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1 | /* shell.h -- The data structures used by the shell */ | |
2 | ||
3 | /* Copyright (C) 1993-2009 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 | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
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 | ||
44 | extern 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 | #define EX_MISCERROR 2 | |
59 | ||
60 | /* Special exit statuses used by the shell, internally and externally. */ | |
61 | #define EX_RETRYFAIL 124 | |
62 | #define EX_WEXPCOMSUB 125 | |
63 | #define EX_BINARY_FILE 126 | |
64 | #define EX_NOEXEC 126 | |
65 | #define EX_NOINPUT 126 | |
66 | #define EX_NOTFOUND 127 | |
67 | ||
68 | #define EX_SHERRBASE 256 /* all special error values are > this. */ | |
69 | ||
70 | #define EX_BADSYNTAX 257 /* shell syntax error */ | |
71 | #define EX_USAGE 258 /* syntax error in usage */ | |
72 | #define EX_REDIRFAIL 259 /* redirection failed */ | |
73 | #define EX_BADASSIGN 260 /* variable assignment error */ | |
74 | #define EX_EXPFAIL 261 /* word expansion failed */ | |
75 | ||
76 | /* Flag values that control parameter pattern substitution. */ | |
77 | #define MATCH_ANY 0x000 | |
78 | #define MATCH_BEG 0x001 | |
79 | #define MATCH_END 0x002 | |
80 | ||
81 | #define MATCH_TYPEMASK 0x003 | |
82 | ||
83 | #define MATCH_GLOBREP 0x010 | |
84 | #define MATCH_QUOTED 0x020 | |
85 | #define MATCH_STARSUB 0x040 | |
86 | ||
87 | /* Some needed external declarations. */ | |
88 | extern char **shell_environment; | |
89 | extern WORD_LIST *rest_of_args; | |
90 | ||
91 | /* Generalized global variables. */ | |
92 | extern int debugging_mode; | |
93 | extern int executing, login_shell; | |
94 | extern int interactive, interactive_shell; | |
95 | extern int startup_state; | |
96 | extern int subshell_environment; | |
97 | extern int shell_compatibility_level; | |
98 | ||
99 | extern int locale_mb_cur_max; | |
100 | ||
101 | /* Structure to pass around that holds a bitmap of file descriptors | |
102 | to close, and the size of that structure. Used in execute_cmd.c. */ | |
103 | struct fd_bitmap { | |
104 | int size; | |
105 | char *bitmap; | |
106 | }; | |
107 | ||
108 | #define FD_BITMAP_SIZE 32 | |
109 | ||
110 | #define CTLESC '\001' | |
111 | #define CTLNUL '\177' | |
112 | ||
113 | /* Information about the current user. */ | |
114 | struct user_info { | |
115 | uid_t uid, euid; | |
116 | gid_t gid, egid; | |
117 | char *user_name; | |
118 | char *shell; /* shell from the password file */ | |
119 | char *home_dir; | |
120 | }; | |
121 | ||
122 | extern struct user_info current_user; | |
123 | ||
124 | /* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle | |
125 | this badly. */ | |
126 | #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8) | |
127 | # define USE_VAR(x) ((void) &(x)) | |
128 | #else | |
129 | # define USE_VAR(x) | |
130 | #endif | |
131 | ||
132 | /* Structure in which to save partial parsing state when doing things like | |
133 | PROMPT_COMMAND and bash_execute_unix_command execution. */ | |
134 | ||
135 | typedef struct _sh_parser_state_t { | |
136 | ||
137 | /* parsing state */ | |
138 | int parser_state; | |
139 | int *token_state; | |
140 | ||
141 | char *token; | |
142 | int token_buffer_size; | |
143 | ||
144 | /* input line state -- line number saved elsewhere */ | |
145 | int input_line_terminator; | |
146 | int eof_encountered; | |
147 | ||
148 | #if defined (HANDLE_MULTIBYTE) | |
149 | /* Nothing right now for multibyte state, but might want something later. */ | |
150 | #endif | |
151 | ||
152 | char **prompt_string_pointer; | |
153 | ||
154 | /* history state affecting or modified by the parser */ | |
155 | int current_command_line_count; | |
156 | #if defined (HISTORY) | |
157 | int remember_on_history; | |
158 | int history_expansion_inhibited; | |
159 | #endif | |
160 | ||
161 | /* execution state possibly modified by the parser */ | |
162 | int last_command_exit_value; | |
163 | #if defined (ARRAY_VARS) | |
164 | ARRAY *pipestatus; | |
165 | #endif | |
166 | sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; | |
167 | ||
168 | /* flags state affecting the parser */ | |
169 | int expand_aliases; | |
170 | int echo_input_at_read; | |
171 | int need_here_doc; | |
172 | ||
173 | } sh_parser_state_t; | |
174 | ||
175 | typedef struct _sh_input_line_state_t { | |
176 | char *input_line; | |
177 | size_t input_line_index; | |
178 | size_t input_line_size; | |
179 | size_t input_line_len; | |
180 | } sh_input_line_state_t; | |
181 | ||
182 | /* Let's try declaring these here. */ | |
183 | extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *)); | |
184 | extern void restore_parser_state __P((sh_parser_state_t *)); | |
185 | ||
186 | extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *)); | |
187 | extern void restore_input_line_state __P((sh_input_line_state_t *)); |