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+/* shell.h -- The data structures used by the shell */
+
+/* Copyright (C) 1993-2009 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;
+} sh_input_line_state_t;
+
+/* Let's try declaring these here. */
+extern char *parser_remaining_input __P((void));
+
+extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
+extern void restore_parser_state __P((sh_parser_state_t *));
+
+extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *));
+extern void restore_input_line_state __P((sh_input_line_state_t *));