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Commit | Line | Data |
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726f6388 JA |
1 | /* variables.c -- Functions for hacking shell variables. */ |
2 | ||
c5402025 | 3 | /* Copyright (C) 1987-2011 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
2e4498b3 CR |
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. | |
726f6388 | 11 | |
2e4498b3 CR |
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. | |
726f6388 JA |
16 | |
17 | You should have received a copy of the GNU General Public License | |
2e4498b3 CR |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
19 | */ | |
726f6388 | 20 | |
ccc6cda3 JA |
21 | #include "config.h" |
22 | ||
726f6388 JA |
23 | #include "bashtypes.h" |
24 | #include "posixstat.h" | |
f73dda09 | 25 | #include "posixtime.h" |
ccc6cda3 | 26 | |
70694d2e CR |
27 | #if defined (__QNX__) |
28 | # if defined (__QNXNTO__) | |
d3ad40de | 29 | # include <sys/netmgr.h> |
fd3925f1 CR |
30 | # else |
31 | # include <sys/vc.h> | |
70694d2e CR |
32 | # endif /* !__QNXNTO__ */ |
33 | #endif /* __QNX__ */ | |
d166f048 | 34 | |
ccc6cda3 JA |
35 | #if defined (HAVE_UNISTD_H) |
36 | # include <unistd.h> | |
37 | #endif | |
38 | ||
39 | #include <stdio.h> | |
f73dda09 | 40 | #include "chartypes.h" |
e77a3058 CR |
41 | #if defined (HAVE_PWD_H) |
42 | # include <pwd.h> | |
43 | #endif | |
726f6388 | 44 | #include "bashansi.h" |
5e13499c | 45 | #include "bashintl.h" |
ccc6cda3 | 46 | |
691aebcb CR |
47 | #define NEED_XTRACE_SET_DECL |
48 | ||
726f6388 | 49 | #include "shell.h" |
726f6388 JA |
50 | #include "flags.h" |
51 | #include "execute_cmd.h" | |
cce855bc | 52 | #include "findcmd.h" |
ccc6cda3 JA |
53 | #include "mailcheck.h" |
54 | #include "input.h" | |
f73dda09 JA |
55 | #include "hashcmd.h" |
56 | #include "pathexp.h" | |
fdf670ea | 57 | #include "alias.h" |
726f6388 | 58 | |
d166f048 | 59 | #include "builtins/getopt.h" |
726f6388 | 60 | #include "builtins/common.h" |
cce855bc JA |
61 | |
62 | #if defined (READLINE) | |
63 | # include "bashline.h" | |
64 | # include <readline/readline.h> | |
65 | #else | |
66 | # include <tilde/tilde.h> | |
67 | #endif | |
726f6388 | 68 | |
ccc6cda3 JA |
69 | #if defined (HISTORY) |
70 | # include "bashhist.h" | |
cce855bc | 71 | # include <readline/history.h> |
ccc6cda3 JA |
72 | #endif /* HISTORY */ |
73 | ||
bb70624e JA |
74 | #if defined (PROGRAMMABLE_COMPLETION) |
75 | # include "pcomplete.h" | |
76 | #endif | |
77 | ||
7117c2d2 JA |
78 | #define TEMPENV_HASH_BUCKETS 4 /* must be power of two */ |
79 | ||
80 | #define ifsname(s) ((s)[0] == 'I' && (s)[1] == 'F' && (s)[2] == 'S' && (s)[3] == '\0') | |
81 | ||
0f445e6c CR |
82 | extern char **environ; |
83 | ||
726f6388 JA |
84 | /* Variables used here and defined in other files. */ |
85 | extern int posixly_correct; | |
048b249e | 86 | extern int line_number, line_number_base; |
d3a24ed2 | 87 | extern int subshell_environment, indirection_level, subshell_level; |
ccc6cda3 | 88 | extern int build_version, patch_level; |
d3a24ed2 | 89 | extern int expanding_redir; |
1f6ec1a8 | 90 | extern int last_command_exit_value; |
ccc6cda3 | 91 | extern char *dist_version, *release_status; |
726f6388 JA |
92 | extern char *shell_name; |
93 | extern char *primary_prompt, *secondary_prompt; | |
ccc6cda3 | 94 | extern char *current_host_name; |
f73dda09 | 95 | extern sh_builtin_func_t *this_shell_builtin; |
bb70624e | 96 | extern SHELL_VAR *this_shell_function; |
d3a24ed2 | 97 | extern char *the_printed_command_except_trap; |
ccc6cda3 | 98 | extern char *this_command_name; |
d3a24ed2 | 99 | extern char *command_execution_string; |
726f6388 | 100 | extern time_t shell_start_time; |
d7f49990 CR |
101 | extern int assigning_in_environment; |
102 | extern int executing_builtin; | |
6faad625 | 103 | extern int funcnest_max; |
726f6388 | 104 | |
d3a24ed2 | 105 | #if defined (READLINE) |
ac58e8c8 | 106 | extern int no_line_editing; |
d3a24ed2 CR |
107 | extern int perform_hostname_completion; |
108 | #endif | |
109 | ||
7117c2d2 JA |
110 | /* The list of shell variables that the user has created at the global |
111 | scope, or that came from the environment. */ | |
112 | VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL; | |
113 | ||
114 | /* The current list of shell variables, including function scopes */ | |
115 | VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL; | |
726f6388 JA |
116 | |
117 | /* The list of shell functions that the user has created, or that came from | |
118 | the environment. */ | |
119 | HASH_TABLE *shell_functions = (HASH_TABLE *)NULL; | |
120 | ||
d3a24ed2 CR |
121 | #if defined (DEBUGGER) |
122 | /* The table of shell function definitions that the user defined or that | |
123 | came from the environment. */ | |
124 | HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL; | |
125 | #endif | |
126 | ||
726f6388 JA |
127 | /* The current variable context. This is really a count of how deep into |
128 | executing functions we are. */ | |
129 | int variable_context = 0; | |
130 | ||
7117c2d2 | 131 | /* The set of shell assignments which are made only in the environment |
726f6388 | 132 | for a single command. */ |
7117c2d2 | 133 | HASH_TABLE *temporary_env = (HASH_TABLE *)NULL; |
726f6388 | 134 | |
56299fa5 CR |
135 | /* Set to non-zero if an assignment error occurs while putting variables |
136 | into the temporary environment. */ | |
137 | int tempenv_assign_error; | |
138 | ||
726f6388 JA |
139 | /* Some funky variables which are known about specially. Here is where |
140 | "$*", "$1", and all the cruft is kept. */ | |
141 | char *dollar_vars[10]; | |
142 | WORD_LIST *rest_of_args = (WORD_LIST *)NULL; | |
143 | ||
144 | /* The value of $$. */ | |
f73dda09 | 145 | pid_t dollar_dollar_pid; |
726f6388 | 146 | |
d7f49990 CR |
147 | /* Non-zero means that we have to remake EXPORT_ENV. */ |
148 | int array_needs_making = 1; | |
149 | ||
150 | /* The number of times BASH has been executed. This is set | |
151 | by initialize_variables (). */ | |
152 | int shell_level = 0; | |
153 | ||
726f6388 | 154 | /* An array which is passed to commands as their environment. It is |
d166f048 | 155 | manufactured from the union of the initial environment and the |
726f6388 JA |
156 | shell variables that are marked for export. */ |
157 | char **export_env = (char **)NULL; | |
d166f048 JA |
158 | static int export_env_index; |
159 | static int export_env_size; | |
726f6388 | 160 | |
ac58e8c8 CR |
161 | #if defined (READLINE) |
162 | static int winsize_assignment; /* currently assigning to LINES or COLUMNS */ | |
ac58e8c8 CR |
163 | #endif |
164 | ||
726f6388 | 165 | /* Some forward declarations. */ |
d3ad40de CR |
166 | static void create_variable_tables __P((void)); |
167 | ||
f73dda09 JA |
168 | static void set_machine_vars __P((void)); |
169 | static void set_home_var __P((void)); | |
170 | static void set_shell_var __P((void)); | |
171 | static char *get_bash_name __P((void)); | |
172 | static void initialize_shell_level __P((void)); | |
173 | static void uidset __P((void)); | |
174 | #if defined (ARRAY_VARS) | |
175 | static void make_vers_array __P((void)); | |
176 | #endif | |
f73dda09 | 177 | |
fdf670ea | 178 | static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 179 | #if defined (ARRAY_VARS) |
fdf670ea | 180 | static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 181 | #endif |
d3a24ed2 CR |
182 | static SHELL_VAR *get_self __P((SHELL_VAR *)); |
183 | ||
184 | #if defined (ARRAY_VARS) | |
185 | static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int)); | |
fdf670ea | 186 | static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int)); |
d3a24ed2 | 187 | #endif |
7117c2d2 | 188 | |
fdf670ea | 189 | static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 JA |
190 | static SHELL_VAR *get_seconds __P((SHELL_VAR *)); |
191 | static SHELL_VAR *init_seconds_var __P((void)); | |
192 | ||
193 | static int brand __P((void)); | |
f73dda09 | 194 | static void sbrand __P((unsigned long)); /* set bash random number generator. */ |
35bb237e | 195 | static void seedrand __P((void)); /* seed generator randomly */ |
fdf670ea | 196 | static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 197 | static SHELL_VAR *get_random __P((SHELL_VAR *)); |
f73dda09 | 198 | |
fdf670ea | 199 | static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 200 | static SHELL_VAR *get_lineno __P((SHELL_VAR *)); |
f73dda09 | 201 | |
fdf670ea | 202 | static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *)); |
d3a24ed2 CR |
203 | static SHELL_VAR *get_subshell __P((SHELL_VAR *)); |
204 | ||
d3ad40de CR |
205 | static SHELL_VAR *get_bashpid __P((SHELL_VAR *)); |
206 | ||
7117c2d2 JA |
207 | #if defined (HISTORY) |
208 | static SHELL_VAR *get_histcmd __P((SHELL_VAR *)); | |
209 | #endif | |
210 | ||
fdf670ea CR |
211 | #if defined (READLINE) |
212 | static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *)); | |
213 | static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
214 | #endif | |
215 | ||
7117c2d2 | 216 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
fdf670ea | 217 | static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 218 | static SHELL_VAR *get_dirstack __P((SHELL_VAR *)); |
7117c2d2 JA |
219 | #endif |
220 | ||
221 | #if defined (ARRAY_VARS) | |
222 | static SHELL_VAR *get_groupset __P((SHELL_VAR *)); | |
fdf670ea CR |
223 | |
224 | static SHELL_VAR *build_hashcmd __P((SHELL_VAR *)); | |
225 | static SHELL_VAR *get_hashcmd __P((SHELL_VAR *)); | |
226 | static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
2c471a92 | 227 | # if defined (ALIAS) |
fdf670ea CR |
228 | static SHELL_VAR *build_aliasvar __P((SHELL_VAR *)); |
229 | static SHELL_VAR *get_aliasvar __P((SHELL_VAR *)); | |
230 | static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
2c471a92 | 231 | # endif |
7117c2d2 JA |
232 | #endif |
233 | ||
234 | static SHELL_VAR *get_funcname __P((SHELL_VAR *)); | |
235 | static SHELL_VAR *init_funcname_var __P((void)); | |
236 | ||
237 | static void initialize_dynamic_variables __P((void)); | |
238 | ||
239 | static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *)); | |
f73dda09 | 240 | static SHELL_VAR *new_shell_variable __P((const char *)); |
7117c2d2 | 241 | static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *)); |
d11b8b46 | 242 | static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int)); |
7117c2d2 | 243 | |
fdf670ea | 244 | static void dispose_variable_value __P((SHELL_VAR *)); |
7117c2d2 JA |
245 | static void free_variable_hash_data __P((PTR_T)); |
246 | ||
247 | static VARLIST *vlist_alloc __P((int)); | |
248 | static VARLIST *vlist_realloc __P((VARLIST *, int)); | |
249 | static void vlist_add __P((VARLIST *, SHELL_VAR *, int)); | |
250 | ||
251 | static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int)); | |
252 | ||
253 | static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **)); | |
f73dda09 | 254 | |
7117c2d2 JA |
255 | static SHELL_VAR **vapply __P((sh_var_map_func_t *)); |
256 | static SHELL_VAR **fapply __P((sh_var_map_func_t *)); | |
f73dda09 JA |
257 | |
258 | static int visible_var __P((SHELL_VAR *)); | |
f73dda09 | 259 | static int visible_and_exported __P((SHELL_VAR *)); |
3a372c75 | 260 | static int export_environment_candidate __P((SHELL_VAR *)); |
7117c2d2 JA |
261 | static int local_and_exported __P((SHELL_VAR *)); |
262 | static int variable_in_context __P((SHELL_VAR *)); | |
f73dda09 JA |
263 | #if defined (ARRAY_VARS) |
264 | static int visible_array_vars __P((SHELL_VAR *)); | |
265 | #endif | |
266 | ||
7117c2d2 JA |
267 | static SHELL_VAR *bind_tempenv_variable __P((const char *, char *)); |
268 | static void push_temp_var __P((PTR_T)); | |
269 | static void propagate_temp_var __P((PTR_T)); | |
270 | static void dispose_temporary_env __P((sh_free_func_t *)); | |
271 | ||
f73dda09 | 272 | static inline char *mk_env_string __P((const char *, const char *)); |
7117c2d2 JA |
273 | static char **make_env_array_from_var_list __P((SHELL_VAR **)); |
274 | static char **make_var_export_array __P((VAR_CONTEXT *)); | |
275 | static char **make_func_export_array __P((void)); | |
276 | static void add_temp_array_to_env __P((char **, int, int)); | |
f73dda09 | 277 | |
7117c2d2 JA |
278 | static int n_shell_variables __P((void)); |
279 | static int set_context __P((SHELL_VAR *)); | |
726f6388 | 280 | |
7117c2d2 JA |
281 | static void push_func_var __P((PTR_T)); |
282 | static void push_exported_var __P((PTR_T)); | |
726f6388 | 283 | |
7117c2d2 | 284 | static inline int find_special_var __P((const char *)); |
28157acd | 285 | |
d3ad40de CR |
286 | static void |
287 | create_variable_tables () | |
288 | { | |
cce855bc | 289 | if (shell_variables == 0) |
7117c2d2 JA |
290 | { |
291 | shell_variables = global_variables = new_var_context ((char *)NULL, 0); | |
292 | shell_variables->scope = 0; | |
293 | shell_variables->table = hash_create (0); | |
294 | } | |
726f6388 | 295 | |
cce855bc | 296 | if (shell_functions == 0) |
7117c2d2 | 297 | shell_functions = hash_create (0); |
726f6388 | 298 | |
d3a24ed2 CR |
299 | #if defined (DEBUGGER) |
300 | if (shell_function_defs == 0) | |
301 | shell_function_defs = hash_create (0); | |
302 | #endif | |
d3ad40de CR |
303 | } |
304 | ||
305 | /* Initialize the shell variables from the current environment. | |
306 | If PRIVMODE is nonzero, don't import functions from ENV or | |
307 | parse $SHELLOPTS. */ | |
308 | void | |
309 | initialize_shell_variables (env, privmode) | |
310 | char **env; | |
311 | int privmode; | |
312 | { | |
313 | char *name, *string, *temp_string; | |
c5402025 | 314 | int c, char_index, string_index, string_length, ro; |
d3ad40de CR |
315 | SHELL_VAR *temp_var; |
316 | ||
317 | create_variable_tables (); | |
d3a24ed2 | 318 | |
ccc6cda3 | 319 | for (string_index = 0; string = env[string_index++]; ) |
726f6388 | 320 | { |
726f6388 | 321 | char_index = 0; |
d166f048 | 322 | name = string; |
726f6388 | 323 | while ((c = *string++) && c != '=') |
d166f048 JA |
324 | ; |
325 | if (string[-1] == '=') | |
28ef6c31 | 326 | char_index = string - name - 1; |
726f6388 | 327 | |
d166f048 JA |
328 | /* If there are weird things in the environment, like `=xxx' or a |
329 | string without an `=', just skip them. */ | |
330 | if (char_index == 0) | |
28ef6c31 | 331 | continue; |
d166f048 JA |
332 | |
333 | /* ASSERT(name[char_index] == '=') */ | |
726f6388 | 334 | name[char_index] = '\0'; |
d166f048 | 335 | /* Now, name = env variable name, string = env variable value, and |
28ef6c31 | 336 | char_index == strlen (name) */ |
726f6388 | 337 | |
012bac39 CR |
338 | temp_var = (SHELL_VAR *)NULL; |
339 | ||
f73dda09 | 340 | /* If exported function, define it now. Don't import functions from |
7117c2d2 | 341 | the environment in privileged mode. */ |
bb70624e | 342 | if (privmode == 0 && read_but_dont_execute == 0 && STREQN ("() {", string, 4)) |
726f6388 | 343 | { |
d166f048 | 344 | string_length = strlen (string); |
f73dda09 | 345 | temp_string = (char *)xmalloc (3 + string_length + char_index); |
bb70624e | 346 | |
d166f048 JA |
347 | strcpy (temp_string, name); |
348 | temp_string[char_index] = ' '; | |
349 | strcpy (temp_string + char_index + 1, string); | |
726f6388 | 350 | |
d166f048 | 351 | parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 | 352 | |
d166f048 JA |
353 | /* Ancient backwards compatibility. Old versions of bash exported |
354 | functions like name()=() {...} */ | |
355 | if (name[char_index - 1] == ')' && name[char_index - 2] == '(') | |
726f6388 JA |
356 | name[char_index - 2] = '\0'; |
357 | ||
ccc6cda3 | 358 | if (temp_var = find_function (name)) |
726f6388 | 359 | { |
bb70624e | 360 | VSETATTR (temp_var, (att_exported|att_imported)); |
726f6388 JA |
361 | array_needs_making = 1; |
362 | } | |
363 | else | |
1f6ec1a8 CR |
364 | { |
365 | last_command_exit_value = 1; | |
366 | report_error (_("error importing function definition for `%s'"), name); | |
367 | } | |
d166f048 | 368 | |
bb70624e | 369 | /* ( */ |
d166f048 | 370 | if (name[char_index - 1] == ')' && name[char_index - 2] == '\0') |
bb70624e | 371 | name[char_index - 2] = '('; /* ) */ |
726f6388 | 372 | } |
ccc6cda3 JA |
373 | #if defined (ARRAY_VARS) |
374 | # if 0 | |
375 | /* Array variables may not yet be exported. */ | |
43df7bbb | 376 | else if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')') |
ccc6cda3 JA |
377 | { |
378 | string_length = 1; | |
379 | temp_string = extract_array_assignment_list (string, &string_length); | |
380 | temp_var = assign_array_from_string (name, temp_string); | |
381 | FREE (temp_string); | |
bb70624e | 382 | VSETATTR (temp_var, (att_exported | att_imported)); |
ccc6cda3 JA |
383 | array_needs_making = 1; |
384 | } | |
385 | # endif | |
386 | #endif | |
3a372c75 | 387 | #if 0 |
f13513ff | 388 | else if (legal_identifier (name)) |
3a372c75 CR |
389 | #else |
390 | else | |
391 | #endif | |
726f6388 | 392 | { |
c5402025 CR |
393 | ro = 0; |
394 | if (posixly_correct && STREQ (name, "SHELLOPTS")) | |
395 | { | |
396 | temp_var = find_variable ("SHELLOPTS"); | |
397 | ro = temp_var && readonly_p (temp_var); | |
398 | if (temp_var) | |
399 | VUNSETATTR (temp_var, att_readonly); | |
400 | } | |
d11b8b46 | 401 | temp_var = bind_variable (name, string, 0); |
5f8cde23 CR |
402 | if (temp_var) |
403 | { | |
404 | if (legal_identifier (name)) | |
405 | VSETATTR (temp_var, (att_exported | att_imported)); | |
406 | else | |
407 | VSETATTR (temp_var, (att_exported | att_imported | att_invisible)); | |
c5402025 CR |
408 | if (ro) |
409 | VSETATTR (temp_var, att_readonly); | |
5f8cde23 CR |
410 | array_needs_making = 1; |
411 | } | |
726f6388 | 412 | } |
d166f048 JA |
413 | |
414 | name[char_index] = '='; | |
bb70624e | 415 | /* temp_var can be NULL if it was an exported function with a syntax |
28ef6c31 | 416 | error (a different bug, but it still shouldn't dump core). */ |
bb70624e JA |
417 | if (temp_var && function_p (temp_var) == 0) /* XXX not yet */ |
418 | { | |
419 | CACHE_IMPORTSTR (temp_var, name); | |
420 | } | |
726f6388 JA |
421 | } |
422 | ||
28ef6c31 | 423 | set_pwd (); |
b72432fd | 424 | |
ccc6cda3 | 425 | /* Set up initial value of $_ */ |
cc87ba64 | 426 | temp_var = set_if_not ("_", dollar_vars[0]); |
ccc6cda3 | 427 | |
726f6388 | 428 | /* Remember this pid. */ |
f73dda09 | 429 | dollar_dollar_pid = getpid (); |
726f6388 JA |
430 | |
431 | /* Now make our own defaults in case the vars that we think are | |
432 | important are missing. */ | |
433 | temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE); | |
f73dda09 JA |
434 | #if 0 |
435 | set_auto_export (temp_var); /* XXX */ | |
436 | #endif | |
726f6388 JA |
437 | |
438 | temp_var = set_if_not ("TERM", "dumb"); | |
f73dda09 JA |
439 | #if 0 |
440 | set_auto_export (temp_var); /* XXX */ | |
441 | #endif | |
726f6388 | 442 | |
70694d2e | 443 | #if defined (__QNX__) |
d166f048 JA |
444 | /* set node id -- don't import it from the environment */ |
445 | { | |
446 | char node_name[22]; | |
70694d2e | 447 | # if defined (__QNXNTO__) |
fd3925f1 CR |
448 | netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name)); |
449 | # else | |
d166f048 | 450 | qnx_nidtostr (getnid (), node_name, sizeof (node_name)); |
fd3925f1 | 451 | # endif |
d11b8b46 | 452 | temp_var = bind_variable ("NODE", node_name, 0); |
d166f048 JA |
453 | set_auto_export (temp_var); |
454 | } | |
455 | #endif | |
456 | ||
ccc6cda3 | 457 | /* set up the prompts. */ |
726f6388 JA |
458 | if (interactive_shell) |
459 | { | |
b72432fd | 460 | #if defined (PROMPT_STRING_DECODE) |
726f6388 | 461 | set_if_not ("PS1", primary_prompt); |
b72432fd JA |
462 | #else |
463 | if (current_user.uid == -1) | |
464 | get_current_user_info (); | |
465 | set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt); | |
466 | #endif | |
726f6388 JA |
467 | set_if_not ("PS2", secondary_prompt); |
468 | } | |
469 | set_if_not ("PS4", "+ "); | |
470 | ||
ccc6cda3 | 471 | /* Don't allow IFS to be imported from the environment. */ |
d11b8b46 | 472 | temp_var = bind_variable ("IFS", " \t\n", 0); |
7117c2d2 | 473 | setifs (temp_var); |
726f6388 JA |
474 | |
475 | /* Magic machine types. Pretty convenient. */ | |
f73dda09 | 476 | set_machine_vars (); |
726f6388 | 477 | |
ccc6cda3 JA |
478 | /* Default MAILCHECK for interactive shells. Defer the creation of a |
479 | default MAILPATH until the startup files are read, because MAIL | |
f73dda09 | 480 | names a mail file if MAILPATH is not set, and we should provide a |
ccc6cda3 | 481 | default only if neither is set. */ |
726f6388 | 482 | if (interactive_shell) |
6e70dbff CR |
483 | { |
484 | temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60"); | |
485 | VSETATTR (temp_var, att_integer); | |
486 | } | |
726f6388 JA |
487 | |
488 | /* Do some things with shell level. */ | |
d166f048 | 489 | initialize_shell_level (); |
726f6388 | 490 | |
b72432fd | 491 | set_ppid (); |
726f6388 | 492 | |
726f6388 | 493 | /* Initialize the `getopts' stuff. */ |
6e70dbff CR |
494 | temp_var = bind_variable ("OPTIND", "1", 0); |
495 | VSETATTR (temp_var, att_integer); | |
d166f048 | 496 | getopts_reset (0); |
d11b8b46 | 497 | bind_variable ("OPTERR", "1", 0); |
d166f048 JA |
498 | sh_opterr = 1; |
499 | ||
8d618825 | 500 | if (login_shell == 1 && posixly_correct == 0) |
d166f048 | 501 | set_home_var (); |
726f6388 JA |
502 | |
503 | /* Get the full pathname to THIS shell, and set the BASH variable | |
504 | to it. */ | |
d166f048 | 505 | name = get_bash_name (); |
d11b8b46 | 506 | temp_var = bind_variable ("BASH", name, 0); |
ccc6cda3 JA |
507 | free (name); |
508 | ||
509 | /* Make the exported environment variable SHELL be the user's login | |
510 | shell. Note that the `tset' command looks at this variable | |
511 | to determine what style of commands to output; if it ends in "csh", | |
512 | then C-shell commands are output, else Bourne shell commands. */ | |
d166f048 | 513 | set_shell_var (); |
726f6388 JA |
514 | |
515 | /* Make a variable called BASH_VERSION which contains the version info. */ | |
d11b8b46 | 516 | bind_variable ("BASH_VERSION", shell_version_string (), 0); |
ccc6cda3 JA |
517 | #if defined (ARRAY_VARS) |
518 | make_vers_array (); | |
519 | #endif | |
726f6388 | 520 | |
d3a24ed2 | 521 | if (command_execution_string) |
d11b8b46 | 522 | bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0); |
d3a24ed2 | 523 | |
726f6388 JA |
524 | /* Find out if we're supposed to be in Posix.2 mode via an |
525 | environment variable. */ | |
526 | temp_var = find_variable ("POSIXLY_CORRECT"); | |
527 | if (!temp_var) | |
528 | temp_var = find_variable ("POSIX_PEDANTIC"); | |
529 | if (temp_var && imported_p (temp_var)) | |
530 | sv_strict_posix (temp_var->name); | |
531 | ||
532 | #if defined (HISTORY) | |
533 | /* Set history variables to defaults, and then do whatever we would | |
534 | do if the variable had just been set. Do this only in the case | |
535 | that we are remembering commands on the history list. */ | |
536 | if (remember_on_history) | |
537 | { | |
7117c2d2 | 538 | name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0); |
726f6388 JA |
539 | |
540 | set_if_not ("HISTFILE", name); | |
541 | free (name); | |
726f6388 JA |
542 | } |
543 | #endif /* HISTORY */ | |
544 | ||
545 | /* Seed the random number generator. */ | |
35bb237e | 546 | seedrand (); |
726f6388 JA |
547 | |
548 | /* Handle some "special" variables that we may have inherited from a | |
549 | parent shell. */ | |
d166f048 JA |
550 | if (interactive_shell) |
551 | { | |
552 | temp_var = find_variable ("IGNOREEOF"); | |
553 | if (!temp_var) | |
554 | temp_var = find_variable ("ignoreeof"); | |
555 | if (temp_var && imported_p (temp_var)) | |
556 | sv_ignoreeof (temp_var->name); | |
557 | } | |
726f6388 JA |
558 | |
559 | #if defined (HISTORY) | |
560 | if (interactive_shell && remember_on_history) | |
561 | { | |
ccc6cda3 JA |
562 | sv_history_control ("HISTCONTROL"); |
563 | sv_histignore ("HISTIGNORE"); | |
d3ad40de | 564 | sv_histtimefmt ("HISTTIMEFORMAT"); |
726f6388 JA |
565 | } |
566 | #endif /* HISTORY */ | |
567 | ||
ac58e8c8 CR |
568 | #if defined (READLINE) && defined (STRICT_POSIX) |
569 | /* POSIXLY_CORRECT will only be 1 here if the shell was compiled | |
570 | -DSTRICT_POSIX */ | |
571 | if (interactive_shell && posixly_correct && no_line_editing == 0) | |
572 | rl_prefer_env_winsize = 1; | |
573 | #endif /* READLINE && STRICT_POSIX */ | |
574 | ||
f73dda09 JA |
575 | /* |
576 | * 24 October 2001 | |
577 | * | |
578 | * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT | |
579 | * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in | |
580 | * isnetconn() to avoid running the startup files more often than wanted. | |
581 | * That will, of course, only work if the user's login shell is bash, so | |
582 | * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined | |
583 | * in config-top.h. | |
584 | */ | |
585 | #if 0 | |
bb70624e | 586 | temp_var = find_variable ("SSH_CLIENT"); |
28ef6c31 JA |
587 | if (temp_var && imported_p (temp_var)) |
588 | { | |
589 | VUNSETATTR (temp_var, att_exported); | |
590 | array_needs_making = 1; | |
591 | } | |
592 | temp_var = find_variable ("SSH2_CLIENT"); | |
bb70624e JA |
593 | if (temp_var && imported_p (temp_var)) |
594 | { | |
595 | VUNSETATTR (temp_var, att_exported); | |
596 | array_needs_making = 1; | |
597 | } | |
f73dda09 | 598 | #endif |
bb70624e | 599 | |
ccc6cda3 JA |
600 | /* Get the user's real and effective user ids. */ |
601 | uidset (); | |
602 | ||
67362c60 CR |
603 | temp_var = find_variable ("BASH_XTRACEFD"); |
604 | if (temp_var && imported_p (temp_var)) | |
605 | sv_xtracefd (temp_var->name); | |
606 | ||
726f6388 JA |
607 | /* Initialize the dynamic variables, and seed their values. */ |
608 | initialize_dynamic_variables (); | |
726f6388 JA |
609 | } |
610 | ||
7117c2d2 JA |
611 | /* **************************************************************** */ |
612 | /* */ | |
613 | /* Setting values for special shell variables */ | |
614 | /* */ | |
615 | /* **************************************************************** */ | |
616 | ||
f73dda09 JA |
617 | static void |
618 | set_machine_vars () | |
619 | { | |
620 | SHELL_VAR *temp_var; | |
621 | ||
622 | temp_var = set_if_not ("HOSTTYPE", HOSTTYPE); | |
623 | temp_var = set_if_not ("OSTYPE", OSTYPE); | |
624 | temp_var = set_if_not ("MACHTYPE", MACHTYPE); | |
625 | ||
626 | temp_var = set_if_not ("HOSTNAME", current_host_name); | |
627 | } | |
628 | ||
d166f048 JA |
629 | /* Set $HOME to the information in the password file if we didn't get |
630 | it from the environment. */ | |
b72432fd JA |
631 | |
632 | /* This function is not static so the tilde and readline libraries can | |
633 | use it. */ | |
634 | char * | |
28ef6c31 | 635 | sh_get_home_dir () |
b72432fd JA |
636 | { |
637 | if (current_user.home_dir == 0) | |
638 | get_current_user_info (); | |
639 | return current_user.home_dir; | |
640 | } | |
641 | ||
d166f048 JA |
642 | static void |
643 | set_home_var () | |
644 | { | |
645 | SHELL_VAR *temp_var; | |
646 | ||
647 | temp_var = find_variable ("HOME"); | |
648 | if (temp_var == 0) | |
d11b8b46 | 649 | temp_var = bind_variable ("HOME", sh_get_home_dir (), 0); |
f73dda09 | 650 | #if 0 |
bb70624e | 651 | VSETATTR (temp_var, att_exported); |
f73dda09 | 652 | #endif |
d166f048 JA |
653 | } |
654 | ||
655 | /* Set $SHELL to the user's login shell if it is not already set. Call | |
656 | get_current_user_info if we haven't already fetched the shell. */ | |
657 | static void | |
658 | set_shell_var () | |
659 | { | |
660 | SHELL_VAR *temp_var; | |
661 | ||
662 | temp_var = find_variable ("SHELL"); | |
663 | if (temp_var == 0) | |
664 | { | |
665 | if (current_user.shell == 0) | |
666 | get_current_user_info (); | |
d11b8b46 | 667 | temp_var = bind_variable ("SHELL", current_user.shell, 0); |
d166f048 | 668 | } |
f73dda09 | 669 | #if 0 |
bb70624e | 670 | VSETATTR (temp_var, att_exported); |
f73dda09 | 671 | #endif |
d166f048 JA |
672 | } |
673 | ||
674 | static char * | |
675 | get_bash_name () | |
676 | { | |
677 | char *name; | |
678 | ||
28ef6c31 | 679 | if ((login_shell == 1) && RELPATH(shell_name)) |
d166f048 JA |
680 | { |
681 | if (current_user.shell == 0) | |
28ef6c31 | 682 | get_current_user_info (); |
d166f048 JA |
683 | name = savestring (current_user.shell); |
684 | } | |
28ef6c31 | 685 | else if (ABSPATH(shell_name)) |
d166f048 JA |
686 | name = savestring (shell_name); |
687 | else if (shell_name[0] == '.' && shell_name[1] == '/') | |
688 | { | |
689 | /* Fast path for common case. */ | |
690 | char *cdir; | |
691 | int len; | |
692 | ||
693 | cdir = get_string_value ("PWD"); | |
28ef6c31 JA |
694 | if (cdir) |
695 | { | |
696 | len = strlen (cdir); | |
f73dda09 | 697 | name = (char *)xmalloc (len + strlen (shell_name) + 1); |
28ef6c31 JA |
698 | strcpy (name, cdir); |
699 | strcpy (name + len, shell_name + 1); | |
700 | } | |
701 | else | |
702 | name = savestring (shell_name); | |
d166f048 JA |
703 | } |
704 | else | |
705 | { | |
706 | char *tname; | |
707 | int s; | |
708 | ||
709 | tname = find_user_command (shell_name); | |
710 | ||
711 | if (tname == 0) | |
712 | { | |
713 | /* Try the current directory. If there is not an executable | |
714 | there, just punt and use the login shell. */ | |
715 | s = file_status (shell_name); | |
716 | if (s & FS_EXECABLE) | |
717 | { | |
718 | tname = make_absolute (shell_name, get_string_value ("PWD")); | |
719 | if (*shell_name == '.') | |
720 | { | |
28ef6c31 | 721 | name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); |
d166f048 JA |
722 | if (name == 0) |
723 | name = tname; | |
724 | else | |
725 | free (tname); | |
726 | } | |
727 | else | |
728 | name = tname; | |
729 | } | |
730 | else | |
731 | { | |
732 | if (current_user.shell == 0) | |
733 | get_current_user_info (); | |
734 | name = savestring (current_user.shell); | |
735 | } | |
736 | } | |
737 | else | |
738 | { | |
739 | name = full_pathname (tname); | |
740 | free (tname); | |
741 | } | |
742 | } | |
743 | ||
744 | return (name); | |
745 | } | |
746 | ||
726f6388 JA |
747 | void |
748 | adjust_shell_level (change) | |
749 | int change; | |
750 | { | |
d166f048 | 751 | char new_level[5], *old_SHLVL; |
7117c2d2 | 752 | intmax_t old_level; |
d166f048 | 753 | SHELL_VAR *temp_var; |
726f6388 JA |
754 | |
755 | old_SHLVL = get_string_value ("SHLVL"); | |
f73dda09 JA |
756 | if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0) |
757 | old_level = 0; | |
726f6388 JA |
758 | |
759 | shell_level = old_level + change; | |
760 | if (shell_level < 0) | |
761 | shell_level = 0; | |
d166f048 JA |
762 | else if (shell_level > 1000) |
763 | { | |
5e13499c | 764 | internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level); |
d166f048 JA |
765 | shell_level = 1; |
766 | } | |
767 | ||
768 | /* We don't need the full generality of itos here. */ | |
769 | if (shell_level < 10) | |
770 | { | |
771 | new_level[0] = shell_level + '0'; | |
772 | new_level[1] = '\0'; | |
773 | } | |
774 | else if (shell_level < 100) | |
775 | { | |
776 | new_level[0] = (shell_level / 10) + '0'; | |
777 | new_level[1] = (shell_level % 10) + '0'; | |
778 | new_level[2] = '\0'; | |
779 | } | |
780 | else if (shell_level < 1000) | |
781 | { | |
782 | new_level[0] = (shell_level / 100) + '0'; | |
783 | old_level = shell_level % 100; | |
784 | new_level[1] = (old_level / 10) + '0'; | |
785 | new_level[2] = (old_level % 10) + '0'; | |
786 | new_level[3] = '\0'; | |
787 | } | |
788 | ||
d11b8b46 | 789 | temp_var = bind_variable ("SHLVL", new_level, 0); |
d166f048 JA |
790 | set_auto_export (temp_var); |
791 | } | |
792 | ||
793 | static void | |
794 | initialize_shell_level () | |
795 | { | |
d166f048 | 796 | adjust_shell_level (1); |
726f6388 JA |
797 | } |
798 | ||
28ef6c31 JA |
799 | /* If we got PWD from the environment, update our idea of the current |
800 | working directory. In any case, make sure that PWD exists before | |
801 | checking it. It is possible for getcwd () to fail on shell startup, | |
802 | and in that case, PWD would be undefined. If this is an interactive | |
803 | login shell, see if $HOME is the current working directory, and if | |
804 | that's not the same string as $PWD, set PWD=$HOME. */ | |
805 | ||
806 | void | |
807 | set_pwd () | |
808 | { | |
809 | SHELL_VAR *temp_var, *home_var; | |
810 | char *temp_string, *home_string; | |
811 | ||
812 | home_var = find_variable ("HOME"); | |
813 | home_string = home_var ? value_cell (home_var) : (char *)NULL; | |
814 | ||
815 | temp_var = find_variable ("PWD"); | |
816 | if (temp_var && imported_p (temp_var) && | |
817 | (temp_string = value_cell (temp_var)) && | |
818 | same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL)) | |
819 | set_working_directory (temp_string); | |
820 | else if (home_string && interactive_shell && login_shell && | |
821 | same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL)) | |
822 | { | |
823 | set_working_directory (home_string); | |
d11b8b46 | 824 | temp_var = bind_variable ("PWD", home_string, 0); |
28ef6c31 JA |
825 | set_auto_export (temp_var); |
826 | } | |
827 | else | |
828 | { | |
829 | temp_string = get_working_directory ("shell-init"); | |
830 | if (temp_string) | |
831 | { | |
d11b8b46 | 832 | temp_var = bind_variable ("PWD", temp_string, 0); |
28ef6c31 JA |
833 | set_auto_export (temp_var); |
834 | free (temp_string); | |
835 | } | |
836 | } | |
837 | ||
838 | /* According to the Single Unix Specification, v2, $OLDPWD is an | |
839 | `environment variable' and therefore should be auto-exported. | |
840 | Make a dummy invisible variable for OLDPWD, and mark it as exported. */ | |
d11b8b46 | 841 | temp_var = bind_variable ("OLDPWD", (char *)NULL, 0); |
28ef6c31 JA |
842 | VSETATTR (temp_var, (att_exported | att_invisible)); |
843 | } | |
844 | ||
b72432fd JA |
845 | /* Make a variable $PPID, which holds the pid of the shell's parent. */ |
846 | void | |
847 | set_ppid () | |
848 | { | |
f73dda09 | 849 | char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name; |
b72432fd JA |
850 | SHELL_VAR *temp_var; |
851 | ||
f73dda09 | 852 | name = inttostr (getppid (), namebuf, sizeof(namebuf)); |
b72432fd JA |
853 | temp_var = find_variable ("PPID"); |
854 | if (temp_var) | |
bb70624e | 855 | VUNSETATTR (temp_var, (att_readonly | att_exported)); |
d11b8b46 | 856 | temp_var = bind_variable ("PPID", name, 0); |
bb70624e | 857 | VSETATTR (temp_var, (att_readonly | att_integer)); |
b72432fd JA |
858 | } |
859 | ||
ccc6cda3 JA |
860 | static void |
861 | uidset () | |
726f6388 | 862 | { |
f73dda09 | 863 | char buff[INT_STRLEN_BOUND(uid_t) + 1], *b; |
ccc6cda3 JA |
864 | register SHELL_VAR *v; |
865 | ||
b72432fd | 866 | b = inttostr (current_user.uid, buff, sizeof (buff)); |
ccc6cda3 | 867 | v = find_variable ("UID"); |
28ef6c31 JA |
868 | if (v == 0) |
869 | { | |
d11b8b46 | 870 | v = bind_variable ("UID", b, 0); |
28ef6c31 JA |
871 | VSETATTR (v, (att_readonly | att_integer)); |
872 | } | |
726f6388 | 873 | |
ccc6cda3 | 874 | if (current_user.euid != current_user.uid) |
b72432fd | 875 | b = inttostr (current_user.euid, buff, sizeof (buff)); |
726f6388 | 876 | |
ccc6cda3 | 877 | v = find_variable ("EUID"); |
28ef6c31 JA |
878 | if (v == 0) |
879 | { | |
d11b8b46 | 880 | v = bind_variable ("EUID", b, 0); |
28ef6c31 JA |
881 | VSETATTR (v, (att_readonly | att_integer)); |
882 | } | |
ccc6cda3 JA |
883 | } |
884 | ||
885 | #if defined (ARRAY_VARS) | |
886 | static void | |
887 | make_vers_array () | |
888 | { | |
889 | SHELL_VAR *vv; | |
890 | ARRAY *av; | |
f73dda09 | 891 | char *s, d[32], b[INT_STRLEN_BOUND(int) + 1]; |
ccc6cda3 | 892 | |
7117c2d2 | 893 | unbind_variable ("BASH_VERSINFO"); |
ccc6cda3 JA |
894 | |
895 | vv = make_new_array_variable ("BASH_VERSINFO"); | |
896 | av = array_cell (vv); | |
897 | strcpy (d, dist_version); | |
d0ca3503 | 898 | s = strchr (d, '.'); |
ccc6cda3 JA |
899 | if (s) |
900 | *s++ = '\0'; | |
7117c2d2 JA |
901 | array_insert (av, 0, d); |
902 | array_insert (av, 1, s); | |
f73dda09 | 903 | s = inttostr (patch_level, b, sizeof (b)); |
7117c2d2 | 904 | array_insert (av, 2, s); |
f73dda09 | 905 | s = inttostr (build_version, b, sizeof (b)); |
7117c2d2 JA |
906 | array_insert (av, 3, s); |
907 | array_insert (av, 4, release_status); | |
908 | array_insert (av, 5, MACHTYPE); | |
ccc6cda3 | 909 | |
bb70624e | 910 | VSETATTR (vv, att_readonly); |
ccc6cda3 JA |
911 | } |
912 | #endif /* ARRAY_VARS */ | |
913 | ||
914 | /* Set the environment variables $LINES and $COLUMNS in response to | |
915 | a window size change. */ | |
916 | void | |
28ef6c31 | 917 | sh_set_lines_and_columns (lines, cols) |
ccc6cda3 JA |
918 | int lines, cols; |
919 | { | |
f73dda09 | 920 | char val[INT_STRLEN_BOUND(int) + 1], *v; |
ccc6cda3 | 921 | |
af12dacd | 922 | #if defined (READLINE) |
ac58e8c8 CR |
923 | /* If we are currently assigning to LINES or COLUMNS, don't do anything. */ |
924 | if (winsize_assignment) | |
925 | return; | |
af12dacd | 926 | #endif |
ac58e8c8 | 927 | |
b72432fd | 928 | v = inttostr (lines, val, sizeof (val)); |
d11b8b46 | 929 | bind_variable ("LINES", v, 0); |
ccc6cda3 | 930 | |
b72432fd | 931 | v = inttostr (cols, val, sizeof (val)); |
d11b8b46 | 932 | bind_variable ("COLUMNS", v, 0); |
726f6388 JA |
933 | } |
934 | ||
7117c2d2 JA |
935 | /* **************************************************************** */ |
936 | /* */ | |
937 | /* Printing variables and values */ | |
938 | /* */ | |
939 | /* **************************************************************** */ | |
726f6388 | 940 | |
28ef6c31 JA |
941 | /* Print LIST (a list of shell variables) to stdout in such a way that |
942 | they can be read back in. */ | |
726f6388 JA |
943 | void |
944 | print_var_list (list) | |
945 | register SHELL_VAR **list; | |
946 | { | |
947 | register int i; | |
948 | register SHELL_VAR *var; | |
949 | ||
950 | for (i = 0; list && (var = list[i]); i++) | |
7117c2d2 | 951 | if (invisible_p (var) == 0) |
726f6388 JA |
952 | print_assignment (var); |
953 | } | |
954 | ||
28ef6c31 JA |
955 | /* Print LIST (a list of shell functions) to stdout in such a way that |
956 | they can be read back in. */ | |
957 | void | |
958 | print_func_list (list) | |
959 | register SHELL_VAR **list; | |
960 | { | |
961 | register int i; | |
962 | register SHELL_VAR *var; | |
963 | ||
964 | for (i = 0; list && (var = list[i]); i++) | |
965 | { | |
966 | printf ("%s ", var->name); | |
967 | print_var_function (var); | |
968 | printf ("\n"); | |
969 | } | |
970 | } | |
971 | ||
726f6388 JA |
972 | /* Print the value of a single SHELL_VAR. No newline is |
973 | output, but the variable is printed in such a way that | |
974 | it can be read back in. */ | |
975 | void | |
976 | print_assignment (var) | |
977 | SHELL_VAR *var; | |
978 | { | |
7117c2d2 JA |
979 | if (var_isset (var) == 0) |
980 | return; | |
981 | ||
982 | if (function_p (var)) | |
726f6388 | 983 | { |
28ef6c31 | 984 | printf ("%s", var->name); |
726f6388 JA |
985 | print_var_function (var); |
986 | printf ("\n"); | |
987 | } | |
ccc6cda3 | 988 | #if defined (ARRAY_VARS) |
7117c2d2 | 989 | else if (array_p (var)) |
ccc6cda3 | 990 | print_array_assignment (var, 0); |
fdf670ea CR |
991 | else if (assoc_p (var)) |
992 | print_assoc_assignment (var, 0); | |
ccc6cda3 | 993 | #endif /* ARRAY_VARS */ |
7117c2d2 | 994 | else |
726f6388 JA |
995 | { |
996 | printf ("%s=", var->name); | |
ccc6cda3 | 997 | print_var_value (var, 1); |
726f6388 JA |
998 | printf ("\n"); |
999 | } | |
1000 | } | |
1001 | ||
1002 | /* Print the value cell of VAR, a shell variable. Do not print | |
ccc6cda3 JA |
1003 | the name, nor leading/trailing newline. If QUOTE is non-zero, |
1004 | and the value contains shell metacharacters, quote the value | |
1005 | in such a way that it can be read back in. */ | |
726f6388 | 1006 | void |
ccc6cda3 | 1007 | print_var_value (var, quote) |
726f6388 | 1008 | SHELL_VAR *var; |
ccc6cda3 | 1009 | int quote; |
726f6388 | 1010 | { |
ccc6cda3 JA |
1011 | char *t; |
1012 | ||
7117c2d2 JA |
1013 | if (var_isset (var) == 0) |
1014 | return; | |
1015 | ||
1016 | if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var))) | |
ccc6cda3 | 1017 | { |
7117c2d2 JA |
1018 | t = ansic_quote (value_cell (var), 0, (int *)0); |
1019 | printf ("%s", t); | |
1020 | free (t); | |
1021 | } | |
1022 | else if (quote && sh_contains_shell_metas (value_cell (var))) | |
1023 | { | |
1024 | t = sh_single_quote (value_cell (var)); | |
1025 | printf ("%s", t); | |
1026 | free (t); | |
ccc6cda3 | 1027 | } |
7117c2d2 JA |
1028 | else |
1029 | printf ("%s", value_cell (var)); | |
726f6388 JA |
1030 | } |
1031 | ||
1032 | /* Print the function cell of VAR, a shell variable. Do not | |
1033 | print the name, nor leading/trailing newline. */ | |
1034 | void | |
1035 | print_var_function (var) | |
1036 | SHELL_VAR *var; | |
1037 | { | |
b0c16657 CR |
1038 | char *x; |
1039 | ||
7117c2d2 | 1040 | if (function_p (var) && var_isset (var)) |
b0c16657 CR |
1041 | { |
1042 | x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL); | |
1043 | printf ("%s", x); | |
1044 | } | |
726f6388 JA |
1045 | } |
1046 | ||
1047 | /* **************************************************************** */ | |
ccc6cda3 | 1048 | /* */ |
7117c2d2 | 1049 | /* Dynamic Variables */ |
ccc6cda3 | 1050 | /* */ |
726f6388 JA |
1051 | /* **************************************************************** */ |
1052 | ||
1053 | /* DYNAMIC VARIABLES | |
ccc6cda3 | 1054 | |
726f6388 JA |
1055 | These are variables whose values are generated anew each time they are |
1056 | referenced. These are implemented using a pair of function pointers | |
7117c2d2 JA |
1057 | in the struct variable: assign_func, which is called from bind_variable |
1058 | and, if arrays are compiled into the shell, some of the functions in | |
1059 | arrayfunc.c, and dynamic_value, which is called from find_variable. | |
1060 | ||
1061 | assign_func is called from bind_variable_internal, if | |
1062 | bind_variable_internal discovers that the variable being assigned to | |
1063 | has such a function. The function is called as | |
1064 | SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind) | |
726f6388 | 1065 | and the (SHELL_VAR *)temp is returned as the value of bind_variable. It |
7117c2d2 JA |
1066 | is usually ENTRY (self). IND is an index for an array variable, and |
1067 | unused otherwise. | |
ccc6cda3 | 1068 | |
7117c2d2 JA |
1069 | dynamic_value is called from find_variable_internal to return a `new' |
1070 | value for the specified dynamic varible. If this function is NULL, | |
1071 | the variable is treated as a `normal' shell variable. If it is not, | |
1072 | however, then this function is called like this: | |
1073 | tempvar = (*(var->dynamic_value)) (var); | |
ccc6cda3 | 1074 | |
726f6388 JA |
1075 | Sometimes `tempvar' will replace the value of `var'. Other times, the |
1076 | shell will simply use the string value. Pretty object-oriented, huh? | |
ccc6cda3 | 1077 | |
726f6388 JA |
1078 | Be warned, though: if you `unset' a special variable, it loses its |
1079 | special meaning, even if you subsequently set it. | |
ccc6cda3 | 1080 | |
726f6388 | 1081 | The special assignment code would probably have been better put in |
7117c2d2 | 1082 | subst.c: do_assignment_internal, in the same style as |
726f6388 JA |
1083 | stupidly_hack_special_variables, but I wanted the changes as |
1084 | localized as possible. */ | |
1085 | ||
f73dda09 JA |
1086 | #define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \ |
1087 | do \ | |
1088 | { \ | |
d11b8b46 | 1089 | v = bind_variable (var, (val), 0); \ |
f73dda09 JA |
1090 | v->dynamic_value = gfunc; \ |
1091 | v->assign_func = afunc; \ | |
1092 | } \ | |
1093 | while (0) | |
1094 | ||
1095 | #define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \ | |
1096 | do \ | |
1097 | { \ | |
1098 | v = make_new_array_variable (var); \ | |
1099 | v->dynamic_value = gfunc; \ | |
1100 | v->assign_func = afunc; \ | |
1101 | } \ | |
1102 | while (0) | |
1103 | ||
fdf670ea CR |
1104 | #define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \ |
1105 | do \ | |
1106 | { \ | |
1107 | v = make_new_assoc_variable (var); \ | |
1108 | v->dynamic_value = gfunc; \ | |
1109 | v->assign_func = afunc; \ | |
1110 | } \ | |
1111 | while (0) | |
1112 | ||
bb70624e | 1113 | static SHELL_VAR * |
fdf670ea | 1114 | null_assign (self, value, unused, key) |
bb70624e JA |
1115 | SHELL_VAR *self; |
1116 | char *value; | |
7117c2d2 | 1117 | arrayind_t unused; |
fdf670ea | 1118 | char *key; |
bb70624e JA |
1119 | { |
1120 | return (self); | |
1121 | } | |
1122 | ||
1123 | #if defined (ARRAY_VARS) | |
1124 | static SHELL_VAR * | |
fdf670ea | 1125 | null_array_assign (self, value, ind, key) |
bb70624e | 1126 | SHELL_VAR *self; |
bb70624e | 1127 | char *value; |
7117c2d2 | 1128 | arrayind_t ind; |
fdf670ea | 1129 | char *key; |
bb70624e JA |
1130 | { |
1131 | return (self); | |
1132 | } | |
1133 | #endif | |
1134 | ||
d3a24ed2 CR |
1135 | /* Degenerate `dynamic_value' function; just returns what's passed without |
1136 | manipulation. */ | |
1137 | static SHELL_VAR * | |
1138 | get_self (self) | |
1139 | SHELL_VAR *self; | |
1140 | { | |
1141 | return (self); | |
1142 | } | |
1143 | ||
1144 | #if defined (ARRAY_VARS) | |
1145 | /* A generic dynamic array variable initializer. Intialize array variable | |
1146 | NAME with dynamic value function GETFUNC and assignment function SETFUNC. */ | |
1147 | static SHELL_VAR * | |
1148 | init_dynamic_array_var (name, getfunc, setfunc, attrs) | |
1149 | char *name; | |
1150 | sh_var_value_func_t *getfunc; | |
1151 | sh_var_assign_func_t *setfunc; | |
1152 | int attrs; | |
1153 | { | |
1154 | SHELL_VAR *v; | |
1155 | ||
1156 | v = find_variable (name); | |
1157 | if (v) | |
1158 | return (v); | |
1159 | INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc); | |
1160 | if (attrs) | |
1161 | VSETATTR (v, attrs); | |
1162 | return v; | |
1163 | } | |
d3a24ed2 | 1164 | |
fdf670ea CR |
1165 | static SHELL_VAR * |
1166 | init_dynamic_assoc_var (name, getfunc, setfunc, attrs) | |
1167 | char *name; | |
1168 | sh_var_value_func_t *getfunc; | |
1169 | sh_var_assign_func_t *setfunc; | |
1170 | int attrs; | |
1171 | { | |
1172 | SHELL_VAR *v; | |
1173 | ||
1174 | v = find_variable (name); | |
1175 | if (v) | |
1176 | return (v); | |
1177 | INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc); | |
1178 | if (attrs) | |
1179 | VSETATTR (v, attrs); | |
1180 | return v; | |
1181 | } | |
1182 | #endif | |
d3a24ed2 | 1183 | |
726f6388 JA |
1184 | /* The value of $SECONDS. This is the number of seconds since shell |
1185 | invocation, or, the number of seconds since the last assignment + the | |
1186 | value of the last assignment. */ | |
7117c2d2 | 1187 | static intmax_t seconds_value_assigned; |
726f6388 JA |
1188 | |
1189 | static SHELL_VAR * | |
fdf670ea | 1190 | assign_seconds (self, value, unused, key) |
726f6388 JA |
1191 | SHELL_VAR *self; |
1192 | char *value; | |
7117c2d2 | 1193 | arrayind_t unused; |
fdf670ea | 1194 | char *key; |
726f6388 | 1195 | { |
f73dda09 JA |
1196 | if (legal_number (value, &seconds_value_assigned) == 0) |
1197 | seconds_value_assigned = 0; | |
726f6388 JA |
1198 | shell_start_time = NOW; |
1199 | return (self); | |
1200 | } | |
1201 | ||
1202 | static SHELL_VAR * | |
1203 | get_seconds (var) | |
1204 | SHELL_VAR *var; | |
1205 | { | |
1206 | time_t time_since_start; | |
1207 | char *p; | |
1208 | ||
1209 | time_since_start = NOW - shell_start_time; | |
f73dda09 | 1210 | p = itos(seconds_value_assigned + time_since_start); |
726f6388 | 1211 | |
7117c2d2 | 1212 | FREE (value_cell (var)); |
726f6388 | 1213 | |
bb70624e | 1214 | VSETATTR (var, att_integer); |
7117c2d2 | 1215 | var_setvalue (var, p); |
726f6388 JA |
1216 | return (var); |
1217 | } | |
1218 | ||
f73dda09 JA |
1219 | static SHELL_VAR * |
1220 | init_seconds_var () | |
1221 | { | |
1222 | SHELL_VAR *v; | |
1223 | ||
1224 | v = find_variable ("SECONDS"); | |
1225 | if (v) | |
1226 | { | |
1227 | if (legal_number (value_cell(v), &seconds_value_assigned) == 0) | |
1228 | seconds_value_assigned = 0; | |
1229 | } | |
7117c2d2 | 1230 | INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds); |
f73dda09 JA |
1231 | return v; |
1232 | } | |
1233 | ||
726f6388 JA |
1234 | /* The random number seed. You can change this by setting RANDOM. */ |
1235 | static unsigned long rseed = 1; | |
f73dda09 | 1236 | static int last_random_value; |
227f982e | 1237 | static int seeded_subshell = 0; |
726f6388 | 1238 | |
f73dda09 | 1239 | /* A linear congruential random number generator based on the example |
7117c2d2 | 1240 | one in the ANSI C standard. This one isn't very good, but a more |
f73dda09 | 1241 | complicated one is overkill. */ |
726f6388 JA |
1242 | |
1243 | /* Returns a pseudo-random number between 0 and 32767. */ | |
1244 | static int | |
1245 | brand () | |
1246 | { | |
35bb237e CR |
1247 | /* From "Random number generators: good ones are hard to find", |
1248 | Park and Miller, Communications of the ACM, vol. 31, no. 10, | |
1249 | October 1988, p. 1195. filtered through FreeBSD */ | |
1250 | long h, l; | |
1251 | ||
f894a2d3 | 1252 | /* Can't seed with 0. */ |
35bb237e | 1253 | if (rseed == 0) |
f894a2d3 | 1254 | rseed = 123459876; |
35bb237e CR |
1255 | h = rseed / 127773; |
1256 | l = rseed % 127773; | |
1257 | rseed = 16807 * l - 2836 * h; | |
48ff5447 | 1258 | #if 0 |
35bb237e CR |
1259 | if (rseed < 0) |
1260 | rseed += 0x7fffffff; | |
48ff5447 | 1261 | #endif |
35bb237e | 1262 | return ((unsigned int)(rseed & 32767)); /* was % 32768 */ |
726f6388 JA |
1263 | } |
1264 | ||
1265 | /* Set the random number generator seed to SEED. */ | |
1266 | static void | |
1267 | sbrand (seed) | |
f73dda09 | 1268 | unsigned long seed; |
726f6388 JA |
1269 | { |
1270 | rseed = seed; | |
e8ce775d | 1271 | last_random_value = 0; |
726f6388 JA |
1272 | } |
1273 | ||
35bb237e CR |
1274 | static void |
1275 | seedrand () | |
1276 | { | |
1277 | struct timeval tv; | |
1278 | ||
1279 | gettimeofday (&tv, NULL); | |
1280 | sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ()); | |
1281 | } | |
1282 | ||
726f6388 | 1283 | static SHELL_VAR * |
fdf670ea | 1284 | assign_random (self, value, unused, key) |
726f6388 JA |
1285 | SHELL_VAR *self; |
1286 | char *value; | |
7117c2d2 | 1287 | arrayind_t unused; |
fdf670ea | 1288 | char *key; |
726f6388 | 1289 | { |
f73dda09 | 1290 | sbrand (strtoul (value, (char **)NULL, 10)); |
227f982e | 1291 | if (subshell_environment) |
97c2aab2 | 1292 | seeded_subshell = getpid (); |
726f6388 JA |
1293 | return (self); |
1294 | } | |
1295 | ||
28ef6c31 JA |
1296 | int |
1297 | get_random_number () | |
726f6388 | 1298 | { |
97c2aab2 | 1299 | int rv, pid; |
726f6388 | 1300 | |
ccc6cda3 | 1301 | /* Reset for command and process substitution. */ |
97c2aab2 CR |
1302 | pid = getpid (); |
1303 | if (subshell_environment && seeded_subshell != pid) | |
227f982e | 1304 | { |
35bb237e | 1305 | seedrand (); |
97c2aab2 | 1306 | seeded_subshell = pid; |
227f982e | 1307 | } |
ccc6cda3 JA |
1308 | |
1309 | do | |
1310 | rv = brand (); | |
f73dda09 | 1311 | while (rv == last_random_value); |
28ef6c31 JA |
1312 | return rv; |
1313 | } | |
ccc6cda3 | 1314 | |
28ef6c31 JA |
1315 | static SHELL_VAR * |
1316 | get_random (var) | |
1317 | SHELL_VAR *var; | |
1318 | { | |
1319 | int rv; | |
1320 | char *p; | |
1321 | ||
1322 | rv = get_random_number (); | |
ccc6cda3 | 1323 | last_random_value = rv; |
f73dda09 | 1324 | p = itos (rv); |
726f6388 | 1325 | |
7117c2d2 | 1326 | FREE (value_cell (var)); |
726f6388 | 1327 | |
bb70624e | 1328 | VSETATTR (var, att_integer); |
7117c2d2 | 1329 | var_setvalue (var, p); |
726f6388 JA |
1330 | return (var); |
1331 | } | |
1332 | ||
7117c2d2 | 1333 | static SHELL_VAR * |
fdf670ea | 1334 | assign_lineno (var, value, unused, key) |
7117c2d2 JA |
1335 | SHELL_VAR *var; |
1336 | char *value; | |
1337 | arrayind_t unused; | |
fdf670ea | 1338 | char *key; |
7117c2d2 JA |
1339 | { |
1340 | intmax_t new_value; | |
1341 | ||
1342 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1343 | new_value = 0; | |
048b249e | 1344 | line_number = line_number_base = new_value; |
7117c2d2 JA |
1345 | return var; |
1346 | } | |
1347 | ||
726f6388 JA |
1348 | /* Function which returns the current line number. */ |
1349 | static SHELL_VAR * | |
1350 | get_lineno (var) | |
1351 | SHELL_VAR *var; | |
1352 | { | |
1353 | char *p; | |
ccc6cda3 | 1354 | int ln; |
726f6388 | 1355 | |
ccc6cda3 JA |
1356 | ln = executing_line_number (); |
1357 | p = itos (ln); | |
7117c2d2 JA |
1358 | FREE (value_cell (var)); |
1359 | var_setvalue (var, p); | |
726f6388 JA |
1360 | return (var); |
1361 | } | |
1362 | ||
d3a24ed2 | 1363 | static SHELL_VAR * |
fdf670ea | 1364 | assign_subshell (var, value, unused, key) |
d3a24ed2 CR |
1365 | SHELL_VAR *var; |
1366 | char *value; | |
1367 | arrayind_t unused; | |
fdf670ea | 1368 | char *key; |
d3a24ed2 CR |
1369 | { |
1370 | intmax_t new_value; | |
1371 | ||
1372 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1373 | new_value = 0; | |
1374 | subshell_level = new_value; | |
1375 | return var; | |
1376 | } | |
1377 | ||
1378 | static SHELL_VAR * | |
1379 | get_subshell (var) | |
1380 | SHELL_VAR *var; | |
1381 | { | |
1382 | char *p; | |
1383 | ||
1384 | p = itos (subshell_level); | |
1385 | FREE (value_cell (var)); | |
1386 | var_setvalue (var, p); | |
1387 | return (var); | |
1388 | } | |
1389 | ||
d3ad40de CR |
1390 | static SHELL_VAR * |
1391 | get_bashpid (var) | |
1392 | SHELL_VAR *var; | |
1393 | { | |
1394 | int pid; | |
1395 | char *p; | |
1396 | ||
1397 | pid = getpid (); | |
1398 | p = itos (pid); | |
1399 | ||
1400 | FREE (value_cell (var)); | |
1401 | VSETATTR (var, att_integer|att_readonly); | |
1402 | var_setvalue (var, p); | |
1403 | return (var); | |
1404 | } | |
1405 | ||
d3a24ed2 CR |
1406 | static SHELL_VAR * |
1407 | get_bash_command (var) | |
1408 | SHELL_VAR *var; | |
1409 | { | |
1410 | char *p; | |
fdf670ea | 1411 | |
43df7bbb CR |
1412 | if (the_printed_command_except_trap) |
1413 | p = savestring (the_printed_command_except_trap); | |
1414 | else | |
1415 | { | |
1416 | p = (char *)xmalloc (1); | |
1417 | p[0] = '\0'; | |
1418 | } | |
d3a24ed2 CR |
1419 | FREE (value_cell (var)); |
1420 | var_setvalue (var, p); | |
1421 | return (var); | |
1422 | } | |
1423 | ||
726f6388 JA |
1424 | #if defined (HISTORY) |
1425 | static SHELL_VAR * | |
1426 | get_histcmd (var) | |
1427 | SHELL_VAR *var; | |
1428 | { | |
1429 | char *p; | |
1430 | ||
1431 | p = itos (history_number ()); | |
7117c2d2 JA |
1432 | FREE (value_cell (var)); |
1433 | var_setvalue (var, p); | |
726f6388 JA |
1434 | return (var); |
1435 | } | |
1436 | #endif | |
1437 | ||
d3a24ed2 CR |
1438 | #if defined (READLINE) |
1439 | /* When this function returns, VAR->value points to malloced memory. */ | |
1440 | static SHELL_VAR * | |
1441 | get_comp_wordbreaks (var) | |
1442 | SHELL_VAR *var; | |
1443 | { | |
d3a24ed2 CR |
1444 | /* If we don't have anything yet, assign a default value. */ |
1445 | if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0) | |
1446 | enable_hostname_completion (perform_hostname_completion); | |
1447 | ||
1fa6db60 CR |
1448 | FREE (value_cell (var)); |
1449 | var_setvalue (var, savestring (rl_completer_word_break_characters)); | |
d3a24ed2 CR |
1450 | |
1451 | return (var); | |
1452 | } | |
1453 | ||
1454 | /* When this function returns, rl_completer_word_break_characters points to | |
1455 | malloced memory. */ | |
1456 | static SHELL_VAR * | |
fdf670ea | 1457 | assign_comp_wordbreaks (self, value, unused, key) |
d3a24ed2 CR |
1458 | SHELL_VAR *self; |
1459 | char *value; | |
1460 | arrayind_t unused; | |
fdf670ea | 1461 | char *key; |
d3a24ed2 CR |
1462 | { |
1463 | if (rl_completer_word_break_characters && | |
1464 | rl_completer_word_break_characters != rl_basic_word_break_characters) | |
1465 | free (rl_completer_word_break_characters); | |
1466 | ||
1467 | rl_completer_word_break_characters = savestring (value); | |
1468 | return self; | |
1469 | } | |
1470 | #endif /* READLINE */ | |
1471 | ||
ccc6cda3 | 1472 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
d3a24ed2 | 1473 | static SHELL_VAR * |
fdf670ea | 1474 | assign_dirstack (self, value, ind, key) |
7117c2d2 JA |
1475 | SHELL_VAR *self; |
1476 | char *value; | |
1477 | arrayind_t ind; | |
fdf670ea | 1478 | char *key; |
7117c2d2 JA |
1479 | { |
1480 | set_dirstack_element (ind, 1, value); | |
1481 | return self; | |
1482 | } | |
1483 | ||
ccc6cda3 JA |
1484 | static SHELL_VAR * |
1485 | get_dirstack (self) | |
1486 | SHELL_VAR *self; | |
1487 | { | |
1488 | ARRAY *a; | |
1489 | WORD_LIST *l; | |
1490 | ||
74d9692b | 1491 | l = get_directory_stack (0); |
7117c2d2 JA |
1492 | a = array_from_word_list (l); |
1493 | array_dispose (array_cell (self)); | |
d166f048 | 1494 | dispose_words (l); |
7117c2d2 | 1495 | var_setarray (self, a); |
ccc6cda3 JA |
1496 | return self; |
1497 | } | |
1498 | #endif /* PUSHD AND POPD && ARRAY_VARS */ | |
1499 | ||
d166f048 JA |
1500 | #if defined (ARRAY_VARS) |
1501 | /* We don't want to initialize the group set with a call to getgroups() | |
1502 | unless we're asked to, but we only want to do it once. */ | |
1503 | static SHELL_VAR * | |
1504 | get_groupset (self) | |
1505 | SHELL_VAR *self; | |
1506 | { | |
1507 | register int i; | |
1508 | int ng; | |
1509 | ARRAY *a; | |
1510 | static char **group_set = (char **)NULL; | |
1511 | ||
1512 | if (group_set == 0) | |
1513 | { | |
1514 | group_set = get_group_list (&ng); | |
1515 | a = array_cell (self); | |
1516 | for (i = 0; i < ng; i++) | |
7117c2d2 | 1517 | array_insert (a, i, group_set[i]); |
d166f048 JA |
1518 | } |
1519 | return (self); | |
1520 | } | |
fdf670ea CR |
1521 | |
1522 | static SHELL_VAR * | |
1523 | build_hashcmd (self) | |
1524 | SHELL_VAR *self; | |
1525 | { | |
1526 | HASH_TABLE *h; | |
1527 | int i; | |
1528 | char *k, *v; | |
1529 | BUCKET_CONTENTS *item; | |
1530 | ||
1531 | h = assoc_cell (self); | |
1532 | if (h) | |
1533 | assoc_dispose (h); | |
1534 | ||
1535 | if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0) | |
1536 | { | |
1537 | var_setvalue (self, (char *)NULL); | |
1538 | return self; | |
1539 | } | |
1540 | ||
1541 | h = assoc_create (hashed_filenames->nbuckets); | |
1542 | for (i = 0; i < hashed_filenames->nbuckets; i++) | |
1543 | { | |
1544 | for (item = hash_items (i, hashed_filenames); item; item = item->next) | |
1545 | { | |
1546 | k = savestring (item->key); | |
1547 | v = pathdata(item)->path; | |
1548 | assoc_insert (h, k, v); | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | var_setvalue (self, (char *)h); | |
1553 | return self; | |
1554 | } | |
1555 | ||
1556 | static SHELL_VAR * | |
1557 | get_hashcmd (self) | |
1558 | SHELL_VAR *self; | |
1559 | { | |
1560 | build_hashcmd (self); | |
1561 | return (self); | |
1562 | } | |
1563 | ||
1564 | static SHELL_VAR * | |
1565 | assign_hashcmd (self, value, ind, key) | |
1566 | SHELL_VAR *self; | |
1567 | char *value; | |
1568 | arrayind_t ind; | |
1569 | char *key; | |
1570 | { | |
1571 | phash_insert (key, value, 0, 0); | |
1572 | return (build_hashcmd (self)); | |
1573 | } | |
1574 | ||
2c471a92 | 1575 | #if defined (ALIAS) |
fdf670ea CR |
1576 | static SHELL_VAR * |
1577 | build_aliasvar (self) | |
1578 | SHELL_VAR *self; | |
1579 | { | |
1580 | HASH_TABLE *h; | |
1581 | int i; | |
1582 | char *k, *v; | |
1583 | BUCKET_CONTENTS *item; | |
1584 | ||
1585 | h = assoc_cell (self); | |
1586 | if (h) | |
1587 | assoc_dispose (h); | |
1588 | ||
1589 | if (aliases == 0 || HASH_ENTRIES (aliases) == 0) | |
1590 | { | |
1591 | var_setvalue (self, (char *)NULL); | |
1592 | return self; | |
1593 | } | |
1594 | ||
1595 | h = assoc_create (aliases->nbuckets); | |
1596 | for (i = 0; i < aliases->nbuckets; i++) | |
1597 | { | |
1598 | for (item = hash_items (i, aliases); item; item = item->next) | |
1599 | { | |
1600 | k = savestring (item->key); | |
1601 | v = ((alias_t *)(item->data))->value; | |
1602 | assoc_insert (h, k, v); | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | var_setvalue (self, (char *)h); | |
1607 | return self; | |
1608 | } | |
1609 | ||
1610 | static SHELL_VAR * | |
1611 | get_aliasvar (self) | |
1612 | SHELL_VAR *self; | |
1613 | { | |
1614 | build_aliasvar (self); | |
1615 | return (self); | |
1616 | } | |
1617 | ||
1618 | static SHELL_VAR * | |
1619 | assign_aliasvar (self, value, ind, key) | |
1620 | SHELL_VAR *self; | |
1621 | char *value; | |
1622 | arrayind_t ind; | |
1623 | char *key; | |
1624 | { | |
1625 | add_alias (key, value); | |
1626 | return (build_aliasvar (self)); | |
1627 | } | |
2c471a92 CR |
1628 | #endif /* ALIAS */ |
1629 | ||
d166f048 | 1630 | #endif /* ARRAY_VARS */ |
bb70624e | 1631 | |
d3a24ed2 CR |
1632 | /* If ARRAY_VARS is not defined, this just returns the name of any |
1633 | currently-executing function. If we have arrays, it's a call stack. */ | |
bb70624e JA |
1634 | static SHELL_VAR * |
1635 | get_funcname (self) | |
1636 | SHELL_VAR *self; | |
1637 | { | |
d3a24ed2 | 1638 | #if ! defined (ARRAY_VARS) |
7117c2d2 | 1639 | char *t; |
bb70624e JA |
1640 | if (variable_context && this_shell_function) |
1641 | { | |
7117c2d2 JA |
1642 | FREE (value_cell (self)); |
1643 | t = savestring (this_shell_function->name); | |
1644 | var_setvalue (self, t); | |
bb70624e | 1645 | } |
d3a24ed2 | 1646 | #endif |
bb70624e JA |
1647 | return (self); |
1648 | } | |
1649 | ||
1650 | void | |
1651 | make_funcname_visible (on_or_off) | |
1652 | int on_or_off; | |
726f6388 JA |
1653 | { |
1654 | SHELL_VAR *v; | |
1655 | ||
bb70624e JA |
1656 | v = find_variable ("FUNCNAME"); |
1657 | if (v == 0 || v->dynamic_value == 0) | |
1658 | return; | |
1659 | ||
1660 | if (on_or_off) | |
1661 | VUNSETATTR (v, att_invisible); | |
1662 | else | |
1663 | VSETATTR (v, att_invisible); | |
1664 | } | |
1665 | ||
f73dda09 JA |
1666 | static SHELL_VAR * |
1667 | init_funcname_var () | |
1668 | { | |
1669 | SHELL_VAR *v; | |
bb70624e | 1670 | |
f73dda09 JA |
1671 | v = find_variable ("FUNCNAME"); |
1672 | if (v) | |
1673 | return v; | |
d3a24ed2 CR |
1674 | #if defined (ARRAY_VARS) |
1675 | INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign); | |
1676 | #else | |
f73dda09 | 1677 | INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign); |
d3a24ed2 | 1678 | #endif |
f73dda09 JA |
1679 | VSETATTR (v, att_invisible|att_noassign); |
1680 | return v; | |
1681 | } | |
726f6388 | 1682 | |
bb70624e JA |
1683 | static void |
1684 | initialize_dynamic_variables () | |
1685 | { | |
1686 | SHELL_VAR *v; | |
726f6388 | 1687 | |
f73dda09 JA |
1688 | v = init_seconds_var (); |
1689 | ||
d3a24ed2 CR |
1690 | INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL); |
1691 | INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell); | |
1692 | ||
bb70624e | 1693 | INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random); |
6e70dbff | 1694 | VSETATTR (v, att_integer); |
bb70624e | 1695 | INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno); |
6e70dbff | 1696 | VSETATTR (v, att_integer); |
726f6388 | 1697 | |
d3ad40de CR |
1698 | INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign); |
1699 | VSETATTR (v, att_integer|att_readonly); | |
1700 | ||
726f6388 | 1701 | #if defined (HISTORY) |
7117c2d2 | 1702 | INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL); |
6e70dbff | 1703 | VSETATTR (v, att_integer); |
726f6388 | 1704 | #endif |
ccc6cda3 | 1705 | |
d3a24ed2 CR |
1706 | #if defined (READLINE) |
1707 | INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks); | |
1708 | #endif | |
1709 | ||
ccc6cda3 | 1710 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
d3a24ed2 | 1711 | v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0); |
ccc6cda3 | 1712 | #endif /* PUSHD_AND_POPD && ARRAY_VARS */ |
d166f048 JA |
1713 | |
1714 | #if defined (ARRAY_VARS) | |
d3a24ed2 CR |
1715 | v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign); |
1716 | ||
1717 | # if defined (DEBUGGER) | |
b66cc816 CR |
1718 | v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset); |
1719 | v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset); | |
d3a24ed2 | 1720 | # endif /* DEBUGGER */ |
b66cc816 CR |
1721 | v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset); |
1722 | v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset); | |
fdf670ea CR |
1723 | |
1724 | v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree); | |
2c471a92 | 1725 | # if defined (ALIAS) |
fdf670ea | 1726 | v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree); |
2c471a92 | 1727 | # endif |
d166f048 | 1728 | #endif |
bb70624e | 1729 | |
f73dda09 | 1730 | v = init_funcname_var (); |
726f6388 JA |
1731 | } |
1732 | ||
7117c2d2 JA |
1733 | /* **************************************************************** */ |
1734 | /* */ | |
1735 | /* Retrieving variables and values */ | |
1736 | /* */ | |
1737 | /* **************************************************************** */ | |
1738 | ||
726f6388 JA |
1739 | /* How to get a pointer to the shell variable or function named NAME. |
1740 | HASHED_VARS is a pointer to the hash table containing the list | |
1741 | of interest (either variables or functions). */ | |
7117c2d2 JA |
1742 | |
1743 | static SHELL_VAR * | |
1744 | hash_lookup (name, hashed_vars) | |
f73dda09 | 1745 | const char *name; |
726f6388 JA |
1746 | HASH_TABLE *hashed_vars; |
1747 | { | |
1748 | BUCKET_CONTENTS *bucket; | |
1749 | ||
7117c2d2 | 1750 | bucket = hash_search (name, hashed_vars, 0); |
ccc6cda3 | 1751 | return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL); |
726f6388 JA |
1752 | } |
1753 | ||
7117c2d2 JA |
1754 | SHELL_VAR * |
1755 | var_lookup (name, vcontext) | |
1756 | const char *name; | |
1757 | VAR_CONTEXT *vcontext; | |
1758 | { | |
1759 | VAR_CONTEXT *vc; | |
1760 | SHELL_VAR *v; | |
1761 | ||
1762 | v = (SHELL_VAR *)NULL; | |
1763 | for (vc = vcontext; vc; vc = vc->down) | |
1764 | if (v = hash_lookup (name, vc->table)) | |
1765 | break; | |
1766 | ||
1767 | return v; | |
1768 | } | |
1769 | ||
726f6388 | 1770 | /* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero, |
7117c2d2 JA |
1771 | then also search the temporarily built list of exported variables. |
1772 | The lookup order is: | |
1773 | temporary_env | |
fdf670ea | 1774 | shell_variables list |
7117c2d2 JA |
1775 | */ |
1776 | ||
726f6388 | 1777 | SHELL_VAR * |
d3a24ed2 | 1778 | find_variable_internal (name, force_tempenv) |
f73dda09 | 1779 | const char *name; |
d3a24ed2 | 1780 | int force_tempenv; |
726f6388 | 1781 | { |
28ef6c31 | 1782 | SHELL_VAR *var; |
d3a24ed2 | 1783 | int search_tempenv; |
28ef6c31 JA |
1784 | |
1785 | var = (SHELL_VAR *)NULL; | |
726f6388 JA |
1786 | |
1787 | /* If explicitly requested, first look in the temporary environment for | |
1788 | the variable. This allows constructs such as "foo=x eval 'echo $foo'" | |
1789 | to get the `exported' value of $foo. This happens if we are executing | |
1790 | a function or builtin, or if we are looking up a variable in a | |
1791 | "subshell environment". */ | |
d3a24ed2 CR |
1792 | search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment); |
1793 | ||
1794 | if (search_tempenv && temporary_env) | |
7117c2d2 | 1795 | var = hash_lookup (name, temporary_env); |
726f6388 | 1796 | |
7117c2d2 | 1797 | if (var == 0) |
726f6388 JA |
1798 | var = var_lookup (name, shell_variables); |
1799 | ||
7117c2d2 | 1800 | if (var == 0) |
726f6388 JA |
1801 | return ((SHELL_VAR *)NULL); |
1802 | ||
ccc6cda3 | 1803 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); |
726f6388 JA |
1804 | } |
1805 | ||
6faad625 CR |
1806 | SHELL_VAR * |
1807 | find_global_variable (name) | |
1808 | const char *name; | |
1809 | { | |
1810 | SHELL_VAR *var; | |
1811 | ||
1812 | var = var_lookup (name, global_variables); | |
1813 | ||
1814 | if (var == 0) | |
1815 | return ((SHELL_VAR *)NULL); | |
1816 | ||
1817 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
1818 | } | |
1819 | ||
726f6388 JA |
1820 | /* Look up the variable entry named NAME. Returns the entry or NULL. */ |
1821 | SHELL_VAR * | |
1822 | find_variable (name) | |
f73dda09 | 1823 | const char *name; |
726f6388 | 1824 | { |
d7f49990 | 1825 | return (find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)))); |
726f6388 JA |
1826 | } |
1827 | ||
1828 | /* Look up the function entry whose name matches STRING. | |
1829 | Returns the entry or NULL. */ | |
1830 | SHELL_VAR * | |
1831 | find_function (name) | |
f73dda09 | 1832 | const char *name; |
726f6388 | 1833 | { |
7117c2d2 JA |
1834 | return (hash_lookup (name, shell_functions)); |
1835 | } | |
1836 | ||
d3a24ed2 CR |
1837 | /* Find the function definition for the shell function named NAME. Returns |
1838 | the entry or NULL. */ | |
1839 | FUNCTION_DEF * | |
1840 | find_function_def (name) | |
1841 | const char *name; | |
1842 | { | |
b0c16657 | 1843 | #if defined (DEBUGGER) |
d3a24ed2 | 1844 | return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs)); |
b0c16657 CR |
1845 | #else |
1846 | return ((FUNCTION_DEF *)0); | |
1847 | #endif | |
d3a24ed2 CR |
1848 | } |
1849 | ||
7117c2d2 JA |
1850 | /* Return the value of VAR. VAR is assumed to have been the result of a |
1851 | lookup without any subscript, if arrays are compiled into the shell. */ | |
1852 | char * | |
1853 | get_variable_value (var) | |
1854 | SHELL_VAR *var; | |
1855 | { | |
1856 | if (var == 0) | |
1857 | return ((char *)NULL); | |
1858 | #if defined (ARRAY_VARS) | |
1859 | else if (array_p (var)) | |
1860 | return (array_reference (array_cell (var), 0)); | |
fdf670ea CR |
1861 | else if (assoc_p (var)) |
1862 | return (assoc_reference (assoc_cell (var), "0")); | |
7117c2d2 JA |
1863 | #endif |
1864 | else | |
1865 | return (value_cell (var)); | |
726f6388 JA |
1866 | } |
1867 | ||
1868 | /* Return the string value of a variable. Return NULL if the variable | |
7117c2d2 JA |
1869 | doesn't exist. Don't cons a new string. This is a potential memory |
1870 | leak if the variable is found in the temporary environment. Since | |
1871 | functions and variables have separate name spaces, returns NULL if | |
1872 | var_name is a shell function only. */ | |
726f6388 JA |
1873 | char * |
1874 | get_string_value (var_name) | |
28ef6c31 | 1875 | const char *var_name; |
726f6388 | 1876 | { |
d166f048 JA |
1877 | SHELL_VAR *var; |
1878 | ||
f73dda09 | 1879 | var = find_variable (var_name); |
7117c2d2 | 1880 | return ((var) ? get_variable_value (var) : (char *)NULL); |
726f6388 JA |
1881 | } |
1882 | ||
b72432fd JA |
1883 | /* This is present for use by the tilde and readline libraries. */ |
1884 | char * | |
28ef6c31 JA |
1885 | sh_get_env_value (v) |
1886 | const char *v; | |
b72432fd JA |
1887 | { |
1888 | return get_string_value (v); | |
1889 | } | |
1890 | ||
7117c2d2 JA |
1891 | /* **************************************************************** */ |
1892 | /* */ | |
1893 | /* Creating and setting variables */ | |
1894 | /* */ | |
1895 | /* **************************************************************** */ | |
1896 | ||
1897 | /* Set NAME to VALUE if NAME has no value. */ | |
1898 | SHELL_VAR * | |
1899 | set_if_not (name, value) | |
1900 | char *name, *value; | |
1901 | { | |
1902 | SHELL_VAR *v; | |
1903 | ||
d3ad40de CR |
1904 | if (shell_variables == 0) |
1905 | create_variable_tables (); | |
1906 | ||
7117c2d2 JA |
1907 | v = find_variable (name); |
1908 | if (v == 0) | |
d11b8b46 | 1909 | v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0); |
7117c2d2 JA |
1910 | return (v); |
1911 | } | |
1912 | ||
726f6388 JA |
1913 | /* Create a local variable referenced by NAME. */ |
1914 | SHELL_VAR * | |
1915 | make_local_variable (name) | |
f73dda09 | 1916 | const char *name; |
726f6388 JA |
1917 | { |
1918 | SHELL_VAR *new_var, *old_var; | |
7117c2d2 JA |
1919 | VAR_CONTEXT *vc; |
1920 | int was_tmpvar; | |
1921 | char *tmp_value; | |
726f6388 JA |
1922 | |
1923 | /* local foo; local foo; is a no-op. */ | |
1924 | old_var = find_variable (name); | |
7117c2d2 | 1925 | if (old_var && local_p (old_var) && old_var->context == variable_context) |
8ed8525c CR |
1926 | { |
1927 | VUNSETATTR (old_var, att_invisible); | |
1928 | return (old_var); | |
1929 | } | |
726f6388 | 1930 | |
7117c2d2 JA |
1931 | was_tmpvar = old_var && tempvar_p (old_var); |
1932 | if (was_tmpvar) | |
1933 | tmp_value = value_cell (old_var); | |
1934 | ||
1935 | for (vc = shell_variables; vc; vc = vc->down) | |
1936 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
1937 | break; | |
1938 | ||
1939 | if (vc == 0) | |
1940 | { | |
5e13499c | 1941 | internal_error (_("make_local_variable: no function context at current scope")); |
7117c2d2 JA |
1942 | return ((SHELL_VAR *)NULL); |
1943 | } | |
1944 | else if (vc->table == 0) | |
1945 | vc->table = hash_create (TEMPENV_HASH_BUCKETS); | |
1946 | ||
bb70624e JA |
1947 | /* Since this is called only from the local/declare/typeset code, we can |
1948 | call builtin_error here without worry (of course, it will also work | |
28ef6c31 JA |
1949 | for anything that sets this_command_name). Variables with the `noassign' |
1950 | attribute may not be made local. The test against old_var's context | |
1951 | level is to disallow local copies of readonly global variables (since I | |
1952 | believe that this could be a security hole). Readonly copies of calling | |
1953 | function local variables are OK. */ | |
1954 | if (old_var && (noassign_p (old_var) || | |
1955 | (readonly_p (old_var) && old_var->context == 0))) | |
1956 | { | |
1957 | if (readonly_p (old_var)) | |
7117c2d2 | 1958 | sh_readonly (name); |
bb70624e JA |
1959 | return ((SHELL_VAR *)NULL); |
1960 | } | |
1961 | ||
d166f048 | 1962 | if (old_var == 0) |
14e8b2a7 | 1963 | new_var = make_new_variable (name, vc->table); |
726f6388 JA |
1964 | else |
1965 | { | |
7117c2d2 | 1966 | new_var = make_new_variable (name, vc->table); |
726f6388 | 1967 | |
7117c2d2 JA |
1968 | /* If we found this variable in one of the temporary environments, |
1969 | inherit its value. Watch to see if this causes problems with | |
1970 | things like `x=4 local x'. */ | |
1971 | if (was_tmpvar) | |
fdf670ea | 1972 | var_setvalue (new_var, savestring (tmp_value)); |
726f6388 | 1973 | |
ccc6cda3 | 1974 | new_var->attributes = exported_p (old_var) ? att_exported : 0; |
726f6388 JA |
1975 | } |
1976 | ||
7117c2d2 JA |
1977 | vc->flags |= VC_HASLOCAL; |
1978 | ||
726f6388 | 1979 | new_var->context = variable_context; |
bb70624e | 1980 | VSETATTR (new_var, att_local); |
726f6388 | 1981 | |
7117c2d2 JA |
1982 | if (ifsname (name)) |
1983 | setifs (new_var); | |
726f6388 JA |
1984 | |
1985 | return (new_var); | |
1986 | } | |
1987 | ||
7117c2d2 | 1988 | /* Create a new shell variable with name NAME. */ |
f73dda09 | 1989 | static SHELL_VAR * |
7117c2d2 | 1990 | new_shell_variable (name) |
f73dda09 | 1991 | const char *name; |
726f6388 | 1992 | { |
ccc6cda3 | 1993 | SHELL_VAR *entry; |
726f6388 | 1994 | |
ccc6cda3 | 1995 | entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); |
726f6388 | 1996 | |
ccc6cda3 | 1997 | entry->name = savestring (name); |
7117c2d2 | 1998 | var_setvalue (entry, (char *)NULL); |
bb70624e | 1999 | CLEAR_EXPORTSTR (entry); |
726f6388 | 2000 | |
7117c2d2 JA |
2001 | entry->dynamic_value = (sh_var_value_func_t *)NULL; |
2002 | entry->assign_func = (sh_var_assign_func_t *)NULL; | |
2003 | ||
2004 | entry->attributes = 0; | |
ccc6cda3 JA |
2005 | |
2006 | /* Always assume variables are to be made at toplevel! | |
2007 | make_local_variable has the responsibilty of changing the | |
2008 | variable context. */ | |
2009 | entry->context = 0; | |
7117c2d2 JA |
2010 | |
2011 | return (entry); | |
2012 | } | |
2013 | ||
2014 | /* Create a new shell variable with name NAME and add it to the hash table | |
2015 | TABLE. */ | |
2016 | static SHELL_VAR * | |
2017 | make_new_variable (name, table) | |
2018 | const char *name; | |
2019 | HASH_TABLE *table; | |
2020 | { | |
2021 | SHELL_VAR *entry; | |
2022 | BUCKET_CONTENTS *elt; | |
2023 | ||
2024 | entry = new_shell_variable (name); | |
ccc6cda3 | 2025 | |
28ef6c31 JA |
2026 | /* Make sure we have a shell_variables hash table to add to. */ |
2027 | if (shell_variables == 0) | |
d3ad40de | 2028 | create_variable_tables (); |
28ef6c31 | 2029 | |
7117c2d2 JA |
2030 | elt = hash_insert (savestring (name), table, HASH_NOSRCH); |
2031 | elt->data = (PTR_T)entry; | |
ccc6cda3 JA |
2032 | |
2033 | return entry; | |
2034 | } | |
2035 | ||
2036 | #if defined (ARRAY_VARS) | |
2037 | SHELL_VAR * | |
2038 | make_new_array_variable (name) | |
2039 | char *name; | |
2040 | { | |
2041 | SHELL_VAR *entry; | |
2042 | ARRAY *array; | |
2043 | ||
7117c2d2 JA |
2044 | entry = make_new_variable (name, global_variables->table); |
2045 | array = array_create (); | |
fdf670ea | 2046 | |
7117c2d2 | 2047 | var_setarray (entry, array); |
bb70624e | 2048 | VSETATTR (entry, att_array); |
ccc6cda3 JA |
2049 | return entry; |
2050 | } | |
fdf670ea CR |
2051 | |
2052 | SHELL_VAR * | |
7f947b68 | 2053 | make_local_array_variable (name, assoc_ok) |
fdf670ea | 2054 | char *name; |
7f947b68 | 2055 | int assoc_ok; |
fdf670ea CR |
2056 | { |
2057 | SHELL_VAR *var; | |
2058 | ARRAY *array; | |
2059 | ||
2060 | var = make_local_variable (name); | |
7f947b68 | 2061 | if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var))) |
fdf670ea CR |
2062 | return var; |
2063 | ||
2064 | array = array_create (); | |
2065 | ||
2066 | dispose_variable_value (var); | |
2067 | var_setarray (var, array); | |
2068 | VSETATTR (var, att_array); | |
2069 | return var; | |
2070 | } | |
2071 | ||
2072 | SHELL_VAR * | |
2073 | make_new_assoc_variable (name) | |
2074 | char *name; | |
2075 | { | |
2076 | SHELL_VAR *entry; | |
2077 | HASH_TABLE *hash; | |
2078 | ||
2079 | entry = make_new_variable (name, global_variables->table); | |
2080 | hash = assoc_create (0); | |
2081 | ||
2082 | var_setassoc (entry, hash); | |
2083 | VSETATTR (entry, att_assoc); | |
2084 | return entry; | |
2085 | } | |
2086 | ||
2087 | SHELL_VAR * | |
2088 | make_local_assoc_variable (name) | |
2089 | char *name; | |
2090 | { | |
2091 | SHELL_VAR *var; | |
2092 | HASH_TABLE *hash; | |
2093 | ||
2094 | var = make_local_variable (name); | |
2095 | if (var == 0 || assoc_p (var)) | |
2096 | return var; | |
2097 | ||
2098 | dispose_variable_value (var); | |
2099 | hash = assoc_create (0); | |
2100 | ||
2101 | var_setassoc (var, hash); | |
2102 | VSETATTR (var, att_assoc); | |
2103 | return var; | |
2104 | } | |
ccc6cda3 JA |
2105 | #endif |
2106 | ||
2107 | char * | |
d11b8b46 | 2108 | make_variable_value (var, value, flags) |
ccc6cda3 JA |
2109 | SHELL_VAR *var; |
2110 | char *value; | |
d11b8b46 | 2111 | int flags; |
ccc6cda3 | 2112 | { |
d11b8b46 CR |
2113 | char *retval, *oval; |
2114 | intmax_t lval, rval; | |
fdf670ea | 2115 | int expok, olen, op; |
ccc6cda3 JA |
2116 | |
2117 | /* If this variable has had its type set to integer (via `declare -i'), | |
2118 | then do expression evaluation on it and store the result. The | |
7117c2d2 | 2119 | functions in expr.c (evalexp()) and bind_int_variable() are responsible |
ccc6cda3 JA |
2120 | for turning off the integer flag if they don't want further |
2121 | evaluation done. */ | |
2122 | if (integer_p (var)) | |
2123 | { | |
d11b8b46 CR |
2124 | if (flags & ASS_APPEND) |
2125 | { | |
2126 | oval = value_cell (var); | |
2127 | lval = evalexp (oval, &expok); /* ksh93 seems to do this */ | |
2128 | if (expok == 0) | |
c184f645 CR |
2129 | { |
2130 | top_level_cleanup (); | |
2131 | jump_to_top_level (DISCARD); | |
2132 | } | |
d11b8b46 CR |
2133 | } |
2134 | rval = evalexp (value, &expok); | |
d166f048 | 2135 | if (expok == 0) |
aea33a6b CR |
2136 | { |
2137 | top_level_cleanup (); | |
c184f645 | 2138 | jump_to_top_level (DISCARD); |
aea33a6b | 2139 | } |
d11b8b46 CR |
2140 | if (flags & ASS_APPEND) |
2141 | rval += lval; | |
2142 | retval = itos (rval); | |
ccc6cda3 | 2143 | } |
fdf670ea CR |
2144 | #if defined (CASEMOD_ATTRS) |
2145 | else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var)) | |
2146 | { | |
2147 | if (flags & ASS_APPEND) | |
2148 | { | |
2149 | oval = get_variable_value (var); | |
2150 | if (oval == 0) /* paranoia */ | |
2151 | oval = ""; | |
2152 | olen = STRLEN (oval); | |
2153 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2154 | strcpy (retval, oval); | |
2155 | if (value) | |
2156 | strcpy (retval+olen, value); | |
2157 | } | |
fdf670ea CR |
2158 | else if (*value) |
2159 | retval = savestring (value); | |
2160 | else | |
2161 | { | |
2162 | retval = (char *)xmalloc (1); | |
2163 | retval[0] = '\0'; | |
2164 | } | |
2165 | op = capcase_p (var) ? CASE_CAPITALIZE | |
2166 | : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER); | |
2167 | oval = sh_modcase (retval, (char *)0, op); | |
2168 | free (retval); | |
2169 | retval = oval; | |
2170 | } | |
09767ff0 | 2171 | #endif /* CASEMOD_ATTRS */ |
ccc6cda3 JA |
2172 | else if (value) |
2173 | { | |
d11b8b46 CR |
2174 | if (flags & ASS_APPEND) |
2175 | { | |
f5635ecd | 2176 | oval = get_variable_value (var); |
d11b8b46 CR |
2177 | if (oval == 0) /* paranoia */ |
2178 | oval = ""; | |
2179 | olen = STRLEN (oval); | |
2180 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2181 | strcpy (retval, oval); | |
2182 | if (value) | |
2183 | strcpy (retval+olen, value); | |
2184 | } | |
2185 | else if (*value) | |
ccc6cda3 JA |
2186 | retval = savestring (value); |
2187 | else | |
726f6388 | 2188 | { |
f73dda09 | 2189 | retval = (char *)xmalloc (1); |
ccc6cda3 | 2190 | retval[0] = '\0'; |
726f6388 | 2191 | } |
ccc6cda3 JA |
2192 | } |
2193 | else | |
2194 | retval = (char *)NULL; | |
726f6388 | 2195 | |
ccc6cda3 JA |
2196 | return retval; |
2197 | } | |
726f6388 | 2198 | |
7117c2d2 JA |
2199 | /* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the |
2200 | temporary environment (but usually is not). */ | |
2201 | static SHELL_VAR * | |
d11b8b46 | 2202 | bind_variable_internal (name, value, table, hflags, aflags) |
f73dda09 JA |
2203 | const char *name; |
2204 | char *value; | |
7117c2d2 | 2205 | HASH_TABLE *table; |
d11b8b46 | 2206 | int hflags, aflags; |
ccc6cda3 JA |
2207 | { |
2208 | char *newval; | |
7117c2d2 | 2209 | SHELL_VAR *entry; |
28ef6c31 | 2210 | |
7117c2d2 | 2211 | entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table); |
ccc6cda3 JA |
2212 | |
2213 | if (entry == 0) | |
2214 | { | |
7117c2d2 | 2215 | entry = make_new_variable (name, table); |
d11b8b46 | 2216 | var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */ |
726f6388 | 2217 | } |
28ef6c31 | 2218 | else if (entry->assign_func) /* array vars have assign functions now */ |
bb70624e JA |
2219 | { |
2220 | INVALIDATE_EXPORTSTR (entry); | |
6e70dbff | 2221 | newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value; |
2695f55d CR |
2222 | if (assoc_p (entry)) |
2223 | entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0")); | |
2224 | else if (array_p (entry)) | |
2225 | entry = (*(entry->assign_func)) (entry, newval, 0, 0); | |
2226 | else | |
2227 | entry = (*(entry->assign_func)) (entry, newval, -1, 0); | |
6e70dbff | 2228 | if (newval != value) |
fdf670ea | 2229 | free (newval); |
6e70dbff | 2230 | return (entry); |
bb70624e | 2231 | } |
726f6388 JA |
2232 | else |
2233 | { | |
28ef6c31 | 2234 | if (readonly_p (entry) || noassign_p (entry)) |
726f6388 | 2235 | { |
28ef6c31 | 2236 | if (readonly_p (entry)) |
7117c2d2 | 2237 | err_readonly (name); |
726f6388 JA |
2238 | return (entry); |
2239 | } | |
2240 | ||
2241 | /* Variables which are bound are visible. */ | |
bb70624e | 2242 | VUNSETATTR (entry, att_invisible); |
726f6388 | 2243 | |
861a1900 CR |
2244 | #if defined (ARRAY_VARS) |
2245 | if (assoc_p (entry) || array_p (entry)) | |
2246 | newval = make_array_variable_value (entry, 0, "0", value, aflags); | |
2247 | else | |
2248 | #endif | |
2249 | ||
d11b8b46 | 2250 | newval = make_variable_value (entry, value, aflags); /* XXX */ |
726f6388 | 2251 | |
bb70624e JA |
2252 | /* Invalidate any cached export string */ |
2253 | INVALIDATE_EXPORTSTR (entry); | |
2254 | ||
ccc6cda3 JA |
2255 | #if defined (ARRAY_VARS) |
2256 | /* XXX -- this bears looking at again -- XXX */ | |
2257 | /* If an existing array variable x is being assigned to with x=b or | |
2258 | `read x' or something of that nature, silently convert it to | |
2259 | x[0]=b or `read x[0]'. */ | |
861a1900 | 2260 | if (assoc_p (entry)) |
d166f048 | 2261 | { |
861a1900 | 2262 | assoc_insert (assoc_cell (entry), savestring ("0"), newval); |
d166f048 JA |
2263 | free (newval); |
2264 | } | |
861a1900 | 2265 | else if (array_p (entry)) |
fdf670ea | 2266 | { |
861a1900 | 2267 | array_insert (array_cell (entry), 0, newval); |
fdf670ea CR |
2268 | free (newval); |
2269 | } | |
726f6388 | 2270 | else |
f73dda09 | 2271 | #endif |
726f6388 | 2272 | { |
7117c2d2 JA |
2273 | FREE (value_cell (entry)); |
2274 | var_setvalue (entry, newval); | |
726f6388 JA |
2275 | } |
2276 | } | |
2277 | ||
2278 | if (mark_modified_vars) | |
bb70624e | 2279 | VSETATTR (entry, att_exported); |
726f6388 JA |
2280 | |
2281 | if (exported_p (entry)) | |
2282 | array_needs_making = 1; | |
2283 | ||
2284 | return (entry); | |
2285 | } | |
7117c2d2 JA |
2286 | |
2287 | /* Bind a variable NAME to VALUE. This conses up the name | |
2288 | and value strings. If we have a temporary environment, we bind there | |
2289 | first, then we bind into shell_variables. */ | |
2290 | ||
2291 | SHELL_VAR * | |
d11b8b46 | 2292 | bind_variable (name, value, flags) |
7117c2d2 JA |
2293 | const char *name; |
2294 | char *value; | |
d11b8b46 | 2295 | int flags; |
7117c2d2 JA |
2296 | { |
2297 | SHELL_VAR *v; | |
2298 | VAR_CONTEXT *vc; | |
2299 | ||
2300 | if (shell_variables == 0) | |
d3ad40de | 2301 | create_variable_tables (); |
7117c2d2 JA |
2302 | |
2303 | /* If we have a temporary environment, look there first for the variable, | |
2304 | and, if found, modify the value there before modifying it in the | |
2305 | shell_variables table. This allows sourced scripts to modify values | |
2306 | given to them in a temporary environment while modifying the variable | |
2307 | value that the caller sees. */ | |
2308 | if (temporary_env) | |
2309 | bind_tempenv_variable (name, value); | |
2310 | ||
2311 | /* XXX -- handle local variables here. */ | |
2312 | for (vc = shell_variables; vc; vc = vc->down) | |
2313 | { | |
2314 | if (vc_isfuncenv (vc) || vc_isbltnenv (vc)) | |
fdf670ea CR |
2315 | { |
2316 | v = hash_lookup (name, vc->table); | |
2317 | if (v) | |
d11b8b46 | 2318 | return (bind_variable_internal (name, value, vc->table, 0, flags)); |
fdf670ea | 2319 | } |
7117c2d2 | 2320 | } |
d11b8b46 | 2321 | return (bind_variable_internal (name, value, global_variables->table, 0, flags)); |
7117c2d2 | 2322 | } |
726f6388 | 2323 | |
bb70624e JA |
2324 | /* Make VAR, a simple shell variable, have value VALUE. Once assigned a |
2325 | value, variables are no longer invisible. This is a duplicate of part | |
2326 | of the internals of bind_variable. If the variable is exported, or | |
2327 | all modified variables should be exported, mark the variable for export | |
2328 | and note that the export environment needs to be recreated. */ | |
2329 | SHELL_VAR * | |
d11b8b46 | 2330 | bind_variable_value (var, value, aflags) |
bb70624e JA |
2331 | SHELL_VAR *var; |
2332 | char *value; | |
d11b8b46 | 2333 | int aflags; |
bb70624e JA |
2334 | { |
2335 | char *t; | |
2336 | ||
2337 | VUNSETATTR (var, att_invisible); | |
2338 | ||
6e70dbff CR |
2339 | if (var->assign_func) |
2340 | { | |
2341 | /* If we're appending, we need the old value, so use | |
2342 | make_variable_value */ | |
2343 | t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value; | |
fdf670ea | 2344 | (*(var->assign_func)) (var, t, -1, 0); |
6e70dbff CR |
2345 | if (t != value && t) |
2346 | free (t); | |
2347 | } | |
2348 | else | |
2349 | { | |
2350 | t = make_variable_value (var, value, aflags); | |
2351 | FREE (value_cell (var)); | |
2352 | var_setvalue (var, t); | |
2353 | } | |
bb70624e JA |
2354 | |
2355 | INVALIDATE_EXPORTSTR (var); | |
2356 | ||
2357 | if (mark_modified_vars) | |
2358 | VSETATTR (var, att_exported); | |
2359 | ||
2360 | if (exported_p (var)) | |
2361 | array_needs_making = 1; | |
2362 | ||
2363 | return (var); | |
2364 | } | |
2365 | ||
2366 | /* Bind/create a shell variable with the name LHS to the RHS. | |
2367 | This creates or modifies a variable such that it is an integer. | |
2368 | ||
2369 | This used to be in expr.c, but it is here so that all of the | |
2370 | variable binding stuff is localized. Since we don't want any | |
2371 | recursive evaluation from bind_variable() (possible without this code, | |
2372 | since bind_variable() calls the evaluator for variables with the integer | |
2373 | attribute set), we temporarily turn off the integer attribute for each | |
2374 | variable we set here, then turn it back on after binding as necessary. */ | |
2375 | ||
2376 | SHELL_VAR * | |
2377 | bind_int_variable (lhs, rhs) | |
2378 | char *lhs, *rhs; | |
2379 | { | |
2380 | register SHELL_VAR *v; | |
7117c2d2 JA |
2381 | int isint, isarr; |
2382 | ||
2383 | isint = isarr = 0; | |
2384 | #if defined (ARRAY_VARS) | |
d3a24ed2 | 2385 | if (valid_array_reference (lhs)) |
7117c2d2 JA |
2386 | { |
2387 | isarr = 1; | |
2388 | v = array_variable_part (lhs, (char **)0, (int *)0); | |
2389 | } | |
2390 | else | |
2391 | #endif | |
2392 | v = find_variable (lhs); | |
bb70624e | 2393 | |
bb70624e JA |
2394 | if (v) |
2395 | { | |
2396 | isint = integer_p (v); | |
2397 | VUNSETATTR (v, att_integer); | |
2398 | } | |
2399 | ||
7117c2d2 JA |
2400 | #if defined (ARRAY_VARS) |
2401 | if (isarr) | |
d11b8b46 | 2402 | v = assign_array_element (lhs, rhs, 0); |
7117c2d2 JA |
2403 | else |
2404 | #endif | |
d11b8b46 | 2405 | v = bind_variable (lhs, rhs, 0); |
7117c2d2 | 2406 | |
5f8cde23 | 2407 | if (v && isint) |
bb70624e JA |
2408 | VSETATTR (v, att_integer); |
2409 | ||
2410 | return (v); | |
2411 | } | |
2412 | ||
ccc6cda3 | 2413 | SHELL_VAR * |
f73dda09 JA |
2414 | bind_var_to_int (var, val) |
2415 | char *var; | |
7117c2d2 | 2416 | intmax_t val; |
ccc6cda3 | 2417 | { |
7117c2d2 | 2418 | char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p; |
ccc6cda3 | 2419 | |
f73dda09 JA |
2420 | p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0); |
2421 | return (bind_int_variable (var, p)); | |
ccc6cda3 JA |
2422 | } |
2423 | ||
7117c2d2 JA |
2424 | /* Do a function binding to a variable. You pass the name and |
2425 | the command to bind to. This conses the name and command. */ | |
2426 | SHELL_VAR * | |
2427 | bind_function (name, value) | |
2428 | const char *name; | |
2429 | COMMAND *value; | |
2430 | { | |
2431 | SHELL_VAR *entry; | |
2432 | ||
2433 | entry = find_function (name); | |
2434 | if (entry == 0) | |
2435 | { | |
2436 | BUCKET_CONTENTS *elt; | |
2437 | ||
2438 | elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH); | |
2439 | entry = new_shell_variable (name); | |
2440 | elt->data = (PTR_T)entry; | |
2441 | } | |
2442 | else | |
2443 | INVALIDATE_EXPORTSTR (entry); | |
2444 | ||
2445 | if (var_isset (entry)) | |
2446 | dispose_command (function_cell (entry)); | |
2447 | ||
2448 | if (value) | |
2449 | var_setfunc (entry, copy_command (value)); | |
2450 | else | |
2451 | var_setfunc (entry, 0); | |
2452 | ||
2453 | VSETATTR (entry, att_function); | |
2454 | ||
2455 | if (mark_modified_vars) | |
2456 | VSETATTR (entry, att_exported); | |
2457 | ||
2458 | VUNSETATTR (entry, att_invisible); /* Just to be sure */ | |
2459 | ||
2460 | if (exported_p (entry)) | |
2461 | array_needs_making = 1; | |
2462 | ||
2463 | #if defined (PROGRAMMABLE_COMPLETION) | |
2464 | set_itemlist_dirty (&it_functions); | |
2465 | #endif | |
2466 | ||
2467 | return (entry); | |
2468 | } | |
2469 | ||
b0c16657 | 2470 | #if defined (DEBUGGER) |
d3a24ed2 CR |
2471 | /* Bind a function definition, which includes source file and line number |
2472 | information in addition to the command, into the FUNCTION_DEF hash table.*/ | |
2473 | void | |
2474 | bind_function_def (name, value) | |
2475 | const char *name; | |
2476 | FUNCTION_DEF *value; | |
2477 | { | |
2478 | FUNCTION_DEF *entry; | |
2479 | BUCKET_CONTENTS *elt; | |
5e13499c | 2480 | COMMAND *cmd; |
d3a24ed2 CR |
2481 | |
2482 | entry = find_function_def (name); | |
2483 | if (entry) | |
2484 | { | |
2485 | dispose_function_def_contents (entry); | |
2486 | entry = copy_function_def_contents (value, entry); | |
2487 | } | |
2488 | else | |
2489 | { | |
5e13499c CR |
2490 | cmd = value->command; |
2491 | value->command = 0; | |
d3a24ed2 | 2492 | entry = copy_function_def (value); |
5e13499c | 2493 | value->command = cmd; |
d3a24ed2 CR |
2494 | |
2495 | elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH); | |
2496 | elt->data = (PTR_T *)entry; | |
2497 | } | |
2498 | } | |
b0c16657 | 2499 | #endif /* DEBUGGER */ |
d3a24ed2 | 2500 | |
7117c2d2 JA |
2501 | /* Add STRING, which is of the form foo=bar, to the temporary environment |
2502 | HASH_TABLE (temporary_env). The functions in execute_cmd.c are | |
2503 | responsible for moving the main temporary env to one of the other | |
2504 | temporary environments. The expansion code in subst.c calls this. */ | |
2505 | int | |
adc6cff5 | 2506 | assign_in_env (word, flags) |
43df7bbb | 2507 | WORD_DESC *word; |
adc6cff5 | 2508 | int flags; |
7117c2d2 JA |
2509 | { |
2510 | int offset; | |
2511 | char *name, *temp, *value; | |
2512 | SHELL_VAR *var; | |
43df7bbb CR |
2513 | const char *string; |
2514 | ||
2515 | string = word->word; | |
7117c2d2 | 2516 | |
5e13499c | 2517 | offset = assignment (string, 0); |
7117c2d2 JA |
2518 | name = savestring (string); |
2519 | value = (char *)NULL; | |
2520 | ||
2521 | if (name[offset] == '=') | |
2522 | { | |
2523 | name[offset] = 0; | |
2524 | ||
d11b8b46 CR |
2525 | /* ignore the `+' when assigning temporary environment */ |
2526 | if (name[offset - 1] == '+') | |
2527 | name[offset - 1] = '\0'; | |
2528 | ||
7117c2d2 JA |
2529 | var = find_variable (name); |
2530 | if (var && (readonly_p (var) || noassign_p (var))) | |
2531 | { | |
2532 | if (readonly_p (var)) | |
2533 | err_readonly (name); | |
2534 | free (name); | |
2535 | return (0); | |
2536 | } | |
2537 | ||
2538 | temp = name + offset + 1; | |
43df7bbb | 2539 | value = expand_assignment_string_to_string (temp, 0); |
7117c2d2 JA |
2540 | } |
2541 | ||
2542 | if (temporary_env == 0) | |
2543 | temporary_env = hash_create (TEMPENV_HASH_BUCKETS); | |
2544 | ||
2545 | var = hash_lookup (name, temporary_env); | |
2546 | if (var == 0) | |
2547 | var = make_new_variable (name, temporary_env); | |
2548 | else | |
2549 | FREE (value_cell (var)); | |
2550 | ||
2551 | if (value == 0) | |
2552 | { | |
2553 | value = (char *)xmalloc (1); /* like do_assignment_internal */ | |
2554 | value[0] = '\0'; | |
2555 | } | |
2556 | ||
2557 | var_setvalue (var, value); | |
2558 | var->attributes |= (att_exported|att_tempvar); | |
2559 | var->context = variable_context; /* XXX */ | |
2560 | ||
2561 | INVALIDATE_EXPORTSTR (var); | |
2562 | var->exportstr = mk_env_string (name, value); | |
2563 | ||
2564 | array_needs_making = 1; | |
2565 | ||
adc6cff5 | 2566 | #if 0 |
7117c2d2 JA |
2567 | if (ifsname (name)) |
2568 | setifs (var); | |
adc6cff5 CR |
2569 | else |
2570 | #endif | |
2571 | if (flags) | |
2572 | stupidly_hack_special_variables (name); | |
7117c2d2 JA |
2573 | |
2574 | if (echo_command_at_execute) | |
1d7ecd77 CR |
2575 | /* The Korn shell prints the `+ ' in front of assignment statements, |
2576 | so we do too. */ | |
2577 | xtrace_print_assignment (name, value, 0, 1); | |
7117c2d2 | 2578 | |
5e13499c | 2579 | free (name); |
7117c2d2 JA |
2580 | return 1; |
2581 | } | |
2582 | ||
2583 | /* **************************************************************** */ | |
2584 | /* */ | |
2585 | /* Copying variables */ | |
2586 | /* */ | |
2587 | /* **************************************************************** */ | |
2588 | ||
2589 | #ifdef INCLUDE_UNUSED | |
2590 | /* Copy VAR to a new data structure and return that structure. */ | |
2591 | SHELL_VAR * | |
2592 | copy_variable (var) | |
2593 | SHELL_VAR *var; | |
2594 | { | |
2595 | SHELL_VAR *copy = (SHELL_VAR *)NULL; | |
2596 | ||
2597 | if (var) | |
2598 | { | |
2599 | copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
2600 | ||
2601 | copy->attributes = var->attributes; | |
2602 | copy->name = savestring (var->name); | |
2603 | ||
2604 | if (function_p (var)) | |
2605 | var_setfunc (copy, copy_command (function_cell (var))); | |
2606 | #if defined (ARRAY_VARS) | |
2607 | else if (array_p (var)) | |
fdf670ea CR |
2608 | var_setarray (copy, array_copy (array_cell (var))); |
2609 | else if (assoc_p (var)) | |
2610 | var_setassoc (copy, assoc_copy (assoc_cell (var))); | |
7117c2d2 JA |
2611 | #endif |
2612 | else if (value_cell (var)) | |
2613 | var_setvalue (copy, savestring (value_cell (var))); | |
2614 | else | |
2615 | var_setvalue (copy, (char *)NULL); | |
2616 | ||
2617 | copy->dynamic_value = var->dynamic_value; | |
2618 | copy->assign_func = var->assign_func; | |
2619 | ||
2620 | copy->exportstr = COPY_EXPORTSTR (var); | |
2621 | ||
2622 | copy->context = var->context; | |
2623 | } | |
2624 | return (copy); | |
2625 | } | |
2626 | #endif | |
2627 | ||
2628 | /* **************************************************************** */ | |
2629 | /* */ | |
2630 | /* Deleting and unsetting variables */ | |
2631 | /* */ | |
2632 | /* **************************************************************** */ | |
2633 | ||
726f6388 | 2634 | /* Dispose of the information attached to VAR. */ |
fdf670ea CR |
2635 | static void |
2636 | dispose_variable_value (var) | |
726f6388 JA |
2637 | SHELL_VAR *var; |
2638 | { | |
726f6388 | 2639 | if (function_p (var)) |
ccc6cda3 JA |
2640 | dispose_command (function_cell (var)); |
2641 | #if defined (ARRAY_VARS) | |
2642 | else if (array_p (var)) | |
7117c2d2 | 2643 | array_dispose (array_cell (var)); |
fdf670ea CR |
2644 | else if (assoc_p (var)) |
2645 | assoc_dispose (assoc_cell (var)); | |
ccc6cda3 JA |
2646 | #endif |
2647 | else | |
2648 | FREE (value_cell (var)); | |
fdf670ea CR |
2649 | } |
2650 | ||
2651 | void | |
2652 | dispose_variable (var) | |
2653 | SHELL_VAR *var; | |
2654 | { | |
2655 | if (var == 0) | |
2656 | return; | |
2657 | ||
2658 | if (nofree_p (var) == 0) | |
2659 | dispose_variable_value (var); | |
726f6388 | 2660 | |
bb70624e JA |
2661 | FREE_EXPORTSTR (var); |
2662 | ||
726f6388 JA |
2663 | free (var->name); |
2664 | ||
2665 | if (exported_p (var)) | |
2666 | array_needs_making = 1; | |
2667 | ||
2668 | free (var); | |
2669 | } | |
2670 | ||
7117c2d2 | 2671 | /* Unset the shell variable referenced by NAME. */ |
ccc6cda3 | 2672 | int |
726f6388 | 2673 | unbind_variable (name) |
f73dda09 | 2674 | const char *name; |
726f6388 | 2675 | { |
7117c2d2 JA |
2676 | return makunbound (name, shell_variables); |
2677 | } | |
726f6388 | 2678 | |
7117c2d2 JA |
2679 | /* Unset the shell function named NAME. */ |
2680 | int | |
2681 | unbind_func (name) | |
2682 | const char *name; | |
2683 | { | |
2684 | BUCKET_CONTENTS *elt; | |
2685 | SHELL_VAR *func; | |
726f6388 | 2686 | |
7117c2d2 JA |
2687 | elt = hash_remove (name, shell_functions, 0); |
2688 | ||
2689 | if (elt == 0) | |
2690 | return -1; | |
2691 | ||
2692 | #if defined (PROGRAMMABLE_COMPLETION) | |
2693 | set_itemlist_dirty (&it_functions); | |
ccc6cda3 | 2694 | #endif |
7117c2d2 JA |
2695 | |
2696 | func = (SHELL_VAR *)elt->data; | |
2697 | if (func) | |
726f6388 | 2698 | { |
7117c2d2 JA |
2699 | if (exported_p (func)) |
2700 | array_needs_making++; | |
2701 | dispose_variable (func); | |
726f6388 JA |
2702 | } |
2703 | ||
7117c2d2 JA |
2704 | free (elt->key); |
2705 | free (elt); | |
726f6388 | 2706 | |
7117c2d2 | 2707 | return 0; |
726f6388 JA |
2708 | } |
2709 | ||
b0c16657 | 2710 | #if defined (DEBUGGER) |
d3a24ed2 CR |
2711 | int |
2712 | unbind_function_def (name) | |
2713 | const char *name; | |
2714 | { | |
2715 | BUCKET_CONTENTS *elt; | |
2716 | FUNCTION_DEF *funcdef; | |
2717 | ||
2718 | elt = hash_remove (name, shell_function_defs, 0); | |
2719 | ||
2720 | if (elt == 0) | |
2721 | return -1; | |
2722 | ||
2723 | funcdef = (FUNCTION_DEF *)elt->data; | |
2724 | if (funcdef) | |
2725 | dispose_function_def (funcdef); | |
2726 | ||
2727 | free (elt->key); | |
2728 | free (elt); | |
2729 | ||
2730 | return 0; | |
2731 | } | |
b0c16657 | 2732 | #endif /* DEBUGGER */ |
d3a24ed2 | 2733 | |
726f6388 JA |
2734 | /* Make the variable associated with NAME go away. HASH_LIST is the |
2735 | hash table from which this variable should be deleted (either | |
2736 | shell_variables or shell_functions). | |
2737 | Returns non-zero if the variable couldn't be found. */ | |
ccc6cda3 | 2738 | int |
7117c2d2 | 2739 | makunbound (name, vc) |
f73dda09 | 2740 | const char *name; |
7117c2d2 | 2741 | VAR_CONTEXT *vc; |
726f6388 | 2742 | { |
d166f048 | 2743 | BUCKET_CONTENTS *elt, *new_elt; |
7117c2d2 JA |
2744 | SHELL_VAR *old_var; |
2745 | VAR_CONTEXT *v; | |
726f6388 JA |
2746 | char *t; |
2747 | ||
7117c2d2 JA |
2748 | for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down) |
2749 | if (elt = hash_remove (name, v->table, 0)) | |
2750 | break; | |
726f6388 | 2751 | |
d166f048 | 2752 | if (elt == 0) |
726f6388 JA |
2753 | return (-1); |
2754 | ||
2755 | old_var = (SHELL_VAR *)elt->data; | |
726f6388 JA |
2756 | |
2757 | if (old_var && exported_p (old_var)) | |
2758 | array_needs_making++; | |
2759 | ||
ccc6cda3 | 2760 | /* If we're unsetting a local variable and we're still executing inside |
7117c2d2 JA |
2761 | the function, just mark the variable as invisible. The function |
2762 | eventually called by pop_var_context() will clean it up later. This | |
2763 | must be done so that if the variable is subsequently assigned a new | |
2764 | value inside the function, the `local' attribute is still present. | |
2765 | We also need to add it back into the correct hash table. */ | |
ccc6cda3 JA |
2766 | if (old_var && local_p (old_var) && variable_context == old_var->context) |
2767 | { | |
fdf670ea CR |
2768 | if (nofree_p (old_var)) |
2769 | var_setvalue (old_var, (char *)NULL); | |
b954488b | 2770 | #if defined (ARRAY_VARS) |
fdf670ea | 2771 | else if (array_p (old_var)) |
b954488b | 2772 | array_dispose (array_cell (old_var)); |
fdf670ea CR |
2773 | else if (assoc_p (old_var)) |
2774 | assoc_dispose (assoc_cell (old_var)); | |
b954488b | 2775 | #endif |
fdf670ea | 2776 | else |
b954488b | 2777 | FREE (value_cell (old_var)); |
12d937f9 | 2778 | /* Reset the attributes. Preserve the export attribute if the variable |
fdf670ea CR |
2779 | came from a temporary environment. Make sure it stays local, and |
2780 | make it invisible. */ | |
12d937f9 CR |
2781 | old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0; |
2782 | VSETATTR (old_var, att_local); | |
bb70624e | 2783 | VSETATTR (old_var, att_invisible); |
7117c2d2 | 2784 | var_setvalue (old_var, (char *)NULL); |
bb70624e | 2785 | INVALIDATE_EXPORTSTR (old_var); |
7117c2d2 JA |
2786 | |
2787 | new_elt = hash_insert (savestring (old_var->name), v->table, 0); | |
2788 | new_elt->data = (PTR_T)old_var; | |
ccc6cda3 | 2789 | stupidly_hack_special_variables (old_var->name); |
7117c2d2 | 2790 | |
d166f048 JA |
2791 | free (elt->key); |
2792 | free (elt); | |
ccc6cda3 JA |
2793 | return (0); |
2794 | } | |
2795 | ||
726f6388 JA |
2796 | /* Have to save a copy of name here, because it might refer to |
2797 | old_var->name. If so, stupidly_hack_special_variables will | |
2798 | reference freed memory. */ | |
2799 | t = savestring (name); | |
2800 | ||
2801 | free (elt->key); | |
2802 | free (elt); | |
2803 | ||
2804 | dispose_variable (old_var); | |
2805 | stupidly_hack_special_variables (t); | |
2806 | free (t); | |
7117c2d2 | 2807 | |
726f6388 JA |
2808 | return (0); |
2809 | } | |
2810 | ||
7117c2d2 JA |
2811 | /* Get rid of all of the variables in the current context. */ |
2812 | void | |
2813 | kill_all_local_variables () | |
726f6388 | 2814 | { |
7117c2d2 JA |
2815 | VAR_CONTEXT *vc; |
2816 | ||
2817 | for (vc = shell_variables; vc; vc = vc->down) | |
2818 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
2819 | break; | |
2820 | if (vc == 0) | |
2821 | return; /* XXX */ | |
726f6388 | 2822 | |
7117c2d2 | 2823 | if (vc->table && vc_haslocals (vc)) |
726f6388 | 2824 | { |
7117c2d2 JA |
2825 | delete_all_variables (vc->table); |
2826 | hash_dispose (vc->table); | |
726f6388 | 2827 | } |
7117c2d2 | 2828 | vc->table = (HASH_TABLE *)NULL; |
726f6388 JA |
2829 | } |
2830 | ||
ccc6cda3 JA |
2831 | static void |
2832 | free_variable_hash_data (data) | |
f73dda09 | 2833 | PTR_T data; |
ccc6cda3 | 2834 | { |
7117c2d2 | 2835 | SHELL_VAR *var; |
ccc6cda3 JA |
2836 | |
2837 | var = (SHELL_VAR *)data; | |
7117c2d2 | 2838 | dispose_variable (var); |
ccc6cda3 JA |
2839 | } |
2840 | ||
726f6388 JA |
2841 | /* Delete the entire contents of the hash table. */ |
2842 | void | |
2843 | delete_all_variables (hashed_vars) | |
2844 | HASH_TABLE *hashed_vars; | |
2845 | { | |
7117c2d2 | 2846 | hash_flush (hashed_vars, free_variable_hash_data); |
726f6388 JA |
2847 | } |
2848 | ||
7117c2d2 JA |
2849 | /* **************************************************************** */ |
2850 | /* */ | |
2851 | /* Setting variable attributes */ | |
2852 | /* */ | |
2853 | /* **************************************************************** */ | |
726f6388 | 2854 | |
ccc6cda3 JA |
2855 | #define FIND_OR_MAKE_VARIABLE(name, entry) \ |
2856 | do \ | |
2857 | { \ | |
2858 | entry = find_variable (name); \ | |
2859 | if (!entry) \ | |
2860 | { \ | |
d11b8b46 | 2861 | entry = bind_variable (name, "", 0); \ |
5f8cde23 | 2862 | if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \ |
ccc6cda3 JA |
2863 | } \ |
2864 | } \ | |
2865 | while (0) | |
2866 | ||
2867 | /* Make the variable associated with NAME be readonly. | |
726f6388 JA |
2868 | If NAME does not exist yet, create it. */ |
2869 | void | |
2870 | set_var_read_only (name) | |
2871 | char *name; | |
2872 | { | |
ccc6cda3 | 2873 | SHELL_VAR *entry; |
726f6388 | 2874 | |
ccc6cda3 | 2875 | FIND_OR_MAKE_VARIABLE (name, entry); |
bb70624e | 2876 | VSETATTR (entry, att_readonly); |
726f6388 JA |
2877 | } |
2878 | ||
cce855bc | 2879 | #ifdef INCLUDE_UNUSED |
ccc6cda3 | 2880 | /* Make the function associated with NAME be readonly. |
726f6388 JA |
2881 | If NAME does not exist, we just punt, like auto_export code below. */ |
2882 | void | |
2883 | set_func_read_only (name) | |
f73dda09 | 2884 | const char *name; |
726f6388 | 2885 | { |
d166f048 | 2886 | SHELL_VAR *entry; |
726f6388 | 2887 | |
d166f048 | 2888 | entry = find_function (name); |
726f6388 | 2889 | if (entry) |
bb70624e | 2890 | VSETATTR (entry, att_readonly); |
726f6388 JA |
2891 | } |
2892 | ||
2893 | /* Make the variable associated with NAME be auto-exported. | |
2894 | If NAME does not exist yet, create it. */ | |
2895 | void | |
2896 | set_var_auto_export (name) | |
2897 | char *name; | |
2898 | { | |
ccc6cda3 | 2899 | SHELL_VAR *entry; |
726f6388 | 2900 | |
ccc6cda3 | 2901 | FIND_OR_MAKE_VARIABLE (name, entry); |
726f6388 JA |
2902 | set_auto_export (entry); |
2903 | } | |
2904 | ||
2905 | /* Make the function associated with NAME be auto-exported. */ | |
2906 | void | |
2907 | set_func_auto_export (name) | |
f73dda09 | 2908 | const char *name; |
726f6388 | 2909 | { |
ccc6cda3 | 2910 | SHELL_VAR *entry; |
726f6388 | 2911 | |
ccc6cda3 | 2912 | entry = find_function (name); |
726f6388 | 2913 | if (entry) |
ccc6cda3 JA |
2914 | set_auto_export (entry); |
2915 | } | |
cce855bc | 2916 | #endif |
ccc6cda3 | 2917 | |
7117c2d2 JA |
2918 | /* **************************************************************** */ |
2919 | /* */ | |
2920 | /* Creating lists of variables */ | |
2921 | /* */ | |
2922 | /* **************************************************************** */ | |
2923 | ||
2924 | static VARLIST * | |
2925 | vlist_alloc (nentries) | |
2926 | int nentries; | |
726f6388 | 2927 | { |
7117c2d2 | 2928 | VARLIST *vlist; |
726f6388 | 2929 | |
7117c2d2 JA |
2930 | vlist = (VARLIST *)xmalloc (sizeof (VARLIST)); |
2931 | vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *)); | |
2932 | vlist->list_size = nentries; | |
2933 | vlist->list_len = 0; | |
2934 | vlist->list[0] = (SHELL_VAR *)NULL; | |
726f6388 | 2935 | |
7117c2d2 JA |
2936 | return vlist; |
2937 | } | |
726f6388 | 2938 | |
7117c2d2 JA |
2939 | static VARLIST * |
2940 | vlist_realloc (vlist, n) | |
2941 | VARLIST *vlist; | |
2942 | int n; | |
2943 | { | |
2944 | if (vlist == 0) | |
2945 | return (vlist = vlist_alloc (n)); | |
2946 | if (n > vlist->list_size) | |
726f6388 | 2947 | { |
7117c2d2 JA |
2948 | vlist->list_size = n; |
2949 | vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *)); | |
2950 | } | |
2951 | return vlist; | |
2952 | } | |
726f6388 | 2953 | |
7117c2d2 JA |
2954 | static void |
2955 | vlist_add (vlist, var, flags) | |
2956 | VARLIST *vlist; | |
2957 | SHELL_VAR *var; | |
2958 | int flags; | |
2959 | { | |
2960 | register int i; | |
ccc6cda3 | 2961 | |
7117c2d2 JA |
2962 | for (i = 0; i < vlist->list_len; i++) |
2963 | if (STREQ (var->name, vlist->list[i]->name)) | |
2964 | break; | |
2965 | if (i < vlist->list_len) | |
2966 | return; | |
2967 | ||
2968 | if (i >= vlist->list_size) | |
2969 | vlist = vlist_realloc (vlist, vlist->list_size + 16); | |
726f6388 | 2970 | |
7117c2d2 JA |
2971 | vlist->list[vlist->list_len++] = var; |
2972 | vlist->list[vlist->list_len] = (SHELL_VAR *)NULL; | |
2973 | } | |
2974 | ||
2975 | /* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the | |
2976 | variables for which FUNCTION returns a non-zero value. A NULL value | |
2977 | for FUNCTION means to use all variables. */ | |
2978 | SHELL_VAR ** | |
2979 | map_over (function, vc) | |
2980 | sh_var_map_func_t *function; | |
2981 | VAR_CONTEXT *vc; | |
2982 | { | |
2983 | VAR_CONTEXT *v; | |
2984 | VARLIST *vlist; | |
2985 | SHELL_VAR **ret; | |
2986 | int nentries; | |
2987 | ||
2988 | for (nentries = 0, v = vc; v; v = v->down) | |
2989 | nentries += HASH_ENTRIES (v->table); | |
2990 | ||
2991 | if (nentries == 0) | |
2992 | return (SHELL_VAR **)NULL; | |
2993 | ||
2994 | vlist = vlist_alloc (nentries); | |
2995 | ||
2996 | for (v = vc; v; v = v->down) | |
2997 | flatten (v->table, function, vlist, 0); | |
2998 | ||
2999 | ret = vlist->list; | |
3000 | free (vlist); | |
3001 | return ret; | |
3002 | } | |
3003 | ||
3004 | SHELL_VAR ** | |
3005 | map_over_funcs (function) | |
3006 | sh_var_map_func_t *function; | |
3007 | { | |
3008 | VARLIST *vlist; | |
3009 | SHELL_VAR **ret; | |
3010 | ||
3011 | if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0) | |
3012 | return ((SHELL_VAR **)NULL); | |
3013 | ||
3014 | vlist = vlist_alloc (HASH_ENTRIES (shell_functions)); | |
3015 | ||
3016 | flatten (shell_functions, function, vlist, 0); | |
3017 | ||
3018 | ret = vlist->list; | |
3019 | free (vlist); | |
3020 | return ret; | |
3021 | } | |
3022 | ||
3023 | /* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those | |
3024 | elements for which FUNC succeeds to VLIST->list. FLAGS is reserved | |
3025 | for future use. Only unique names are added to VLIST. If FUNC is | |
3026 | NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is | |
3027 | NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST | |
3028 | and FUNC are both NULL, nothing happens. */ | |
3029 | static void | |
3030 | flatten (var_hash_table, func, vlist, flags) | |
3031 | HASH_TABLE *var_hash_table; | |
3032 | sh_var_map_func_t *func; | |
3033 | VARLIST *vlist; | |
3034 | int flags; | |
3035 | { | |
3036 | register int i; | |
3037 | register BUCKET_CONTENTS *tlist; | |
3038 | int r; | |
3039 | SHELL_VAR *var; | |
3040 | ||
3041 | if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0)) | |
3042 | return; | |
3043 | ||
3044 | for (i = 0; i < var_hash_table->nbuckets; i++) | |
3045 | { | |
3046 | for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next) | |
3047 | { | |
3048 | var = (SHELL_VAR *)tlist->data; | |
3049 | ||
3050 | r = func ? (*func) (var) : 1; | |
3051 | if (r && vlist) | |
3052 | vlist_add (vlist, var, flags); | |
3053 | } | |
726f6388 | 3054 | } |
7117c2d2 JA |
3055 | } |
3056 | ||
3057 | void | |
3058 | sort_variables (array) | |
3059 | SHELL_VAR **array; | |
3060 | { | |
3061 | qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp); | |
726f6388 JA |
3062 | } |
3063 | ||
3064 | static int | |
7117c2d2 JA |
3065 | qsort_var_comp (var1, var2) |
3066 | SHELL_VAR **var1, **var2; | |
726f6388 | 3067 | { |
7117c2d2 JA |
3068 | int result; |
3069 | ||
3070 | if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0) | |
3071 | result = strcmp ((*var1)->name, (*var2)->name); | |
3072 | ||
3073 | return (result); | |
726f6388 JA |
3074 | } |
3075 | ||
7117c2d2 JA |
3076 | /* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for |
3077 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
ccc6cda3 | 3078 | static SHELL_VAR ** |
7117c2d2 JA |
3079 | vapply (func) |
3080 | sh_var_map_func_t *func; | |
726f6388 JA |
3081 | { |
3082 | SHELL_VAR **list; | |
3083 | ||
7117c2d2 | 3084 | list = map_over (func, shell_variables); |
d166f048 | 3085 | if (list /* && posixly_correct */) |
726f6388 | 3086 | sort_variables (list); |
7117c2d2 JA |
3087 | return (list); |
3088 | } | |
726f6388 | 3089 | |
7117c2d2 JA |
3090 | /* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for |
3091 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
3092 | static SHELL_VAR ** | |
3093 | fapply (func) | |
3094 | sh_var_map_func_t *func; | |
3095 | { | |
3096 | SHELL_VAR **list; | |
3097 | ||
3098 | list = map_over_funcs (func); | |
3099 | if (list /* && posixly_correct */) | |
3100 | sort_variables (list); | |
726f6388 JA |
3101 | return (list); |
3102 | } | |
3103 | ||
7117c2d2 JA |
3104 | /* Create a NULL terminated array of all the shell variables. */ |
3105 | SHELL_VAR ** | |
3106 | all_shell_variables () | |
3107 | { | |
3108 | return (vapply ((sh_var_map_func_t *)NULL)); | |
3109 | } | |
3110 | ||
3111 | /* Create a NULL terminated array of all the shell functions. */ | |
3112 | SHELL_VAR ** | |
3113 | all_shell_functions () | |
3114 | { | |
3115 | return (fapply ((sh_var_map_func_t *)NULL)); | |
3116 | } | |
3117 | ||
3118 | static int | |
3119 | visible_var (var) | |
3120 | SHELL_VAR *var; | |
3121 | { | |
3122 | return (invisible_p (var) == 0); | |
3123 | } | |
3124 | ||
726f6388 | 3125 | SHELL_VAR ** |
bb70624e | 3126 | all_visible_functions () |
726f6388 | 3127 | { |
7117c2d2 | 3128 | return (fapply (visible_var)); |
ccc6cda3 | 3129 | } |
726f6388 | 3130 | |
ccc6cda3 | 3131 | SHELL_VAR ** |
bb70624e | 3132 | all_visible_variables () |
ccc6cda3 | 3133 | { |
7117c2d2 | 3134 | return (vapply (visible_var)); |
726f6388 JA |
3135 | } |
3136 | ||
ccc6cda3 JA |
3137 | /* Return non-zero if the variable VAR is visible and exported. Array |
3138 | variables cannot be exported. */ | |
726f6388 JA |
3139 | static int |
3140 | visible_and_exported (var) | |
3141 | SHELL_VAR *var; | |
3142 | { | |
ccc6cda3 | 3143 | return (invisible_p (var) == 0 && exported_p (var)); |
726f6388 JA |
3144 | } |
3145 | ||
3a372c75 CR |
3146 | /* Candidate variables for the export environment are either valid variables |
3147 | with the export attribute or invalid variables inherited from the initial | |
3148 | environment and simply passed through. */ | |
3149 | static int | |
3150 | export_environment_candidate (var) | |
3151 | SHELL_VAR *var; | |
3152 | { | |
3153 | return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var))); | |
3154 | } | |
3155 | ||
7117c2d2 JA |
3156 | /* Return non-zero if VAR is a local variable in the current context and |
3157 | is exported. */ | |
3158 | static int | |
3159 | local_and_exported (var) | |
3160 | SHELL_VAR *var; | |
3161 | { | |
3162 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var)); | |
3163 | } | |
3164 | ||
bb70624e JA |
3165 | SHELL_VAR ** |
3166 | all_exported_variables () | |
3167 | { | |
7117c2d2 JA |
3168 | return (vapply (visible_and_exported)); |
3169 | } | |
bb70624e | 3170 | |
7117c2d2 JA |
3171 | SHELL_VAR ** |
3172 | local_exported_variables () | |
3173 | { | |
3174 | return (vapply (local_and_exported)); | |
3175 | } | |
3176 | ||
3177 | static int | |
3178 | variable_in_context (var) | |
3179 | SHELL_VAR *var; | |
3180 | { | |
3181 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context); | |
3182 | } | |
3183 | ||
3184 | SHELL_VAR ** | |
3185 | all_local_variables () | |
3186 | { | |
3187 | VARLIST *vlist; | |
3188 | SHELL_VAR **ret; | |
3189 | VAR_CONTEXT *vc; | |
3190 | ||
3191 | vc = shell_variables; | |
3192 | for (vc = shell_variables; vc; vc = vc->down) | |
3193 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
3194 | break; | |
3195 | ||
3196 | if (vc == 0) | |
3197 | { | |
5e13499c | 3198 | internal_error (_("all_local_variables: no function context at current scope")); |
7117c2d2 JA |
3199 | return (SHELL_VAR **)NULL; |
3200 | } | |
3201 | if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0) | |
3202 | return (SHELL_VAR **)NULL; | |
3203 | ||
3204 | vlist = vlist_alloc (HASH_ENTRIES (vc->table)); | |
3205 | ||
3206 | flatten (vc->table, variable_in_context, vlist, 0); | |
3207 | ||
3208 | ret = vlist->list; | |
3209 | free (vlist); | |
3210 | if (ret) | |
3211 | sort_variables (ret); | |
3212 | return ret; | |
bb70624e JA |
3213 | } |
3214 | ||
3215 | #if defined (ARRAY_VARS) | |
3216 | /* Return non-zero if the variable VAR is visible and an array. */ | |
3217 | static int | |
3218 | visible_array_vars (var) | |
3219 | SHELL_VAR *var; | |
3220 | { | |
3221 | return (invisible_p (var) == 0 && array_p (var)); | |
3222 | } | |
3223 | ||
3224 | SHELL_VAR ** | |
3225 | all_array_variables () | |
3226 | { | |
7117c2d2 | 3227 | return (vapply (visible_array_vars)); |
bb70624e JA |
3228 | } |
3229 | #endif /* ARRAY_VARS */ | |
3230 | ||
3231 | char ** | |
3232 | all_variables_matching_prefix (prefix) | |
f73dda09 | 3233 | const char *prefix; |
bb70624e JA |
3234 | { |
3235 | SHELL_VAR **varlist; | |
3236 | char **rlist; | |
3237 | int vind, rind, plen; | |
3238 | ||
3239 | plen = STRLEN (prefix); | |
3240 | varlist = all_visible_variables (); | |
3241 | for (vind = 0; varlist && varlist[vind]; vind++) | |
3242 | ; | |
3243 | if (varlist == 0 || vind == 0) | |
3244 | return ((char **)NULL); | |
7117c2d2 | 3245 | rlist = strvec_create (vind + 1); |
bb70624e JA |
3246 | for (vind = rind = 0; varlist[vind]; vind++) |
3247 | { | |
3248 | if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen)) | |
28ef6c31 | 3249 | rlist[rind++] = savestring (varlist[vind]->name); |
bb70624e JA |
3250 | } |
3251 | rlist[rind] = (char *)0; | |
3252 | free (varlist); | |
3253 | ||
3254 | return rlist; | |
3255 | } | |
3256 | ||
7117c2d2 JA |
3257 | /* **************************************************************** */ |
3258 | /* */ | |
3259 | /* Managing temporary variable scopes */ | |
3260 | /* */ | |
3261 | /* **************************************************************** */ | |
3262 | ||
3263 | /* Make variable NAME have VALUE in the temporary environment. */ | |
3264 | static SHELL_VAR * | |
3265 | bind_tempenv_variable (name, value) | |
3266 | const char *name; | |
3267 | char *value; | |
3268 | { | |
3269 | SHELL_VAR *var; | |
3270 | ||
3271 | var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL; | |
3272 | ||
3273 | if (var) | |
3274 | { | |
3275 | FREE (value_cell (var)); | |
3276 | var_setvalue (var, savestring (value)); | |
3277 | INVALIDATE_EXPORTSTR (var); | |
3278 | } | |
3279 | ||
3280 | return (var); | |
3281 | } | |
3282 | ||
3283 | /* Find a variable in the temporary environment that is named NAME. | |
3284 | Return the SHELL_VAR *, or NULL if not found. */ | |
3285 | SHELL_VAR * | |
3286 | find_tempenv_variable (name) | |
3287 | const char *name; | |
3288 | { | |
3289 | return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL); | |
3290 | } | |
3291 | ||
adc6cff5 CR |
3292 | char **tempvar_list; |
3293 | int tvlist_ind; | |
3294 | ||
7117c2d2 JA |
3295 | /* Push the variable described by (SHELL_VAR *)DATA down to the next |
3296 | variable context from the temporary environment. */ | |
3297 | static void | |
3298 | push_temp_var (data) | |
3299 | PTR_T data; | |
3300 | { | |
3301 | SHELL_VAR *var, *v; | |
3302 | HASH_TABLE *binding_table; | |
3303 | ||
3304 | var = (SHELL_VAR *)data; | |
3305 | ||
3306 | binding_table = shell_variables->table; | |
3307 | if (binding_table == 0) | |
3308 | { | |
3309 | if (shell_variables == global_variables) | |
3310 | /* shouldn't happen */ | |
3311 | binding_table = shell_variables->table = global_variables->table = hash_create (0); | |
3312 | else | |
3313 | binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS); | |
3314 | } | |
3315 | ||
d11b8b46 | 3316 | v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, 0); |
7117c2d2 JA |
3317 | |
3318 | /* XXX - should we set the context here? It shouldn't matter because of how | |
3319 | assign_in_env works, but might want to check. */ | |
3320 | if (binding_table == global_variables->table) /* XXX */ | |
3321 | var->attributes &= ~(att_tempvar|att_propagate); | |
3322 | else | |
3323 | { | |
3324 | var->attributes |= att_propagate; | |
3325 | if (binding_table == shell_variables->table) | |
3326 | shell_variables->flags |= VC_HASTMPVAR; | |
3327 | } | |
3328 | v->attributes |= var->attributes; | |
3329 | ||
adc6cff5 CR |
3330 | if (find_special_var (var->name) >= 0) |
3331 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
3332 | ||
7117c2d2 JA |
3333 | dispose_variable (var); |
3334 | } | |
3335 | ||
3336 | static void | |
3337 | propagate_temp_var (data) | |
3338 | PTR_T data; | |
3339 | { | |
3340 | SHELL_VAR *var; | |
3341 | ||
3342 | var = (SHELL_VAR *)data; | |
3343 | if (tempvar_p (var) && (var->attributes & att_propagate)) | |
3344 | push_temp_var (data); | |
3345 | else | |
adc6cff5 CR |
3346 | { |
3347 | if (find_special_var (var->name) >= 0) | |
3348 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
3349 | dispose_variable (var); | |
3350 | } | |
7117c2d2 JA |
3351 | } |
3352 | ||
3353 | /* Free the storage used in the hash table for temporary | |
3354 | environment variables. PUSHF is a function to be called | |
3355 | to free each hash table entry. It takes care of pushing variables | |
adc6cff5 CR |
3356 | to previous scopes if appropriate. PUSHF stores names of variables |
3357 | that require special handling (e.g., IFS) on tempvar_list, so this | |
3358 | function can call stupidly_hack_special_variables on all the | |
3359 | variables in the list when the temporary hash table is destroyed. */ | |
7117c2d2 JA |
3360 | static void |
3361 | dispose_temporary_env (pushf) | |
3362 | sh_free_func_t *pushf; | |
3363 | { | |
adc6cff5 CR |
3364 | int i; |
3365 | ||
3366 | tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1); | |
3367 | tempvar_list[tvlist_ind = 0] = 0; | |
3368 | ||
7117c2d2 JA |
3369 | hash_flush (temporary_env, pushf); |
3370 | hash_dispose (temporary_env); | |
fdf670ea | 3371 | temporary_env = (HASH_TABLE *)NULL; |
7117c2d2 | 3372 | |
adc6cff5 CR |
3373 | tempvar_list[tvlist_ind] = 0; |
3374 | ||
7117c2d2 JA |
3375 | array_needs_making = 1; |
3376 | ||
adc6cff5 CR |
3377 | #if 0 |
3378 | sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */ | |
3379 | #endif | |
3380 | for (i = 0; i < tvlist_ind; i++) | |
3381 | stupidly_hack_special_variables (tempvar_list[i]); | |
3382 | ||
3383 | strvec_dispose (tempvar_list); | |
3384 | tempvar_list = 0; | |
3385 | tvlist_ind = 0; | |
7117c2d2 JA |
3386 | } |
3387 | ||
3388 | void | |
3389 | dispose_used_env_vars () | |
3390 | { | |
3391 | if (temporary_env) | |
d3ad40de CR |
3392 | { |
3393 | dispose_temporary_env (propagate_temp_var); | |
3394 | maybe_make_export_env (); | |
3395 | } | |
7117c2d2 JA |
3396 | } |
3397 | ||
3398 | /* Take all of the shell variables in the temporary environment HASH_TABLE | |
3399 | and make shell variables from them at the current variable context. */ | |
3400 | void | |
3401 | merge_temporary_env () | |
3402 | { | |
3403 | if (temporary_env) | |
3404 | dispose_temporary_env (push_temp_var); | |
3405 | } | |
3406 | ||
3407 | /* **************************************************************** */ | |
3408 | /* */ | |
3409 | /* Creating and manipulating the environment */ | |
3410 | /* */ | |
3411 | /* **************************************************************** */ | |
3412 | ||
bb70624e JA |
3413 | static inline char * |
3414 | mk_env_string (name, value) | |
f73dda09 | 3415 | const char *name, *value; |
bb70624e JA |
3416 | { |
3417 | int name_len, value_len; | |
3418 | char *p; | |
3419 | ||
3420 | name_len = strlen (name); | |
3421 | value_len = STRLEN (value); | |
f73dda09 | 3422 | p = (char *)xmalloc (2 + name_len + value_len); |
bb70624e JA |
3423 | strcpy (p, name); |
3424 | p[name_len] = '='; | |
3425 | if (value && *value) | |
3426 | strcpy (p + name_len + 1, value); | |
3427 | else | |
3428 | p[name_len + 1] = '\0'; | |
3429 | return (p); | |
3430 | } | |
3431 | ||
f73dda09 | 3432 | #ifdef DEBUG |
bb70624e JA |
3433 | /* Debugging */ |
3434 | static int | |
3435 | valid_exportstr (v) | |
3436 | SHELL_VAR *v; | |
3437 | { | |
3438 | char *s; | |
3439 | ||
3440 | s = v->exportstr; | |
824dfe68 CR |
3441 | if (s == 0) |
3442 | { | |
3443 | internal_error (_("%s has null exportstr"), v->name); | |
3444 | return (0); | |
3445 | } | |
f73dda09 | 3446 | if (legal_variable_starter ((unsigned char)*s) == 0) |
bb70624e | 3447 | { |
5e13499c | 3448 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
3449 | return (0); |
3450 | } | |
3451 | for (s = v->exportstr + 1; s && *s; s++) | |
3452 | { | |
3453 | if (*s == '=') | |
28ef6c31 | 3454 | break; |
f73dda09 | 3455 | if (legal_variable_char ((unsigned char)*s) == 0) |
bb70624e | 3456 | { |
5e13499c | 3457 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
3458 | return (0); |
3459 | } | |
3460 | } | |
3461 | if (*s != '=') | |
3462 | { | |
5e13499c | 3463 | internal_error (_("no `=' in exportstr for %s"), v->name); |
bb70624e JA |
3464 | return (0); |
3465 | } | |
3466 | return (1); | |
3467 | } | |
f73dda09 | 3468 | #endif |
bb70624e | 3469 | |
7117c2d2 JA |
3470 | static char ** |
3471 | make_env_array_from_var_list (vars) | |
3472 | SHELL_VAR **vars; | |
726f6388 JA |
3473 | { |
3474 | register int i, list_index; | |
3475 | register SHELL_VAR *var; | |
ccc6cda3 | 3476 | char **list, *value; |
726f6388 | 3477 | |
7117c2d2 | 3478 | list = strvec_create ((1 + strvec_len ((char **)vars))); |
bb70624e JA |
3479 | |
3480 | #define USE_EXPORTSTR (value == var->exportstr) | |
726f6388 JA |
3481 | |
3482 | for (i = 0, list_index = 0; var = vars[i]; i++) | |
3483 | { | |
28ef6c31 JA |
3484 | #if defined (__CYGWIN__) |
3485 | /* We don't use the exportstr stuff on Cygwin at all. */ | |
3486 | INVALIDATE_EXPORTSTR (var); | |
bb70624e | 3487 | #endif |
28ef6c31 JA |
3488 | if (var->exportstr) |
3489 | value = var->exportstr; | |
bb70624e | 3490 | else if (function_p (var)) |
ccc6cda3 JA |
3491 | value = named_function_string ((char *)NULL, function_cell (var), 0); |
3492 | #if defined (ARRAY_VARS) | |
3493 | else if (array_p (var)) | |
3494 | # if 0 | |
3495 | value = array_to_assignment_string (array_cell (var)); | |
3496 | # else | |
3497 | continue; /* XXX array vars cannot yet be exported */ | |
fdf670ea CR |
3498 | # endif |
3499 | else if (assoc_p (var)) | |
3500 | # if 0 | |
3501 | value = assoc_to_assignment_string (assoc_cell (var)); | |
3502 | # else | |
3503 | continue; /* XXX associative array vars cannot yet be exported */ | |
ccc6cda3 JA |
3504 | # endif |
3505 | #endif | |
726f6388 JA |
3506 | else |
3507 | value = value_cell (var); | |
3508 | ||
3509 | if (value) | |
3510 | { | |
bb70624e JA |
3511 | /* Gee, I'd like to get away with not using savestring() if we're |
3512 | using the cached exportstr... */ | |
3513 | list[list_index] = USE_EXPORTSTR ? savestring (value) | |
3514 | : mk_env_string (var->name, value); | |
3515 | ||
7117c2d2 JA |
3516 | if (USE_EXPORTSTR == 0) |
3517 | SAVE_EXPORTSTR (var, list[list_index]); | |
3518 | ||
726f6388 | 3519 | list_index++; |
bb70624e JA |
3520 | #undef USE_EXPORTSTR |
3521 | ||
3522 | #if 0 /* not yet */ | |
ccc6cda3 | 3523 | #if defined (ARRAY_VARS) |
fdf670ea | 3524 | if (array_p (var) || assoc_p (var)) |
ccc6cda3 | 3525 | free (value); |
bb70624e | 3526 | #endif |
ccc6cda3 | 3527 | #endif |
726f6388 JA |
3528 | } |
3529 | } | |
3530 | ||
726f6388 JA |
3531 | list[list_index] = (char *)NULL; |
3532 | return (list); | |
3533 | } | |
3534 | ||
7117c2d2 JA |
3535 | /* Make an array of assignment statements from the hash table |
3536 | HASHED_VARS which contains SHELL_VARs. Only visible, exported | |
3537 | variables are eligible. */ | |
3538 | static char ** | |
3539 | make_var_export_array (vcxt) | |
3540 | VAR_CONTEXT *vcxt; | |
726f6388 | 3541 | { |
7117c2d2 JA |
3542 | char **list; |
3543 | SHELL_VAR **vars; | |
726f6388 | 3544 | |
3a372c75 | 3545 | #if 0 |
7117c2d2 | 3546 | vars = map_over (visible_and_exported, vcxt); |
3a372c75 CR |
3547 | #else |
3548 | vars = map_over (export_environment_candidate, vcxt); | |
3549 | #endif | |
726f6388 | 3550 | |
7117c2d2 JA |
3551 | if (vars == 0) |
3552 | return (char **)NULL; | |
ccc6cda3 | 3553 | |
7117c2d2 | 3554 | list = make_env_array_from_var_list (vars); |
ccc6cda3 | 3555 | |
7117c2d2 JA |
3556 | free (vars); |
3557 | return (list); | |
ccc6cda3 JA |
3558 | } |
3559 | ||
7117c2d2 JA |
3560 | static char ** |
3561 | make_func_export_array () | |
726f6388 | 3562 | { |
7117c2d2 JA |
3563 | char **list; |
3564 | SHELL_VAR **vars; | |
ccc6cda3 | 3565 | |
7117c2d2 JA |
3566 | vars = map_over_funcs (visible_and_exported); |
3567 | if (vars == 0) | |
3568 | return (char **)NULL; | |
726f6388 | 3569 | |
7117c2d2 | 3570 | list = make_env_array_from_var_list (vars); |
28ef6c31 | 3571 | |
7117c2d2 JA |
3572 | free (vars); |
3573 | return (list); | |
bb70624e JA |
3574 | } |
3575 | ||
d166f048 JA |
3576 | /* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */ |
3577 | #define add_to_export_env(envstr,do_alloc) \ | |
3578 | do \ | |
3579 | { \ | |
3580 | if (export_env_index >= (export_env_size - 1)) \ | |
3581 | { \ | |
3582 | export_env_size += 16; \ | |
7117c2d2 | 3583 | export_env = strvec_resize (export_env, export_env_size); \ |
0f445e6c | 3584 | environ = export_env; \ |
d166f048 JA |
3585 | } \ |
3586 | export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \ | |
3587 | export_env[export_env_index] = (char *)NULL; \ | |
3588 | } while (0) | |
3589 | ||
d166f048 JA |
3590 | /* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the |
3591 | array with the same left-hand side. Return the new EXPORT_ENV. */ | |
726f6388 | 3592 | char ** |
d166f048 | 3593 | add_or_supercede_exported_var (assign, do_alloc) |
726f6388 | 3594 | char *assign; |
d166f048 | 3595 | int do_alloc; |
726f6388 JA |
3596 | { |
3597 | register int i; | |
d166f048 | 3598 | int equal_offset; |
726f6388 | 3599 | |
5e13499c | 3600 | equal_offset = assignment (assign, 0); |
d166f048 JA |
3601 | if (equal_offset == 0) |
3602 | return (export_env); | |
726f6388 | 3603 | |
7117c2d2 JA |
3604 | /* If this is a function, then only supersede the function definition. |
3605 | We do this by including the `=() {' in the comparison, like | |
3606 | initialize_shell_variables does. */ | |
3607 | if (assign[equal_offset + 1] == '(' && | |
3608 | strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */ | |
3609 | equal_offset += 4; | |
726f6388 | 3610 | |
d166f048 | 3611 | for (i = 0; i < export_env_index; i++) |
726f6388 | 3612 | { |
d166f048 | 3613 | if (STREQN (assign, export_env[i], equal_offset + 1)) |
726f6388 | 3614 | { |
d166f048 JA |
3615 | free (export_env[i]); |
3616 | export_env[i] = do_alloc ? savestring (assign) : assign; | |
3617 | return (export_env); | |
726f6388 JA |
3618 | } |
3619 | } | |
d166f048 JA |
3620 | add_to_export_env (assign, do_alloc); |
3621 | return (export_env); | |
726f6388 JA |
3622 | } |
3623 | ||
7117c2d2 JA |
3624 | static void |
3625 | add_temp_array_to_env (temp_array, do_alloc, do_supercede) | |
3626 | char **temp_array; | |
3627 | int do_alloc, do_supercede; | |
3628 | { | |
3629 | register int i; | |
3630 | ||
3631 | if (temp_array == 0) | |
3632 | return; | |
3633 | ||
3634 | for (i = 0; temp_array[i]; i++) | |
3635 | { | |
3636 | if (do_supercede) | |
3637 | export_env = add_or_supercede_exported_var (temp_array[i], do_alloc); | |
3638 | else | |
3639 | add_to_export_env (temp_array[i], do_alloc); | |
3640 | } | |
3641 | ||
3642 | free (temp_array); | |
3643 | } | |
3644 | ||
d166f048 | 3645 | /* Make the environment array for the command about to be executed, if the |
726f6388 JA |
3646 | array needs making. Otherwise, do nothing. If a shell action could |
3647 | change the array that commands receive for their environment, then the | |
7117c2d2 JA |
3648 | code should `array_needs_making++'. |
3649 | ||
3650 | The order to add to the array is: | |
3651 | temporary_env | |
3652 | list of var contexts whose head is shell_variables | |
3653 | shell_functions | |
3654 | ||
3655 | This is the shell variable lookup order. We add only new variable | |
3656 | names at each step, which allows local variables and variables in | |
3657 | the temporary environments to shadow variables in the global (or | |
3658 | any previous) scope. | |
3659 | */ | |
3660 | ||
3661 | static int | |
3662 | n_shell_variables () | |
3663 | { | |
3664 | VAR_CONTEXT *vc; | |
3665 | int n; | |
3666 | ||
3667 | for (n = 0, vc = shell_variables; vc; vc = vc->down) | |
3668 | n += HASH_ENTRIES (vc->table); | |
3669 | return n; | |
3670 | } | |
3671 | ||
9c2db999 CR |
3672 | int |
3673 | chkexport (name) | |
3674 | char *name; | |
3675 | { | |
3676 | SHELL_VAR *v; | |
3677 | ||
3678 | v = find_variable (name); | |
40647963 | 3679 | if (v && exported_p (v)) |
9c2db999 CR |
3680 | { |
3681 | array_needs_making = 1; | |
3682 | maybe_make_export_env (); | |
3683 | return 1; | |
3684 | } | |
3685 | return 0; | |
3686 | } | |
3687 | ||
726f6388 JA |
3688 | void |
3689 | maybe_make_export_env () | |
3690 | { | |
726f6388 | 3691 | register char **temp_array; |
d166f048 | 3692 | int new_size; |
7117c2d2 | 3693 | VAR_CONTEXT *tcxt; |
726f6388 JA |
3694 | |
3695 | if (array_needs_making) | |
3696 | { | |
3697 | if (export_env) | |
fdf670ea | 3698 | strvec_flush (export_env); |
d166f048 JA |
3699 | |
3700 | /* Make a guess based on how many shell variables and functions we | |
3701 | have. Since there will always be array variables, and array | |
3702 | variables are not (yet) exported, this will always be big enough | |
7117c2d2 JA |
3703 | for the exported variables and functions. */ |
3704 | new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 + | |
3705 | HASH_ENTRIES (temporary_env); | |
d166f048 JA |
3706 | if (new_size > export_env_size) |
3707 | { | |
3708 | export_env_size = new_size; | |
7117c2d2 | 3709 | export_env = strvec_resize (export_env, export_env_size); |
0f445e6c | 3710 | environ = export_env; |
d166f048 JA |
3711 | } |
3712 | export_env[export_env_index = 0] = (char *)NULL; | |
726f6388 | 3713 | |
3a372c75 | 3714 | /* Make a dummy variable context from the temporary_env, stick it on |
fdf670ea CR |
3715 | the front of shell_variables, call make_var_export_array on the |
3716 | whole thing to flatten it, and convert the list of SHELL_VAR *s | |
3717 | to the form needed by the environment. */ | |
7117c2d2 | 3718 | if (temporary_env) |
fdf670ea CR |
3719 | { |
3720 | tcxt = new_var_context ((char *)NULL, 0); | |
3721 | tcxt->table = temporary_env; | |
3722 | tcxt->down = shell_variables; | |
3723 | } | |
7117c2d2 | 3724 | else |
fdf670ea | 3725 | tcxt = shell_variables; |
7117c2d2 JA |
3726 | |
3727 | temp_array = make_var_export_array (tcxt); | |
d166f048 | 3728 | if (temp_array) |
7117c2d2 JA |
3729 | add_temp_array_to_env (temp_array, 0, 0); |
3730 | ||
3731 | if (tcxt != shell_variables) | |
fdf670ea | 3732 | free (tcxt); |
726f6388 | 3733 | |
f73dda09 JA |
3734 | #if defined (RESTRICTED_SHELL) |
3735 | /* Restricted shells may not export shell functions. */ | |
7117c2d2 | 3736 | temp_array = restricted ? (char **)0 : make_func_export_array (); |
f73dda09 | 3737 | #else |
7117c2d2 | 3738 | temp_array = make_func_export_array (); |
f73dda09 | 3739 | #endif |
d166f048 | 3740 | if (temp_array) |
7117c2d2 | 3741 | add_temp_array_to_env (temp_array, 0, 0); |
726f6388 JA |
3742 | |
3743 | array_needs_making = 0; | |
3744 | } | |
3745 | } | |
3746 | ||
b72432fd JA |
3747 | /* This is an efficiency hack. PWD and OLDPWD are auto-exported, so |
3748 | we will need to remake the exported environment every time we | |
3749 | change directories. `_' is always put into the environment for | |
3750 | every external command, so without special treatment it will always | |
3751 | cause the environment to be remade. | |
3752 | ||
3753 | If there is no other reason to make the exported environment, we can | |
3754 | just update the variables in place and mark the exported environment | |
3755 | as no longer needing a remake. */ | |
3756 | void | |
3757 | update_export_env_inplace (env_prefix, preflen, value) | |
3758 | char *env_prefix; | |
3759 | int preflen; | |
3760 | char *value; | |
3761 | { | |
3762 | char *evar; | |
3763 | ||
f73dda09 | 3764 | evar = (char *)xmalloc (STRLEN (value) + preflen + 1); |
b72432fd JA |
3765 | strcpy (evar, env_prefix); |
3766 | if (value) | |
3767 | strcpy (evar + preflen, value); | |
3768 | export_env = add_or_supercede_exported_var (evar, 0); | |
3769 | } | |
3770 | ||
726f6388 JA |
3771 | /* We always put _ in the environment as the name of this command. */ |
3772 | void | |
3773 | put_command_name_into_env (command_name) | |
3774 | char *command_name; | |
3775 | { | |
b72432fd | 3776 | update_export_env_inplace ("_=", 2, command_name); |
726f6388 JA |
3777 | } |
3778 | ||
cce855bc | 3779 | #if 0 /* UNUSED -- it caused too many problems */ |
ccc6cda3 JA |
3780 | void |
3781 | put_gnu_argv_flags_into_env (pid, flags_string) | |
7117c2d2 | 3782 | intmax_t pid; |
ccc6cda3 JA |
3783 | char *flags_string; |
3784 | { | |
3785 | char *dummy, *pbuf; | |
3786 | int l, fl; | |
3787 | ||
3788 | pbuf = itos (pid); | |
3789 | l = strlen (pbuf); | |
3790 | ||
3791 | fl = strlen (flags_string); | |
3792 | ||
f73dda09 | 3793 | dummy = (char *)xmalloc (l + fl + 30); |
ccc6cda3 JA |
3794 | dummy[0] = '_'; |
3795 | strcpy (dummy + 1, pbuf); | |
3796 | strcpy (dummy + 1 + l, "_GNU_nonoption_argv_flags_"); | |
3797 | dummy[l + 27] = '='; | |
3798 | strcpy (dummy + l + 28, flags_string); | |
3799 | ||
3800 | free (pbuf); | |
3801 | ||
d166f048 | 3802 | export_env = add_or_supercede_exported_var (dummy, 0); |
ccc6cda3 | 3803 | } |
cce855bc | 3804 | #endif |
726f6388 | 3805 | |
7117c2d2 JA |
3806 | /* **************************************************************** */ |
3807 | /* */ | |
3808 | /* Managing variable contexts */ | |
3809 | /* */ | |
3810 | /* **************************************************************** */ | |
3811 | ||
3812 | /* Allocate and return a new variable context with NAME and FLAGS. | |
3813 | NAME can be NULL. */ | |
726f6388 | 3814 | |
7117c2d2 JA |
3815 | VAR_CONTEXT * |
3816 | new_var_context (name, flags) | |
3817 | char *name; | |
3818 | int flags; | |
3819 | { | |
3820 | VAR_CONTEXT *vc; | |
3821 | ||
3822 | vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT)); | |
3823 | vc->name = name ? savestring (name) : (char *)NULL; | |
3824 | vc->scope = variable_context; | |
3825 | vc->flags = flags; | |
3826 | ||
3827 | vc->up = vc->down = (VAR_CONTEXT *)NULL; | |
3828 | vc->table = (HASH_TABLE *)NULL; | |
3829 | ||
3830 | return vc; | |
3831 | } | |
3832 | ||
3833 | /* Free a variable context and its data, including the hash table. Dispose | |
3834 | all of the variables. */ | |
3835 | void | |
3836 | dispose_var_context (vc) | |
3837 | VAR_CONTEXT *vc; | |
3838 | { | |
3839 | FREE (vc->name); | |
3840 | ||
3841 | if (vc->table) | |
3842 | { | |
3843 | delete_all_variables (vc->table); | |
3844 | hash_dispose (vc->table); | |
3845 | } | |
3846 | ||
3847 | free (vc); | |
3848 | } | |
3849 | ||
3850 | /* Set VAR's scope level to the current variable context. */ | |
3851 | static int | |
3852 | set_context (var) | |
3853 | SHELL_VAR *var; | |
3854 | { | |
3855 | return (var->context = variable_context); | |
3856 | } | |
3857 | ||
3858 | /* Make a new variable context with NAME and FLAGS and a HASH_TABLE of | |
3859 | temporary variables, and push it onto shell_variables. This is | |
3860 | for shell functions. */ | |
3861 | VAR_CONTEXT * | |
3862 | push_var_context (name, flags, tempvars) | |
3863 | char *name; | |
3864 | int flags; | |
3865 | HASH_TABLE *tempvars; | |
3866 | { | |
3867 | VAR_CONTEXT *vc; | |
3868 | ||
3869 | vc = new_var_context (name, flags); | |
3870 | vc->table = tempvars; | |
3871 | if (tempvars) | |
3872 | { | |
3873 | /* Have to do this because the temp environment was created before | |
3874 | variable_context was incremented. */ | |
3875 | flatten (tempvars, set_context, (VARLIST *)NULL, 0); | |
3876 | vc->flags |= VC_HASTMPVAR; | |
3877 | } | |
3878 | vc->down = shell_variables; | |
3879 | shell_variables->up = vc; | |
3880 | ||
3881 | return (shell_variables = vc); | |
3882 | } | |
3883 | ||
3884 | static void | |
3885 | push_func_var (data) | |
3886 | PTR_T data; | |
3887 | { | |
3888 | SHELL_VAR *var, *v; | |
3889 | ||
3890 | var = (SHELL_VAR *)data; | |
3891 | ||
3892 | if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate))) | |
3893 | { | |
8991b5b0 CR |
3894 | /* Make sure we have a hash table to store the variable in while it is |
3895 | being propagated down to the global variables table. Create one if | |
3896 | we have to */ | |
3897 | if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0) | |
3898 | shell_variables->table = hash_create (0); | |
7117c2d2 | 3899 | /* XXX - should we set v->context here? */ |
d11b8b46 | 3900 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
7117c2d2 JA |
3901 | if (shell_variables == global_variables) |
3902 | var->attributes &= ~(att_tempvar|att_propagate); | |
3903 | else | |
fdf670ea | 3904 | shell_variables->flags |= VC_HASTMPVAR; |
7117c2d2 JA |
3905 | v->attributes |= var->attributes; |
3906 | } | |
4ac1ff98 CR |
3907 | else |
3908 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 JA |
3909 | |
3910 | dispose_variable (var); | |
3911 | } | |
3912 | ||
3913 | /* Pop the top context off of VCXT and dispose of it, returning the rest of | |
3914 | the stack. */ | |
3915 | void | |
3916 | pop_var_context () | |
3917 | { | |
3918 | VAR_CONTEXT *ret, *vcxt; | |
3919 | ||
3920 | vcxt = shell_variables; | |
3921 | if (vc_isfuncenv (vcxt) == 0) | |
3922 | { | |
5e13499c | 3923 | internal_error (_("pop_var_context: head of shell_variables not a function context")); |
7117c2d2 JA |
3924 | return; |
3925 | } | |
3926 | ||
3927 | if (ret = vcxt->down) | |
3928 | { | |
3929 | ret->up = (VAR_CONTEXT *)NULL; | |
3930 | shell_variables = ret; | |
3931 | if (vcxt->table) | |
3932 | hash_flush (vcxt->table, push_func_var); | |
3933 | dispose_var_context (vcxt); | |
3934 | } | |
3935 | else | |
5e13499c | 3936 | internal_error (_("pop_var_context: no global_variables context")); |
7117c2d2 JA |
3937 | } |
3938 | ||
3939 | /* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and | |
3940 | all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */ | |
3941 | void | |
3942 | delete_all_contexts (vcxt) | |
3943 | VAR_CONTEXT *vcxt; | |
3944 | { | |
3945 | VAR_CONTEXT *v, *t; | |
3946 | ||
3947 | for (v = vcxt; v != global_variables; v = t) | |
3948 | { | |
3949 | t = v->down; | |
3950 | dispose_var_context (v); | |
fdf670ea | 3951 | } |
7117c2d2 JA |
3952 | |
3953 | delete_all_variables (global_variables->table); | |
3954 | shell_variables = global_variables; | |
3955 | } | |
3956 | ||
3957 | /* **************************************************************** */ | |
3958 | /* */ | |
3959 | /* Pushing and Popping temporary variable scopes */ | |
3960 | /* */ | |
3961 | /* **************************************************************** */ | |
3962 | ||
3963 | VAR_CONTEXT * | |
3964 | push_scope (flags, tmpvars) | |
3965 | int flags; | |
3966 | HASH_TABLE *tmpvars; | |
3967 | { | |
3968 | return (push_var_context ((char *)NULL, flags, tmpvars)); | |
3969 | } | |
3970 | ||
3971 | static void | |
3972 | push_exported_var (data) | |
3973 | PTR_T data; | |
3974 | { | |
3975 | SHELL_VAR *var, *v; | |
3976 | ||
3977 | var = (SHELL_VAR *)data; | |
3978 | ||
3979 | /* If a temp var had its export attribute set, or it's marked to be | |
3980 | propagated, bind it in the previous scope before disposing it. */ | |
c3271763 CR |
3981 | /* XXX - This isn't exactly right, because all tempenv variables have the |
3982 | export attribute set. */ | |
3983 | #if 0 | |
7117c2d2 | 3984 | if (exported_p (var) || (var->attributes & att_propagate)) |
c3271763 CR |
3985 | #else |
3986 | if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate)) | |
3987 | #endif | |
7117c2d2 JA |
3988 | { |
3989 | var->attributes &= ~att_tempvar; /* XXX */ | |
d11b8b46 | 3990 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
7117c2d2 JA |
3991 | if (shell_variables == global_variables) |
3992 | var->attributes &= ~att_propagate; | |
3993 | v->attributes |= var->attributes; | |
3994 | } | |
4ac1ff98 CR |
3995 | else |
3996 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 JA |
3997 | |
3998 | dispose_variable (var); | |
3999 | } | |
4000 | ||
4001 | void | |
4002 | pop_scope (is_special) | |
4003 | int is_special; | |
4004 | { | |
4005 | VAR_CONTEXT *vcxt, *ret; | |
4006 | ||
4007 | vcxt = shell_variables; | |
4008 | if (vc_istempscope (vcxt) == 0) | |
4009 | { | |
5e13499c | 4010 | internal_error (_("pop_scope: head of shell_variables not a temporary environment scope")); |
7117c2d2 JA |
4011 | return; |
4012 | } | |
4013 | ||
4014 | ret = vcxt->down; | |
4015 | if (ret) | |
4016 | ret->up = (VAR_CONTEXT *)NULL; | |
4017 | ||
4018 | shell_variables = ret; | |
4019 | ||
4020 | /* Now we can take care of merging variables in VCXT into set of scopes | |
4021 | whose head is RET (shell_variables). */ | |
4022 | FREE (vcxt->name); | |
4023 | if (vcxt->table) | |
4024 | { | |
4025 | if (is_special) | |
4026 | hash_flush (vcxt->table, push_func_var); | |
4027 | else | |
4028 | hash_flush (vcxt->table, push_exported_var); | |
4029 | hash_dispose (vcxt->table); | |
4030 | } | |
4031 | free (vcxt); | |
4032 | ||
4033 | sv_ifs ("IFS"); /* XXX here for now */ | |
4034 | } | |
4035 | ||
4036 | /* **************************************************************** */ | |
4037 | /* */ | |
4038 | /* Pushing and Popping function contexts */ | |
4039 | /* */ | |
4040 | /* **************************************************************** */ | |
4041 | ||
4042 | static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL; | |
4043 | static int dollar_arg_stack_slots; | |
4044 | static int dollar_arg_stack_index; | |
4045 | ||
4046 | /* XXX - we might want to consider pushing and popping the `getopts' state | |
4047 | when we modify the positional parameters. */ | |
4048 | void | |
4049 | push_context (name, is_subshell, tempvars) | |
4050 | char *name; /* function name */ | |
4051 | int is_subshell; | |
4052 | HASH_TABLE *tempvars; | |
4053 | { | |
4054 | if (is_subshell == 0) | |
4055 | push_dollar_vars (); | |
4056 | variable_context++; | |
4057 | push_var_context (name, VC_FUNCENV, tempvars); | |
4058 | } | |
4059 | ||
4060 | /* Only called when subshell == 0, so we don't need to check, and can | |
4061 | unconditionally pop the dollar vars off the stack. */ | |
4062 | void | |
4063 | pop_context () | |
726f6388 | 4064 | { |
7117c2d2 JA |
4065 | pop_dollar_vars (); |
4066 | variable_context--; | |
4067 | pop_var_context (); | |
726f6388 | 4068 | |
7117c2d2 JA |
4069 | sv_ifs ("IFS"); /* XXX here for now */ |
4070 | } | |
726f6388 | 4071 | |
7117c2d2 JA |
4072 | /* Save the existing positional parameters on a stack. */ |
4073 | void | |
4074 | push_dollar_vars () | |
4075 | { | |
4076 | if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots) | |
4077 | { | |
4078 | dollar_arg_stack = (WORD_LIST **) | |
4079 | xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10) | |
631b20c6 | 4080 | * sizeof (WORD_LIST *)); |
7117c2d2 JA |
4081 | } |
4082 | dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args (); | |
4083 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
4084 | } | |
726f6388 | 4085 | |
7117c2d2 JA |
4086 | /* Restore the positional parameters from our stack. */ |
4087 | void | |
4088 | pop_dollar_vars () | |
4089 | { | |
4090 | if (!dollar_arg_stack || dollar_arg_stack_index == 0) | |
4091 | return; | |
726f6388 | 4092 | |
7117c2d2 JA |
4093 | remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1); |
4094 | dispose_words (dollar_arg_stack[dollar_arg_stack_index]); | |
4095 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
4096 | set_dollar_vars_unchanged (); | |
4097 | } | |
ccc6cda3 | 4098 | |
7117c2d2 JA |
4099 | void |
4100 | dispose_saved_dollar_vars () | |
4101 | { | |
4102 | if (!dollar_arg_stack || dollar_arg_stack_index == 0) | |
4103 | return; | |
726f6388 | 4104 | |
7117c2d2 JA |
4105 | dispose_words (dollar_arg_stack[dollar_arg_stack_index]); |
4106 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
726f6388 | 4107 | } |
cce855bc | 4108 | |
d3a24ed2 CR |
4109 | /* Manipulate the special BASH_ARGV and BASH_ARGC variables. */ |
4110 | ||
4111 | void | |
4112 | push_args (list) | |
4113 | WORD_LIST *list; | |
4114 | { | |
4115 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
4116 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
4117 | ARRAY *bash_argv_a, *bash_argc_a; | |
4118 | WORD_LIST *l; | |
4119 | arrayind_t i; | |
4120 | char *t; | |
4121 | ||
4122 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
4123 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
4124 | ||
4125 | for (l = list, i = 0; l; l = l->next, i++) | |
4126 | array_push (bash_argv_a, l->word->word); | |
4127 | ||
4128 | t = itos (i); | |
4129 | array_push (bash_argc_a, t); | |
4130 | free (t); | |
4131 | #endif /* ARRAY_VARS && DEBUGGER */ | |
4132 | } | |
4133 | ||
4134 | /* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC | |
4135 | array and use that value as the count of elements to remove from | |
4136 | BASH_ARGV. */ | |
4137 | void | |
4138 | pop_args () | |
4139 | { | |
4140 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
4141 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
4142 | ARRAY *bash_argv_a, *bash_argc_a; | |
4143 | ARRAY_ELEMENT *ce; | |
4144 | intmax_t i; | |
4145 | ||
4146 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
4147 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
4148 | ||
4149 | ce = array_shift (bash_argc_a, 1, 0); | |
4150 | if (ce == 0 || legal_number (element_value (ce), &i) == 0) | |
4151 | i = 0; | |
4152 | ||
4153 | for ( ; i > 0; i--) | |
4154 | array_pop (bash_argv_a); | |
4155 | array_dispose_element (ce); | |
4156 | #endif /* ARRAY_VARS && DEBUGGER */ | |
4157 | } | |
4158 | ||
cce855bc JA |
4159 | /************************************************* |
4160 | * * | |
4161 | * Functions to manage special variables * | |
4162 | * * | |
4163 | *************************************************/ | |
4164 | ||
4165 | /* Extern declarations for variables this code has to manage. */ | |
4166 | extern int eof_encountered, eof_encountered_limit, ignoreeof; | |
4167 | ||
4168 | #if defined (READLINE) | |
cce855bc JA |
4169 | extern int hostname_list_initialized; |
4170 | #endif | |
4171 | ||
4172 | /* An alist of name.function for each special variable. Most of the | |
4173 | functions don't do much, and in fact, this would be faster with a | |
4174 | switch statement, but by the end of this file, I am sick of switch | |
4175 | statements. */ | |
4176 | ||
4177 | #define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0 | |
4178 | ||
7117c2d2 | 4179 | /* This table will be sorted with qsort() the first time it's accessed. */ |
cce855bc JA |
4180 | struct name_and_function { |
4181 | char *name; | |
f73dda09 | 4182 | sh_sv_func_t *function; |
7117c2d2 | 4183 | }; |
cce855bc | 4184 | |
7117c2d2 | 4185 | static struct name_and_function special_vars[] = { |
691aebcb CR |
4186 | { "BASH_XTRACEFD", sv_xtracefd }, |
4187 | ||
227f982e | 4188 | #if defined (READLINE) |
ac58e8c8 CR |
4189 | # if defined (STRICT_POSIX) |
4190 | { "COLUMNS", sv_winsize }, | |
4191 | # endif | |
6e70dbff CR |
4192 | { "COMP_WORDBREAKS", sv_comp_wordbreaks }, |
4193 | #endif | |
4194 | ||
6faad625 CR |
4195 | { "FUNCNEST", sv_funcnest }, |
4196 | ||
cce855bc JA |
4197 | { "GLOBIGNORE", sv_globignore }, |
4198 | ||
cce855bc | 4199 | #if defined (HISTORY) |
7117c2d2 JA |
4200 | { "HISTCONTROL", sv_history_control }, |
4201 | { "HISTFILESIZE", sv_histsize }, | |
cce855bc JA |
4202 | { "HISTIGNORE", sv_histignore }, |
4203 | { "HISTSIZE", sv_histsize }, | |
d3a24ed2 | 4204 | { "HISTTIMEFORMAT", sv_histtimefmt }, |
7117c2d2 | 4205 | #endif |
cce855bc | 4206 | |
055a1bf5 CR |
4207 | #if defined (__CYGWIN__) |
4208 | { "HOME", sv_home }, | |
4209 | #endif | |
4210 | ||
7117c2d2 JA |
4211 | #if defined (READLINE) |
4212 | { "HOSTFILE", sv_hostfile }, | |
4213 | #endif | |
cce855bc | 4214 | |
7117c2d2 JA |
4215 | { "IFS", sv_ifs }, |
4216 | { "IGNOREEOF", sv_ignoreeof }, | |
cce855bc | 4217 | |
7117c2d2 | 4218 | { "LANG", sv_locale }, |
cce855bc JA |
4219 | { "LC_ALL", sv_locale }, |
4220 | { "LC_COLLATE", sv_locale }, | |
4221 | { "LC_CTYPE", sv_locale }, | |
4222 | { "LC_MESSAGES", sv_locale }, | |
bb70624e | 4223 | { "LC_NUMERIC", sv_locale }, |
898cc92e | 4224 | { "LC_TIME", sv_locale }, |
7117c2d2 | 4225 | |
ac58e8c8 CR |
4226 | #if defined (READLINE) && defined (STRICT_POSIX) |
4227 | { "LINES", sv_winsize }, | |
4228 | #endif | |
4229 | ||
7117c2d2 JA |
4230 | { "MAIL", sv_mail }, |
4231 | { "MAILCHECK", sv_mail }, | |
4232 | { "MAILPATH", sv_mail }, | |
4233 | ||
4234 | { "OPTERR", sv_opterr }, | |
4235 | { "OPTIND", sv_optind }, | |
4236 | ||
4237 | { "PATH", sv_path }, | |
4238 | { "POSIXLY_CORRECT", sv_strict_posix }, | |
4239 | ||
4240 | #if defined (READLINE) | |
4241 | { "TERM", sv_terminal }, | |
4242 | { "TERMCAP", sv_terminal }, | |
4243 | { "TERMINFO", sv_terminal }, | |
4244 | #endif /* READLINE */ | |
4245 | ||
4246 | { "TEXTDOMAIN", sv_locale }, | |
4247 | { "TEXTDOMAINDIR", sv_locale }, | |
cce855bc | 4248 | |
9c2db999 | 4249 | #if defined (HAVE_TZSET) |
cce855bc JA |
4250 | { "TZ", sv_tz }, |
4251 | #endif | |
4252 | ||
7117c2d2 JA |
4253 | #if defined (HISTORY) && defined (BANG_HISTORY) |
4254 | { "histchars", sv_histchars }, | |
4255 | #endif /* HISTORY && BANG_HISTORY */ | |
4256 | ||
4257 | { "ignoreeof", sv_ignoreeof }, | |
4258 | ||
f73dda09 | 4259 | { (char *)0, (sh_sv_func_t *)0 } |
cce855bc JA |
4260 | }; |
4261 | ||
7117c2d2 JA |
4262 | #define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1) |
4263 | ||
4264 | static int | |
4265 | sv_compare (sv1, sv2) | |
4266 | struct name_and_function *sv1, *sv2; | |
4267 | { | |
4268 | int r; | |
4269 | ||
4270 | if ((r = sv1->name[0] - sv2->name[0]) == 0) | |
4271 | r = strcmp (sv1->name, sv2->name); | |
4272 | return r; | |
4273 | } | |
4274 | ||
4275 | static inline int | |
4276 | find_special_var (name) | |
4277 | const char *name; | |
4278 | { | |
4279 | register int i, r; | |
4280 | ||
4281 | for (i = 0; special_vars[i].name; i++) | |
4282 | { | |
4283 | r = special_vars[i].name[0] - name[0]; | |
4284 | if (r == 0) | |
4285 | r = strcmp (special_vars[i].name, name); | |
4286 | if (r == 0) | |
4287 | return i; | |
4288 | else if (r > 0) | |
4289 | /* Can't match any of rest of elements in sorted list. Take this out | |
4290 | if it causes problems in certain environments. */ | |
fdf670ea | 4291 | break; |
7117c2d2 JA |
4292 | } |
4293 | return -1; | |
4294 | } | |
4295 | ||
cce855bc JA |
4296 | /* The variable in NAME has just had its state changed. Check to see if it |
4297 | is one of the special ones where something special happens. */ | |
4298 | void | |
4299 | stupidly_hack_special_variables (name) | |
4300 | char *name; | |
4301 | { | |
7117c2d2 | 4302 | static int sv_sorted = 0; |
cce855bc JA |
4303 | int i; |
4304 | ||
7117c2d2 | 4305 | if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */ |
cce855bc | 4306 | { |
7117c2d2 JA |
4307 | qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]), |
4308 | (QSFUNC *)sv_compare); | |
4309 | sv_sorted = 1; | |
cce855bc | 4310 | } |
7117c2d2 JA |
4311 | |
4312 | i = find_special_var (name); | |
4313 | if (i != -1) | |
4314 | (*(special_vars[i].function)) (name); | |
4315 | } | |
4316 | ||
33fe8777 CR |
4317 | /* Special variables that need hooks to be run when they are unset as part |
4318 | of shell reinitialization should have their sv_ functions run here. */ | |
4319 | void | |
4320 | reinit_special_variables () | |
4321 | { | |
4322 | #if defined (READLINE) | |
4323 | sv_comp_wordbreaks ("COMP_WORDBREAKS"); | |
4324 | #endif | |
4325 | sv_globignore ("GLOBIGNORE"); | |
4326 | sv_opterr ("OPTERR"); | |
4327 | } | |
4328 | ||
7117c2d2 JA |
4329 | void |
4330 | sv_ifs (name) | |
4331 | char *name; | |
4332 | { | |
4333 | SHELL_VAR *v; | |
4334 | ||
4335 | v = find_variable ("IFS"); | |
4336 | setifs (v); | |
cce855bc JA |
4337 | } |
4338 | ||
4339 | /* What to do just after the PATH variable has changed. */ | |
4340 | void | |
4341 | sv_path (name) | |
4342 | char *name; | |
4343 | { | |
4344 | /* hash -r */ | |
7117c2d2 | 4345 | phash_flush (); |
cce855bc JA |
4346 | } |
4347 | ||
4348 | /* What to do just after one of the MAILxxxx variables has changed. NAME | |
4349 | is the name of the variable. This is called with NAME set to one of | |
4350 | MAIL, MAILCHECK, or MAILPATH. */ | |
4351 | void | |
4352 | sv_mail (name) | |
4353 | char *name; | |
4354 | { | |
4355 | /* If the time interval for checking the files has changed, then | |
4356 | reset the mail timer. Otherwise, one of the pathname vars | |
4357 | to the users mailbox has changed, so rebuild the array of | |
4358 | filenames. */ | |
4359 | if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */ | |
4360 | reset_mail_timer (); | |
4361 | else | |
4362 | { | |
4363 | free_mail_files (); | |
4364 | remember_mail_dates (); | |
4365 | } | |
4366 | } | |
4367 | ||
6faad625 CR |
4368 | void |
4369 | sv_funcnest (name) | |
4370 | char *name; | |
4371 | { | |
4372 | SHELL_VAR *v; | |
4373 | intmax_t num; | |
4374 | ||
4375 | v = find_variable (name); | |
4376 | if (v == 0) | |
4377 | funcnest_max = 0; | |
4378 | else if (legal_number (value_cell (v), &num) == 0) | |
4379 | funcnest_max = 0; | |
4380 | else | |
4381 | funcnest_max = num; | |
4382 | } | |
4383 | ||
ac58e8c8 CR |
4384 | /* What to do when GLOBIGNORE changes. */ |
4385 | void | |
4386 | sv_globignore (name) | |
4387 | char *name; | |
4388 | { | |
e77a3058 CR |
4389 | if (privileged_mode == 0) |
4390 | setup_glob_ignore (name); | |
ac58e8c8 CR |
4391 | } |
4392 | ||
227f982e | 4393 | #if defined (READLINE) |
6e70dbff CR |
4394 | void |
4395 | sv_comp_wordbreaks (name) | |
4396 | char *name; | |
4397 | { | |
4398 | SHELL_VAR *sv; | |
4399 | ||
4400 | sv = find_variable (name); | |
4401 | if (sv == 0) | |
9614c166 | 4402 | reset_completer_word_break_chars (); |
6e70dbff | 4403 | } |
cce855bc | 4404 | |
cce855bc JA |
4405 | /* What to do just after one of the TERMxxx variables has changed. |
4406 | If we are an interactive shell, then try to reset the terminal | |
4407 | information in readline. */ | |
4408 | void | |
4409 | sv_terminal (name) | |
4410 | char *name; | |
4411 | { | |
4412 | if (interactive_shell && no_line_editing == 0) | |
4413 | rl_reset_terminal (get_string_value ("TERM")); | |
4414 | } | |
4415 | ||
4416 | void | |
4417 | sv_hostfile (name) | |
4418 | char *name; | |
4419 | { | |
bb70624e JA |
4420 | SHELL_VAR *v; |
4421 | ||
4422 | v = find_variable (name); | |
4423 | if (v == 0) | |
4424 | clear_hostname_list (); | |
4425 | else | |
4426 | hostname_list_initialized = 0; | |
cce855bc | 4427 | } |
ac58e8c8 CR |
4428 | |
4429 | #if defined (STRICT_POSIX) | |
4430 | /* In strict posix mode, we allow assignments to LINES and COLUMNS (and values | |
4431 | found in the initial environment) to override the terminal size reported by | |
4432 | the kernel. */ | |
4433 | void | |
4434 | sv_winsize (name) | |
4435 | char *name; | |
4436 | { | |
4437 | SHELL_VAR *v; | |
4438 | intmax_t xd; | |
4439 | int d; | |
4440 | ||
4441 | if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing) | |
4442 | return; | |
4443 | ||
4444 | v = find_variable (name); | |
4445 | if (v == 0 || var_isnull (v)) | |
4446 | rl_reset_screen_size (); | |
4447 | else | |
4448 | { | |
4449 | if (legal_number (value_cell (v), &xd) == 0) | |
4450 | return; | |
3d8cce26 | 4451 | winsize_assignment = 1; |
ac58e8c8 CR |
4452 | d = xd; /* truncate */ |
4453 | if (name[0] == 'L') /* LINES */ | |
4454 | rl_set_screen_size (d, -1); | |
4455 | else /* COLUMNS */ | |
4456 | rl_set_screen_size (-1, d); | |
4457 | winsize_assignment = 0; | |
4458 | } | |
4459 | } | |
4460 | #endif /* STRICT_POSIX */ | |
cce855bc JA |
4461 | #endif /* READLINE */ |
4462 | ||
055a1bf5 CR |
4463 | /* Update the value of HOME in the export environment so tilde expansion will |
4464 | work on cygwin. */ | |
4465 | #if defined (__CYGWIN__) | |
4466 | sv_home (name) | |
4467 | char *name; | |
4468 | { | |
4469 | array_needs_making = 1; | |
4470 | maybe_make_export_env (); | |
4471 | } | |
4472 | #endif | |
4473 | ||
cce855bc JA |
4474 | #if defined (HISTORY) |
4475 | /* What to do after the HISTSIZE or HISTFILESIZE variables change. | |
4476 | If there is a value for this HISTSIZE (and it is numeric), then stifle | |
4477 | the history. Otherwise, if there is NO value for this variable, | |
4478 | unstifle the history. If name is HISTFILESIZE, and its value is | |
4479 | numeric, truncate the history file to hold no more than that many | |
4480 | lines. */ | |
4481 | void | |
4482 | sv_histsize (name) | |
4483 | char *name; | |
4484 | { | |
4485 | char *temp; | |
7117c2d2 | 4486 | intmax_t num; |
f5635ecd | 4487 | int hmax; |
cce855bc JA |
4488 | |
4489 | temp = get_string_value (name); | |
4490 | ||
4491 | if (temp && *temp) | |
4492 | { | |
4493 | if (legal_number (temp, &num)) | |
28ef6c31 | 4494 | { |
dc8fbaf9 | 4495 | hmax = num; |
4b82d1cd CR |
4496 | if (hmax < 0 && name[4] == 'S') |
4497 | unstifle_history (); /* unstifle history if HISTSIZE < 0 */ | |
4498 | else if (name[4] == 'S') | |
cce855bc | 4499 | { |
f5635ecd | 4500 | stifle_history (hmax); |
dc8fbaf9 CR |
4501 | hmax = where_history (); |
4502 | if (history_lines_this_session > hmax) | |
4503 | history_lines_this_session = hmax; | |
cce855bc | 4504 | } |
4b82d1cd | 4505 | else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */ |
cce855bc | 4506 | { |
dc8fbaf9 CR |
4507 | history_truncate_file (get_string_value ("HISTFILE"), hmax); |
4508 | if (hmax <= history_lines_in_file) | |
4509 | history_lines_in_file = hmax; | |
cce855bc JA |
4510 | } |
4511 | } | |
4512 | } | |
4513 | else if (name[4] == 'S') | |
4514 | unstifle_history (); | |
4515 | } | |
4516 | ||
4517 | /* What to do after the HISTIGNORE variable changes. */ | |
4518 | void | |
4519 | sv_histignore (name) | |
4520 | char *name; | |
4521 | { | |
4522 | setup_history_ignore (name); | |
4523 | } | |
4524 | ||
4525 | /* What to do after the HISTCONTROL variable changes. */ | |
4526 | void | |
4527 | sv_history_control (name) | |
4528 | char *name; | |
4529 | { | |
4530 | char *temp; | |
d3a24ed2 CR |
4531 | char *val; |
4532 | int tptr; | |
cce855bc JA |
4533 | |
4534 | history_control = 0; | |
4535 | temp = get_string_value (name); | |
4536 | ||
d3a24ed2 CR |
4537 | if (temp == 0 || *temp == 0) |
4538 | return; | |
4539 | ||
4540 | tptr = 0; | |
4541 | while (val = extract_colon_unit (temp, &tptr)) | |
cce855bc | 4542 | { |
d3a24ed2 CR |
4543 | if (STREQ (val, "ignorespace")) |
4544 | history_control |= HC_IGNSPACE; | |
4545 | else if (STREQ (val, "ignoredups")) | |
4546 | history_control |= HC_IGNDUPS; | |
4547 | else if (STREQ (val, "ignoreboth")) | |
4548 | history_control |= HC_IGNBOTH; | |
4549 | else if (STREQ (val, "erasedups")) | |
4550 | history_control |= HC_ERASEDUPS; | |
4551 | ||
4552 | free (val); | |
cce855bc JA |
4553 | } |
4554 | } | |
4555 | ||
4556 | #if defined (BANG_HISTORY) | |
4557 | /* Setting/unsetting of the history expansion character. */ | |
4558 | void | |
4559 | sv_histchars (name) | |
4560 | char *name; | |
4561 | { | |
4562 | char *temp; | |
4563 | ||
4564 | temp = get_string_value (name); | |
4565 | if (temp) | |
4566 | { | |
4567 | history_expansion_char = *temp; | |
4568 | if (temp[0] && temp[1]) | |
4569 | { | |
4570 | history_subst_char = temp[1]; | |
4571 | if (temp[2]) | |
4572 | history_comment_char = temp[2]; | |
4573 | } | |
4574 | } | |
4575 | else | |
4576 | { | |
4577 | history_expansion_char = '!'; | |
4578 | history_subst_char = '^'; | |
4579 | history_comment_char = '#'; | |
4580 | } | |
4581 | } | |
4582 | #endif /* BANG_HISTORY */ | |
d3a24ed2 CR |
4583 | |
4584 | void | |
4585 | sv_histtimefmt (name) | |
4586 | char *name; | |
4587 | { | |
4588 | SHELL_VAR *v; | |
4589 | ||
4590 | v = find_variable (name); | |
4591 | history_write_timestamps = (v != 0); | |
4592 | } | |
cce855bc JA |
4593 | #endif /* HISTORY */ |
4594 | ||
9c2db999 | 4595 | #if defined (HAVE_TZSET) |
cce855bc JA |
4596 | void |
4597 | sv_tz (name) | |
4598 | char *name; | |
4599 | { | |
9c2db999 CR |
4600 | if (chkexport (name)) |
4601 | tzset (); | |
cce855bc JA |
4602 | } |
4603 | #endif | |
4604 | ||
4605 | /* If the variable exists, then the value of it can be the number | |
4606 | of times we actually ignore the EOF. The default is small, | |
4607 | (smaller than csh, anyway). */ | |
4608 | void | |
4609 | sv_ignoreeof (name) | |
4610 | char *name; | |
4611 | { | |
4612 | SHELL_VAR *tmp_var; | |
4613 | char *temp; | |
4614 | ||
4615 | eof_encountered = 0; | |
4616 | ||
4617 | tmp_var = find_variable (name); | |
4618 | ignoreeof = tmp_var != 0; | |
4619 | temp = tmp_var ? value_cell (tmp_var) : (char *)NULL; | |
4620 | if (temp) | |
4621 | eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10; | |
4622 | set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */ | |
4623 | } | |
4624 | ||
4625 | void | |
4626 | sv_optind (name) | |
4627 | char *name; | |
4628 | { | |
4629 | char *tt; | |
4630 | int s; | |
4631 | ||
4632 | tt = get_string_value ("OPTIND"); | |
4633 | if (tt && *tt) | |
4634 | { | |
4635 | s = atoi (tt); | |
4636 | ||
4637 | /* According to POSIX, setting OPTIND=1 resets the internal state | |
4638 | of getopt (). */ | |
4639 | if (s < 0 || s == 1) | |
4640 | s = 0; | |
4641 | } | |
4642 | else | |
4643 | s = 0; | |
4644 | getopts_reset (s); | |
4645 | } | |
4646 | ||
4647 | void | |
4648 | sv_opterr (name) | |
4649 | char *name; | |
4650 | { | |
4651 | char *tt; | |
4652 | ||
4653 | tt = get_string_value ("OPTERR"); | |
4654 | sh_opterr = (tt && *tt) ? atoi (tt) : 1; | |
4655 | } | |
4656 | ||
4657 | void | |
4658 | sv_strict_posix (name) | |
4659 | char *name; | |
4660 | { | |
4661 | SET_INT_VAR (name, posixly_correct); | |
4662 | posix_initialize (posixly_correct); | |
4663 | #if defined (READLINE) | |
4664 | if (interactive_shell) | |
4665 | posix_readline_initialize (posixly_correct); | |
4666 | #endif /* READLINE */ | |
4667 | set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */ | |
4668 | } | |
4669 | ||
4670 | void | |
4671 | sv_locale (name) | |
4672 | char *name; | |
4673 | { | |
4674 | char *v; | |
863d31ae | 4675 | int r; |
cce855bc JA |
4676 | |
4677 | v = get_string_value (name); | |
4678 | if (name[0] == 'L' && name[1] == 'A') /* LANG */ | |
863d31ae | 4679 | r = set_lang (name, v); |
cce855bc | 4680 | else |
863d31ae CR |
4681 | r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */ |
4682 | ||
4683 | #if 1 | |
4684 | if (r == 0 && posixly_correct) | |
4685 | last_command_exit_value = 1; | |
4686 | #endif | |
cce855bc JA |
4687 | } |
4688 | ||
4689 | #if defined (ARRAY_VARS) | |
4690 | void | |
7117c2d2 | 4691 | set_pipestatus_array (ps, nproc) |
cce855bc | 4692 | int *ps; |
7117c2d2 | 4693 | int nproc; |
cce855bc JA |
4694 | { |
4695 | SHELL_VAR *v; | |
4696 | ARRAY *a; | |
7117c2d2 | 4697 | ARRAY_ELEMENT *ae; |
cce855bc | 4698 | register int i; |
f73dda09 | 4699 | char *t, tbuf[INT_STRLEN_BOUND(int) + 1]; |
cce855bc JA |
4700 | |
4701 | v = find_variable ("PIPESTATUS"); | |
4702 | if (v == 0) | |
4703 | v = make_new_array_variable ("PIPESTATUS"); | |
4704 | if (array_p (v) == 0) | |
4705 | return; /* Do nothing if not an array variable. */ | |
4706 | a = array_cell (v); | |
7117c2d2 JA |
4707 | |
4708 | if (a == 0 || array_num_elements (a) == 0) | |
cce855bc | 4709 | { |
7117c2d2 JA |
4710 | for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */ |
4711 | { | |
4712 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
4713 | array_insert (a, i, t); | |
4714 | } | |
4715 | return; | |
4716 | } | |
4717 | ||
4718 | /* Fast case */ | |
4719 | if (array_num_elements (a) == nproc && nproc == 1) | |
4720 | { | |
4721 | ae = element_forw (a->head); | |
4722 | free (element_value (ae)); | |
4723 | ae->value = itos (ps[0]); | |
4724 | } | |
4725 | else if (array_num_elements (a) <= nproc) | |
4726 | { | |
4727 | /* modify in array_num_elements members in place, then add */ | |
4728 | ae = a->head; | |
4729 | for (i = 0; i < array_num_elements (a); i++) | |
4730 | { | |
4731 | ae = element_forw (ae); | |
4732 | free (element_value (ae)); | |
4733 | ae->value = itos (ps[i]); | |
4734 | } | |
4735 | /* add any more */ | |
4736 | for ( ; i < nproc; i++) | |
4737 | { | |
4738 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
4739 | array_insert (a, i, t); | |
4740 | } | |
4741 | } | |
4742 | else | |
4743 | { | |
4744 | /* deleting elements. it's faster to rebuild the array. */ | |
4745 | array_flush (a); | |
4746 | for (i = 0; ps[i] != -1; i++) | |
4747 | { | |
4748 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
4749 | array_insert (a, i, t); | |
4750 | } | |
cce855bc JA |
4751 | } |
4752 | } | |
64419627 CR |
4753 | |
4754 | ARRAY * | |
4755 | save_pipestatus_array () | |
4756 | { | |
4757 | SHELL_VAR *v; | |
4758 | ARRAY *a, *a2; | |
4759 | ||
4760 | v = find_variable ("PIPESTATUS"); | |
4761 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
4762 | return ((ARRAY *)NULL); | |
4763 | ||
4764 | a = array_cell (v); | |
4765 | a2 = array_copy (array_cell (v)); | |
4766 | ||
4767 | return a2; | |
4768 | } | |
4769 | ||
4770 | void | |
4771 | restore_pipestatus_array (a) | |
4772 | ARRAY *a; | |
4773 | { | |
4774 | SHELL_VAR *v; | |
4775 | ARRAY *a2; | |
4776 | ||
4777 | v = find_variable ("PIPESTATUS"); | |
4778 | /* XXX - should we still assign even if existing value is NULL? */ | |
4779 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
4780 | return; | |
4781 | ||
4782 | a2 = array_cell (v); | |
4783 | var_setarray (v, a); | |
4784 | ||
4785 | array_dispose (a2); | |
4786 | } | |
cce855bc JA |
4787 | #endif |
4788 | ||
4789 | void | |
4790 | set_pipestatus_from_exit (s) | |
4791 | int s; | |
4792 | { | |
4793 | #if defined (ARRAY_VARS) | |
4794 | static int v[2] = { 0, -1 }; | |
4795 | ||
4796 | v[0] = s; | |
7117c2d2 | 4797 | set_pipestatus_array (v, 1); |
cce855bc JA |
4798 | #endif |
4799 | } | |
691aebcb CR |
4800 | |
4801 | void | |
4802 | sv_xtracefd (name) | |
4803 | char *name; | |
4804 | { | |
4805 | SHELL_VAR *v; | |
4806 | char *t, *e; | |
4807 | int fd; | |
4808 | FILE *fp; | |
4809 | ||
4810 | v = find_variable (name); | |
4811 | if (v == 0) | |
4812 | { | |
4813 | xtrace_reset (); | |
4814 | return; | |
4815 | } | |
4816 | ||
4817 | t = value_cell (v); | |
4818 | if (t == 0 || *t == 0) | |
4819 | xtrace_reset (); | |
4820 | else | |
4821 | { | |
4822 | fd = (int)strtol (t, &e, 10); | |
4823 | if (e != t && *e == '\0' && sh_validfd (fd)) | |
4824 | { | |
4825 | fp = fdopen (fd, "w"); | |
4826 | if (fp == 0) | |
8f714a7c CR |
4827 | internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v)); |
4828 | else | |
4829 | xtrace_set (fd, fp); | |
691aebcb CR |
4830 | } |
4831 | else | |
8f714a7c | 4832 | internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v)); |
691aebcb CR |
4833 | } |
4834 | } |