_line_state_t *));
extern void restore_input_line_state PARAMS((sh_input_line_state_t *));
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