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Diffstat (limited to '')
| -rw-r--r-- | shell.h | 229 |
1 files changed, 229 insertions, 0 deletions
@@ -0,0 +1,229 @@ +/* shell.h -- The data structures used by the shell */ + +/* Copyright (C) 1993-2020 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 + +/* 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; + int token_buffer_size; + + /* input line state -- line number saved elsewhere */ + int input_line_terminator; + int eof_encountered; + +#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; + + /* structures affecting the parser */ + 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 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 *)); |