]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* variables.c -- Functions for hacking shell variables. */ |
2 | ||
a0c0a00f | 3 | /* Copyright (C) 1987-2016 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
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 | |
3185942a JA |
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 | |
3185942a JA |
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 | |
3185942a JA |
27 | #if defined (__QNX__) |
28 | # if defined (__QNXNTO__) | |
29 | # include <sys/netmgr.h> | |
95732b49 JA |
30 | # else |
31 | # include <sys/vc.h> | |
3185942a JA |
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" |
3185942a JA |
41 | #if defined (HAVE_PWD_H) |
42 | # include <pwd.h> | |
43 | #endif | |
726f6388 | 44 | #include "bashansi.h" |
b80f6443 | 45 | #include "bashintl.h" |
ccc6cda3 | 46 | |
0001803f 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" | |
3185942a | 57 | #include "alias.h" |
ac50fbac CR |
58 | #include "jobs.h" |
59 | ||
60 | #include "version.h" | |
726f6388 | 61 | |
d166f048 | 62 | #include "builtins/getopt.h" |
726f6388 | 63 | #include "builtins/common.h" |
ac50fbac | 64 | #include "builtins/builtext.h" |
cce855bc JA |
65 | |
66 | #if defined (READLINE) | |
67 | # include "bashline.h" | |
68 | # include <readline/readline.h> | |
69 | #else | |
70 | # include <tilde/tilde.h> | |
71 | #endif | |
726f6388 | 72 | |
ccc6cda3 JA |
73 | #if defined (HISTORY) |
74 | # include "bashhist.h" | |
cce855bc | 75 | # include <readline/history.h> |
ccc6cda3 JA |
76 | #endif /* HISTORY */ |
77 | ||
bb70624e JA |
78 | #if defined (PROGRAMMABLE_COMPLETION) |
79 | # include "pcomplete.h" | |
80 | #endif | |
81 | ||
a0c0a00f CR |
82 | #define VARIABLES_HASH_BUCKETS 1024 /* must be power of two */ |
83 | #define FUNCTIONS_HASH_BUCKETS 512 | |
7117c2d2 JA |
84 | #define TEMPENV_HASH_BUCKETS 4 /* must be power of two */ |
85 | ||
3590145a CR |
86 | #define BASHFUNC_PREFIX "BASH_FUNC_" |
87 | #define BASHFUNC_PREFLEN 10 /* == strlen(BASHFUNC_PREFIX */ | |
88 | #define BASHFUNC_SUFFIX "%%" | |
89 | #define BASHFUNC_SUFFLEN 2 /* == strlen(BASHFUNC_SUFFIX) */ | |
90 | ||
a0c0a00f CR |
91 | /* flags for find_variable_internal */ |
92 | ||
93 | #define FV_FORCETEMPENV 0x01 | |
94 | #define FV_SKIPINVISIBLE 0x02 | |
95 | ||
95732b49 JA |
96 | extern char **environ; |
97 | ||
726f6388 JA |
98 | /* Variables used here and defined in other files. */ |
99 | extern int posixly_correct; | |
495aee44 | 100 | extern int line_number, line_number_base; |
b80f6443 | 101 | extern int subshell_environment, indirection_level, subshell_level; |
ccc6cda3 | 102 | extern int build_version, patch_level; |
b80f6443 | 103 | extern int expanding_redir; |
ac50fbac | 104 | extern int last_command_exit_value; |
ccc6cda3 | 105 | extern char *dist_version, *release_status; |
726f6388 JA |
106 | extern char *shell_name; |
107 | extern char *primary_prompt, *secondary_prompt; | |
ccc6cda3 | 108 | extern char *current_host_name; |
f73dda09 | 109 | extern sh_builtin_func_t *this_shell_builtin; |
bb70624e | 110 | extern SHELL_VAR *this_shell_function; |
b80f6443 | 111 | extern char *the_printed_command_except_trap; |
ccc6cda3 | 112 | extern char *this_command_name; |
b80f6443 | 113 | extern char *command_execution_string; |
726f6388 | 114 | extern time_t shell_start_time; |
3185942a JA |
115 | extern int assigning_in_environment; |
116 | extern int executing_builtin; | |
495aee44 | 117 | extern int funcnest_max; |
726f6388 | 118 | |
b80f6443 | 119 | #if defined (READLINE) |
95732b49 | 120 | extern int no_line_editing; |
b80f6443 JA |
121 | extern int perform_hostname_completion; |
122 | #endif | |
123 | ||
7117c2d2 JA |
124 | /* The list of shell variables that the user has created at the global |
125 | scope, or that came from the environment. */ | |
126 | VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL; | |
127 | ||
128 | /* The current list of shell variables, including function scopes */ | |
129 | VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL; | |
726f6388 JA |
130 | |
131 | /* The list of shell functions that the user has created, or that came from | |
132 | the environment. */ | |
133 | HASH_TABLE *shell_functions = (HASH_TABLE *)NULL; | |
134 | ||
b80f6443 JA |
135 | #if defined (DEBUGGER) |
136 | /* The table of shell function definitions that the user defined or that | |
137 | came from the environment. */ | |
138 | HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL; | |
139 | #endif | |
140 | ||
726f6388 JA |
141 | /* The current variable context. This is really a count of how deep into |
142 | executing functions we are. */ | |
143 | int variable_context = 0; | |
144 | ||
7117c2d2 | 145 | /* The set of shell assignments which are made only in the environment |
726f6388 | 146 | for a single command. */ |
7117c2d2 | 147 | HASH_TABLE *temporary_env = (HASH_TABLE *)NULL; |
726f6388 | 148 | |
b80f6443 JA |
149 | /* Set to non-zero if an assignment error occurs while putting variables |
150 | into the temporary environment. */ | |
151 | int tempenv_assign_error; | |
152 | ||
726f6388 JA |
153 | /* Some funky variables which are known about specially. Here is where |
154 | "$*", "$1", and all the cruft is kept. */ | |
155 | char *dollar_vars[10]; | |
156 | WORD_LIST *rest_of_args = (WORD_LIST *)NULL; | |
157 | ||
158 | /* The value of $$. */ | |
f73dda09 | 159 | pid_t dollar_dollar_pid; |
726f6388 | 160 | |
3185942a JA |
161 | /* Non-zero means that we have to remake EXPORT_ENV. */ |
162 | int array_needs_making = 1; | |
163 | ||
164 | /* The number of times BASH has been executed. This is set | |
165 | by initialize_variables (). */ | |
166 | int shell_level = 0; | |
167 | ||
726f6388 | 168 | /* An array which is passed to commands as their environment. It is |
d166f048 | 169 | manufactured from the union of the initial environment and the |
726f6388 JA |
170 | shell variables that are marked for export. */ |
171 | char **export_env = (char **)NULL; | |
d166f048 JA |
172 | static int export_env_index; |
173 | static int export_env_size; | |
726f6388 | 174 | |
95732b49 JA |
175 | #if defined (READLINE) |
176 | static int winsize_assignment; /* currently assigning to LINES or COLUMNS */ | |
95732b49 JA |
177 | #endif |
178 | ||
a0c0a00f CR |
179 | SHELL_VAR nameref_invalid_value; |
180 | static SHELL_VAR nameref_maxloop_value; | |
181 | ||
ac50fbac CR |
182 | static HASH_TABLE *last_table_searched; /* hash_lookup sets this */ |
183 | ||
726f6388 | 184 | /* Some forward declarations. */ |
0628567a JA |
185 | static void create_variable_tables __P((void)); |
186 | ||
f73dda09 JA |
187 | static void set_machine_vars __P((void)); |
188 | static void set_home_var __P((void)); | |
189 | static void set_shell_var __P((void)); | |
190 | static char *get_bash_name __P((void)); | |
191 | static void initialize_shell_level __P((void)); | |
192 | static void uidset __P((void)); | |
193 | #if defined (ARRAY_VARS) | |
194 | static void make_vers_array __P((void)); | |
195 | #endif | |
f73dda09 | 196 | |
3185942a | 197 | static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 198 | #if defined (ARRAY_VARS) |
3185942a | 199 | static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 200 | #endif |
b80f6443 JA |
201 | static SHELL_VAR *get_self __P((SHELL_VAR *)); |
202 | ||
203 | #if defined (ARRAY_VARS) | |
204 | static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int)); | |
3185942a | 205 | static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int)); |
b80f6443 | 206 | #endif |
7117c2d2 | 207 | |
3185942a | 208 | static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 JA |
209 | static SHELL_VAR *get_seconds __P((SHELL_VAR *)); |
210 | static SHELL_VAR *init_seconds_var __P((void)); | |
211 | ||
212 | static int brand __P((void)); | |
f73dda09 | 213 | static void sbrand __P((unsigned long)); /* set bash random number generator. */ |
3185942a JA |
214 | static void seedrand __P((void)); /* seed generator randomly */ |
215 | static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
7117c2d2 | 216 | static SHELL_VAR *get_random __P((SHELL_VAR *)); |
f73dda09 | 217 | |
3185942a | 218 | static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 219 | static SHELL_VAR *get_lineno __P((SHELL_VAR *)); |
f73dda09 | 220 | |
3185942a | 221 | static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *)); |
b80f6443 JA |
222 | static SHELL_VAR *get_subshell __P((SHELL_VAR *)); |
223 | ||
3185942a JA |
224 | static SHELL_VAR *get_bashpid __P((SHELL_VAR *)); |
225 | ||
7117c2d2 JA |
226 | #if defined (HISTORY) |
227 | static SHELL_VAR *get_histcmd __P((SHELL_VAR *)); | |
228 | #endif | |
229 | ||
3185942a JA |
230 | #if defined (READLINE) |
231 | static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *)); | |
232 | static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
233 | #endif | |
234 | ||
7117c2d2 | 235 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
3185942a | 236 | static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *)); |
7117c2d2 | 237 | static SHELL_VAR *get_dirstack __P((SHELL_VAR *)); |
7117c2d2 JA |
238 | #endif |
239 | ||
240 | #if defined (ARRAY_VARS) | |
241 | static SHELL_VAR *get_groupset __P((SHELL_VAR *)); | |
3185942a JA |
242 | |
243 | static SHELL_VAR *build_hashcmd __P((SHELL_VAR *)); | |
244 | static SHELL_VAR *get_hashcmd __P((SHELL_VAR *)); | |
245 | static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
0001803f | 246 | # if defined (ALIAS) |
3185942a JA |
247 | static SHELL_VAR *build_aliasvar __P((SHELL_VAR *)); |
248 | static SHELL_VAR *get_aliasvar __P((SHELL_VAR *)); | |
249 | static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *)); | |
0001803f | 250 | # endif |
7117c2d2 JA |
251 | #endif |
252 | ||
253 | static SHELL_VAR *get_funcname __P((SHELL_VAR *)); | |
254 | static SHELL_VAR *init_funcname_var __P((void)); | |
255 | ||
256 | static void initialize_dynamic_variables __P((void)); | |
257 | ||
258 | static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *)); | |
f73dda09 | 259 | static SHELL_VAR *new_shell_variable __P((const char *)); |
7117c2d2 | 260 | static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *)); |
95732b49 | 261 | static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int)); |
7117c2d2 | 262 | |
3185942a | 263 | static void dispose_variable_value __P((SHELL_VAR *)); |
7117c2d2 JA |
264 | static void free_variable_hash_data __P((PTR_T)); |
265 | ||
266 | static VARLIST *vlist_alloc __P((int)); | |
267 | static VARLIST *vlist_realloc __P((VARLIST *, int)); | |
268 | static void vlist_add __P((VARLIST *, SHELL_VAR *, int)); | |
269 | ||
270 | static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int)); | |
271 | ||
272 | static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **)); | |
f73dda09 | 273 | |
7117c2d2 JA |
274 | static SHELL_VAR **vapply __P((sh_var_map_func_t *)); |
275 | static SHELL_VAR **fapply __P((sh_var_map_func_t *)); | |
f73dda09 JA |
276 | |
277 | static int visible_var __P((SHELL_VAR *)); | |
f73dda09 | 278 | static int visible_and_exported __P((SHELL_VAR *)); |
89a92869 | 279 | static int export_environment_candidate __P((SHELL_VAR *)); |
7117c2d2 JA |
280 | static int local_and_exported __P((SHELL_VAR *)); |
281 | static int variable_in_context __P((SHELL_VAR *)); | |
f73dda09 JA |
282 | #if defined (ARRAY_VARS) |
283 | static int visible_array_vars __P((SHELL_VAR *)); | |
284 | #endif | |
285 | ||
a0c0a00f CR |
286 | static SHELL_VAR *find_variable_internal __P((const char *, int)); |
287 | ||
ac50fbac CR |
288 | static SHELL_VAR *find_nameref_at_context __P((SHELL_VAR *, VAR_CONTEXT *)); |
289 | static SHELL_VAR *find_variable_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **)); | |
290 | static SHELL_VAR *find_variable_last_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **)); | |
291 | ||
7117c2d2 JA |
292 | static SHELL_VAR *bind_tempenv_variable __P((const char *, char *)); |
293 | static void push_temp_var __P((PTR_T)); | |
294 | static void propagate_temp_var __P((PTR_T)); | |
295 | static void dispose_temporary_env __P((sh_free_func_t *)); | |
296 | ||
3590145a | 297 | static inline char *mk_env_string __P((const char *, const char *, int)); |
7117c2d2 JA |
298 | static char **make_env_array_from_var_list __P((SHELL_VAR **)); |
299 | static char **make_var_export_array __P((VAR_CONTEXT *)); | |
300 | static char **make_func_export_array __P((void)); | |
301 | static void add_temp_array_to_env __P((char **, int, int)); | |
f73dda09 | 302 | |
7117c2d2 JA |
303 | static int n_shell_variables __P((void)); |
304 | static int set_context __P((SHELL_VAR *)); | |
726f6388 | 305 | |
7117c2d2 JA |
306 | static void push_func_var __P((PTR_T)); |
307 | static void push_exported_var __P((PTR_T)); | |
726f6388 | 308 | |
7117c2d2 | 309 | static inline int find_special_var __P((const char *)); |
726f6388 | 310 | |
0628567a JA |
311 | static void |
312 | create_variable_tables () | |
313 | { | |
cce855bc | 314 | if (shell_variables == 0) |
7117c2d2 JA |
315 | { |
316 | shell_variables = global_variables = new_var_context ((char *)NULL, 0); | |
317 | shell_variables->scope = 0; | |
a0c0a00f | 318 | shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
7117c2d2 | 319 | } |
726f6388 | 320 | |
cce855bc | 321 | if (shell_functions == 0) |
a0c0a00f | 322 | shell_functions = hash_create (FUNCTIONS_HASH_BUCKETS); |
726f6388 | 323 | |
b80f6443 JA |
324 | #if defined (DEBUGGER) |
325 | if (shell_function_defs == 0) | |
a0c0a00f | 326 | shell_function_defs = hash_create (FUNCTIONS_HASH_BUCKETS); |
b80f6443 | 327 | #endif |
0628567a JA |
328 | } |
329 | ||
330 | /* Initialize the shell variables from the current environment. | |
331 | If PRIVMODE is nonzero, don't import functions from ENV or | |
332 | parse $SHELLOPTS. */ | |
333 | void | |
334 | initialize_shell_variables (env, privmode) | |
335 | char **env; | |
336 | int privmode; | |
337 | { | |
338 | char *name, *string, *temp_string; | |
ac50fbac | 339 | int c, char_index, string_index, string_length, ro; |
0628567a JA |
340 | SHELL_VAR *temp_var; |
341 | ||
342 | create_variable_tables (); | |
b80f6443 | 343 | |
a0c0a00f | 344 | for (string_index = 0; env && (string = env[string_index++]); ) |
726f6388 | 345 | { |
726f6388 | 346 | char_index = 0; |
d166f048 | 347 | name = string; |
726f6388 | 348 | while ((c = *string++) && c != '=') |
d166f048 JA |
349 | ; |
350 | if (string[-1] == '=') | |
28ef6c31 | 351 | char_index = string - name - 1; |
726f6388 | 352 | |
d166f048 JA |
353 | /* If there are weird things in the environment, like `=xxx' or a |
354 | string without an `=', just skip them. */ | |
355 | if (char_index == 0) | |
28ef6c31 | 356 | continue; |
d166f048 JA |
357 | |
358 | /* ASSERT(name[char_index] == '=') */ | |
726f6388 | 359 | name[char_index] = '\0'; |
d166f048 | 360 | /* Now, name = env variable name, string = env variable value, and |
28ef6c31 | 361 | char_index == strlen (name) */ |
726f6388 | 362 | |
3185942a JA |
363 | temp_var = (SHELL_VAR *)NULL; |
364 | ||
a0c0a00f | 365 | #if defined (FUNCTION_IMPORT) |
f73dda09 | 366 | /* If exported function, define it now. Don't import functions from |
7117c2d2 | 367 | the environment in privileged mode. */ |
3590145a CR |
368 | if (privmode == 0 && read_but_dont_execute == 0 && |
369 | STREQN (BASHFUNC_PREFIX, name, BASHFUNC_PREFLEN) && | |
370 | STREQ (BASHFUNC_SUFFIX, name + char_index - BASHFUNC_SUFFLEN) && | |
371 | STREQN ("() {", string, 4)) | |
726f6388 | 372 | { |
3590145a CR |
373 | size_t namelen; |
374 | char *tname; /* desired imported function name */ | |
375 | ||
376 | namelen = char_index - BASHFUNC_PREFLEN - BASHFUNC_SUFFLEN; | |
377 | ||
378 | tname = name + BASHFUNC_PREFLEN; /* start of func name */ | |
379 | tname[namelen] = '\0'; /* now tname == func name */ | |
380 | ||
d166f048 | 381 | string_length = strlen (string); |
3590145a | 382 | temp_string = (char *)xmalloc (namelen + string_length + 2); |
bb70624e | 383 | |
3590145a CR |
384 | memcpy (temp_string, tname, namelen); |
385 | temp_string[namelen] = ' '; | |
386 | memcpy (temp_string + namelen + 1, string, string_length + 1); | |
726f6388 | 387 | |
b64a0e1d | 388 | /* Don't import function names that are invalid identifiers from the |
a0c0a00f CR |
389 | environment in posix mode, though we still allow them to be defined as |
390 | shell variables. */ | |
3590145a CR |
391 | if (absolute_program (tname) == 0 && (posixly_correct == 0 || legal_identifier (tname))) |
392 | parse_and_execute (temp_string, tname, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD); | |
a0c0a00f CR |
393 | else |
394 | free (temp_string); /* parse_and_execute does this */ | |
726f6388 | 395 | |
3590145a | 396 | if (temp_var = find_function (tname)) |
726f6388 | 397 | { |
bb70624e | 398 | VSETATTR (temp_var, (att_exported|att_imported)); |
726f6388 JA |
399 | array_needs_making = 1; |
400 | } | |
401 | else | |
ac50fbac CR |
402 | { |
403 | if (temp_var = bind_variable (name, string, 0)) | |
404 | { | |
405 | VSETATTR (temp_var, (att_exported | att_imported | att_invisible)); | |
406 | array_needs_making = 1; | |
407 | } | |
408 | last_command_exit_value = 1; | |
3590145a | 409 | report_error (_("error importing function definition for `%s'"), tname); |
ac50fbac | 410 | } |
3590145a CR |
411 | |
412 | /* Restore original suffix */ | |
413 | tname[namelen] = BASHFUNC_SUFFIX[0]; | |
726f6388 | 414 | } |
a0c0a00f CR |
415 | else |
416 | #endif /* FUNCTION_IMPORT */ | |
ccc6cda3 | 417 | #if defined (ARRAY_VARS) |
ac50fbac | 418 | # if ARRAY_EXPORT |
ccc6cda3 | 419 | /* Array variables may not yet be exported. */ |
a0c0a00f | 420 | if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')') |
ccc6cda3 JA |
421 | { |
422 | string_length = 1; | |
423 | temp_string = extract_array_assignment_list (string, &string_length); | |
a0c0a00f | 424 | temp_var = assign_array_from_string (name, temp_string, 0); |
ccc6cda3 | 425 | FREE (temp_string); |
bb70624e | 426 | VSETATTR (temp_var, (att_exported | att_imported)); |
ccc6cda3 JA |
427 | array_needs_making = 1; |
428 | } | |
89a92869 | 429 | else |
a0c0a00f | 430 | # endif /* ARRAY_EXPORT */ |
89a92869 | 431 | #endif |
726f6388 | 432 | { |
ac50fbac CR |
433 | ro = 0; |
434 | if (posixly_correct && STREQ (name, "SHELLOPTS")) | |
435 | { | |
436 | temp_var = find_variable ("SHELLOPTS"); | |
437 | ro = temp_var && readonly_p (temp_var); | |
438 | if (temp_var) | |
439 | VUNSETATTR (temp_var, att_readonly); | |
440 | } | |
95732b49 | 441 | temp_var = bind_variable (name, string, 0); |
495aee44 CR |
442 | if (temp_var) |
443 | { | |
444 | if (legal_identifier (name)) | |
445 | VSETATTR (temp_var, (att_exported | att_imported)); | |
446 | else | |
447 | VSETATTR (temp_var, (att_exported | att_imported | att_invisible)); | |
ac50fbac CR |
448 | if (ro) |
449 | VSETATTR (temp_var, att_readonly); | |
495aee44 CR |
450 | array_needs_making = 1; |
451 | } | |
726f6388 | 452 | } |
d166f048 JA |
453 | |
454 | name[char_index] = '='; | |
bb70624e | 455 | /* temp_var can be NULL if it was an exported function with a syntax |
28ef6c31 | 456 | error (a different bug, but it still shouldn't dump core). */ |
bb70624e JA |
457 | if (temp_var && function_p (temp_var) == 0) /* XXX not yet */ |
458 | { | |
459 | CACHE_IMPORTSTR (temp_var, name); | |
460 | } | |
726f6388 JA |
461 | } |
462 | ||
28ef6c31 | 463 | set_pwd (); |
b72432fd | 464 | |
ccc6cda3 | 465 | /* Set up initial value of $_ */ |
95732b49 | 466 | temp_var = set_if_not ("_", dollar_vars[0]); |
ccc6cda3 | 467 | |
726f6388 | 468 | /* Remember this pid. */ |
f73dda09 | 469 | dollar_dollar_pid = getpid (); |
726f6388 JA |
470 | |
471 | /* Now make our own defaults in case the vars that we think are | |
472 | important are missing. */ | |
473 | temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE); | |
f73dda09 JA |
474 | #if 0 |
475 | set_auto_export (temp_var); /* XXX */ | |
476 | #endif | |
726f6388 JA |
477 | |
478 | temp_var = set_if_not ("TERM", "dumb"); | |
f73dda09 JA |
479 | #if 0 |
480 | set_auto_export (temp_var); /* XXX */ | |
481 | #endif | |
726f6388 | 482 | |
3185942a | 483 | #if defined (__QNX__) |
d166f048 JA |
484 | /* set node id -- don't import it from the environment */ |
485 | { | |
486 | char node_name[22]; | |
3185942a | 487 | # if defined (__QNXNTO__) |
95732b49 JA |
488 | netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name)); |
489 | # else | |
d166f048 | 490 | qnx_nidtostr (getnid (), node_name, sizeof (node_name)); |
95732b49 JA |
491 | # endif |
492 | temp_var = bind_variable ("NODE", node_name, 0); | |
a0c0a00f CR |
493 | if (temp_var) |
494 | set_auto_export (temp_var); | |
d166f048 JA |
495 | } |
496 | #endif | |
497 | ||
ccc6cda3 | 498 | /* set up the prompts. */ |
726f6388 JA |
499 | if (interactive_shell) |
500 | { | |
b72432fd | 501 | #if defined (PROMPT_STRING_DECODE) |
726f6388 | 502 | set_if_not ("PS1", primary_prompt); |
b72432fd JA |
503 | #else |
504 | if (current_user.uid == -1) | |
505 | get_current_user_info (); | |
506 | set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt); | |
507 | #endif | |
726f6388 JA |
508 | set_if_not ("PS2", secondary_prompt); |
509 | } | |
a0c0a00f CR |
510 | |
511 | if (current_user.euid == 0) | |
512 | bind_variable ("PS4", "+ ", 0); | |
513 | else | |
514 | set_if_not ("PS4", "+ "); | |
726f6388 | 515 | |
ccc6cda3 | 516 | /* Don't allow IFS to be imported from the environment. */ |
95732b49 | 517 | temp_var = bind_variable ("IFS", " \t\n", 0); |
7117c2d2 | 518 | setifs (temp_var); |
726f6388 JA |
519 | |
520 | /* Magic machine types. Pretty convenient. */ | |
f73dda09 | 521 | set_machine_vars (); |
726f6388 | 522 | |
ccc6cda3 JA |
523 | /* Default MAILCHECK for interactive shells. Defer the creation of a |
524 | default MAILPATH until the startup files are read, because MAIL | |
f73dda09 | 525 | names a mail file if MAILPATH is not set, and we should provide a |
ccc6cda3 | 526 | default only if neither is set. */ |
726f6388 | 527 | if (interactive_shell) |
95732b49 JA |
528 | { |
529 | temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60"); | |
530 | VSETATTR (temp_var, att_integer); | |
531 | } | |
726f6388 JA |
532 | |
533 | /* Do some things with shell level. */ | |
d166f048 | 534 | initialize_shell_level (); |
726f6388 | 535 | |
b72432fd | 536 | set_ppid (); |
726f6388 | 537 | |
726f6388 | 538 | /* Initialize the `getopts' stuff. */ |
95732b49 JA |
539 | temp_var = bind_variable ("OPTIND", "1", 0); |
540 | VSETATTR (temp_var, att_integer); | |
d166f048 | 541 | getopts_reset (0); |
95732b49 | 542 | bind_variable ("OPTERR", "1", 0); |
d166f048 JA |
543 | sh_opterr = 1; |
544 | ||
0628567a | 545 | if (login_shell == 1 && posixly_correct == 0) |
d166f048 | 546 | set_home_var (); |
726f6388 JA |
547 | |
548 | /* Get the full pathname to THIS shell, and set the BASH variable | |
549 | to it. */ | |
d166f048 | 550 | name = get_bash_name (); |
95732b49 | 551 | temp_var = bind_variable ("BASH", name, 0); |
ccc6cda3 JA |
552 | free (name); |
553 | ||
554 | /* Make the exported environment variable SHELL be the user's login | |
555 | shell. Note that the `tset' command looks at this variable | |
556 | to determine what style of commands to output; if it ends in "csh", | |
557 | then C-shell commands are output, else Bourne shell commands. */ | |
d166f048 | 558 | set_shell_var (); |
726f6388 JA |
559 | |
560 | /* Make a variable called BASH_VERSION which contains the version info. */ | |
95732b49 | 561 | bind_variable ("BASH_VERSION", shell_version_string (), 0); |
ccc6cda3 JA |
562 | #if defined (ARRAY_VARS) |
563 | make_vers_array (); | |
564 | #endif | |
726f6388 | 565 | |
b80f6443 | 566 | if (command_execution_string) |
95732b49 | 567 | bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0); |
b80f6443 | 568 | |
726f6388 JA |
569 | /* Find out if we're supposed to be in Posix.2 mode via an |
570 | environment variable. */ | |
571 | temp_var = find_variable ("POSIXLY_CORRECT"); | |
572 | if (!temp_var) | |
573 | temp_var = find_variable ("POSIX_PEDANTIC"); | |
574 | if (temp_var && imported_p (temp_var)) | |
575 | sv_strict_posix (temp_var->name); | |
576 | ||
577 | #if defined (HISTORY) | |
578 | /* Set history variables to defaults, and then do whatever we would | |
579 | do if the variable had just been set. Do this only in the case | |
580 | that we are remembering commands on the history list. */ | |
581 | if (remember_on_history) | |
582 | { | |
7117c2d2 | 583 | name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0); |
726f6388 JA |
584 | |
585 | set_if_not ("HISTFILE", name); | |
586 | free (name); | |
726f6388 JA |
587 | } |
588 | #endif /* HISTORY */ | |
589 | ||
590 | /* Seed the random number generator. */ | |
3185942a | 591 | seedrand (); |
726f6388 JA |
592 | |
593 | /* Handle some "special" variables that we may have inherited from a | |
594 | parent shell. */ | |
d166f048 JA |
595 | if (interactive_shell) |
596 | { | |
597 | temp_var = find_variable ("IGNOREEOF"); | |
598 | if (!temp_var) | |
599 | temp_var = find_variable ("ignoreeof"); | |
600 | if (temp_var && imported_p (temp_var)) | |
601 | sv_ignoreeof (temp_var->name); | |
602 | } | |
726f6388 JA |
603 | |
604 | #if defined (HISTORY) | |
605 | if (interactive_shell && remember_on_history) | |
606 | { | |
ccc6cda3 JA |
607 | sv_history_control ("HISTCONTROL"); |
608 | sv_histignore ("HISTIGNORE"); | |
3185942a | 609 | sv_histtimefmt ("HISTTIMEFORMAT"); |
726f6388 JA |
610 | } |
611 | #endif /* HISTORY */ | |
612 | ||
95732b49 JA |
613 | #if defined (READLINE) && defined (STRICT_POSIX) |
614 | /* POSIXLY_CORRECT will only be 1 here if the shell was compiled | |
615 | -DSTRICT_POSIX */ | |
616 | if (interactive_shell && posixly_correct && no_line_editing == 0) | |
617 | rl_prefer_env_winsize = 1; | |
618 | #endif /* READLINE && STRICT_POSIX */ | |
619 | ||
f73dda09 JA |
620 | /* |
621 | * 24 October 2001 | |
622 | * | |
623 | * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT | |
624 | * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in | |
625 | * isnetconn() to avoid running the startup files more often than wanted. | |
626 | * That will, of course, only work if the user's login shell is bash, so | |
627 | * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined | |
628 | * in config-top.h. | |
629 | */ | |
630 | #if 0 | |
bb70624e | 631 | temp_var = find_variable ("SSH_CLIENT"); |
28ef6c31 JA |
632 | if (temp_var && imported_p (temp_var)) |
633 | { | |
634 | VUNSETATTR (temp_var, att_exported); | |
635 | array_needs_making = 1; | |
636 | } | |
637 | temp_var = find_variable ("SSH2_CLIENT"); | |
bb70624e JA |
638 | if (temp_var && imported_p (temp_var)) |
639 | { | |
640 | VUNSETATTR (temp_var, att_exported); | |
641 | array_needs_making = 1; | |
642 | } | |
f73dda09 | 643 | #endif |
bb70624e | 644 | |
ccc6cda3 JA |
645 | /* Get the user's real and effective user ids. */ |
646 | uidset (); | |
647 | ||
495aee44 CR |
648 | temp_var = find_variable ("BASH_XTRACEFD"); |
649 | if (temp_var && imported_p (temp_var)) | |
650 | sv_xtracefd (temp_var->name); | |
651 | ||
a0c0a00f CR |
652 | sv_shcompat ("BASH_COMPAT"); |
653 | ||
654 | /* Allow FUNCNEST to be inherited from the environment. */ | |
655 | sv_funcnest ("FUNCNEST"); | |
656 | ||
726f6388 JA |
657 | /* Initialize the dynamic variables, and seed their values. */ |
658 | initialize_dynamic_variables (); | |
726f6388 JA |
659 | } |
660 | ||
7117c2d2 JA |
661 | /* **************************************************************** */ |
662 | /* */ | |
663 | /* Setting values for special shell variables */ | |
664 | /* */ | |
665 | /* **************************************************************** */ | |
666 | ||
f73dda09 JA |
667 | static void |
668 | set_machine_vars () | |
669 | { | |
670 | SHELL_VAR *temp_var; | |
671 | ||
672 | temp_var = set_if_not ("HOSTTYPE", HOSTTYPE); | |
673 | temp_var = set_if_not ("OSTYPE", OSTYPE); | |
674 | temp_var = set_if_not ("MACHTYPE", MACHTYPE); | |
675 | ||
676 | temp_var = set_if_not ("HOSTNAME", current_host_name); | |
677 | } | |
678 | ||
d166f048 JA |
679 | /* Set $HOME to the information in the password file if we didn't get |
680 | it from the environment. */ | |
b72432fd JA |
681 | |
682 | /* This function is not static so the tilde and readline libraries can | |
683 | use it. */ | |
684 | char * | |
28ef6c31 | 685 | sh_get_home_dir () |
b72432fd JA |
686 | { |
687 | if (current_user.home_dir == 0) | |
688 | get_current_user_info (); | |
689 | return current_user.home_dir; | |
690 | } | |
691 | ||
d166f048 JA |
692 | static void |
693 | set_home_var () | |
694 | { | |
695 | SHELL_VAR *temp_var; | |
696 | ||
697 | temp_var = find_variable ("HOME"); | |
698 | if (temp_var == 0) | |
95732b49 | 699 | temp_var = bind_variable ("HOME", sh_get_home_dir (), 0); |
f73dda09 | 700 | #if 0 |
bb70624e | 701 | VSETATTR (temp_var, att_exported); |
f73dda09 | 702 | #endif |
d166f048 JA |
703 | } |
704 | ||
705 | /* Set $SHELL to the user's login shell if it is not already set. Call | |
706 | get_current_user_info if we haven't already fetched the shell. */ | |
707 | static void | |
708 | set_shell_var () | |
709 | { | |
710 | SHELL_VAR *temp_var; | |
711 | ||
712 | temp_var = find_variable ("SHELL"); | |
713 | if (temp_var == 0) | |
714 | { | |
715 | if (current_user.shell == 0) | |
716 | get_current_user_info (); | |
95732b49 | 717 | temp_var = bind_variable ("SHELL", current_user.shell, 0); |
d166f048 | 718 | } |
f73dda09 | 719 | #if 0 |
bb70624e | 720 | VSETATTR (temp_var, att_exported); |
f73dda09 | 721 | #endif |
d166f048 JA |
722 | } |
723 | ||
724 | static char * | |
725 | get_bash_name () | |
726 | { | |
727 | char *name; | |
728 | ||
28ef6c31 | 729 | if ((login_shell == 1) && RELPATH(shell_name)) |
d166f048 JA |
730 | { |
731 | if (current_user.shell == 0) | |
28ef6c31 | 732 | get_current_user_info (); |
d166f048 JA |
733 | name = savestring (current_user.shell); |
734 | } | |
28ef6c31 | 735 | else if (ABSPATH(shell_name)) |
d166f048 JA |
736 | name = savestring (shell_name); |
737 | else if (shell_name[0] == '.' && shell_name[1] == '/') | |
738 | { | |
739 | /* Fast path for common case. */ | |
740 | char *cdir; | |
741 | int len; | |
742 | ||
743 | cdir = get_string_value ("PWD"); | |
28ef6c31 JA |
744 | if (cdir) |
745 | { | |
746 | len = strlen (cdir); | |
f73dda09 | 747 | name = (char *)xmalloc (len + strlen (shell_name) + 1); |
28ef6c31 JA |
748 | strcpy (name, cdir); |
749 | strcpy (name + len, shell_name + 1); | |
750 | } | |
751 | else | |
752 | name = savestring (shell_name); | |
d166f048 JA |
753 | } |
754 | else | |
755 | { | |
756 | char *tname; | |
757 | int s; | |
758 | ||
759 | tname = find_user_command (shell_name); | |
760 | ||
761 | if (tname == 0) | |
762 | { | |
763 | /* Try the current directory. If there is not an executable | |
764 | there, just punt and use the login shell. */ | |
765 | s = file_status (shell_name); | |
766 | if (s & FS_EXECABLE) | |
767 | { | |
768 | tname = make_absolute (shell_name, get_string_value ("PWD")); | |
769 | if (*shell_name == '.') | |
770 | { | |
28ef6c31 | 771 | name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); |
d166f048 JA |
772 | if (name == 0) |
773 | name = tname; | |
774 | else | |
775 | free (tname); | |
776 | } | |
777 | else | |
778 | name = tname; | |
779 | } | |
780 | else | |
781 | { | |
782 | if (current_user.shell == 0) | |
783 | get_current_user_info (); | |
784 | name = savestring (current_user.shell); | |
785 | } | |
786 | } | |
787 | else | |
788 | { | |
789 | name = full_pathname (tname); | |
790 | free (tname); | |
791 | } | |
792 | } | |
793 | ||
794 | return (name); | |
795 | } | |
796 | ||
726f6388 JA |
797 | void |
798 | adjust_shell_level (change) | |
799 | int change; | |
800 | { | |
d166f048 | 801 | char new_level[5], *old_SHLVL; |
7117c2d2 | 802 | intmax_t old_level; |
d166f048 | 803 | SHELL_VAR *temp_var; |
726f6388 JA |
804 | |
805 | old_SHLVL = get_string_value ("SHLVL"); | |
f73dda09 JA |
806 | if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0) |
807 | old_level = 0; | |
726f6388 JA |
808 | |
809 | shell_level = old_level + change; | |
810 | if (shell_level < 0) | |
811 | shell_level = 0; | |
a0c0a00f | 812 | else if (shell_level >= 1000) |
d166f048 | 813 | { |
b80f6443 | 814 | internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level); |
d166f048 JA |
815 | shell_level = 1; |
816 | } | |
817 | ||
818 | /* We don't need the full generality of itos here. */ | |
819 | if (shell_level < 10) | |
820 | { | |
821 | new_level[0] = shell_level + '0'; | |
822 | new_level[1] = '\0'; | |
823 | } | |
824 | else if (shell_level < 100) | |
825 | { | |
826 | new_level[0] = (shell_level / 10) + '0'; | |
827 | new_level[1] = (shell_level % 10) + '0'; | |
828 | new_level[2] = '\0'; | |
829 | } | |
830 | else if (shell_level < 1000) | |
831 | { | |
832 | new_level[0] = (shell_level / 100) + '0'; | |
833 | old_level = shell_level % 100; | |
834 | new_level[1] = (old_level / 10) + '0'; | |
835 | new_level[2] = (old_level % 10) + '0'; | |
836 | new_level[3] = '\0'; | |
837 | } | |
838 | ||
95732b49 | 839 | temp_var = bind_variable ("SHLVL", new_level, 0); |
d166f048 JA |
840 | set_auto_export (temp_var); |
841 | } | |
842 | ||
843 | static void | |
844 | initialize_shell_level () | |
845 | { | |
d166f048 | 846 | adjust_shell_level (1); |
726f6388 JA |
847 | } |
848 | ||
28ef6c31 JA |
849 | /* If we got PWD from the environment, update our idea of the current |
850 | working directory. In any case, make sure that PWD exists before | |
851 | checking it. It is possible for getcwd () to fail on shell startup, | |
852 | and in that case, PWD would be undefined. If this is an interactive | |
853 | login shell, see if $HOME is the current working directory, and if | |
854 | that's not the same string as $PWD, set PWD=$HOME. */ | |
855 | ||
856 | void | |
857 | set_pwd () | |
858 | { | |
859 | SHELL_VAR *temp_var, *home_var; | |
a0c0a00f | 860 | char *temp_string, *home_string, *current_dir; |
28ef6c31 JA |
861 | |
862 | home_var = find_variable ("HOME"); | |
863 | home_string = home_var ? value_cell (home_var) : (char *)NULL; | |
864 | ||
865 | temp_var = find_variable ("PWD"); | |
a0c0a00f | 866 | /* Follow posix rules for importing PWD */ |
28ef6c31 JA |
867 | if (temp_var && imported_p (temp_var) && |
868 | (temp_string = value_cell (temp_var)) && | |
a0c0a00f | 869 | temp_string[0] == '/' && |
28ef6c31 | 870 | same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL)) |
a0c0a00f CR |
871 | { |
872 | current_dir = sh_canonpath (temp_string, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); | |
873 | if (current_dir == 0) | |
874 | current_dir = get_working_directory ("shell_init"); | |
875 | else | |
876 | set_working_directory (current_dir); | |
877 | free (current_dir); | |
878 | } | |
28ef6c31 JA |
879 | else if (home_string && interactive_shell && login_shell && |
880 | same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL)) | |
881 | { | |
882 | set_working_directory (home_string); | |
95732b49 | 883 | temp_var = bind_variable ("PWD", home_string, 0); |
28ef6c31 JA |
884 | set_auto_export (temp_var); |
885 | } | |
886 | else | |
887 | { | |
888 | temp_string = get_working_directory ("shell-init"); | |
889 | if (temp_string) | |
890 | { | |
95732b49 | 891 | temp_var = bind_variable ("PWD", temp_string, 0); |
28ef6c31 JA |
892 | set_auto_export (temp_var); |
893 | free (temp_string); | |
894 | } | |
895 | } | |
896 | ||
897 | /* According to the Single Unix Specification, v2, $OLDPWD is an | |
a0c0a00f CR |
898 | `environment variable' and therefore should be auto-exported. If we |
899 | don't find OLDPWD in the environment, or it doesn't name a directory, | |
900 | make a dummy invisible variable for OLDPWD, and mark it as exported. */ | |
901 | temp_var = find_variable ("OLDPWD"); | |
902 | if (temp_var == 0 || value_cell (temp_var) == 0 || file_isdir (value_cell (temp_var)) == 0) | |
903 | { | |
904 | temp_var = bind_variable ("OLDPWD", (char *)NULL, 0); | |
905 | VSETATTR (temp_var, (att_exported | att_invisible)); | |
906 | } | |
28ef6c31 JA |
907 | } |
908 | ||
b72432fd JA |
909 | /* Make a variable $PPID, which holds the pid of the shell's parent. */ |
910 | void | |
911 | set_ppid () | |
912 | { | |
f73dda09 | 913 | char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name; |
b72432fd JA |
914 | SHELL_VAR *temp_var; |
915 | ||
f73dda09 | 916 | name = inttostr (getppid (), namebuf, sizeof(namebuf)); |
b72432fd JA |
917 | temp_var = find_variable ("PPID"); |
918 | if (temp_var) | |
bb70624e | 919 | VUNSETATTR (temp_var, (att_readonly | att_exported)); |
95732b49 | 920 | temp_var = bind_variable ("PPID", name, 0); |
bb70624e | 921 | VSETATTR (temp_var, (att_readonly | att_integer)); |
b72432fd JA |
922 | } |
923 | ||
ccc6cda3 JA |
924 | static void |
925 | uidset () | |
726f6388 | 926 | { |
f73dda09 | 927 | char buff[INT_STRLEN_BOUND(uid_t) + 1], *b; |
ccc6cda3 JA |
928 | register SHELL_VAR *v; |
929 | ||
b72432fd | 930 | b = inttostr (current_user.uid, buff, sizeof (buff)); |
ccc6cda3 | 931 | v = find_variable ("UID"); |
28ef6c31 JA |
932 | if (v == 0) |
933 | { | |
95732b49 | 934 | v = bind_variable ("UID", b, 0); |
28ef6c31 JA |
935 | VSETATTR (v, (att_readonly | att_integer)); |
936 | } | |
726f6388 | 937 | |
ccc6cda3 | 938 | if (current_user.euid != current_user.uid) |
b72432fd | 939 | b = inttostr (current_user.euid, buff, sizeof (buff)); |
726f6388 | 940 | |
ccc6cda3 | 941 | v = find_variable ("EUID"); |
28ef6c31 JA |
942 | if (v == 0) |
943 | { | |
95732b49 | 944 | v = bind_variable ("EUID", b, 0); |
28ef6c31 JA |
945 | VSETATTR (v, (att_readonly | att_integer)); |
946 | } | |
ccc6cda3 JA |
947 | } |
948 | ||
949 | #if defined (ARRAY_VARS) | |
950 | static void | |
951 | make_vers_array () | |
952 | { | |
953 | SHELL_VAR *vv; | |
954 | ARRAY *av; | |
f73dda09 | 955 | char *s, d[32], b[INT_STRLEN_BOUND(int) + 1]; |
ccc6cda3 | 956 | |
a0c0a00f | 957 | unbind_variable_noref ("BASH_VERSINFO"); |
ccc6cda3 JA |
958 | |
959 | vv = make_new_array_variable ("BASH_VERSINFO"); | |
960 | av = array_cell (vv); | |
961 | strcpy (d, dist_version); | |
0001803f | 962 | s = strchr (d, '.'); |
ccc6cda3 JA |
963 | if (s) |
964 | *s++ = '\0'; | |
7117c2d2 JA |
965 | array_insert (av, 0, d); |
966 | array_insert (av, 1, s); | |
f73dda09 | 967 | s = inttostr (patch_level, b, sizeof (b)); |
7117c2d2 | 968 | array_insert (av, 2, s); |
f73dda09 | 969 | s = inttostr (build_version, b, sizeof (b)); |
7117c2d2 JA |
970 | array_insert (av, 3, s); |
971 | array_insert (av, 4, release_status); | |
972 | array_insert (av, 5, MACHTYPE); | |
ccc6cda3 | 973 | |
bb70624e | 974 | VSETATTR (vv, att_readonly); |
ccc6cda3 JA |
975 | } |
976 | #endif /* ARRAY_VARS */ | |
977 | ||
978 | /* Set the environment variables $LINES and $COLUMNS in response to | |
979 | a window size change. */ | |
980 | void | |
28ef6c31 | 981 | sh_set_lines_and_columns (lines, cols) |
ccc6cda3 JA |
982 | int lines, cols; |
983 | { | |
f73dda09 | 984 | char val[INT_STRLEN_BOUND(int) + 1], *v; |
ccc6cda3 | 985 | |
0628567a | 986 | #if defined (READLINE) |
95732b49 JA |
987 | /* If we are currently assigning to LINES or COLUMNS, don't do anything. */ |
988 | if (winsize_assignment) | |
989 | return; | |
0628567a | 990 | #endif |
95732b49 | 991 | |
b72432fd | 992 | v = inttostr (lines, val, sizeof (val)); |
95732b49 | 993 | bind_variable ("LINES", v, 0); |
ccc6cda3 | 994 | |
b72432fd | 995 | v = inttostr (cols, val, sizeof (val)); |
95732b49 | 996 | bind_variable ("COLUMNS", v, 0); |
726f6388 JA |
997 | } |
998 | ||
7117c2d2 JA |
999 | /* **************************************************************** */ |
1000 | /* */ | |
1001 | /* Printing variables and values */ | |
1002 | /* */ | |
1003 | /* **************************************************************** */ | |
726f6388 | 1004 | |
28ef6c31 JA |
1005 | /* Print LIST (a list of shell variables) to stdout in such a way that |
1006 | they can be read back in. */ | |
726f6388 JA |
1007 | void |
1008 | print_var_list (list) | |
1009 | register SHELL_VAR **list; | |
1010 | { | |
1011 | register int i; | |
1012 | register SHELL_VAR *var; | |
1013 | ||
1014 | for (i = 0; list && (var = list[i]); i++) | |
7117c2d2 | 1015 | if (invisible_p (var) == 0) |
726f6388 JA |
1016 | print_assignment (var); |
1017 | } | |
1018 | ||
28ef6c31 JA |
1019 | /* Print LIST (a list of shell functions) to stdout in such a way that |
1020 | they can be read back in. */ | |
1021 | void | |
1022 | print_func_list (list) | |
1023 | register SHELL_VAR **list; | |
1024 | { | |
1025 | register int i; | |
1026 | register SHELL_VAR *var; | |
1027 | ||
1028 | for (i = 0; list && (var = list[i]); i++) | |
1029 | { | |
1030 | printf ("%s ", var->name); | |
1031 | print_var_function (var); | |
1032 | printf ("\n"); | |
1033 | } | |
1034 | } | |
1035 | ||
726f6388 JA |
1036 | /* Print the value of a single SHELL_VAR. No newline is |
1037 | output, but the variable is printed in such a way that | |
1038 | it can be read back in. */ | |
1039 | void | |
1040 | print_assignment (var) | |
1041 | SHELL_VAR *var; | |
1042 | { | |
7117c2d2 JA |
1043 | if (var_isset (var) == 0) |
1044 | return; | |
1045 | ||
1046 | if (function_p (var)) | |
726f6388 | 1047 | { |
28ef6c31 | 1048 | printf ("%s", var->name); |
726f6388 JA |
1049 | print_var_function (var); |
1050 | printf ("\n"); | |
1051 | } | |
ccc6cda3 | 1052 | #if defined (ARRAY_VARS) |
7117c2d2 | 1053 | else if (array_p (var)) |
ccc6cda3 | 1054 | print_array_assignment (var, 0); |
3185942a JA |
1055 | else if (assoc_p (var)) |
1056 | print_assoc_assignment (var, 0); | |
ccc6cda3 | 1057 | #endif /* ARRAY_VARS */ |
7117c2d2 | 1058 | else |
726f6388 JA |
1059 | { |
1060 | printf ("%s=", var->name); | |
ccc6cda3 | 1061 | print_var_value (var, 1); |
726f6388 JA |
1062 | printf ("\n"); |
1063 | } | |
1064 | } | |
1065 | ||
1066 | /* Print the value cell of VAR, a shell variable. Do not print | |
ccc6cda3 JA |
1067 | the name, nor leading/trailing newline. If QUOTE is non-zero, |
1068 | and the value contains shell metacharacters, quote the value | |
1069 | in such a way that it can be read back in. */ | |
726f6388 | 1070 | void |
ccc6cda3 | 1071 | print_var_value (var, quote) |
726f6388 | 1072 | SHELL_VAR *var; |
ccc6cda3 | 1073 | int quote; |
726f6388 | 1074 | { |
ccc6cda3 JA |
1075 | char *t; |
1076 | ||
7117c2d2 JA |
1077 | if (var_isset (var) == 0) |
1078 | return; | |
1079 | ||
1080 | if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var))) | |
ccc6cda3 | 1081 | { |
7117c2d2 JA |
1082 | t = ansic_quote (value_cell (var), 0, (int *)0); |
1083 | printf ("%s", t); | |
1084 | free (t); | |
1085 | } | |
1086 | else if (quote && sh_contains_shell_metas (value_cell (var))) | |
1087 | { | |
1088 | t = sh_single_quote (value_cell (var)); | |
1089 | printf ("%s", t); | |
1090 | free (t); | |
ccc6cda3 | 1091 | } |
7117c2d2 JA |
1092 | else |
1093 | printf ("%s", value_cell (var)); | |
726f6388 JA |
1094 | } |
1095 | ||
1096 | /* Print the function cell of VAR, a shell variable. Do not | |
1097 | print the name, nor leading/trailing newline. */ | |
1098 | void | |
1099 | print_var_function (var) | |
1100 | SHELL_VAR *var; | |
1101 | { | |
3185942a JA |
1102 | char *x; |
1103 | ||
7117c2d2 | 1104 | if (function_p (var) && var_isset (var)) |
3185942a JA |
1105 | { |
1106 | x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL); | |
1107 | printf ("%s", x); | |
1108 | } | |
726f6388 JA |
1109 | } |
1110 | ||
1111 | /* **************************************************************** */ | |
ccc6cda3 | 1112 | /* */ |
7117c2d2 | 1113 | /* Dynamic Variables */ |
ccc6cda3 | 1114 | /* */ |
726f6388 JA |
1115 | /* **************************************************************** */ |
1116 | ||
1117 | /* DYNAMIC VARIABLES | |
ccc6cda3 | 1118 | |
726f6388 JA |
1119 | These are variables whose values are generated anew each time they are |
1120 | referenced. These are implemented using a pair of function pointers | |
7117c2d2 JA |
1121 | in the struct variable: assign_func, which is called from bind_variable |
1122 | and, if arrays are compiled into the shell, some of the functions in | |
1123 | arrayfunc.c, and dynamic_value, which is called from find_variable. | |
1124 | ||
1125 | assign_func is called from bind_variable_internal, if | |
1126 | bind_variable_internal discovers that the variable being assigned to | |
1127 | has such a function. The function is called as | |
1128 | SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind) | |
726f6388 | 1129 | and the (SHELL_VAR *)temp is returned as the value of bind_variable. It |
7117c2d2 JA |
1130 | is usually ENTRY (self). IND is an index for an array variable, and |
1131 | unused otherwise. | |
ccc6cda3 | 1132 | |
7117c2d2 JA |
1133 | dynamic_value is called from find_variable_internal to return a `new' |
1134 | value for the specified dynamic varible. If this function is NULL, | |
1135 | the variable is treated as a `normal' shell variable. If it is not, | |
1136 | however, then this function is called like this: | |
1137 | tempvar = (*(var->dynamic_value)) (var); | |
ccc6cda3 | 1138 | |
726f6388 JA |
1139 | Sometimes `tempvar' will replace the value of `var'. Other times, the |
1140 | shell will simply use the string value. Pretty object-oriented, huh? | |
ccc6cda3 | 1141 | |
726f6388 JA |
1142 | Be warned, though: if you `unset' a special variable, it loses its |
1143 | special meaning, even if you subsequently set it. | |
ccc6cda3 | 1144 | |
726f6388 | 1145 | The special assignment code would probably have been better put in |
7117c2d2 | 1146 | subst.c: do_assignment_internal, in the same style as |
726f6388 JA |
1147 | stupidly_hack_special_variables, but I wanted the changes as |
1148 | localized as possible. */ | |
1149 | ||
f73dda09 JA |
1150 | #define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \ |
1151 | do \ | |
1152 | { \ | |
95732b49 | 1153 | v = bind_variable (var, (val), 0); \ |
f73dda09 JA |
1154 | v->dynamic_value = gfunc; \ |
1155 | v->assign_func = afunc; \ | |
1156 | } \ | |
1157 | while (0) | |
1158 | ||
1159 | #define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \ | |
1160 | do \ | |
1161 | { \ | |
1162 | v = make_new_array_variable (var); \ | |
1163 | v->dynamic_value = gfunc; \ | |
1164 | v->assign_func = afunc; \ | |
1165 | } \ | |
1166 | while (0) | |
1167 | ||
3185942a JA |
1168 | #define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \ |
1169 | do \ | |
1170 | { \ | |
1171 | v = make_new_assoc_variable (var); \ | |
1172 | v->dynamic_value = gfunc; \ | |
1173 | v->assign_func = afunc; \ | |
1174 | } \ | |
1175 | while (0) | |
1176 | ||
bb70624e | 1177 | static SHELL_VAR * |
3185942a | 1178 | null_assign (self, value, unused, key) |
bb70624e JA |
1179 | SHELL_VAR *self; |
1180 | char *value; | |
7117c2d2 | 1181 | arrayind_t unused; |
3185942a | 1182 | char *key; |
bb70624e JA |
1183 | { |
1184 | return (self); | |
1185 | } | |
1186 | ||
1187 | #if defined (ARRAY_VARS) | |
1188 | static SHELL_VAR * | |
3185942a | 1189 | null_array_assign (self, value, ind, key) |
bb70624e | 1190 | SHELL_VAR *self; |
bb70624e | 1191 | char *value; |
7117c2d2 | 1192 | arrayind_t ind; |
3185942a | 1193 | char *key; |
bb70624e JA |
1194 | { |
1195 | return (self); | |
1196 | } | |
1197 | #endif | |
1198 | ||
b80f6443 JA |
1199 | /* Degenerate `dynamic_value' function; just returns what's passed without |
1200 | manipulation. */ | |
1201 | static SHELL_VAR * | |
1202 | get_self (self) | |
1203 | SHELL_VAR *self; | |
1204 | { | |
1205 | return (self); | |
1206 | } | |
1207 | ||
1208 | #if defined (ARRAY_VARS) | |
ac50fbac | 1209 | /* A generic dynamic array variable initializer. Initialize array variable |
b80f6443 JA |
1210 | NAME with dynamic value function GETFUNC and assignment function SETFUNC. */ |
1211 | static SHELL_VAR * | |
1212 | init_dynamic_array_var (name, getfunc, setfunc, attrs) | |
1213 | char *name; | |
1214 | sh_var_value_func_t *getfunc; | |
1215 | sh_var_assign_func_t *setfunc; | |
1216 | int attrs; | |
1217 | { | |
1218 | SHELL_VAR *v; | |
1219 | ||
1220 | v = find_variable (name); | |
1221 | if (v) | |
1222 | return (v); | |
1223 | INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc); | |
1224 | if (attrs) | |
1225 | VSETATTR (v, attrs); | |
1226 | return v; | |
1227 | } | |
b80f6443 | 1228 | |
3185942a JA |
1229 | static SHELL_VAR * |
1230 | init_dynamic_assoc_var (name, getfunc, setfunc, attrs) | |
1231 | char *name; | |
1232 | sh_var_value_func_t *getfunc; | |
1233 | sh_var_assign_func_t *setfunc; | |
1234 | int attrs; | |
1235 | { | |
1236 | SHELL_VAR *v; | |
1237 | ||
1238 | v = find_variable (name); | |
1239 | if (v) | |
1240 | return (v); | |
1241 | INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc); | |
1242 | if (attrs) | |
1243 | VSETATTR (v, attrs); | |
1244 | return v; | |
1245 | } | |
1246 | #endif | |
b80f6443 | 1247 | |
726f6388 JA |
1248 | /* The value of $SECONDS. This is the number of seconds since shell |
1249 | invocation, or, the number of seconds since the last assignment + the | |
1250 | value of the last assignment. */ | |
7117c2d2 | 1251 | static intmax_t seconds_value_assigned; |
726f6388 JA |
1252 | |
1253 | static SHELL_VAR * | |
3185942a | 1254 | assign_seconds (self, value, unused, key) |
726f6388 JA |
1255 | SHELL_VAR *self; |
1256 | char *value; | |
7117c2d2 | 1257 | arrayind_t unused; |
3185942a | 1258 | char *key; |
726f6388 | 1259 | { |
f73dda09 JA |
1260 | if (legal_number (value, &seconds_value_assigned) == 0) |
1261 | seconds_value_assigned = 0; | |
726f6388 JA |
1262 | shell_start_time = NOW; |
1263 | return (self); | |
1264 | } | |
1265 | ||
1266 | static SHELL_VAR * | |
1267 | get_seconds (var) | |
1268 | SHELL_VAR *var; | |
1269 | { | |
1270 | time_t time_since_start; | |
1271 | char *p; | |
1272 | ||
1273 | time_since_start = NOW - shell_start_time; | |
f73dda09 | 1274 | p = itos(seconds_value_assigned + time_since_start); |
726f6388 | 1275 | |
7117c2d2 | 1276 | FREE (value_cell (var)); |
726f6388 | 1277 | |
bb70624e | 1278 | VSETATTR (var, att_integer); |
7117c2d2 | 1279 | var_setvalue (var, p); |
726f6388 JA |
1280 | return (var); |
1281 | } | |
1282 | ||
f73dda09 JA |
1283 | static SHELL_VAR * |
1284 | init_seconds_var () | |
1285 | { | |
1286 | SHELL_VAR *v; | |
1287 | ||
1288 | v = find_variable ("SECONDS"); | |
1289 | if (v) | |
1290 | { | |
1291 | if (legal_number (value_cell(v), &seconds_value_assigned) == 0) | |
1292 | seconds_value_assigned = 0; | |
1293 | } | |
7117c2d2 | 1294 | INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds); |
f73dda09 JA |
1295 | return v; |
1296 | } | |
1297 | ||
726f6388 JA |
1298 | /* The random number seed. You can change this by setting RANDOM. */ |
1299 | static unsigned long rseed = 1; | |
f73dda09 | 1300 | static int last_random_value; |
95732b49 | 1301 | static int seeded_subshell = 0; |
726f6388 | 1302 | |
f73dda09 | 1303 | /* A linear congruential random number generator based on the example |
7117c2d2 | 1304 | one in the ANSI C standard. This one isn't very good, but a more |
f73dda09 | 1305 | complicated one is overkill. */ |
726f6388 JA |
1306 | |
1307 | /* Returns a pseudo-random number between 0 and 32767. */ | |
1308 | static int | |
1309 | brand () | |
1310 | { | |
3185942a JA |
1311 | /* From "Random number generators: good ones are hard to find", |
1312 | Park and Miller, Communications of the ACM, vol. 31, no. 10, | |
1313 | October 1988, p. 1195. filtered through FreeBSD */ | |
1314 | long h, l; | |
1315 | ||
495aee44 | 1316 | /* Can't seed with 0. */ |
3185942a | 1317 | if (rseed == 0) |
495aee44 | 1318 | rseed = 123459876; |
3185942a JA |
1319 | h = rseed / 127773; |
1320 | l = rseed % 127773; | |
1321 | rseed = 16807 * l - 2836 * h; | |
1322 | #if 0 | |
1323 | if (rseed < 0) | |
1324 | rseed += 0x7fffffff; | |
1325 | #endif | |
1326 | return ((unsigned int)(rseed & 32767)); /* was % 32768 */ | |
726f6388 JA |
1327 | } |
1328 | ||
1329 | /* Set the random number generator seed to SEED. */ | |
1330 | static void | |
1331 | sbrand (seed) | |
f73dda09 | 1332 | unsigned long seed; |
726f6388 JA |
1333 | { |
1334 | rseed = seed; | |
e8ce775d | 1335 | last_random_value = 0; |
726f6388 JA |
1336 | } |
1337 | ||
3185942a JA |
1338 | static void |
1339 | seedrand () | |
1340 | { | |
1341 | struct timeval tv; | |
1342 | ||
1343 | gettimeofday (&tv, NULL); | |
1344 | sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ()); | |
1345 | } | |
1346 | ||
726f6388 | 1347 | static SHELL_VAR * |
3185942a | 1348 | assign_random (self, value, unused, key) |
726f6388 JA |
1349 | SHELL_VAR *self; |
1350 | char *value; | |
7117c2d2 | 1351 | arrayind_t unused; |
3185942a | 1352 | char *key; |
726f6388 | 1353 | { |
f73dda09 | 1354 | sbrand (strtoul (value, (char **)NULL, 10)); |
95732b49 | 1355 | if (subshell_environment) |
3185942a | 1356 | seeded_subshell = getpid (); |
726f6388 JA |
1357 | return (self); |
1358 | } | |
1359 | ||
28ef6c31 JA |
1360 | int |
1361 | get_random_number () | |
726f6388 | 1362 | { |
3185942a | 1363 | int rv, pid; |
726f6388 | 1364 | |
ccc6cda3 | 1365 | /* Reset for command and process substitution. */ |
3185942a JA |
1366 | pid = getpid (); |
1367 | if (subshell_environment && seeded_subshell != pid) | |
95732b49 | 1368 | { |
3185942a JA |
1369 | seedrand (); |
1370 | seeded_subshell = pid; | |
95732b49 | 1371 | } |
ccc6cda3 JA |
1372 | |
1373 | do | |
1374 | rv = brand (); | |
f73dda09 | 1375 | while (rv == last_random_value); |
28ef6c31 JA |
1376 | return rv; |
1377 | } | |
ccc6cda3 | 1378 | |
28ef6c31 JA |
1379 | static SHELL_VAR * |
1380 | get_random (var) | |
1381 | SHELL_VAR *var; | |
1382 | { | |
1383 | int rv; | |
1384 | char *p; | |
1385 | ||
1386 | rv = get_random_number (); | |
ccc6cda3 | 1387 | last_random_value = rv; |
f73dda09 | 1388 | p = itos (rv); |
726f6388 | 1389 | |
7117c2d2 | 1390 | FREE (value_cell (var)); |
726f6388 | 1391 | |
bb70624e | 1392 | VSETATTR (var, att_integer); |
7117c2d2 | 1393 | var_setvalue (var, p); |
726f6388 JA |
1394 | return (var); |
1395 | } | |
1396 | ||
7117c2d2 | 1397 | static SHELL_VAR * |
3185942a | 1398 | assign_lineno (var, value, unused, key) |
7117c2d2 JA |
1399 | SHELL_VAR *var; |
1400 | char *value; | |
1401 | arrayind_t unused; | |
3185942a | 1402 | char *key; |
7117c2d2 JA |
1403 | { |
1404 | intmax_t new_value; | |
1405 | ||
1406 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1407 | new_value = 0; | |
495aee44 | 1408 | line_number = line_number_base = new_value; |
7117c2d2 JA |
1409 | return var; |
1410 | } | |
1411 | ||
726f6388 JA |
1412 | /* Function which returns the current line number. */ |
1413 | static SHELL_VAR * | |
1414 | get_lineno (var) | |
1415 | SHELL_VAR *var; | |
1416 | { | |
1417 | char *p; | |
ccc6cda3 | 1418 | int ln; |
726f6388 | 1419 | |
ccc6cda3 JA |
1420 | ln = executing_line_number (); |
1421 | p = itos (ln); | |
7117c2d2 JA |
1422 | FREE (value_cell (var)); |
1423 | var_setvalue (var, p); | |
726f6388 JA |
1424 | return (var); |
1425 | } | |
1426 | ||
b80f6443 | 1427 | static SHELL_VAR * |
3185942a | 1428 | assign_subshell (var, value, unused, key) |
b80f6443 JA |
1429 | SHELL_VAR *var; |
1430 | char *value; | |
1431 | arrayind_t unused; | |
3185942a | 1432 | char *key; |
b80f6443 JA |
1433 | { |
1434 | intmax_t new_value; | |
1435 | ||
1436 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1437 | new_value = 0; | |
1438 | subshell_level = new_value; | |
1439 | return var; | |
1440 | } | |
1441 | ||
1442 | static SHELL_VAR * | |
1443 | get_subshell (var) | |
1444 | SHELL_VAR *var; | |
1445 | { | |
1446 | char *p; | |
1447 | ||
1448 | p = itos (subshell_level); | |
1449 | FREE (value_cell (var)); | |
1450 | var_setvalue (var, p); | |
1451 | return (var); | |
1452 | } | |
1453 | ||
3185942a JA |
1454 | static SHELL_VAR * |
1455 | get_bashpid (var) | |
1456 | SHELL_VAR *var; | |
1457 | { | |
1458 | int pid; | |
1459 | char *p; | |
1460 | ||
1461 | pid = getpid (); | |
1462 | p = itos (pid); | |
1463 | ||
1464 | FREE (value_cell (var)); | |
1465 | VSETATTR (var, att_integer|att_readonly); | |
1466 | var_setvalue (var, p); | |
1467 | return (var); | |
1468 | } | |
1469 | ||
b80f6443 JA |
1470 | static SHELL_VAR * |
1471 | get_bash_command (var) | |
1472 | SHELL_VAR *var; | |
1473 | { | |
1474 | char *p; | |
1475 | ||
95732b49 JA |
1476 | if (the_printed_command_except_trap) |
1477 | p = savestring (the_printed_command_except_trap); | |
1478 | else | |
1479 | { | |
1480 | p = (char *)xmalloc (1); | |
1481 | p[0] = '\0'; | |
1482 | } | |
b80f6443 JA |
1483 | FREE (value_cell (var)); |
1484 | var_setvalue (var, p); | |
1485 | return (var); | |
1486 | } | |
1487 | ||
726f6388 JA |
1488 | #if defined (HISTORY) |
1489 | static SHELL_VAR * | |
1490 | get_histcmd (var) | |
1491 | SHELL_VAR *var; | |
1492 | { | |
1493 | char *p; | |
1494 | ||
1495 | p = itos (history_number ()); | |
7117c2d2 JA |
1496 | FREE (value_cell (var)); |
1497 | var_setvalue (var, p); | |
726f6388 JA |
1498 | return (var); |
1499 | } | |
1500 | #endif | |
1501 | ||
b80f6443 JA |
1502 | #if defined (READLINE) |
1503 | /* When this function returns, VAR->value points to malloced memory. */ | |
1504 | static SHELL_VAR * | |
1505 | get_comp_wordbreaks (var) | |
1506 | SHELL_VAR *var; | |
1507 | { | |
b80f6443 JA |
1508 | /* If we don't have anything yet, assign a default value. */ |
1509 | if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0) | |
1510 | enable_hostname_completion (perform_hostname_completion); | |
1511 | ||
3185942a JA |
1512 | FREE (value_cell (var)); |
1513 | var_setvalue (var, savestring (rl_completer_word_break_characters)); | |
b80f6443 JA |
1514 | |
1515 | return (var); | |
1516 | } | |
1517 | ||
1518 | /* When this function returns, rl_completer_word_break_characters points to | |
1519 | malloced memory. */ | |
1520 | static SHELL_VAR * | |
3185942a | 1521 | assign_comp_wordbreaks (self, value, unused, key) |
b80f6443 JA |
1522 | SHELL_VAR *self; |
1523 | char *value; | |
1524 | arrayind_t unused; | |
3185942a | 1525 | char *key; |
b80f6443 JA |
1526 | { |
1527 | if (rl_completer_word_break_characters && | |
1528 | rl_completer_word_break_characters != rl_basic_word_break_characters) | |
1529 | free (rl_completer_word_break_characters); | |
1530 | ||
1531 | rl_completer_word_break_characters = savestring (value); | |
1532 | return self; | |
1533 | } | |
1534 | #endif /* READLINE */ | |
1535 | ||
ccc6cda3 | 1536 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
b80f6443 | 1537 | static SHELL_VAR * |
3185942a | 1538 | assign_dirstack (self, value, ind, key) |
7117c2d2 JA |
1539 | SHELL_VAR *self; |
1540 | char *value; | |
1541 | arrayind_t ind; | |
3185942a | 1542 | char *key; |
7117c2d2 JA |
1543 | { |
1544 | set_dirstack_element (ind, 1, value); | |
1545 | return self; | |
1546 | } | |
1547 | ||
ccc6cda3 JA |
1548 | static SHELL_VAR * |
1549 | get_dirstack (self) | |
1550 | SHELL_VAR *self; | |
1551 | { | |
1552 | ARRAY *a; | |
1553 | WORD_LIST *l; | |
1554 | ||
0628567a | 1555 | l = get_directory_stack (0); |
7117c2d2 JA |
1556 | a = array_from_word_list (l); |
1557 | array_dispose (array_cell (self)); | |
d166f048 | 1558 | dispose_words (l); |
7117c2d2 | 1559 | var_setarray (self, a); |
ccc6cda3 JA |
1560 | return self; |
1561 | } | |
1562 | #endif /* PUSHD AND POPD && ARRAY_VARS */ | |
1563 | ||
d166f048 JA |
1564 | #if defined (ARRAY_VARS) |
1565 | /* We don't want to initialize the group set with a call to getgroups() | |
1566 | unless we're asked to, but we only want to do it once. */ | |
1567 | static SHELL_VAR * | |
1568 | get_groupset (self) | |
1569 | SHELL_VAR *self; | |
1570 | { | |
1571 | register int i; | |
1572 | int ng; | |
1573 | ARRAY *a; | |
1574 | static char **group_set = (char **)NULL; | |
1575 | ||
1576 | if (group_set == 0) | |
1577 | { | |
1578 | group_set = get_group_list (&ng); | |
1579 | a = array_cell (self); | |
1580 | for (i = 0; i < ng; i++) | |
7117c2d2 | 1581 | array_insert (a, i, group_set[i]); |
d166f048 JA |
1582 | } |
1583 | return (self); | |
1584 | } | |
3185942a JA |
1585 | |
1586 | static SHELL_VAR * | |
1587 | build_hashcmd (self) | |
1588 | SHELL_VAR *self; | |
1589 | { | |
1590 | HASH_TABLE *h; | |
1591 | int i; | |
1592 | char *k, *v; | |
1593 | BUCKET_CONTENTS *item; | |
1594 | ||
1595 | h = assoc_cell (self); | |
1596 | if (h) | |
1597 | assoc_dispose (h); | |
1598 | ||
1599 | if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0) | |
1600 | { | |
1601 | var_setvalue (self, (char *)NULL); | |
1602 | return self; | |
1603 | } | |
1604 | ||
1605 | h = assoc_create (hashed_filenames->nbuckets); | |
1606 | for (i = 0; i < hashed_filenames->nbuckets; i++) | |
1607 | { | |
1608 | for (item = hash_items (i, hashed_filenames); item; item = item->next) | |
1609 | { | |
1610 | k = savestring (item->key); | |
1611 | v = pathdata(item)->path; | |
1612 | assoc_insert (h, k, v); | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | var_setvalue (self, (char *)h); | |
1617 | return self; | |
1618 | } | |
1619 | ||
1620 | static SHELL_VAR * | |
1621 | get_hashcmd (self) | |
1622 | SHELL_VAR *self; | |
1623 | { | |
1624 | build_hashcmd (self); | |
1625 | return (self); | |
1626 | } | |
1627 | ||
1628 | static SHELL_VAR * | |
1629 | assign_hashcmd (self, value, ind, key) | |
1630 | SHELL_VAR *self; | |
1631 | char *value; | |
1632 | arrayind_t ind; | |
1633 | char *key; | |
1634 | { | |
a0c0a00f CR |
1635 | #if defined (RESTRICTED_SHELL) |
1636 | if (restricted && strchr (value, '/')) | |
1637 | { | |
1638 | sh_restricted (value); | |
1639 | return (SHELL_VAR *)NULL; | |
1640 | } | |
1641 | #endif | |
3185942a JA |
1642 | phash_insert (key, value, 0, 0); |
1643 | return (build_hashcmd (self)); | |
1644 | } | |
1645 | ||
0001803f | 1646 | #if defined (ALIAS) |
3185942a JA |
1647 | static SHELL_VAR * |
1648 | build_aliasvar (self) | |
1649 | SHELL_VAR *self; | |
1650 | { | |
1651 | HASH_TABLE *h; | |
1652 | int i; | |
1653 | char *k, *v; | |
1654 | BUCKET_CONTENTS *item; | |
1655 | ||
1656 | h = assoc_cell (self); | |
1657 | if (h) | |
1658 | assoc_dispose (h); | |
1659 | ||
1660 | if (aliases == 0 || HASH_ENTRIES (aliases) == 0) | |
1661 | { | |
1662 | var_setvalue (self, (char *)NULL); | |
1663 | return self; | |
1664 | } | |
1665 | ||
1666 | h = assoc_create (aliases->nbuckets); | |
1667 | for (i = 0; i < aliases->nbuckets; i++) | |
1668 | { | |
1669 | for (item = hash_items (i, aliases); item; item = item->next) | |
1670 | { | |
1671 | k = savestring (item->key); | |
1672 | v = ((alias_t *)(item->data))->value; | |
1673 | assoc_insert (h, k, v); | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | var_setvalue (self, (char *)h); | |
1678 | return self; | |
1679 | } | |
1680 | ||
1681 | static SHELL_VAR * | |
1682 | get_aliasvar (self) | |
1683 | SHELL_VAR *self; | |
1684 | { | |
1685 | build_aliasvar (self); | |
1686 | return (self); | |
1687 | } | |
1688 | ||
1689 | static SHELL_VAR * | |
1690 | assign_aliasvar (self, value, ind, key) | |
1691 | SHELL_VAR *self; | |
1692 | char *value; | |
1693 | arrayind_t ind; | |
1694 | char *key; | |
1695 | { | |
1696 | add_alias (key, value); | |
1697 | return (build_aliasvar (self)); | |
1698 | } | |
0001803f CR |
1699 | #endif /* ALIAS */ |
1700 | ||
d166f048 | 1701 | #endif /* ARRAY_VARS */ |
bb70624e | 1702 | |
b80f6443 JA |
1703 | /* If ARRAY_VARS is not defined, this just returns the name of any |
1704 | currently-executing function. If we have arrays, it's a call stack. */ | |
bb70624e JA |
1705 | static SHELL_VAR * |
1706 | get_funcname (self) | |
1707 | SHELL_VAR *self; | |
1708 | { | |
b80f6443 | 1709 | #if ! defined (ARRAY_VARS) |
7117c2d2 | 1710 | char *t; |
bb70624e JA |
1711 | if (variable_context && this_shell_function) |
1712 | { | |
7117c2d2 JA |
1713 | FREE (value_cell (self)); |
1714 | t = savestring (this_shell_function->name); | |
1715 | var_setvalue (self, t); | |
bb70624e | 1716 | } |
b80f6443 | 1717 | #endif |
bb70624e JA |
1718 | return (self); |
1719 | } | |
1720 | ||
1721 | void | |
1722 | make_funcname_visible (on_or_off) | |
1723 | int on_or_off; | |
726f6388 JA |
1724 | { |
1725 | SHELL_VAR *v; | |
1726 | ||
bb70624e JA |
1727 | v = find_variable ("FUNCNAME"); |
1728 | if (v == 0 || v->dynamic_value == 0) | |
1729 | return; | |
1730 | ||
1731 | if (on_or_off) | |
1732 | VUNSETATTR (v, att_invisible); | |
1733 | else | |
1734 | VSETATTR (v, att_invisible); | |
1735 | } | |
1736 | ||
f73dda09 JA |
1737 | static SHELL_VAR * |
1738 | init_funcname_var () | |
1739 | { | |
1740 | SHELL_VAR *v; | |
bb70624e | 1741 | |
f73dda09 JA |
1742 | v = find_variable ("FUNCNAME"); |
1743 | if (v) | |
1744 | return v; | |
b80f6443 JA |
1745 | #if defined (ARRAY_VARS) |
1746 | INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign); | |
1747 | #else | |
f73dda09 | 1748 | INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign); |
b80f6443 | 1749 | #endif |
f73dda09 JA |
1750 | VSETATTR (v, att_invisible|att_noassign); |
1751 | return v; | |
1752 | } | |
726f6388 | 1753 | |
bb70624e JA |
1754 | static void |
1755 | initialize_dynamic_variables () | |
1756 | { | |
1757 | SHELL_VAR *v; | |
726f6388 | 1758 | |
f73dda09 JA |
1759 | v = init_seconds_var (); |
1760 | ||
b80f6443 JA |
1761 | INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL); |
1762 | INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell); | |
1763 | ||
bb70624e | 1764 | INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random); |
95732b49 | 1765 | VSETATTR (v, att_integer); |
bb70624e | 1766 | INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno); |
95732b49 | 1767 | VSETATTR (v, att_integer); |
726f6388 | 1768 | |
3185942a JA |
1769 | INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign); |
1770 | VSETATTR (v, att_integer|att_readonly); | |
1771 | ||
726f6388 | 1772 | #if defined (HISTORY) |
7117c2d2 | 1773 | INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL); |
95732b49 | 1774 | VSETATTR (v, att_integer); |
726f6388 | 1775 | #endif |
ccc6cda3 | 1776 | |
b80f6443 JA |
1777 | #if defined (READLINE) |
1778 | INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks); | |
1779 | #endif | |
1780 | ||
ccc6cda3 | 1781 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
b80f6443 | 1782 | v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0); |
ccc6cda3 | 1783 | #endif /* PUSHD_AND_POPD && ARRAY_VARS */ |
d166f048 JA |
1784 | |
1785 | #if defined (ARRAY_VARS) | |
b80f6443 JA |
1786 | v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign); |
1787 | ||
1788 | # if defined (DEBUGGER) | |
95732b49 JA |
1789 | v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset); |
1790 | v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset); | |
b80f6443 | 1791 | # endif /* DEBUGGER */ |
95732b49 JA |
1792 | v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset); |
1793 | v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset); | |
3185942a JA |
1794 | |
1795 | v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree); | |
0001803f | 1796 | # if defined (ALIAS) |
3185942a | 1797 | v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree); |
0001803f | 1798 | # endif |
d166f048 | 1799 | #endif |
bb70624e | 1800 | |
f73dda09 | 1801 | v = init_funcname_var (); |
726f6388 JA |
1802 | } |
1803 | ||
7117c2d2 JA |
1804 | /* **************************************************************** */ |
1805 | /* */ | |
1806 | /* Retrieving variables and values */ | |
1807 | /* */ | |
1808 | /* **************************************************************** */ | |
1809 | ||
726f6388 JA |
1810 | /* How to get a pointer to the shell variable or function named NAME. |
1811 | HASHED_VARS is a pointer to the hash table containing the list | |
1812 | of interest (either variables or functions). */ | |
7117c2d2 JA |
1813 | |
1814 | static SHELL_VAR * | |
1815 | hash_lookup (name, hashed_vars) | |
f73dda09 | 1816 | const char *name; |
726f6388 JA |
1817 | HASH_TABLE *hashed_vars; |
1818 | { | |
1819 | BUCKET_CONTENTS *bucket; | |
1820 | ||
7117c2d2 | 1821 | bucket = hash_search (name, hashed_vars, 0); |
ac50fbac CR |
1822 | /* If we find the name in HASHED_VARS, set LAST_TABLE_SEARCHED to that |
1823 | table. */ | |
1824 | if (bucket) | |
1825 | last_table_searched = hashed_vars; | |
ccc6cda3 | 1826 | return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL); |
726f6388 JA |
1827 | } |
1828 | ||
7117c2d2 JA |
1829 | SHELL_VAR * |
1830 | var_lookup (name, vcontext) | |
1831 | const char *name; | |
1832 | VAR_CONTEXT *vcontext; | |
1833 | { | |
1834 | VAR_CONTEXT *vc; | |
1835 | SHELL_VAR *v; | |
1836 | ||
1837 | v = (SHELL_VAR *)NULL; | |
1838 | for (vc = vcontext; vc; vc = vc->down) | |
1839 | if (v = hash_lookup (name, vc->table)) | |
1840 | break; | |
1841 | ||
1842 | return v; | |
1843 | } | |
1844 | ||
726f6388 | 1845 | /* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero, |
7117c2d2 JA |
1846 | then also search the temporarily built list of exported variables. |
1847 | The lookup order is: | |
1848 | temporary_env | |
3185942a | 1849 | shell_variables list |
7117c2d2 JA |
1850 | */ |
1851 | ||
726f6388 | 1852 | SHELL_VAR * |
a0c0a00f | 1853 | find_variable_internal (name, flags) |
f73dda09 | 1854 | const char *name; |
a0c0a00f | 1855 | int flags; |
726f6388 | 1856 | { |
28ef6c31 | 1857 | SHELL_VAR *var; |
a0c0a00f | 1858 | int search_tempenv, force_tempenv; |
ac50fbac | 1859 | VAR_CONTEXT *vc; |
28ef6c31 JA |
1860 | |
1861 | var = (SHELL_VAR *)NULL; | |
726f6388 | 1862 | |
a0c0a00f CR |
1863 | force_tempenv = (flags & FV_FORCETEMPENV); |
1864 | ||
726f6388 JA |
1865 | /* If explicitly requested, first look in the temporary environment for |
1866 | the variable. This allows constructs such as "foo=x eval 'echo $foo'" | |
1867 | to get the `exported' value of $foo. This happens if we are executing | |
1868 | a function or builtin, or if we are looking up a variable in a | |
1869 | "subshell environment". */ | |
b80f6443 JA |
1870 | search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment); |
1871 | ||
1872 | if (search_tempenv && temporary_env) | |
7117c2d2 | 1873 | var = hash_lookup (name, temporary_env); |
726f6388 | 1874 | |
7117c2d2 | 1875 | if (var == 0) |
a0c0a00f CR |
1876 | { |
1877 | if ((flags & FV_SKIPINVISIBLE) == 0) | |
1878 | var = var_lookup (name, shell_variables); | |
1879 | else | |
1880 | { | |
1881 | /* essentially var_lookup expanded inline so we can check for | |
1882 | att_invisible */ | |
1883 | for (vc = shell_variables; vc; vc = vc->down) | |
1884 | { | |
1885 | var = hash_lookup (name, vc->table); | |
1886 | if (var && invisible_p (var)) | |
1887 | var = 0; | |
1888 | if (var) | |
1889 | break; | |
1890 | } | |
1891 | } | |
1892 | } | |
726f6388 | 1893 | |
7117c2d2 | 1894 | if (var == 0) |
726f6388 JA |
1895 | return ((SHELL_VAR *)NULL); |
1896 | ||
ccc6cda3 | 1897 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); |
726f6388 JA |
1898 | } |
1899 | ||
ac50fbac CR |
1900 | /* Look up and resolve the chain of nameref variables starting at V all the |
1901 | way to NULL or non-nameref. */ | |
1902 | SHELL_VAR * | |
1903 | find_variable_nameref (v) | |
1904 | SHELL_VAR *v; | |
1905 | { | |
a0c0a00f CR |
1906 | int level, flags; |
1907 | char *newname, *t; | |
ac50fbac CR |
1908 | SHELL_VAR *orig, *oldv; |
1909 | ||
1910 | level = 0; | |
1911 | orig = v; | |
1912 | while (v && nameref_p (v)) | |
1913 | { | |
1914 | level++; | |
1915 | if (level > NAMEREF_MAX) | |
1916 | return ((SHELL_VAR *)0); /* error message here? */ | |
1917 | newname = nameref_cell (v); | |
1918 | if (newname == 0 || *newname == '\0') | |
1919 | return ((SHELL_VAR *)0); | |
1920 | oldv = v; | |
a0c0a00f CR |
1921 | flags = 0; |
1922 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
1923 | flags |= FV_FORCETEMPENV; | |
1924 | /* We don't handle array subscripts here. */ | |
1925 | v = find_variable_internal (newname, flags); | |
ac50fbac CR |
1926 | if (v == orig || v == oldv) |
1927 | { | |
1928 | internal_warning (_("%s: circular name reference"), orig->name); | |
1929 | return ((SHELL_VAR *)0); | |
1930 | } | |
1931 | } | |
1932 | return v; | |
1933 | } | |
1934 | ||
1935 | /* Resolve the chain of nameref variables for NAME. XXX - could change later */ | |
1936 | SHELL_VAR * | |
a0c0a00f | 1937 | find_variable_last_nameref (name, vflags) |
ac50fbac | 1938 | const char *name; |
a0c0a00f | 1939 | int vflags; |
ac50fbac CR |
1940 | { |
1941 | SHELL_VAR *v, *nv; | |
1942 | char *newname; | |
a0c0a00f | 1943 | int level, flags; |
ac50fbac CR |
1944 | |
1945 | nv = v = find_variable_noref (name); | |
1946 | level = 0; | |
1947 | while (v && nameref_p (v)) | |
1948 | { | |
1949 | level++; | |
1950 | if (level > NAMEREF_MAX) | |
1951 | return ((SHELL_VAR *)0); /* error message here? */ | |
1952 | newname = nameref_cell (v); | |
1953 | if (newname == 0 || *newname == '\0') | |
a0c0a00f | 1954 | return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0); |
ac50fbac | 1955 | nv = v; |
a0c0a00f CR |
1956 | flags = 0; |
1957 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
1958 | flags |= FV_FORCETEMPENV; | |
1959 | /* We don't accommodate array subscripts here. */ | |
1960 | v = find_variable_internal (newname, flags); | |
ac50fbac CR |
1961 | } |
1962 | return nv; | |
1963 | } | |
1964 | ||
1965 | /* Resolve the chain of nameref variables for NAME. XXX - could change later */ | |
1966 | SHELL_VAR * | |
a0c0a00f | 1967 | find_global_variable_last_nameref (name, vflags) |
ac50fbac | 1968 | const char *name; |
a0c0a00f | 1969 | int vflags; |
ac50fbac CR |
1970 | { |
1971 | SHELL_VAR *v, *nv; | |
1972 | char *newname; | |
1973 | int level; | |
1974 | ||
1975 | nv = v = find_global_variable_noref (name); | |
1976 | level = 0; | |
1977 | while (v && nameref_p (v)) | |
1978 | { | |
1979 | level++; | |
1980 | if (level > NAMEREF_MAX) | |
1981 | return ((SHELL_VAR *)0); /* error message here? */ | |
1982 | newname = nameref_cell (v); | |
1983 | if (newname == 0 || *newname == '\0') | |
a0c0a00f | 1984 | return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0); |
ac50fbac | 1985 | nv = v; |
a0c0a00f | 1986 | /* We don't accommodate array subscripts here. */ |
ac50fbac CR |
1987 | v = find_global_variable_noref (newname); |
1988 | } | |
1989 | return nv; | |
1990 | } | |
1991 | ||
1992 | static SHELL_VAR * | |
1993 | find_nameref_at_context (v, vc) | |
1994 | SHELL_VAR *v; | |
1995 | VAR_CONTEXT *vc; | |
1996 | { | |
1997 | SHELL_VAR *nv, *nv2; | |
1998 | VAR_CONTEXT *nvc; | |
1999 | char *newname; | |
2000 | int level; | |
2001 | ||
2002 | nv = v; | |
2003 | level = 1; | |
2004 | while (nv && nameref_p (nv)) | |
2005 | { | |
2006 | level++; | |
2007 | if (level > NAMEREF_MAX) | |
a0c0a00f | 2008 | return (&nameref_maxloop_value); |
ac50fbac CR |
2009 | newname = nameref_cell (nv); |
2010 | if (newname == 0 || *newname == '\0') | |
2011 | return ((SHELL_VAR *)NULL); | |
2012 | nv2 = hash_lookup (newname, vc->table); | |
2013 | if (nv2 == 0) | |
2014 | break; | |
2015 | nv = nv2; | |
2016 | } | |
2017 | return nv; | |
2018 | } | |
2019 | ||
2020 | /* Do nameref resolution from the VC, which is the local context for some | |
2021 | function or builtin, `up' the chain to the global variables context. If | |
2022 | NVCP is not NULL, return the variable context where we finally ended the | |
2023 | nameref resolution (so the bind_variable_internal can use the correct | |
2024 | variable context and hash table). */ | |
2025 | static SHELL_VAR * | |
2026 | find_variable_nameref_context (v, vc, nvcp) | |
2027 | SHELL_VAR *v; | |
2028 | VAR_CONTEXT *vc; | |
2029 | VAR_CONTEXT **nvcp; | |
2030 | { | |
2031 | SHELL_VAR *nv, *nv2; | |
2032 | VAR_CONTEXT *nvc; | |
2033 | ||
2034 | /* Look starting at the current context all the way `up' */ | |
2035 | for (nv = v, nvc = vc; nvc; nvc = nvc->down) | |
2036 | { | |
2037 | nv2 = find_nameref_at_context (nv, nvc); | |
a0c0a00f CR |
2038 | if (nv2 == &nameref_maxloop_value) |
2039 | return (nv2); /* XXX */ | |
ac50fbac CR |
2040 | if (nv2 == 0) |
2041 | continue; | |
2042 | nv = nv2; | |
2043 | if (*nvcp) | |
2044 | *nvcp = nvc; | |
2045 | if (nameref_p (nv) == 0) | |
2046 | break; | |
2047 | } | |
2048 | return (nameref_p (nv) ? (SHELL_VAR *)NULL : nv); | |
2049 | } | |
2050 | ||
2051 | /* Do nameref resolution from the VC, which is the local context for some | |
2052 | function or builtin, `up' the chain to the global variables context. If | |
2053 | NVCP is not NULL, return the variable context where we finally ended the | |
2054 | nameref resolution (so the bind_variable_internal can use the correct | |
2055 | variable context and hash table). */ | |
2056 | static SHELL_VAR * | |
2057 | find_variable_last_nameref_context (v, vc, nvcp) | |
2058 | SHELL_VAR *v; | |
2059 | VAR_CONTEXT *vc; | |
2060 | VAR_CONTEXT **nvcp; | |
2061 | { | |
2062 | SHELL_VAR *nv, *nv2; | |
2063 | VAR_CONTEXT *nvc; | |
2064 | ||
2065 | /* Look starting at the current context all the way `up' */ | |
2066 | for (nv = v, nvc = vc; nvc; nvc = nvc->down) | |
2067 | { | |
2068 | nv2 = find_nameref_at_context (nv, nvc); | |
a0c0a00f CR |
2069 | if (nv2 == &nameref_maxloop_value) |
2070 | return (nv2); /* XXX */ | |
ac50fbac CR |
2071 | if (nv2 == 0) |
2072 | continue; | |
2073 | nv = nv2; | |
2074 | if (*nvcp) | |
2075 | *nvcp = nvc; | |
2076 | } | |
2077 | return (nameref_p (nv) ? nv : (SHELL_VAR *)NULL); | |
2078 | } | |
2079 | ||
a0c0a00f CR |
2080 | SHELL_VAR * |
2081 | find_variable_nameref_for_create (name, flags) | |
2082 | const char *name; | |
2083 | int flags; | |
2084 | { | |
2085 | SHELL_VAR *var; | |
2086 | ||
2087 | /* See if we have a nameref pointing to a variable that hasn't been | |
2088 | created yet. */ | |
2089 | var = find_variable_last_nameref (name, 1); | |
2090 | if ((flags&1) && var && nameref_p (var) && invisible_p (var)) | |
2091 | { | |
2092 | internal_warning (_("%s: removing nameref attribute"), name); | |
2093 | VUNSETATTR (var, att_nameref); | |
2094 | } | |
2095 | if (var && nameref_p (var)) | |
2096 | { | |
2097 | if (legal_identifier (nameref_cell (var)) == 0) | |
2098 | { | |
2099 | sh_invalidid (nameref_cell (var) ? nameref_cell (var) : ""); | |
2100 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2101 | } | |
2102 | } | |
2103 | return (var); | |
2104 | } | |
2105 | ||
2106 | SHELL_VAR * | |
2107 | find_variable_nameref_for_assignment (name, flags) | |
2108 | const char *name; | |
2109 | int flags; | |
2110 | { | |
2111 | SHELL_VAR *var; | |
2112 | ||
2113 | /* See if we have a nameref pointing to a variable that hasn't been | |
2114 | created yet. */ | |
2115 | var = find_variable_last_nameref (name, 1); | |
2116 | if (var && nameref_p (var) && invisible_p (var)) /* XXX - flags */ | |
2117 | { | |
2118 | internal_warning (_("%s: removing nameref attribute"), name); | |
2119 | VUNSETATTR (var, att_nameref); | |
2120 | } | |
2121 | if (var && nameref_p (var)) | |
2122 | { | |
2123 | if (valid_nameref_value (nameref_cell (var), 1) == 0) | |
2124 | { | |
2125 | sh_invalidid (nameref_cell (var) ? nameref_cell (var) : ""); | |
2126 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2127 | } | |
2128 | } | |
2129 | return (var); | |
2130 | } | |
2131 | ||
ac50fbac CR |
2132 | /* Find a variable, forcing a search of the temporary environment first */ |
2133 | SHELL_VAR * | |
2134 | find_variable_tempenv (name) | |
2135 | const char *name; | |
2136 | { | |
2137 | SHELL_VAR *var; | |
2138 | ||
a0c0a00f | 2139 | var = find_variable_internal (name, FV_FORCETEMPENV); |
ac50fbac CR |
2140 | if (var && nameref_p (var)) |
2141 | var = find_variable_nameref (var); | |
2142 | return (var); | |
2143 | } | |
2144 | ||
2145 | /* Find a variable, not forcing a search of the temporary environment first */ | |
2146 | SHELL_VAR * | |
2147 | find_variable_notempenv (name) | |
2148 | const char *name; | |
2149 | { | |
2150 | SHELL_VAR *var; | |
2151 | ||
2152 | var = find_variable_internal (name, 0); | |
2153 | if (var && nameref_p (var)) | |
2154 | var = find_variable_nameref (var); | |
2155 | return (var); | |
2156 | } | |
2157 | ||
495aee44 CR |
2158 | SHELL_VAR * |
2159 | find_global_variable (name) | |
2160 | const char *name; | |
2161 | { | |
2162 | SHELL_VAR *var; | |
2163 | ||
ac50fbac CR |
2164 | var = var_lookup (name, global_variables); |
2165 | if (var && nameref_p (var)) | |
2166 | var = find_variable_nameref (var); | |
2167 | ||
2168 | if (var == 0) | |
2169 | return ((SHELL_VAR *)NULL); | |
2170 | ||
2171 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2172 | } | |
2173 | ||
2174 | SHELL_VAR * | |
2175 | find_global_variable_noref (name) | |
2176 | const char *name; | |
2177 | { | |
2178 | SHELL_VAR *var; | |
2179 | ||
495aee44 CR |
2180 | var = var_lookup (name, global_variables); |
2181 | ||
2182 | if (var == 0) | |
2183 | return ((SHELL_VAR *)NULL); | |
2184 | ||
2185 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2186 | } | |
2187 | ||
ac50fbac CR |
2188 | SHELL_VAR * |
2189 | find_shell_variable (name) | |
2190 | const char *name; | |
2191 | { | |
2192 | SHELL_VAR *var; | |
2193 | ||
2194 | var = var_lookup (name, shell_variables); | |
2195 | if (var && nameref_p (var)) | |
2196 | var = find_variable_nameref (var); | |
2197 | ||
2198 | if (var == 0) | |
2199 | return ((SHELL_VAR *)NULL); | |
2200 | ||
2201 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2202 | } | |
2203 | ||
726f6388 JA |
2204 | /* Look up the variable entry named NAME. Returns the entry or NULL. */ |
2205 | SHELL_VAR * | |
2206 | find_variable (name) | |
f73dda09 | 2207 | const char *name; |
726f6388 | 2208 | { |
ac50fbac | 2209 | SHELL_VAR *v; |
a0c0a00f CR |
2210 | int flags; |
2211 | ||
2212 | last_table_searched = 0; | |
2213 | flags = 0; | |
2214 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2215 | flags |= FV_FORCETEMPENV; | |
2216 | v = find_variable_internal (name, flags); | |
2217 | if (v && nameref_p (v)) | |
2218 | v = find_variable_nameref (v); | |
2219 | return v; | |
2220 | } | |
2221 | ||
2222 | /* Find the first instance of NAME in the variable context chain; return first | |
2223 | one found without att_invisible set; return 0 if no non-invisible instances | |
2224 | found. */ | |
2225 | SHELL_VAR * | |
2226 | find_variable_no_invisible (name) | |
2227 | const char *name; | |
2228 | { | |
2229 | SHELL_VAR *v; | |
2230 | int flags; | |
ac50fbac CR |
2231 | |
2232 | last_table_searched = 0; | |
a0c0a00f CR |
2233 | flags = FV_SKIPINVISIBLE; |
2234 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2235 | flags |= FV_FORCETEMPENV; | |
2236 | v = find_variable_internal (name, flags); | |
2237 | if (v && nameref_p (v)) | |
2238 | v = find_variable_nameref (v); | |
2239 | return v; | |
2240 | } | |
2241 | ||
2242 | /* Find the first instance of NAME in the variable context chain; return first | |
2243 | one found even if att_invisible set. */ | |
2244 | SHELL_VAR * | |
2245 | find_variable_for_assignment (name) | |
2246 | const char *name; | |
2247 | { | |
2248 | SHELL_VAR *v; | |
2249 | int flags; | |
2250 | ||
2251 | last_table_searched = 0; | |
2252 | flags = 0; | |
2253 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2254 | flags |= FV_FORCETEMPENV; | |
2255 | v = find_variable_internal (name, flags); | |
ac50fbac CR |
2256 | if (v && nameref_p (v)) |
2257 | v = find_variable_nameref (v); | |
2258 | return v; | |
2259 | } | |
2260 | ||
2261 | SHELL_VAR * | |
2262 | find_variable_noref (name) | |
2263 | const char *name; | |
2264 | { | |
2265 | SHELL_VAR *v; | |
a0c0a00f | 2266 | int flags; |
ac50fbac | 2267 | |
a0c0a00f CR |
2268 | flags = 0; |
2269 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2270 | flags |= FV_FORCETEMPENV; | |
2271 | v = find_variable_internal (name, flags); | |
ac50fbac | 2272 | return v; |
726f6388 JA |
2273 | } |
2274 | ||
2275 | /* Look up the function entry whose name matches STRING. | |
2276 | Returns the entry or NULL. */ | |
2277 | SHELL_VAR * | |
2278 | find_function (name) | |
f73dda09 | 2279 | const char *name; |
726f6388 | 2280 | { |
7117c2d2 JA |
2281 | return (hash_lookup (name, shell_functions)); |
2282 | } | |
2283 | ||
b80f6443 JA |
2284 | /* Find the function definition for the shell function named NAME. Returns |
2285 | the entry or NULL. */ | |
2286 | FUNCTION_DEF * | |
2287 | find_function_def (name) | |
2288 | const char *name; | |
2289 | { | |
3185942a | 2290 | #if defined (DEBUGGER) |
b80f6443 | 2291 | return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs)); |
3185942a JA |
2292 | #else |
2293 | return ((FUNCTION_DEF *)0); | |
2294 | #endif | |
b80f6443 JA |
2295 | } |
2296 | ||
7117c2d2 JA |
2297 | /* Return the value of VAR. VAR is assumed to have been the result of a |
2298 | lookup without any subscript, if arrays are compiled into the shell. */ | |
2299 | char * | |
2300 | get_variable_value (var) | |
2301 | SHELL_VAR *var; | |
2302 | { | |
2303 | if (var == 0) | |
2304 | return ((char *)NULL); | |
2305 | #if defined (ARRAY_VARS) | |
2306 | else if (array_p (var)) | |
2307 | return (array_reference (array_cell (var), 0)); | |
3185942a JA |
2308 | else if (assoc_p (var)) |
2309 | return (assoc_reference (assoc_cell (var), "0")); | |
7117c2d2 JA |
2310 | #endif |
2311 | else | |
2312 | return (value_cell (var)); | |
726f6388 JA |
2313 | } |
2314 | ||
2315 | /* Return the string value of a variable. Return NULL if the variable | |
7117c2d2 | 2316 | doesn't exist. Don't cons a new string. This is a potential memory |
a0c0a00f CR |
2317 | leak if the variable is found in the temporary environment, but doesn't |
2318 | leak in practice. Since functions and variables have separate name | |
2319 | spaces, returns NULL if var_name is a shell function only. */ | |
726f6388 JA |
2320 | char * |
2321 | get_string_value (var_name) | |
28ef6c31 | 2322 | const char *var_name; |
726f6388 | 2323 | { |
d166f048 JA |
2324 | SHELL_VAR *var; |
2325 | ||
f73dda09 | 2326 | var = find_variable (var_name); |
7117c2d2 | 2327 | return ((var) ? get_variable_value (var) : (char *)NULL); |
726f6388 JA |
2328 | } |
2329 | ||
b72432fd JA |
2330 | /* This is present for use by the tilde and readline libraries. */ |
2331 | char * | |
28ef6c31 JA |
2332 | sh_get_env_value (v) |
2333 | const char *v; | |
b72432fd JA |
2334 | { |
2335 | return get_string_value (v); | |
2336 | } | |
2337 | ||
7117c2d2 JA |
2338 | /* **************************************************************** */ |
2339 | /* */ | |
2340 | /* Creating and setting variables */ | |
2341 | /* */ | |
2342 | /* **************************************************************** */ | |
2343 | ||
2344 | /* Set NAME to VALUE if NAME has no value. */ | |
2345 | SHELL_VAR * | |
2346 | set_if_not (name, value) | |
2347 | char *name, *value; | |
2348 | { | |
2349 | SHELL_VAR *v; | |
2350 | ||
0628567a JA |
2351 | if (shell_variables == 0) |
2352 | create_variable_tables (); | |
2353 | ||
7117c2d2 JA |
2354 | v = find_variable (name); |
2355 | if (v == 0) | |
95732b49 | 2356 | v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0); |
7117c2d2 JA |
2357 | return (v); |
2358 | } | |
2359 | ||
726f6388 JA |
2360 | /* Create a local variable referenced by NAME. */ |
2361 | SHELL_VAR * | |
2362 | make_local_variable (name) | |
f73dda09 | 2363 | const char *name; |
726f6388 | 2364 | { |
a0c0a00f | 2365 | SHELL_VAR *new_var, *old_var, *old_ref; |
7117c2d2 JA |
2366 | VAR_CONTEXT *vc; |
2367 | int was_tmpvar; | |
2368 | char *tmp_value; | |
726f6388 | 2369 | |
a0c0a00f CR |
2370 | /* We don't want to follow the nameref chain when making local variables; we |
2371 | just want to create them. */ | |
2372 | old_ref = find_variable_noref (name); | |
2373 | if (old_ref && nameref_p (old_ref) == 0) | |
2374 | old_ref = 0; | |
726f6388 JA |
2375 | /* local foo; local foo; is a no-op. */ |
2376 | old_var = find_variable (name); | |
a0c0a00f | 2377 | if (old_ref == 0 && old_var && local_p (old_var) && old_var->context == variable_context) |
9ddcfa16 | 2378 | return (old_var); |
726f6388 | 2379 | |
a0c0a00f CR |
2380 | /* local -n foo; local -n foo; is a no-op. */ |
2381 | if (old_ref && local_p (old_ref) && old_ref->context == variable_context) | |
2382 | return (old_ref); | |
2383 | ||
2384 | /* From here on, we want to use the refvar, not the variable it references */ | |
2385 | if (old_ref) | |
2386 | old_var = old_ref; | |
2387 | ||
7117c2d2 | 2388 | was_tmpvar = old_var && tempvar_p (old_var); |
ac50fbac CR |
2389 | /* If we're making a local variable in a shell function, the temporary env |
2390 | has already been merged into the function's variable context stack. We | |
2391 | can assume that a temporary var in the same context appears in the same | |
2392 | VAR_CONTEXT and can safely be returned without creating a new variable | |
2393 | (which results in duplicate names in the same VAR_CONTEXT->table */ | |
2394 | /* We can't just test tmpvar_p because variables in the temporary env given | |
2395 | to a shell function appear in the function's local variable VAR_CONTEXT | |
2396 | but retain their tempvar attribute. We want temporary variables that are | |
2397 | found in temporary_env, hence the test for last_table_searched, which is | |
2398 | set in hash_lookup and only (so far) checked here. */ | |
2399 | if (was_tmpvar && old_var->context == variable_context && last_table_searched != temporary_env) | |
2400 | { | |
a0c0a00f | 2401 | VUNSETATTR (old_var, att_invisible); /* XXX */ |
ac50fbac CR |
2402 | return (old_var); |
2403 | } | |
7117c2d2 JA |
2404 | if (was_tmpvar) |
2405 | tmp_value = value_cell (old_var); | |
2406 | ||
2407 | for (vc = shell_variables; vc; vc = vc->down) | |
2408 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
2409 | break; | |
2410 | ||
2411 | if (vc == 0) | |
2412 | { | |
b80f6443 | 2413 | internal_error (_("make_local_variable: no function context at current scope")); |
7117c2d2 JA |
2414 | return ((SHELL_VAR *)NULL); |
2415 | } | |
2416 | else if (vc->table == 0) | |
2417 | vc->table = hash_create (TEMPENV_HASH_BUCKETS); | |
2418 | ||
bb70624e JA |
2419 | /* Since this is called only from the local/declare/typeset code, we can |
2420 | call builtin_error here without worry (of course, it will also work | |
28ef6c31 JA |
2421 | for anything that sets this_command_name). Variables with the `noassign' |
2422 | attribute may not be made local. The test against old_var's context | |
2423 | level is to disallow local copies of readonly global variables (since I | |
2424 | believe that this could be a security hole). Readonly copies of calling | |
2425 | function local variables are OK. */ | |
2426 | if (old_var && (noassign_p (old_var) || | |
2427 | (readonly_p (old_var) && old_var->context == 0))) | |
2428 | { | |
2429 | if (readonly_p (old_var)) | |
7117c2d2 | 2430 | sh_readonly (name); |
ac50fbac CR |
2431 | else if (noassign_p (old_var)) |
2432 | builtin_error (_("%s: variable may not be assigned value"), name); | |
2433 | #if 0 | |
2434 | /* Let noassign variables through with a warning */ | |
2435 | if (readonly_p (old_var)) | |
2436 | #endif | |
2437 | return ((SHELL_VAR *)NULL); | |
bb70624e JA |
2438 | } |
2439 | ||
d166f048 | 2440 | if (old_var == 0) |
3185942a | 2441 | new_var = make_new_variable (name, vc->table); |
726f6388 JA |
2442 | else |
2443 | { | |
7117c2d2 | 2444 | new_var = make_new_variable (name, vc->table); |
726f6388 | 2445 | |
7117c2d2 JA |
2446 | /* If we found this variable in one of the temporary environments, |
2447 | inherit its value. Watch to see if this causes problems with | |
ac50fbac CR |
2448 | things like `x=4 local x'. XXX - see above for temporary env |
2449 | variables with the same context level as variable_context */ | |
2450 | /* XXX - we should only do this if the variable is not an array. */ | |
7117c2d2 | 2451 | if (was_tmpvar) |
3185942a | 2452 | var_setvalue (new_var, savestring (tmp_value)); |
726f6388 | 2453 | |
ccc6cda3 | 2454 | new_var->attributes = exported_p (old_var) ? att_exported : 0; |
726f6388 JA |
2455 | } |
2456 | ||
7117c2d2 JA |
2457 | vc->flags |= VC_HASLOCAL; |
2458 | ||
726f6388 | 2459 | new_var->context = variable_context; |
bb70624e | 2460 | VSETATTR (new_var, att_local); |
726f6388 | 2461 | |
7117c2d2 JA |
2462 | if (ifsname (name)) |
2463 | setifs (new_var); | |
726f6388 | 2464 | |
a0c0a00f | 2465 | if (was_tmpvar == 0 && no_invisible_vars == 0) |
ac50fbac | 2466 | VSETATTR (new_var, att_invisible); /* XXX */ |
726f6388 JA |
2467 | return (new_var); |
2468 | } | |
2469 | ||
7117c2d2 | 2470 | /* Create a new shell variable with name NAME. */ |
f73dda09 | 2471 | static SHELL_VAR * |
7117c2d2 | 2472 | new_shell_variable (name) |
f73dda09 | 2473 | const char *name; |
726f6388 | 2474 | { |
ccc6cda3 | 2475 | SHELL_VAR *entry; |
726f6388 | 2476 | |
ccc6cda3 | 2477 | entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); |
726f6388 | 2478 | |
ccc6cda3 | 2479 | entry->name = savestring (name); |
7117c2d2 | 2480 | var_setvalue (entry, (char *)NULL); |
bb70624e | 2481 | CLEAR_EXPORTSTR (entry); |
726f6388 | 2482 | |
7117c2d2 JA |
2483 | entry->dynamic_value = (sh_var_value_func_t *)NULL; |
2484 | entry->assign_func = (sh_var_assign_func_t *)NULL; | |
2485 | ||
2486 | entry->attributes = 0; | |
ccc6cda3 JA |
2487 | |
2488 | /* Always assume variables are to be made at toplevel! | |
ac50fbac | 2489 | make_local_variable has the responsibility of changing the |
ccc6cda3 JA |
2490 | variable context. */ |
2491 | entry->context = 0; | |
7117c2d2 JA |
2492 | |
2493 | return (entry); | |
2494 | } | |
2495 | ||
2496 | /* Create a new shell variable with name NAME and add it to the hash table | |
2497 | TABLE. */ | |
2498 | static SHELL_VAR * | |
2499 | make_new_variable (name, table) | |
2500 | const char *name; | |
2501 | HASH_TABLE *table; | |
2502 | { | |
2503 | SHELL_VAR *entry; | |
2504 | BUCKET_CONTENTS *elt; | |
2505 | ||
2506 | entry = new_shell_variable (name); | |
ccc6cda3 | 2507 | |
28ef6c31 JA |
2508 | /* Make sure we have a shell_variables hash table to add to. */ |
2509 | if (shell_variables == 0) | |
0628567a | 2510 | create_variable_tables (); |
28ef6c31 | 2511 | |
7117c2d2 JA |
2512 | elt = hash_insert (savestring (name), table, HASH_NOSRCH); |
2513 | elt->data = (PTR_T)entry; | |
ccc6cda3 JA |
2514 | |
2515 | return entry; | |
2516 | } | |
2517 | ||
2518 | #if defined (ARRAY_VARS) | |
2519 | SHELL_VAR * | |
2520 | make_new_array_variable (name) | |
2521 | char *name; | |
2522 | { | |
2523 | SHELL_VAR *entry; | |
2524 | ARRAY *array; | |
2525 | ||
7117c2d2 JA |
2526 | entry = make_new_variable (name, global_variables->table); |
2527 | array = array_create (); | |
3185942a | 2528 | |
7117c2d2 | 2529 | var_setarray (entry, array); |
bb70624e | 2530 | VSETATTR (entry, att_array); |
ccc6cda3 JA |
2531 | return entry; |
2532 | } | |
3185942a JA |
2533 | |
2534 | SHELL_VAR * | |
ac50fbac | 2535 | make_local_array_variable (name, assoc_ok) |
3185942a | 2536 | char *name; |
ac50fbac | 2537 | int assoc_ok; |
3185942a JA |
2538 | { |
2539 | SHELL_VAR *var; | |
2540 | ARRAY *array; | |
2541 | ||
2542 | var = make_local_variable (name); | |
ac50fbac | 2543 | if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var))) |
3185942a JA |
2544 | return var; |
2545 | ||
2546 | array = array_create (); | |
2547 | ||
2548 | dispose_variable_value (var); | |
2549 | var_setarray (var, array); | |
2550 | VSETATTR (var, att_array); | |
2551 | return var; | |
2552 | } | |
2553 | ||
2554 | SHELL_VAR * | |
2555 | make_new_assoc_variable (name) | |
2556 | char *name; | |
2557 | { | |
2558 | SHELL_VAR *entry; | |
2559 | HASH_TABLE *hash; | |
2560 | ||
2561 | entry = make_new_variable (name, global_variables->table); | |
2562 | hash = assoc_create (0); | |
2563 | ||
2564 | var_setassoc (entry, hash); | |
2565 | VSETATTR (entry, att_assoc); | |
2566 | return entry; | |
2567 | } | |
2568 | ||
2569 | SHELL_VAR * | |
2570 | make_local_assoc_variable (name) | |
2571 | char *name; | |
2572 | { | |
2573 | SHELL_VAR *var; | |
2574 | HASH_TABLE *hash; | |
2575 | ||
2576 | var = make_local_variable (name); | |
2577 | if (var == 0 || assoc_p (var)) | |
2578 | return var; | |
2579 | ||
2580 | dispose_variable_value (var); | |
2581 | hash = assoc_create (0); | |
2582 | ||
2583 | var_setassoc (var, hash); | |
2584 | VSETATTR (var, att_assoc); | |
2585 | return var; | |
2586 | } | |
ccc6cda3 JA |
2587 | #endif |
2588 | ||
2589 | char * | |
95732b49 | 2590 | make_variable_value (var, value, flags) |
ccc6cda3 JA |
2591 | SHELL_VAR *var; |
2592 | char *value; | |
95732b49 | 2593 | int flags; |
ccc6cda3 | 2594 | { |
95732b49 JA |
2595 | char *retval, *oval; |
2596 | intmax_t lval, rval; | |
3185942a | 2597 | int expok, olen, op; |
ccc6cda3 JA |
2598 | |
2599 | /* If this variable has had its type set to integer (via `declare -i'), | |
2600 | then do expression evaluation on it and store the result. The | |
7117c2d2 | 2601 | functions in expr.c (evalexp()) and bind_int_variable() are responsible |
ccc6cda3 JA |
2602 | for turning off the integer flag if they don't want further |
2603 | evaluation done. */ | |
2604 | if (integer_p (var)) | |
2605 | { | |
95732b49 JA |
2606 | if (flags & ASS_APPEND) |
2607 | { | |
2608 | oval = value_cell (var); | |
2609 | lval = evalexp (oval, &expok); /* ksh93 seems to do this */ | |
2610 | if (expok == 0) | |
f1be666c JA |
2611 | { |
2612 | top_level_cleanup (); | |
2613 | jump_to_top_level (DISCARD); | |
2614 | } | |
95732b49 JA |
2615 | } |
2616 | rval = evalexp (value, &expok); | |
d166f048 | 2617 | if (expok == 0) |
f1be666c JA |
2618 | { |
2619 | top_level_cleanup (); | |
2620 | jump_to_top_level (DISCARD); | |
2621 | } | |
ac50fbac CR |
2622 | /* This can be fooled if the variable's value changes while evaluating |
2623 | `rval'. We can change it if we move the evaluation of lval to here. */ | |
95732b49 JA |
2624 | if (flags & ASS_APPEND) |
2625 | rval += lval; | |
2626 | retval = itos (rval); | |
ccc6cda3 | 2627 | } |
3185942a JA |
2628 | #if defined (CASEMOD_ATTRS) |
2629 | else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var)) | |
2630 | { | |
2631 | if (flags & ASS_APPEND) | |
2632 | { | |
2633 | oval = get_variable_value (var); | |
2634 | if (oval == 0) /* paranoia */ | |
2635 | oval = ""; | |
2636 | olen = STRLEN (oval); | |
2637 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2638 | strcpy (retval, oval); | |
2639 | if (value) | |
2640 | strcpy (retval+olen, value); | |
2641 | } | |
2642 | else if (*value) | |
2643 | retval = savestring (value); | |
2644 | else | |
2645 | { | |
2646 | retval = (char *)xmalloc (1); | |
2647 | retval[0] = '\0'; | |
2648 | } | |
2649 | op = capcase_p (var) ? CASE_CAPITALIZE | |
2650 | : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER); | |
2651 | oval = sh_modcase (retval, (char *)0, op); | |
2652 | free (retval); | |
2653 | retval = oval; | |
2654 | } | |
2655 | #endif /* CASEMOD_ATTRS */ | |
ccc6cda3 JA |
2656 | else if (value) |
2657 | { | |
95732b49 JA |
2658 | if (flags & ASS_APPEND) |
2659 | { | |
2660 | oval = get_variable_value (var); | |
2661 | if (oval == 0) /* paranoia */ | |
2662 | oval = ""; | |
2663 | olen = STRLEN (oval); | |
2664 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2665 | strcpy (retval, oval); | |
2666 | if (value) | |
2667 | strcpy (retval+olen, value); | |
2668 | } | |
2669 | else if (*value) | |
ccc6cda3 JA |
2670 | retval = savestring (value); |
2671 | else | |
726f6388 | 2672 | { |
f73dda09 | 2673 | retval = (char *)xmalloc (1); |
ccc6cda3 | 2674 | retval[0] = '\0'; |
726f6388 | 2675 | } |
ccc6cda3 JA |
2676 | } |
2677 | else | |
2678 | retval = (char *)NULL; | |
726f6388 | 2679 | |
ccc6cda3 JA |
2680 | return retval; |
2681 | } | |
726f6388 | 2682 | |
7117c2d2 JA |
2683 | /* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the |
2684 | temporary environment (but usually is not). */ | |
2685 | static SHELL_VAR * | |
95732b49 | 2686 | bind_variable_internal (name, value, table, hflags, aflags) |
f73dda09 JA |
2687 | const char *name; |
2688 | char *value; | |
7117c2d2 | 2689 | HASH_TABLE *table; |
95732b49 | 2690 | int hflags, aflags; |
ccc6cda3 | 2691 | { |
a0c0a00f CR |
2692 | char *newval, *tname; |
2693 | SHELL_VAR *entry, *tentry; | |
28ef6c31 | 2694 | |
7117c2d2 | 2695 | entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table); |
ac50fbac CR |
2696 | /* Follow the nameref chain here if this is the global variables table */ |
2697 | if (entry && nameref_p (entry) && (invisible_p (entry) == 0) && table == global_variables->table) | |
2698 | { | |
2699 | entry = find_global_variable (entry->name); | |
2700 | /* Let's see if we have a nameref referencing a variable that hasn't yet | |
2701 | been created. */ | |
2702 | if (entry == 0) | |
a0c0a00f | 2703 | entry = find_variable_last_nameref (name, 0); /* XXX */ |
ac50fbac CR |
2704 | if (entry == 0) /* just in case */ |
2705 | return (entry); | |
2706 | } | |
ccc6cda3 | 2707 | |
a0c0a00f CR |
2708 | /* The first clause handles `declare -n ref; ref=x;' or `declare -n ref; |
2709 | declare -n ref' */ | |
ac50fbac | 2710 | if (entry && invisible_p (entry) && nameref_p (entry)) |
a0c0a00f CR |
2711 | { |
2712 | if ((aflags & ASS_FORCE) == 0 && value && valid_nameref_value (value, 0) == 0) | |
2713 | { | |
2714 | sh_invalidid (value); | |
2715 | return ((SHELL_VAR *)NULL); | |
2716 | } | |
2717 | goto assign_value; | |
2718 | } | |
ac50fbac CR |
2719 | else if (entry && nameref_p (entry)) |
2720 | { | |
2721 | newval = nameref_cell (entry); | |
2722 | #if defined (ARRAY_VARS) | |
a0c0a00f CR |
2723 | /* declare -n foo=x[2] ; foo=bar */ |
2724 | if (valid_array_reference (newval, 0)) | |
2725 | { | |
2726 | tname = array_variable_name (newval, (char **)0, (int *)0); | |
2727 | if (tname && (tentry = find_variable_noref (tname)) && nameref_p (tentry)) | |
2728 | { | |
2729 | /* nameref variables can't be arrays */ | |
2730 | internal_warning (_("%s: removing nameref attribute"), name_cell (tentry)); | |
2731 | FREE (value_cell (tentry)); /* XXX - bash-4.3 compat */ | |
2732 | var_setvalue (tentry, (char *)NULL); | |
2733 | VUNSETATTR (tentry, att_nameref); | |
2734 | } | |
2735 | free (tname); | |
2736 | /* XXX - should it be aflags? */ | |
2737 | entry = assign_array_element (newval, make_variable_value (entry, value, 0), aflags|ASS_NAMEREF); | |
2738 | if (entry == 0) | |
2739 | return entry; | |
2740 | } | |
ac50fbac CR |
2741 | else |
2742 | #endif | |
2743 | { | |
2744 | entry = make_new_variable (newval, table); | |
2745 | var_setvalue (entry, make_variable_value (entry, value, 0)); | |
2746 | } | |
2747 | } | |
2748 | else if (entry == 0) | |
ccc6cda3 | 2749 | { |
7117c2d2 | 2750 | entry = make_new_variable (name, table); |
95732b49 | 2751 | var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */ |
726f6388 | 2752 | } |
28ef6c31 | 2753 | else if (entry->assign_func) /* array vars have assign functions now */ |
bb70624e JA |
2754 | { |
2755 | INVALIDATE_EXPORTSTR (entry); | |
95732b49 | 2756 | newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value; |
0001803f CR |
2757 | if (assoc_p (entry)) |
2758 | entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0")); | |
2759 | else if (array_p (entry)) | |
2760 | entry = (*(entry->assign_func)) (entry, newval, 0, 0); | |
2761 | else | |
2762 | entry = (*(entry->assign_func)) (entry, newval, -1, 0); | |
95732b49 | 2763 | if (newval != value) |
3185942a | 2764 | free (newval); |
95732b49 | 2765 | return (entry); |
bb70624e | 2766 | } |
726f6388 JA |
2767 | else |
2768 | { | |
ac50fbac | 2769 | assign_value: |
a0c0a00f | 2770 | if ((readonly_p (entry) && (aflags & ASS_FORCE) == 0) || noassign_p (entry)) |
726f6388 | 2771 | { |
28ef6c31 | 2772 | if (readonly_p (entry)) |
a0c0a00f | 2773 | err_readonly (name_cell (entry)); |
726f6388 JA |
2774 | return (entry); |
2775 | } | |
2776 | ||
2777 | /* Variables which are bound are visible. */ | |
bb70624e | 2778 | VUNSETATTR (entry, att_invisible); |
726f6388 | 2779 | |
ac50fbac CR |
2780 | #if defined (ARRAY_VARS) |
2781 | if (assoc_p (entry) || array_p (entry)) | |
2782 | newval = make_array_variable_value (entry, 0, "0", value, aflags); | |
2783 | else | |
2784 | #endif | |
2785 | ||
95732b49 | 2786 | newval = make_variable_value (entry, value, aflags); /* XXX */ |
726f6388 | 2787 | |
bb70624e JA |
2788 | /* Invalidate any cached export string */ |
2789 | INVALIDATE_EXPORTSTR (entry); | |
2790 | ||
ccc6cda3 JA |
2791 | #if defined (ARRAY_VARS) |
2792 | /* XXX -- this bears looking at again -- XXX */ | |
2793 | /* If an existing array variable x is being assigned to with x=b or | |
2794 | `read x' or something of that nature, silently convert it to | |
2795 | x[0]=b or `read x[0]'. */ | |
ac50fbac | 2796 | if (assoc_p (entry)) |
d166f048 | 2797 | { |
ac50fbac | 2798 | assoc_insert (assoc_cell (entry), savestring ("0"), newval); |
d166f048 JA |
2799 | free (newval); |
2800 | } | |
ac50fbac | 2801 | else if (array_p (entry)) |
3185942a | 2802 | { |
ac50fbac | 2803 | array_insert (array_cell (entry), 0, newval); |
3185942a JA |
2804 | free (newval); |
2805 | } | |
726f6388 | 2806 | else |
f73dda09 | 2807 | #endif |
726f6388 | 2808 | { |
7117c2d2 JA |
2809 | FREE (value_cell (entry)); |
2810 | var_setvalue (entry, newval); | |
726f6388 JA |
2811 | } |
2812 | } | |
2813 | ||
2814 | if (mark_modified_vars) | |
bb70624e | 2815 | VSETATTR (entry, att_exported); |
726f6388 JA |
2816 | |
2817 | if (exported_p (entry)) | |
2818 | array_needs_making = 1; | |
2819 | ||
2820 | return (entry); | |
2821 | } | |
7117c2d2 JA |
2822 | |
2823 | /* Bind a variable NAME to VALUE. This conses up the name | |
2824 | and value strings. If we have a temporary environment, we bind there | |
2825 | first, then we bind into shell_variables. */ | |
2826 | ||
2827 | SHELL_VAR * | |
95732b49 | 2828 | bind_variable (name, value, flags) |
7117c2d2 JA |
2829 | const char *name; |
2830 | char *value; | |
95732b49 | 2831 | int flags; |
7117c2d2 | 2832 | { |
ac50fbac CR |
2833 | SHELL_VAR *v, *nv; |
2834 | VAR_CONTEXT *vc, *nvc; | |
2835 | int level; | |
7117c2d2 JA |
2836 | |
2837 | if (shell_variables == 0) | |
0628567a | 2838 | create_variable_tables (); |
7117c2d2 JA |
2839 | |
2840 | /* If we have a temporary environment, look there first for the variable, | |
2841 | and, if found, modify the value there before modifying it in the | |
2842 | shell_variables table. This allows sourced scripts to modify values | |
2843 | given to them in a temporary environment while modifying the variable | |
2844 | value that the caller sees. */ | |
a0c0a00f | 2845 | if (temporary_env && value) /* XXX - can value be null here? */ |
7117c2d2 JA |
2846 | bind_tempenv_variable (name, value); |
2847 | ||
2848 | /* XXX -- handle local variables here. */ | |
2849 | for (vc = shell_variables; vc; vc = vc->down) | |
2850 | { | |
2851 | if (vc_isfuncenv (vc) || vc_isbltnenv (vc)) | |
3185942a JA |
2852 | { |
2853 | v = hash_lookup (name, vc->table); | |
ac50fbac CR |
2854 | nvc = vc; |
2855 | if (v && nameref_p (v)) | |
2856 | { | |
2857 | nv = find_variable_nameref_context (v, vc, &nvc); | |
2858 | if (nv == 0) | |
2859 | { | |
2860 | nv = find_variable_last_nameref_context (v, vc, &nvc); | |
2861 | if (nv && nameref_p (nv)) | |
2862 | { | |
2863 | /* If this nameref variable doesn't have a value yet, | |
2864 | set the value. Otherwise, assign using the value as | |
2865 | normal. */ | |
2866 | if (nameref_cell (nv) == 0) | |
2867 | return (bind_variable_internal (nv->name, value, nvc->table, 0, flags)); | |
a0c0a00f CR |
2868 | #if defined (ARRAY_VARS) |
2869 | else if (valid_array_reference (nameref_cell (nv), 0)) | |
2870 | return (assign_array_element (nameref_cell (nv), value, flags)); | |
2871 | else | |
2872 | #endif | |
2873 | return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags)); | |
2874 | } | |
2875 | else if (nv == &nameref_maxloop_value) | |
2876 | { | |
2877 | internal_warning (_("%s: circular name reference"), v->name); | |
2878 | #if 0 | |
2879 | return (bind_variable_value (v, value, flags|ASS_NAMEREF)); | |
2880 | #else | |
2881 | v = 0; /* backwards compat */ | |
2882 | #endif | |
ac50fbac CR |
2883 | } |
2884 | else | |
2885 | v = nv; | |
2886 | } | |
a0c0a00f CR |
2887 | else if (nv == &nameref_maxloop_value) |
2888 | { | |
2889 | internal_warning (_("%s: circular name reference"), v->name); | |
2890 | #if 0 | |
2891 | return (bind_variable_value (v, value, flags|ASS_NAMEREF)); | |
2892 | #else | |
2893 | v = 0; /* backwards compat */ | |
2894 | #endif | |
2895 | } | |
ac50fbac CR |
2896 | else |
2897 | v = nv; | |
2898 | } | |
3185942a | 2899 | if (v) |
ac50fbac | 2900 | return (bind_variable_internal (v->name, value, nvc->table, 0, flags)); |
3185942a | 2901 | } |
7117c2d2 | 2902 | } |
ac50fbac CR |
2903 | /* bind_variable_internal will handle nameref resolution in this case */ |
2904 | return (bind_variable_internal (name, value, global_variables->table, 0, flags)); | |
2905 | } | |
2906 | ||
2907 | SHELL_VAR * | |
2908 | bind_global_variable (name, value, flags) | |
2909 | const char *name; | |
2910 | char *value; | |
2911 | int flags; | |
2912 | { | |
2913 | SHELL_VAR *v, *nv; | |
2914 | VAR_CONTEXT *vc, *nvc; | |
2915 | int level; | |
2916 | ||
2917 | if (shell_variables == 0) | |
2918 | create_variable_tables (); | |
2919 | ||
2920 | /* bind_variable_internal will handle nameref resolution in this case */ | |
95732b49 | 2921 | return (bind_variable_internal (name, value, global_variables->table, 0, flags)); |
7117c2d2 | 2922 | } |
726f6388 | 2923 | |
bb70624e JA |
2924 | /* Make VAR, a simple shell variable, have value VALUE. Once assigned a |
2925 | value, variables are no longer invisible. This is a duplicate of part | |
2926 | of the internals of bind_variable. If the variable is exported, or | |
2927 | all modified variables should be exported, mark the variable for export | |
2928 | and note that the export environment needs to be recreated. */ | |
2929 | SHELL_VAR * | |
95732b49 | 2930 | bind_variable_value (var, value, aflags) |
bb70624e JA |
2931 | SHELL_VAR *var; |
2932 | char *value; | |
95732b49 | 2933 | int aflags; |
bb70624e JA |
2934 | { |
2935 | char *t; | |
ac50fbac | 2936 | int invis; |
bb70624e | 2937 | |
ac50fbac | 2938 | invis = invisible_p (var); |
bb70624e JA |
2939 | VUNSETATTR (var, att_invisible); |
2940 | ||
95732b49 JA |
2941 | if (var->assign_func) |
2942 | { | |
2943 | /* If we're appending, we need the old value, so use | |
2944 | make_variable_value */ | |
2945 | t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value; | |
3185942a | 2946 | (*(var->assign_func)) (var, t, -1, 0); |
95732b49 JA |
2947 | if (t != value && t) |
2948 | free (t); | |
2949 | } | |
2950 | else | |
2951 | { | |
2952 | t = make_variable_value (var, value, aflags); | |
a0c0a00f CR |
2953 | if ((aflags & (ASS_NAMEREF|ASS_FORCE)) == ASS_NAMEREF && check_selfref (name_cell (var), t, 0)) |
2954 | { | |
2955 | if (variable_context) | |
2956 | internal_warning (_("%s: circular name reference"), name_cell (var)); | |
2957 | else | |
2958 | { | |
2959 | internal_error (_("%s: nameref variable self references not allowed"), name_cell (var)); | |
2960 | free (t); | |
2961 | if (invis) | |
2962 | VSETATTR (var, att_invisible); /* XXX */ | |
2963 | return ((SHELL_VAR *)NULL); | |
2964 | } | |
2965 | } | |
2966 | if ((aflags & ASS_NAMEREF) && (valid_nameref_value (t, 0) == 0)) | |
ac50fbac CR |
2967 | { |
2968 | free (t); | |
2969 | if (invis) | |
2970 | VSETATTR (var, att_invisible); /* XXX */ | |
2971 | return ((SHELL_VAR *)NULL); | |
2972 | } | |
95732b49 JA |
2973 | FREE (value_cell (var)); |
2974 | var_setvalue (var, t); | |
2975 | } | |
bb70624e JA |
2976 | |
2977 | INVALIDATE_EXPORTSTR (var); | |
2978 | ||
2979 | if (mark_modified_vars) | |
2980 | VSETATTR (var, att_exported); | |
2981 | ||
2982 | if (exported_p (var)) | |
2983 | array_needs_making = 1; | |
2984 | ||
2985 | return (var); | |
2986 | } | |
2987 | ||
2988 | /* Bind/create a shell variable with the name LHS to the RHS. | |
2989 | This creates or modifies a variable such that it is an integer. | |
2990 | ||
2991 | This used to be in expr.c, but it is here so that all of the | |
2992 | variable binding stuff is localized. Since we don't want any | |
2993 | recursive evaluation from bind_variable() (possible without this code, | |
2994 | since bind_variable() calls the evaluator for variables with the integer | |
2995 | attribute set), we temporarily turn off the integer attribute for each | |
2996 | variable we set here, then turn it back on after binding as necessary. */ | |
2997 | ||
2998 | SHELL_VAR * | |
2999 | bind_int_variable (lhs, rhs) | |
3000 | char *lhs, *rhs; | |
3001 | { | |
3002 | register SHELL_VAR *v; | |
ac50fbac | 3003 | int isint, isarr, implicitarray; |
7117c2d2 | 3004 | |
ac50fbac | 3005 | isint = isarr = implicitarray = 0; |
7117c2d2 | 3006 | #if defined (ARRAY_VARS) |
a0c0a00f | 3007 | if (valid_array_reference (lhs, 0)) |
7117c2d2 JA |
3008 | { |
3009 | isarr = 1; | |
3010 | v = array_variable_part (lhs, (char **)0, (int *)0); | |
3011 | } | |
3012 | else | |
3013 | #endif | |
3014 | v = find_variable (lhs); | |
bb70624e | 3015 | |
bb70624e JA |
3016 | if (v) |
3017 | { | |
3018 | isint = integer_p (v); | |
3019 | VUNSETATTR (v, att_integer); | |
ac50fbac CR |
3020 | #if defined (ARRAY_VARS) |
3021 | if (array_p (v) && isarr == 0) | |
3022 | implicitarray = 1; | |
3023 | #endif | |
bb70624e JA |
3024 | } |
3025 | ||
7117c2d2 JA |
3026 | #if defined (ARRAY_VARS) |
3027 | if (isarr) | |
95732b49 | 3028 | v = assign_array_element (lhs, rhs, 0); |
ac50fbac CR |
3029 | else if (implicitarray) |
3030 | v = bind_array_variable (lhs, 0, rhs, 0); | |
7117c2d2 JA |
3031 | else |
3032 | #endif | |
95732b49 | 3033 | v = bind_variable (lhs, rhs, 0); |
7117c2d2 | 3034 | |
4e3e5312 CR |
3035 | if (v) |
3036 | { | |
3037 | if (isint) | |
3038 | VSETATTR (v, att_integer); | |
3039 | VUNSETATTR (v, att_invisible); | |
3040 | } | |
ac50fbac | 3041 | |
a0c0a00f CR |
3042 | if (v && nameref_p (v)) |
3043 | internal_warning (_("%s: assigning integer to name reference"), lhs); | |
3044 | ||
bb70624e JA |
3045 | return (v); |
3046 | } | |
3047 | ||
ccc6cda3 | 3048 | SHELL_VAR * |
f73dda09 JA |
3049 | bind_var_to_int (var, val) |
3050 | char *var; | |
7117c2d2 | 3051 | intmax_t val; |
ccc6cda3 | 3052 | { |
7117c2d2 | 3053 | char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p; |
ccc6cda3 | 3054 | |
f73dda09 JA |
3055 | p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0); |
3056 | return (bind_int_variable (var, p)); | |
ccc6cda3 JA |
3057 | } |
3058 | ||
7117c2d2 JA |
3059 | /* Do a function binding to a variable. You pass the name and |
3060 | the command to bind to. This conses the name and command. */ | |
3061 | SHELL_VAR * | |
3062 | bind_function (name, value) | |
3063 | const char *name; | |
3064 | COMMAND *value; | |
3065 | { | |
3066 | SHELL_VAR *entry; | |
3067 | ||
3068 | entry = find_function (name); | |
3069 | if (entry == 0) | |
3070 | { | |
3071 | BUCKET_CONTENTS *elt; | |
3072 | ||
3073 | elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH); | |
3074 | entry = new_shell_variable (name); | |
3075 | elt->data = (PTR_T)entry; | |
3076 | } | |
3077 | else | |
3078 | INVALIDATE_EXPORTSTR (entry); | |
3079 | ||
3080 | if (var_isset (entry)) | |
3081 | dispose_command (function_cell (entry)); | |
3082 | ||
3083 | if (value) | |
3084 | var_setfunc (entry, copy_command (value)); | |
3085 | else | |
3086 | var_setfunc (entry, 0); | |
3087 | ||
3088 | VSETATTR (entry, att_function); | |
3089 | ||
3090 | if (mark_modified_vars) | |
3091 | VSETATTR (entry, att_exported); | |
3092 | ||
3093 | VUNSETATTR (entry, att_invisible); /* Just to be sure */ | |
3094 | ||
3095 | if (exported_p (entry)) | |
3096 | array_needs_making = 1; | |
3097 | ||
3098 | #if defined (PROGRAMMABLE_COMPLETION) | |
3099 | set_itemlist_dirty (&it_functions); | |
3100 | #endif | |
3101 | ||
3102 | return (entry); | |
3103 | } | |
3104 | ||
3185942a | 3105 | #if defined (DEBUGGER) |
b80f6443 JA |
3106 | /* Bind a function definition, which includes source file and line number |
3107 | information in addition to the command, into the FUNCTION_DEF hash table.*/ | |
3108 | void | |
3109 | bind_function_def (name, value) | |
3110 | const char *name; | |
3111 | FUNCTION_DEF *value; | |
3112 | { | |
3113 | FUNCTION_DEF *entry; | |
3114 | BUCKET_CONTENTS *elt; | |
3115 | COMMAND *cmd; | |
3116 | ||
3117 | entry = find_function_def (name); | |
3118 | if (entry) | |
3119 | { | |
3120 | dispose_function_def_contents (entry); | |
3121 | entry = copy_function_def_contents (value, entry); | |
3122 | } | |
3123 | else | |
3124 | { | |
3125 | cmd = value->command; | |
3126 | value->command = 0; | |
3127 | entry = copy_function_def (value); | |
3128 | value->command = cmd; | |
3129 | ||
3130 | elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH); | |
3131 | elt->data = (PTR_T *)entry; | |
3132 | } | |
3133 | } | |
3185942a | 3134 | #endif /* DEBUGGER */ |
b80f6443 | 3135 | |
7117c2d2 JA |
3136 | /* Add STRING, which is of the form foo=bar, to the temporary environment |
3137 | HASH_TABLE (temporary_env). The functions in execute_cmd.c are | |
3138 | responsible for moving the main temporary env to one of the other | |
3139 | temporary environments. The expansion code in subst.c calls this. */ | |
3140 | int | |
495aee44 | 3141 | assign_in_env (word, flags) |
95732b49 | 3142 | WORD_DESC *word; |
495aee44 | 3143 | int flags; |
7117c2d2 | 3144 | { |
ac50fbac | 3145 | int offset, aflags; |
a0c0a00f | 3146 | char *name, *temp, *value, *newname; |
7117c2d2 | 3147 | SHELL_VAR *var; |
95732b49 JA |
3148 | const char *string; |
3149 | ||
3150 | string = word->word; | |
7117c2d2 | 3151 | |
ac50fbac | 3152 | aflags = 0; |
b80f6443 | 3153 | offset = assignment (string, 0); |
a0c0a00f | 3154 | newname = name = savestring (string); |
7117c2d2 JA |
3155 | value = (char *)NULL; |
3156 | ||
3157 | if (name[offset] == '=') | |
3158 | { | |
3159 | name[offset] = 0; | |
3160 | ||
ac50fbac | 3161 | /* don't ignore the `+' when assigning temporary environment */ |
95732b49 | 3162 | if (name[offset - 1] == '+') |
ac50fbac CR |
3163 | { |
3164 | name[offset - 1] = '\0'; | |
3165 | aflags |= ASS_APPEND; | |
3166 | } | |
95732b49 | 3167 | |
7117c2d2 | 3168 | var = find_variable (name); |
a0c0a00f CR |
3169 | if (var == 0) |
3170 | { | |
3171 | var = find_variable_last_nameref (name, 1); | |
3172 | /* If we're assigning a value to a nameref variable in the temp | |
3173 | environment, and the value of the nameref is valid for assignment, | |
3174 | but the variable does not already exist, assign to the nameref | |
3175 | target and add the target to the temporary environment. This is | |
3176 | what ksh93 does */ | |
3177 | if (var && nameref_p (var) && valid_nameref_value (nameref_cell (var), 1)) | |
3178 | { | |
3179 | newname = nameref_cell (var); | |
3180 | var = 0; /* don't use it for append */ | |
3181 | } | |
3182 | } | |
3183 | else | |
3184 | newname = name_cell (var); /* no-op if not nameref */ | |
3185 | ||
7117c2d2 JA |
3186 | if (var && (readonly_p (var) || noassign_p (var))) |
3187 | { | |
3188 | if (readonly_p (var)) | |
3189 | err_readonly (name); | |
3190 | free (name); | |
3191 | return (0); | |
3192 | } | |
7117c2d2 | 3193 | temp = name + offset + 1; |
a0c0a00f | 3194 | |
95732b49 | 3195 | value = expand_assignment_string_to_string (temp, 0); |
ac50fbac CR |
3196 | |
3197 | if (var && (aflags & ASS_APPEND)) | |
3198 | { | |
a0c0a00f CR |
3199 | if (value == 0) |
3200 | { | |
3201 | value = (char *)xmalloc (1); /* like do_assignment_internal */ | |
3202 | value[0] = '\0'; | |
3203 | } | |
ac50fbac CR |
3204 | temp = make_variable_value (var, value, aflags); |
3205 | FREE (value); | |
3206 | value = temp; | |
3207 | } | |
7117c2d2 JA |
3208 | } |
3209 | ||
3210 | if (temporary_env == 0) | |
3211 | temporary_env = hash_create (TEMPENV_HASH_BUCKETS); | |
3212 | ||
a0c0a00f | 3213 | var = hash_lookup (newname, temporary_env); |
7117c2d2 | 3214 | if (var == 0) |
a0c0a00f | 3215 | var = make_new_variable (newname, temporary_env); |
7117c2d2 JA |
3216 | else |
3217 | FREE (value_cell (var)); | |
3218 | ||
3219 | if (value == 0) | |
3220 | { | |
a0c0a00f | 3221 | value = (char *)xmalloc (1); /* see above */ |
7117c2d2 JA |
3222 | value[0] = '\0'; |
3223 | } | |
3224 | ||
3225 | var_setvalue (var, value); | |
3226 | var->attributes |= (att_exported|att_tempvar); | |
3227 | var->context = variable_context; /* XXX */ | |
3228 | ||
3229 | INVALIDATE_EXPORTSTR (var); | |
a0c0a00f | 3230 | var->exportstr = mk_env_string (newname, value, 0); |
7117c2d2 JA |
3231 | |
3232 | array_needs_making = 1; | |
3233 | ||
495aee44 | 3234 | if (flags) |
a0c0a00f | 3235 | stupidly_hack_special_variables (newname); |
7117c2d2 JA |
3236 | |
3237 | if (echo_command_at_execute) | |
b80f6443 JA |
3238 | /* The Korn shell prints the `+ ' in front of assignment statements, |
3239 | so we do too. */ | |
3240 | xtrace_print_assignment (name, value, 0, 1); | |
7117c2d2 | 3241 | |
b80f6443 | 3242 | free (name); |
7117c2d2 JA |
3243 | return 1; |
3244 | } | |
3245 | ||
3246 | /* **************************************************************** */ | |
3247 | /* */ | |
3248 | /* Copying variables */ | |
3249 | /* */ | |
3250 | /* **************************************************************** */ | |
3251 | ||
3252 | #ifdef INCLUDE_UNUSED | |
3253 | /* Copy VAR to a new data structure and return that structure. */ | |
3254 | SHELL_VAR * | |
3255 | copy_variable (var) | |
3256 | SHELL_VAR *var; | |
3257 | { | |
3258 | SHELL_VAR *copy = (SHELL_VAR *)NULL; | |
3259 | ||
3260 | if (var) | |
3261 | { | |
3262 | copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
3263 | ||
3264 | copy->attributes = var->attributes; | |
3265 | copy->name = savestring (var->name); | |
3266 | ||
3267 | if (function_p (var)) | |
3268 | var_setfunc (copy, copy_command (function_cell (var))); | |
3269 | #if defined (ARRAY_VARS) | |
3270 | else if (array_p (var)) | |
3185942a JA |
3271 | var_setarray (copy, array_copy (array_cell (var))); |
3272 | else if (assoc_p (var)) | |
3273 | var_setassoc (copy, assoc_copy (assoc_cell (var))); | |
7117c2d2 | 3274 | #endif |
ac50fbac CR |
3275 | else if (nameref_cell (var)) /* XXX - nameref */ |
3276 | var_setref (copy, savestring (nameref_cell (var))); | |
3277 | else if (value_cell (var)) /* XXX - nameref */ | |
7117c2d2 JA |
3278 | var_setvalue (copy, savestring (value_cell (var))); |
3279 | else | |
3280 | var_setvalue (copy, (char *)NULL); | |
3281 | ||
3282 | copy->dynamic_value = var->dynamic_value; | |
3283 | copy->assign_func = var->assign_func; | |
3284 | ||
3285 | copy->exportstr = COPY_EXPORTSTR (var); | |
3286 | ||
3287 | copy->context = var->context; | |
3288 | } | |
3289 | return (copy); | |
3290 | } | |
3291 | #endif | |
3292 | ||
3293 | /* **************************************************************** */ | |
3294 | /* */ | |
3295 | /* Deleting and unsetting variables */ | |
3296 | /* */ | |
3297 | /* **************************************************************** */ | |
3298 | ||
726f6388 | 3299 | /* Dispose of the information attached to VAR. */ |
3185942a JA |
3300 | static void |
3301 | dispose_variable_value (var) | |
726f6388 JA |
3302 | SHELL_VAR *var; |
3303 | { | |
726f6388 | 3304 | if (function_p (var)) |
ccc6cda3 JA |
3305 | dispose_command (function_cell (var)); |
3306 | #if defined (ARRAY_VARS) | |
3307 | else if (array_p (var)) | |
7117c2d2 | 3308 | array_dispose (array_cell (var)); |
3185942a JA |
3309 | else if (assoc_p (var)) |
3310 | assoc_dispose (assoc_cell (var)); | |
ccc6cda3 | 3311 | #endif |
ac50fbac CR |
3312 | else if (nameref_p (var)) |
3313 | FREE (nameref_cell (var)); | |
ccc6cda3 JA |
3314 | else |
3315 | FREE (value_cell (var)); | |
3185942a JA |
3316 | } |
3317 | ||
3318 | void | |
3319 | dispose_variable (var) | |
3320 | SHELL_VAR *var; | |
3321 | { | |
3322 | if (var == 0) | |
3323 | return; | |
3324 | ||
3325 | if (nofree_p (var) == 0) | |
3326 | dispose_variable_value (var); | |
726f6388 | 3327 | |
bb70624e JA |
3328 | FREE_EXPORTSTR (var); |
3329 | ||
726f6388 JA |
3330 | free (var->name); |
3331 | ||
3332 | if (exported_p (var)) | |
3333 | array_needs_making = 1; | |
3334 | ||
3335 | free (var); | |
3336 | } | |
3337 | ||
ac50fbac CR |
3338 | /* Unset the shell variable referenced by NAME. Unsetting a nameref variable |
3339 | unsets the variable it resolves to but leaves the nameref alone. */ | |
ccc6cda3 | 3340 | int |
726f6388 | 3341 | unbind_variable (name) |
f73dda09 | 3342 | const char *name; |
726f6388 | 3343 | { |
ac50fbac CR |
3344 | SHELL_VAR *v, *nv; |
3345 | int r; | |
3346 | ||
3347 | v = var_lookup (name, shell_variables); | |
3348 | nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL; | |
3349 | ||
3350 | r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, shell_variables); | |
3351 | return r; | |
3352 | } | |
3353 | ||
3354 | /* Unbind NAME, where NAME is assumed to be a nameref variable */ | |
3355 | int | |
3356 | unbind_nameref (name) | |
3357 | const char *name; | |
3358 | { | |
3359 | SHELL_VAR *v; | |
3360 | ||
3361 | v = var_lookup (name, shell_variables); | |
3362 | if (v && nameref_p (v)) | |
3363 | return makunbound (name, shell_variables); | |
3364 | return 0; | |
7117c2d2 | 3365 | } |
726f6388 | 3366 | |
a0c0a00f CR |
3367 | /* Unbind the first instance of NAME, whether it's a nameref or not */ |
3368 | int | |
3369 | unbind_variable_noref (name) | |
3370 | const char *name; | |
3371 | { | |
3372 | SHELL_VAR *v; | |
3373 | ||
3374 | v = var_lookup (name, shell_variables); | |
3375 | if (v) | |
3376 | return makunbound (name, shell_variables); | |
3377 | return 0; | |
3378 | } | |
3379 | ||
3380 | int | |
3381 | check_unbind_variable (name) | |
3382 | const char *name; | |
3383 | { | |
3384 | SHELL_VAR *v; | |
3385 | ||
3386 | v = find_variable (name); | |
3387 | if (v && readonly_p (v)) | |
3388 | { | |
3389 | internal_error (_("%s: cannot unset: readonly %s"), name, "variable"); | |
3390 | return -1; | |
3391 | } | |
3392 | return (unbind_variable (name)); | |
3393 | } | |
3394 | ||
7117c2d2 JA |
3395 | /* Unset the shell function named NAME. */ |
3396 | int | |
3397 | unbind_func (name) | |
3398 | const char *name; | |
3399 | { | |
3400 | BUCKET_CONTENTS *elt; | |
3401 | SHELL_VAR *func; | |
726f6388 | 3402 | |
7117c2d2 JA |
3403 | elt = hash_remove (name, shell_functions, 0); |
3404 | ||
3405 | if (elt == 0) | |
3406 | return -1; | |
3407 | ||
3408 | #if defined (PROGRAMMABLE_COMPLETION) | |
3409 | set_itemlist_dirty (&it_functions); | |
ccc6cda3 | 3410 | #endif |
7117c2d2 JA |
3411 | |
3412 | func = (SHELL_VAR *)elt->data; | |
3413 | if (func) | |
726f6388 | 3414 | { |
7117c2d2 JA |
3415 | if (exported_p (func)) |
3416 | array_needs_making++; | |
3417 | dispose_variable (func); | |
726f6388 JA |
3418 | } |
3419 | ||
7117c2d2 JA |
3420 | free (elt->key); |
3421 | free (elt); | |
726f6388 | 3422 | |
7117c2d2 | 3423 | return 0; |
726f6388 JA |
3424 | } |
3425 | ||
3185942a | 3426 | #if defined (DEBUGGER) |
b80f6443 JA |
3427 | int |
3428 | unbind_function_def (name) | |
3429 | const char *name; | |
3430 | { | |
3431 | BUCKET_CONTENTS *elt; | |
3432 | FUNCTION_DEF *funcdef; | |
3433 | ||
3434 | elt = hash_remove (name, shell_function_defs, 0); | |
3435 | ||
3436 | if (elt == 0) | |
3437 | return -1; | |
3438 | ||
3439 | funcdef = (FUNCTION_DEF *)elt->data; | |
3440 | if (funcdef) | |
3441 | dispose_function_def (funcdef); | |
3442 | ||
3443 | free (elt->key); | |
3444 | free (elt); | |
3445 | ||
3446 | return 0; | |
3447 | } | |
3185942a | 3448 | #endif /* DEBUGGER */ |
b80f6443 | 3449 | |
ac50fbac CR |
3450 | int |
3451 | delete_var (name, vc) | |
3452 | const char *name; | |
3453 | VAR_CONTEXT *vc; | |
3454 | { | |
3455 | BUCKET_CONTENTS *elt; | |
3456 | SHELL_VAR *old_var; | |
3457 | VAR_CONTEXT *v; | |
3458 | ||
3459 | for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down) | |
3460 | if (elt = hash_remove (name, v->table, 0)) | |
3461 | break; | |
3462 | ||
3463 | if (elt == 0) | |
3464 | return (-1); | |
3465 | ||
3466 | old_var = (SHELL_VAR *)elt->data; | |
3467 | free (elt->key); | |
3468 | free (elt); | |
3469 | ||
3470 | dispose_variable (old_var); | |
3471 | return (0); | |
3472 | } | |
3473 | ||
726f6388 JA |
3474 | /* Make the variable associated with NAME go away. HASH_LIST is the |
3475 | hash table from which this variable should be deleted (either | |
3476 | shell_variables or shell_functions). | |
3477 | Returns non-zero if the variable couldn't be found. */ | |
ccc6cda3 | 3478 | int |
7117c2d2 | 3479 | makunbound (name, vc) |
f73dda09 | 3480 | const char *name; |
7117c2d2 | 3481 | VAR_CONTEXT *vc; |
726f6388 | 3482 | { |
d166f048 | 3483 | BUCKET_CONTENTS *elt, *new_elt; |
7117c2d2 JA |
3484 | SHELL_VAR *old_var; |
3485 | VAR_CONTEXT *v; | |
726f6388 JA |
3486 | char *t; |
3487 | ||
7117c2d2 JA |
3488 | for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down) |
3489 | if (elt = hash_remove (name, v->table, 0)) | |
3490 | break; | |
726f6388 | 3491 | |
d166f048 | 3492 | if (elt == 0) |
726f6388 JA |
3493 | return (-1); |
3494 | ||
3495 | old_var = (SHELL_VAR *)elt->data; | |
726f6388 JA |
3496 | |
3497 | if (old_var && exported_p (old_var)) | |
3498 | array_needs_making++; | |
3499 | ||
ccc6cda3 | 3500 | /* If we're unsetting a local variable and we're still executing inside |
7117c2d2 JA |
3501 | the function, just mark the variable as invisible. The function |
3502 | eventually called by pop_var_context() will clean it up later. This | |
3503 | must be done so that if the variable is subsequently assigned a new | |
3504 | value inside the function, the `local' attribute is still present. | |
3505 | We also need to add it back into the correct hash table. */ | |
ccc6cda3 JA |
3506 | if (old_var && local_p (old_var) && variable_context == old_var->context) |
3507 | { | |
3185942a JA |
3508 | if (nofree_p (old_var)) |
3509 | var_setvalue (old_var, (char *)NULL); | |
95732b49 | 3510 | #if defined (ARRAY_VARS) |
3185942a | 3511 | else if (array_p (old_var)) |
95732b49 | 3512 | array_dispose (array_cell (old_var)); |
3185942a JA |
3513 | else if (assoc_p (old_var)) |
3514 | assoc_dispose (assoc_cell (old_var)); | |
95732b49 | 3515 | #endif |
ac50fbac CR |
3516 | else if (nameref_p (old_var)) |
3517 | FREE (nameref_cell (old_var)); | |
3185942a | 3518 | else |
95732b49 | 3519 | FREE (value_cell (old_var)); |
b80f6443 | 3520 | /* Reset the attributes. Preserve the export attribute if the variable |
3185942a JA |
3521 | came from a temporary environment. Make sure it stays local, and |
3522 | make it invisible. */ | |
b80f6443 JA |
3523 | old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0; |
3524 | VSETATTR (old_var, att_local); | |
bb70624e | 3525 | VSETATTR (old_var, att_invisible); |
7117c2d2 | 3526 | var_setvalue (old_var, (char *)NULL); |
bb70624e | 3527 | INVALIDATE_EXPORTSTR (old_var); |
7117c2d2 JA |
3528 | |
3529 | new_elt = hash_insert (savestring (old_var->name), v->table, 0); | |
3530 | new_elt->data = (PTR_T)old_var; | |
ccc6cda3 | 3531 | stupidly_hack_special_variables (old_var->name); |
7117c2d2 | 3532 | |
d166f048 JA |
3533 | free (elt->key); |
3534 | free (elt); | |
ccc6cda3 JA |
3535 | return (0); |
3536 | } | |
3537 | ||
726f6388 JA |
3538 | /* Have to save a copy of name here, because it might refer to |
3539 | old_var->name. If so, stupidly_hack_special_variables will | |
3540 | reference freed memory. */ | |
3541 | t = savestring (name); | |
3542 | ||
3543 | free (elt->key); | |
3544 | free (elt); | |
3545 | ||
3546 | dispose_variable (old_var); | |
3547 | stupidly_hack_special_variables (t); | |
3548 | free (t); | |
7117c2d2 | 3549 | |
726f6388 JA |
3550 | return (0); |
3551 | } | |
3552 | ||
7117c2d2 JA |
3553 | /* Get rid of all of the variables in the current context. */ |
3554 | void | |
3555 | kill_all_local_variables () | |
726f6388 | 3556 | { |
7117c2d2 JA |
3557 | VAR_CONTEXT *vc; |
3558 | ||
3559 | for (vc = shell_variables; vc; vc = vc->down) | |
3560 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
3561 | break; | |
3562 | if (vc == 0) | |
3563 | return; /* XXX */ | |
726f6388 | 3564 | |
7117c2d2 | 3565 | if (vc->table && vc_haslocals (vc)) |
726f6388 | 3566 | { |
7117c2d2 JA |
3567 | delete_all_variables (vc->table); |
3568 | hash_dispose (vc->table); | |
726f6388 | 3569 | } |
7117c2d2 | 3570 | vc->table = (HASH_TABLE *)NULL; |
726f6388 JA |
3571 | } |
3572 | ||
ccc6cda3 JA |
3573 | static void |
3574 | free_variable_hash_data (data) | |
f73dda09 | 3575 | PTR_T data; |
ccc6cda3 | 3576 | { |
7117c2d2 | 3577 | SHELL_VAR *var; |
ccc6cda3 JA |
3578 | |
3579 | var = (SHELL_VAR *)data; | |
7117c2d2 | 3580 | dispose_variable (var); |
ccc6cda3 JA |
3581 | } |
3582 | ||
726f6388 JA |
3583 | /* Delete the entire contents of the hash table. */ |
3584 | void | |
3585 | delete_all_variables (hashed_vars) | |
3586 | HASH_TABLE *hashed_vars; | |
3587 | { | |
7117c2d2 | 3588 | hash_flush (hashed_vars, free_variable_hash_data); |
726f6388 JA |
3589 | } |
3590 | ||
7117c2d2 JA |
3591 | /* **************************************************************** */ |
3592 | /* */ | |
3593 | /* Setting variable attributes */ | |
3594 | /* */ | |
3595 | /* **************************************************************** */ | |
726f6388 | 3596 | |
ccc6cda3 JA |
3597 | #define FIND_OR_MAKE_VARIABLE(name, entry) \ |
3598 | do \ | |
3599 | { \ | |
3600 | entry = find_variable (name); \ | |
3601 | if (!entry) \ | |
3602 | { \ | |
95732b49 | 3603 | entry = bind_variable (name, "", 0); \ |
495aee44 | 3604 | if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \ |
ccc6cda3 JA |
3605 | } \ |
3606 | } \ | |
3607 | while (0) | |
3608 | ||
3609 | /* Make the variable associated with NAME be readonly. | |
726f6388 JA |
3610 | If NAME does not exist yet, create it. */ |
3611 | void | |
3612 | set_var_read_only (name) | |
3613 | char *name; | |
3614 | { | |
ccc6cda3 | 3615 | SHELL_VAR *entry; |
726f6388 | 3616 | |
ccc6cda3 | 3617 | FIND_OR_MAKE_VARIABLE (name, entry); |
bb70624e | 3618 | VSETATTR (entry, att_readonly); |
726f6388 JA |
3619 | } |
3620 | ||
cce855bc | 3621 | #ifdef INCLUDE_UNUSED |
ccc6cda3 | 3622 | /* Make the function associated with NAME be readonly. |
726f6388 JA |
3623 | If NAME does not exist, we just punt, like auto_export code below. */ |
3624 | void | |
3625 | set_func_read_only (name) | |
f73dda09 | 3626 | const char *name; |
726f6388 | 3627 | { |
d166f048 | 3628 | SHELL_VAR *entry; |
726f6388 | 3629 | |
d166f048 | 3630 | entry = find_function (name); |
726f6388 | 3631 | if (entry) |
bb70624e | 3632 | VSETATTR (entry, att_readonly); |
726f6388 JA |
3633 | } |
3634 | ||
3635 | /* Make the variable associated with NAME be auto-exported. | |
3636 | If NAME does not exist yet, create it. */ | |
3637 | void | |
3638 | set_var_auto_export (name) | |
3639 | char *name; | |
3640 | { | |
ccc6cda3 | 3641 | SHELL_VAR *entry; |
726f6388 | 3642 | |
ccc6cda3 | 3643 | FIND_OR_MAKE_VARIABLE (name, entry); |
726f6388 JA |
3644 | set_auto_export (entry); |
3645 | } | |
3646 | ||
3647 | /* Make the function associated with NAME be auto-exported. */ | |
3648 | void | |
3649 | set_func_auto_export (name) | |
f73dda09 | 3650 | const char *name; |
726f6388 | 3651 | { |
ccc6cda3 | 3652 | SHELL_VAR *entry; |
726f6388 | 3653 | |
ccc6cda3 | 3654 | entry = find_function (name); |
726f6388 | 3655 | if (entry) |
ccc6cda3 JA |
3656 | set_auto_export (entry); |
3657 | } | |
cce855bc | 3658 | #endif |
ccc6cda3 | 3659 | |
7117c2d2 JA |
3660 | /* **************************************************************** */ |
3661 | /* */ | |
3662 | /* Creating lists of variables */ | |
3663 | /* */ | |
3664 | /* **************************************************************** */ | |
3665 | ||
3666 | static VARLIST * | |
3667 | vlist_alloc (nentries) | |
3668 | int nentries; | |
726f6388 | 3669 | { |
7117c2d2 | 3670 | VARLIST *vlist; |
726f6388 | 3671 | |
7117c2d2 JA |
3672 | vlist = (VARLIST *)xmalloc (sizeof (VARLIST)); |
3673 | vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *)); | |
3674 | vlist->list_size = nentries; | |
3675 | vlist->list_len = 0; | |
3676 | vlist->list[0] = (SHELL_VAR *)NULL; | |
726f6388 | 3677 | |
7117c2d2 JA |
3678 | return vlist; |
3679 | } | |
726f6388 | 3680 | |
7117c2d2 JA |
3681 | static VARLIST * |
3682 | vlist_realloc (vlist, n) | |
3683 | VARLIST *vlist; | |
3684 | int n; | |
3685 | { | |
3686 | if (vlist == 0) | |
3687 | return (vlist = vlist_alloc (n)); | |
3688 | if (n > vlist->list_size) | |
726f6388 | 3689 | { |
7117c2d2 JA |
3690 | vlist->list_size = n; |
3691 | vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *)); | |
3692 | } | |
3693 | return vlist; | |
3694 | } | |
726f6388 | 3695 | |
7117c2d2 JA |
3696 | static void |
3697 | vlist_add (vlist, var, flags) | |
3698 | VARLIST *vlist; | |
3699 | SHELL_VAR *var; | |
3700 | int flags; | |
3701 | { | |
3702 | register int i; | |
ccc6cda3 | 3703 | |
7117c2d2 JA |
3704 | for (i = 0; i < vlist->list_len; i++) |
3705 | if (STREQ (var->name, vlist->list[i]->name)) | |
3706 | break; | |
3707 | if (i < vlist->list_len) | |
3708 | return; | |
3709 | ||
3710 | if (i >= vlist->list_size) | |
3711 | vlist = vlist_realloc (vlist, vlist->list_size + 16); | |
726f6388 | 3712 | |
7117c2d2 JA |
3713 | vlist->list[vlist->list_len++] = var; |
3714 | vlist->list[vlist->list_len] = (SHELL_VAR *)NULL; | |
3715 | } | |
3716 | ||
3717 | /* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the | |
3718 | variables for which FUNCTION returns a non-zero value. A NULL value | |
3719 | for FUNCTION means to use all variables. */ | |
3720 | SHELL_VAR ** | |
3721 | map_over (function, vc) | |
3722 | sh_var_map_func_t *function; | |
3723 | VAR_CONTEXT *vc; | |
3724 | { | |
3725 | VAR_CONTEXT *v; | |
3726 | VARLIST *vlist; | |
3727 | SHELL_VAR **ret; | |
3728 | int nentries; | |
3729 | ||
3730 | for (nentries = 0, v = vc; v; v = v->down) | |
3731 | nentries += HASH_ENTRIES (v->table); | |
3732 | ||
3733 | if (nentries == 0) | |
3734 | return (SHELL_VAR **)NULL; | |
3735 | ||
3736 | vlist = vlist_alloc (nentries); | |
3737 | ||
3738 | for (v = vc; v; v = v->down) | |
3739 | flatten (v->table, function, vlist, 0); | |
3740 | ||
3741 | ret = vlist->list; | |
3742 | free (vlist); | |
3743 | return ret; | |
3744 | } | |
3745 | ||
3746 | SHELL_VAR ** | |
3747 | map_over_funcs (function) | |
3748 | sh_var_map_func_t *function; | |
3749 | { | |
3750 | VARLIST *vlist; | |
3751 | SHELL_VAR **ret; | |
3752 | ||
3753 | if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0) | |
3754 | return ((SHELL_VAR **)NULL); | |
3755 | ||
3756 | vlist = vlist_alloc (HASH_ENTRIES (shell_functions)); | |
3757 | ||
3758 | flatten (shell_functions, function, vlist, 0); | |
3759 | ||
3760 | ret = vlist->list; | |
3761 | free (vlist); | |
3762 | return ret; | |
3763 | } | |
3764 | ||
3765 | /* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those | |
3766 | elements for which FUNC succeeds to VLIST->list. FLAGS is reserved | |
3767 | for future use. Only unique names are added to VLIST. If FUNC is | |
3768 | NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is | |
3769 | NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST | |
3770 | and FUNC are both NULL, nothing happens. */ | |
3771 | static void | |
3772 | flatten (var_hash_table, func, vlist, flags) | |
3773 | HASH_TABLE *var_hash_table; | |
3774 | sh_var_map_func_t *func; | |
3775 | VARLIST *vlist; | |
3776 | int flags; | |
3777 | { | |
3778 | register int i; | |
3779 | register BUCKET_CONTENTS *tlist; | |
3780 | int r; | |
3781 | SHELL_VAR *var; | |
3782 | ||
3783 | if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0)) | |
3784 | return; | |
3785 | ||
3786 | for (i = 0; i < var_hash_table->nbuckets; i++) | |
3787 | { | |
3788 | for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next) | |
3789 | { | |
3790 | var = (SHELL_VAR *)tlist->data; | |
3791 | ||
3792 | r = func ? (*func) (var) : 1; | |
3793 | if (r && vlist) | |
3794 | vlist_add (vlist, var, flags); | |
3795 | } | |
726f6388 | 3796 | } |
7117c2d2 JA |
3797 | } |
3798 | ||
3799 | void | |
3800 | sort_variables (array) | |
3801 | SHELL_VAR **array; | |
3802 | { | |
3803 | qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp); | |
726f6388 JA |
3804 | } |
3805 | ||
3806 | static int | |
7117c2d2 JA |
3807 | qsort_var_comp (var1, var2) |
3808 | SHELL_VAR **var1, **var2; | |
726f6388 | 3809 | { |
7117c2d2 JA |
3810 | int result; |
3811 | ||
3812 | if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0) | |
3813 | result = strcmp ((*var1)->name, (*var2)->name); | |
3814 | ||
3815 | return (result); | |
726f6388 JA |
3816 | } |
3817 | ||
7117c2d2 JA |
3818 | /* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for |
3819 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
ccc6cda3 | 3820 | static SHELL_VAR ** |
7117c2d2 JA |
3821 | vapply (func) |
3822 | sh_var_map_func_t *func; | |
726f6388 JA |
3823 | { |
3824 | SHELL_VAR **list; | |
3825 | ||
7117c2d2 | 3826 | list = map_over (func, shell_variables); |
d166f048 | 3827 | if (list /* && posixly_correct */) |
726f6388 | 3828 | sort_variables (list); |
7117c2d2 JA |
3829 | return (list); |
3830 | } | |
726f6388 | 3831 | |
7117c2d2 JA |
3832 | /* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for |
3833 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
3834 | static SHELL_VAR ** | |
3835 | fapply (func) | |
3836 | sh_var_map_func_t *func; | |
3837 | { | |
3838 | SHELL_VAR **list; | |
3839 | ||
3840 | list = map_over_funcs (func); | |
3841 | if (list /* && posixly_correct */) | |
3842 | sort_variables (list); | |
726f6388 JA |
3843 | return (list); |
3844 | } | |
3845 | ||
7117c2d2 JA |
3846 | /* Create a NULL terminated array of all the shell variables. */ |
3847 | SHELL_VAR ** | |
3848 | all_shell_variables () | |
3849 | { | |
3850 | return (vapply ((sh_var_map_func_t *)NULL)); | |
3851 | } | |
3852 | ||
3853 | /* Create a NULL terminated array of all the shell functions. */ | |
3854 | SHELL_VAR ** | |
3855 | all_shell_functions () | |
3856 | { | |
3857 | return (fapply ((sh_var_map_func_t *)NULL)); | |
3858 | } | |
3859 | ||
3860 | static int | |
3861 | visible_var (var) | |
3862 | SHELL_VAR *var; | |
3863 | { | |
3864 | return (invisible_p (var) == 0); | |
3865 | } | |
3866 | ||
726f6388 | 3867 | SHELL_VAR ** |
bb70624e | 3868 | all_visible_functions () |
726f6388 | 3869 | { |
7117c2d2 | 3870 | return (fapply (visible_var)); |
ccc6cda3 | 3871 | } |
726f6388 | 3872 | |
ccc6cda3 | 3873 | SHELL_VAR ** |
bb70624e | 3874 | all_visible_variables () |
ccc6cda3 | 3875 | { |
7117c2d2 | 3876 | return (vapply (visible_var)); |
726f6388 JA |
3877 | } |
3878 | ||
ccc6cda3 JA |
3879 | /* Return non-zero if the variable VAR is visible and exported. Array |
3880 | variables cannot be exported. */ | |
726f6388 JA |
3881 | static int |
3882 | visible_and_exported (var) | |
3883 | SHELL_VAR *var; | |
3884 | { | |
ccc6cda3 | 3885 | return (invisible_p (var) == 0 && exported_p (var)); |
726f6388 JA |
3886 | } |
3887 | ||
89a92869 CR |
3888 | /* Candidate variables for the export environment are either valid variables |
3889 | with the export attribute or invalid variables inherited from the initial | |
3890 | environment and simply passed through. */ | |
3891 | static int | |
3892 | export_environment_candidate (var) | |
3893 | SHELL_VAR *var; | |
3894 | { | |
3895 | return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var))); | |
3896 | } | |
3897 | ||
7117c2d2 JA |
3898 | /* Return non-zero if VAR is a local variable in the current context and |
3899 | is exported. */ | |
3900 | static int | |
3901 | local_and_exported (var) | |
3902 | SHELL_VAR *var; | |
3903 | { | |
3904 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var)); | |
3905 | } | |
3906 | ||
bb70624e JA |
3907 | SHELL_VAR ** |
3908 | all_exported_variables () | |
3909 | { | |
7117c2d2 JA |
3910 | return (vapply (visible_and_exported)); |
3911 | } | |
bb70624e | 3912 | |
7117c2d2 JA |
3913 | SHELL_VAR ** |
3914 | local_exported_variables () | |
3915 | { | |
3916 | return (vapply (local_and_exported)); | |
3917 | } | |
3918 | ||
3919 | static int | |
3920 | variable_in_context (var) | |
3921 | SHELL_VAR *var; | |
3922 | { | |
3923 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context); | |
3924 | } | |
3925 | ||
3926 | SHELL_VAR ** | |
3927 | all_local_variables () | |
3928 | { | |
3929 | VARLIST *vlist; | |
3930 | SHELL_VAR **ret; | |
3931 | VAR_CONTEXT *vc; | |
3932 | ||
3933 | vc = shell_variables; | |
3934 | for (vc = shell_variables; vc; vc = vc->down) | |
3935 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
3936 | break; | |
3937 | ||
3938 | if (vc == 0) | |
3939 | { | |
b80f6443 | 3940 | internal_error (_("all_local_variables: no function context at current scope")); |
7117c2d2 JA |
3941 | return (SHELL_VAR **)NULL; |
3942 | } | |
3943 | if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0) | |
3944 | return (SHELL_VAR **)NULL; | |
3945 | ||
3946 | vlist = vlist_alloc (HASH_ENTRIES (vc->table)); | |
3947 | ||
3948 | flatten (vc->table, variable_in_context, vlist, 0); | |
3949 | ||
3950 | ret = vlist->list; | |
3951 | free (vlist); | |
3952 | if (ret) | |
3953 | sort_variables (ret); | |
3954 | return ret; | |
bb70624e JA |
3955 | } |
3956 | ||
3957 | #if defined (ARRAY_VARS) | |
3958 | /* Return non-zero if the variable VAR is visible and an array. */ | |
3959 | static int | |
3960 | visible_array_vars (var) | |
3961 | SHELL_VAR *var; | |
3962 | { | |
3963 | return (invisible_p (var) == 0 && array_p (var)); | |
3964 | } | |
3965 | ||
3966 | SHELL_VAR ** | |
3967 | all_array_variables () | |
3968 | { | |
7117c2d2 | 3969 | return (vapply (visible_array_vars)); |
bb70624e JA |
3970 | } |
3971 | #endif /* ARRAY_VARS */ | |
3972 | ||
3973 | char ** | |
3974 | all_variables_matching_prefix (prefix) | |
f73dda09 | 3975 | const char *prefix; |
bb70624e JA |
3976 | { |
3977 | SHELL_VAR **varlist; | |
3978 | char **rlist; | |
3979 | int vind, rind, plen; | |
3980 | ||
3981 | plen = STRLEN (prefix); | |
3982 | varlist = all_visible_variables (); | |
3983 | for (vind = 0; varlist && varlist[vind]; vind++) | |
3984 | ; | |
3985 | if (varlist == 0 || vind == 0) | |
3986 | return ((char **)NULL); | |
7117c2d2 | 3987 | rlist = strvec_create (vind + 1); |
bb70624e JA |
3988 | for (vind = rind = 0; varlist[vind]; vind++) |
3989 | { | |
3990 | if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen)) | |
28ef6c31 | 3991 | rlist[rind++] = savestring (varlist[vind]->name); |
bb70624e JA |
3992 | } |
3993 | rlist[rind] = (char *)0; | |
3994 | free (varlist); | |
3995 | ||
3996 | return rlist; | |
3997 | } | |
3998 | ||
7117c2d2 JA |
3999 | /* **************************************************************** */ |
4000 | /* */ | |
4001 | /* Managing temporary variable scopes */ | |
4002 | /* */ | |
4003 | /* **************************************************************** */ | |
4004 | ||
4005 | /* Make variable NAME have VALUE in the temporary environment. */ | |
4006 | static SHELL_VAR * | |
4007 | bind_tempenv_variable (name, value) | |
4008 | const char *name; | |
4009 | char *value; | |
4010 | { | |
4011 | SHELL_VAR *var; | |
4012 | ||
4013 | var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL; | |
4014 | ||
4015 | if (var) | |
4016 | { | |
4017 | FREE (value_cell (var)); | |
4018 | var_setvalue (var, savestring (value)); | |
4019 | INVALIDATE_EXPORTSTR (var); | |
4020 | } | |
4021 | ||
4022 | return (var); | |
4023 | } | |
4024 | ||
4025 | /* Find a variable in the temporary environment that is named NAME. | |
4026 | Return the SHELL_VAR *, or NULL if not found. */ | |
4027 | SHELL_VAR * | |
4028 | find_tempenv_variable (name) | |
4029 | const char *name; | |
4030 | { | |
4031 | return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL); | |
4032 | } | |
4033 | ||
495aee44 CR |
4034 | char **tempvar_list; |
4035 | int tvlist_ind; | |
4036 | ||
7117c2d2 JA |
4037 | /* Push the variable described by (SHELL_VAR *)DATA down to the next |
4038 | variable context from the temporary environment. */ | |
4039 | static void | |
4040 | push_temp_var (data) | |
4041 | PTR_T data; | |
4042 | { | |
4043 | SHELL_VAR *var, *v; | |
4044 | HASH_TABLE *binding_table; | |
4045 | ||
4046 | var = (SHELL_VAR *)data; | |
4047 | ||
4048 | binding_table = shell_variables->table; | |
4049 | if (binding_table == 0) | |
4050 | { | |
4051 | if (shell_variables == global_variables) | |
4052 | /* shouldn't happen */ | |
a0c0a00f | 4053 | binding_table = shell_variables->table = global_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
7117c2d2 JA |
4054 | else |
4055 | binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS); | |
4056 | } | |
4057 | ||
a0c0a00f | 4058 | v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, ASS_FORCE); |
7117c2d2 JA |
4059 | |
4060 | /* XXX - should we set the context here? It shouldn't matter because of how | |
4061 | assign_in_env works, but might want to check. */ | |
4062 | if (binding_table == global_variables->table) /* XXX */ | |
4063 | var->attributes &= ~(att_tempvar|att_propagate); | |
4064 | else | |
4065 | { | |
4066 | var->attributes |= att_propagate; | |
4067 | if (binding_table == shell_variables->table) | |
4068 | shell_variables->flags |= VC_HASTMPVAR; | |
4069 | } | |
a0c0a00f CR |
4070 | if (v) |
4071 | v->attributes |= var->attributes; | |
7117c2d2 | 4072 | |
495aee44 CR |
4073 | if (find_special_var (var->name) >= 0) |
4074 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
4075 | ||
7117c2d2 JA |
4076 | dispose_variable (var); |
4077 | } | |
4078 | ||
4079 | static void | |
4080 | propagate_temp_var (data) | |
4081 | PTR_T data; | |
4082 | { | |
4083 | SHELL_VAR *var; | |
4084 | ||
4085 | var = (SHELL_VAR *)data; | |
4086 | if (tempvar_p (var) && (var->attributes & att_propagate)) | |
4087 | push_temp_var (data); | |
4088 | else | |
495aee44 CR |
4089 | { |
4090 | if (find_special_var (var->name) >= 0) | |
4091 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
4092 | dispose_variable (var); | |
4093 | } | |
7117c2d2 JA |
4094 | } |
4095 | ||
4096 | /* Free the storage used in the hash table for temporary | |
4097 | environment variables. PUSHF is a function to be called | |
4098 | to free each hash table entry. It takes care of pushing variables | |
495aee44 CR |
4099 | to previous scopes if appropriate. PUSHF stores names of variables |
4100 | that require special handling (e.g., IFS) on tempvar_list, so this | |
4101 | function can call stupidly_hack_special_variables on all the | |
4102 | variables in the list when the temporary hash table is destroyed. */ | |
7117c2d2 JA |
4103 | static void |
4104 | dispose_temporary_env (pushf) | |
4105 | sh_free_func_t *pushf; | |
4106 | { | |
495aee44 CR |
4107 | int i; |
4108 | ||
4109 | tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1); | |
4110 | tempvar_list[tvlist_ind = 0] = 0; | |
4111 | ||
7117c2d2 JA |
4112 | hash_flush (temporary_env, pushf); |
4113 | hash_dispose (temporary_env); | |
3185942a | 4114 | temporary_env = (HASH_TABLE *)NULL; |
7117c2d2 | 4115 | |
495aee44 CR |
4116 | tempvar_list[tvlist_ind] = 0; |
4117 | ||
7117c2d2 JA |
4118 | array_needs_making = 1; |
4119 | ||
495aee44 CR |
4120 | #if 0 |
4121 | sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */ | |
4122 | #endif | |
4123 | for (i = 0; i < tvlist_ind; i++) | |
4124 | stupidly_hack_special_variables (tempvar_list[i]); | |
4125 | ||
4126 | strvec_dispose (tempvar_list); | |
4127 | tempvar_list = 0; | |
4128 | tvlist_ind = 0; | |
7117c2d2 JA |
4129 | } |
4130 | ||
4131 | void | |
4132 | dispose_used_env_vars () | |
4133 | { | |
4134 | if (temporary_env) | |
0628567a JA |
4135 | { |
4136 | dispose_temporary_env (propagate_temp_var); | |
4137 | maybe_make_export_env (); | |
4138 | } | |
7117c2d2 JA |
4139 | } |
4140 | ||
4141 | /* Take all of the shell variables in the temporary environment HASH_TABLE | |
4142 | and make shell variables from them at the current variable context. */ | |
4143 | void | |
4144 | merge_temporary_env () | |
4145 | { | |
4146 | if (temporary_env) | |
4147 | dispose_temporary_env (push_temp_var); | |
4148 | } | |
4149 | ||
a0c0a00f CR |
4150 | void |
4151 | flush_temporary_env () | |
4152 | { | |
4153 | if (temporary_env) | |
4154 | { | |
4155 | hash_flush (temporary_env, free_variable_hash_data); | |
4156 | hash_dispose (temporary_env); | |
4157 | temporary_env = (HASH_TABLE *)NULL; | |
4158 | } | |
4159 | } | |
4160 | ||
7117c2d2 JA |
4161 | /* **************************************************************** */ |
4162 | /* */ | |
4163 | /* Creating and manipulating the environment */ | |
4164 | /* */ | |
4165 | /* **************************************************************** */ | |
4166 | ||
bb70624e | 4167 | static inline char * |
3590145a | 4168 | mk_env_string (name, value, isfunc) |
f73dda09 | 4169 | const char *name, *value; |
3590145a | 4170 | int isfunc; |
bb70624e | 4171 | { |
3590145a CR |
4172 | size_t name_len, value_len; |
4173 | char *p, *q; | |
bb70624e JA |
4174 | |
4175 | name_len = strlen (name); | |
4176 | value_len = STRLEN (value); | |
3590145a CR |
4177 | |
4178 | /* If we are exporting a shell function, construct the encoded function | |
4179 | name. */ | |
4180 | if (isfunc && value) | |
4181 | { | |
4182 | p = (char *)xmalloc (BASHFUNC_PREFLEN + name_len + BASHFUNC_SUFFLEN + value_len + 2); | |
4183 | q = p; | |
4184 | memcpy (q, BASHFUNC_PREFIX, BASHFUNC_PREFLEN); | |
4185 | q += BASHFUNC_PREFLEN; | |
4186 | memcpy (q, name, name_len); | |
4187 | q += name_len; | |
4188 | memcpy (q, BASHFUNC_SUFFIX, BASHFUNC_SUFFLEN); | |
4189 | q += BASHFUNC_SUFFLEN; | |
4190 | } | |
4191 | else | |
4192 | { | |
4193 | p = (char *)xmalloc (2 + name_len + value_len); | |
4194 | memcpy (p, name, name_len); | |
4195 | q = p + name_len; | |
4196 | } | |
4197 | ||
4198 | q[0] = '='; | |
bb70624e | 4199 | if (value && *value) |
3590145a | 4200 | memcpy (q + 1, value, value_len + 1); |
bb70624e | 4201 | else |
3590145a CR |
4202 | q[1] = '\0'; |
4203 | ||
bb70624e JA |
4204 | return (p); |
4205 | } | |
4206 | ||
f73dda09 | 4207 | #ifdef DEBUG |
bb70624e JA |
4208 | /* Debugging */ |
4209 | static int | |
4210 | valid_exportstr (v) | |
4211 | SHELL_VAR *v; | |
4212 | { | |
4213 | char *s; | |
4214 | ||
4215 | s = v->exportstr; | |
0001803f CR |
4216 | if (s == 0) |
4217 | { | |
4218 | internal_error (_("%s has null exportstr"), v->name); | |
4219 | return (0); | |
4220 | } | |
f73dda09 | 4221 | if (legal_variable_starter ((unsigned char)*s) == 0) |
bb70624e | 4222 | { |
b80f6443 | 4223 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
4224 | return (0); |
4225 | } | |
4226 | for (s = v->exportstr + 1; s && *s; s++) | |
4227 | { | |
4228 | if (*s == '=') | |
28ef6c31 | 4229 | break; |
f73dda09 | 4230 | if (legal_variable_char ((unsigned char)*s) == 0) |
bb70624e | 4231 | { |
b80f6443 | 4232 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
4233 | return (0); |
4234 | } | |
4235 | } | |
4236 | if (*s != '=') | |
4237 | { | |
b80f6443 | 4238 | internal_error (_("no `=' in exportstr for %s"), v->name); |
bb70624e JA |
4239 | return (0); |
4240 | } | |
4241 | return (1); | |
4242 | } | |
f73dda09 | 4243 | #endif |
bb70624e | 4244 | |
7117c2d2 JA |
4245 | static char ** |
4246 | make_env_array_from_var_list (vars) | |
4247 | SHELL_VAR **vars; | |
726f6388 JA |
4248 | { |
4249 | register int i, list_index; | |
4250 | register SHELL_VAR *var; | |
ccc6cda3 | 4251 | char **list, *value; |
726f6388 | 4252 | |
7117c2d2 | 4253 | list = strvec_create ((1 + strvec_len ((char **)vars))); |
bb70624e JA |
4254 | |
4255 | #define USE_EXPORTSTR (value == var->exportstr) | |
726f6388 JA |
4256 | |
4257 | for (i = 0, list_index = 0; var = vars[i]; i++) | |
4258 | { | |
28ef6c31 JA |
4259 | #if defined (__CYGWIN__) |
4260 | /* We don't use the exportstr stuff on Cygwin at all. */ | |
4261 | INVALIDATE_EXPORTSTR (var); | |
bb70624e | 4262 | #endif |
28ef6c31 JA |
4263 | if (var->exportstr) |
4264 | value = var->exportstr; | |
bb70624e | 4265 | else if (function_p (var)) |
ccc6cda3 JA |
4266 | value = named_function_string ((char *)NULL, function_cell (var), 0); |
4267 | #if defined (ARRAY_VARS) | |
4268 | else if (array_p (var)) | |
ac50fbac | 4269 | # if ARRAY_EXPORT |
a0c0a00f | 4270 | value = array_to_assign (array_cell (var), 0); |
ccc6cda3 JA |
4271 | # else |
4272 | continue; /* XXX array vars cannot yet be exported */ | |
ac50fbac | 4273 | # endif /* ARRAY_EXPORT */ |
3185942a JA |
4274 | else if (assoc_p (var)) |
4275 | # if 0 | |
a0c0a00f | 4276 | value = assoc_to_assign (assoc_cell (var), 0); |
3185942a JA |
4277 | # else |
4278 | continue; /* XXX associative array vars cannot yet be exported */ | |
ccc6cda3 JA |
4279 | # endif |
4280 | #endif | |
726f6388 JA |
4281 | else |
4282 | value = value_cell (var); | |
4283 | ||
4284 | if (value) | |
4285 | { | |
bb70624e JA |
4286 | /* Gee, I'd like to get away with not using savestring() if we're |
4287 | using the cached exportstr... */ | |
4288 | list[list_index] = USE_EXPORTSTR ? savestring (value) | |
3590145a | 4289 | : mk_env_string (var->name, value, function_p (var)); |
bb70624e | 4290 | |
7117c2d2 JA |
4291 | if (USE_EXPORTSTR == 0) |
4292 | SAVE_EXPORTSTR (var, list[list_index]); | |
4293 | ||
726f6388 | 4294 | list_index++; |
bb70624e JA |
4295 | #undef USE_EXPORTSTR |
4296 | ||
4297 | #if 0 /* not yet */ | |
ccc6cda3 | 4298 | #if defined (ARRAY_VARS) |
3185942a | 4299 | if (array_p (var) || assoc_p (var)) |
ccc6cda3 | 4300 | free (value); |
bb70624e | 4301 | #endif |
ccc6cda3 | 4302 | #endif |
726f6388 JA |
4303 | } |
4304 | } | |
4305 | ||
726f6388 JA |
4306 | list[list_index] = (char *)NULL; |
4307 | return (list); | |
4308 | } | |
4309 | ||
7117c2d2 JA |
4310 | /* Make an array of assignment statements from the hash table |
4311 | HASHED_VARS which contains SHELL_VARs. Only visible, exported | |
4312 | variables are eligible. */ | |
4313 | static char ** | |
4314 | make_var_export_array (vcxt) | |
4315 | VAR_CONTEXT *vcxt; | |
726f6388 | 4316 | { |
7117c2d2 JA |
4317 | char **list; |
4318 | SHELL_VAR **vars; | |
726f6388 | 4319 | |
89a92869 | 4320 | #if 0 |
7117c2d2 | 4321 | vars = map_over (visible_and_exported, vcxt); |
89a92869 CR |
4322 | #else |
4323 | vars = map_over (export_environment_candidate, vcxt); | |
4324 | #endif | |
726f6388 | 4325 | |
7117c2d2 JA |
4326 | if (vars == 0) |
4327 | return (char **)NULL; | |
ccc6cda3 | 4328 | |
7117c2d2 | 4329 | list = make_env_array_from_var_list (vars); |
ccc6cda3 | 4330 | |
7117c2d2 JA |
4331 | free (vars); |
4332 | return (list); | |
ccc6cda3 JA |
4333 | } |
4334 | ||
7117c2d2 JA |
4335 | static char ** |
4336 | make_func_export_array () | |
726f6388 | 4337 | { |
7117c2d2 JA |
4338 | char **list; |
4339 | SHELL_VAR **vars; | |
ccc6cda3 | 4340 | |
7117c2d2 JA |
4341 | vars = map_over_funcs (visible_and_exported); |
4342 | if (vars == 0) | |
4343 | return (char **)NULL; | |
726f6388 | 4344 | |
7117c2d2 | 4345 | list = make_env_array_from_var_list (vars); |
28ef6c31 | 4346 | |
7117c2d2 JA |
4347 | free (vars); |
4348 | return (list); | |
bb70624e JA |
4349 | } |
4350 | ||
d166f048 JA |
4351 | /* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */ |
4352 | #define add_to_export_env(envstr,do_alloc) \ | |
4353 | do \ | |
4354 | { \ | |
4355 | if (export_env_index >= (export_env_size - 1)) \ | |
4356 | { \ | |
4357 | export_env_size += 16; \ | |
7117c2d2 | 4358 | export_env = strvec_resize (export_env, export_env_size); \ |
95732b49 | 4359 | environ = export_env; \ |
d166f048 JA |
4360 | } \ |
4361 | export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \ | |
4362 | export_env[export_env_index] = (char *)NULL; \ | |
4363 | } while (0) | |
4364 | ||
d166f048 JA |
4365 | /* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the |
4366 | array with the same left-hand side. Return the new EXPORT_ENV. */ | |
726f6388 | 4367 | char ** |
d166f048 | 4368 | add_or_supercede_exported_var (assign, do_alloc) |
726f6388 | 4369 | char *assign; |
d166f048 | 4370 | int do_alloc; |
726f6388 JA |
4371 | { |
4372 | register int i; | |
d166f048 | 4373 | int equal_offset; |
726f6388 | 4374 | |
b80f6443 | 4375 | equal_offset = assignment (assign, 0); |
d166f048 JA |
4376 | if (equal_offset == 0) |
4377 | return (export_env); | |
726f6388 | 4378 | |
7117c2d2 JA |
4379 | /* If this is a function, then only supersede the function definition. |
4380 | We do this by including the `=() {' in the comparison, like | |
4381 | initialize_shell_variables does. */ | |
4382 | if (assign[equal_offset + 1] == '(' && | |
4383 | strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */ | |
4384 | equal_offset += 4; | |
726f6388 | 4385 | |
d166f048 | 4386 | for (i = 0; i < export_env_index; i++) |
726f6388 | 4387 | { |
d166f048 | 4388 | if (STREQN (assign, export_env[i], equal_offset + 1)) |
726f6388 | 4389 | { |
d166f048 JA |
4390 | free (export_env[i]); |
4391 | export_env[i] = do_alloc ? savestring (assign) : assign; | |
4392 | return (export_env); | |
726f6388 JA |
4393 | } |
4394 | } | |
d166f048 JA |
4395 | add_to_export_env (assign, do_alloc); |
4396 | return (export_env); | |
726f6388 JA |
4397 | } |
4398 | ||
7117c2d2 JA |
4399 | static void |
4400 | add_temp_array_to_env (temp_array, do_alloc, do_supercede) | |
4401 | char **temp_array; | |
4402 | int do_alloc, do_supercede; | |
4403 | { | |
4404 | register int i; | |
4405 | ||
4406 | if (temp_array == 0) | |
4407 | return; | |
4408 | ||
4409 | for (i = 0; temp_array[i]; i++) | |
4410 | { | |
4411 | if (do_supercede) | |
4412 | export_env = add_or_supercede_exported_var (temp_array[i], do_alloc); | |
4413 | else | |
4414 | add_to_export_env (temp_array[i], do_alloc); | |
4415 | } | |
4416 | ||
4417 | free (temp_array); | |
4418 | } | |
4419 | ||
d166f048 | 4420 | /* Make the environment array for the command about to be executed, if the |
726f6388 JA |
4421 | array needs making. Otherwise, do nothing. If a shell action could |
4422 | change the array that commands receive for their environment, then the | |
7117c2d2 JA |
4423 | code should `array_needs_making++'. |
4424 | ||
4425 | The order to add to the array is: | |
4426 | temporary_env | |
4427 | list of var contexts whose head is shell_variables | |
4428 | shell_functions | |
4429 | ||
4430 | This is the shell variable lookup order. We add only new variable | |
4431 | names at each step, which allows local variables and variables in | |
4432 | the temporary environments to shadow variables in the global (or | |
4433 | any previous) scope. | |
4434 | */ | |
4435 | ||
4436 | static int | |
4437 | n_shell_variables () | |
4438 | { | |
4439 | VAR_CONTEXT *vc; | |
4440 | int n; | |
4441 | ||
4442 | for (n = 0, vc = shell_variables; vc; vc = vc->down) | |
4443 | n += HASH_ENTRIES (vc->table); | |
4444 | return n; | |
4445 | } | |
4446 | ||
2bbe8058 CR |
4447 | int |
4448 | chkexport (name) | |
4449 | char *name; | |
4450 | { | |
4451 | SHELL_VAR *v; | |
4452 | ||
4453 | v = find_variable (name); | |
eafc91a3 | 4454 | if (v && exported_p (v)) |
2bbe8058 CR |
4455 | { |
4456 | array_needs_making = 1; | |
4457 | maybe_make_export_env (); | |
4458 | return 1; | |
4459 | } | |
4460 | return 0; | |
4461 | } | |
4462 | ||
726f6388 JA |
4463 | void |
4464 | maybe_make_export_env () | |
4465 | { | |
726f6388 | 4466 | register char **temp_array; |
d166f048 | 4467 | int new_size; |
7117c2d2 | 4468 | VAR_CONTEXT *tcxt; |
726f6388 JA |
4469 | |
4470 | if (array_needs_making) | |
4471 | { | |
4472 | if (export_env) | |
3185942a | 4473 | strvec_flush (export_env); |
d166f048 JA |
4474 | |
4475 | /* Make a guess based on how many shell variables and functions we | |
4476 | have. Since there will always be array variables, and array | |
4477 | variables are not (yet) exported, this will always be big enough | |
7117c2d2 JA |
4478 | for the exported variables and functions. */ |
4479 | new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 + | |
4480 | HASH_ENTRIES (temporary_env); | |
d166f048 JA |
4481 | if (new_size > export_env_size) |
4482 | { | |
4483 | export_env_size = new_size; | |
7117c2d2 | 4484 | export_env = strvec_resize (export_env, export_env_size); |
95732b49 | 4485 | environ = export_env; |
d166f048 JA |
4486 | } |
4487 | export_env[export_env_index = 0] = (char *)NULL; | |
726f6388 | 4488 | |
0001803f | 4489 | /* Make a dummy variable context from the temporary_env, stick it on |
3185942a JA |
4490 | the front of shell_variables, call make_var_export_array on the |
4491 | whole thing to flatten it, and convert the list of SHELL_VAR *s | |
4492 | to the form needed by the environment. */ | |
7117c2d2 | 4493 | if (temporary_env) |
3185942a JA |
4494 | { |
4495 | tcxt = new_var_context ((char *)NULL, 0); | |
4496 | tcxt->table = temporary_env; | |
4497 | tcxt->down = shell_variables; | |
4498 | } | |
7117c2d2 | 4499 | else |
3185942a | 4500 | tcxt = shell_variables; |
7117c2d2 JA |
4501 | |
4502 | temp_array = make_var_export_array (tcxt); | |
d166f048 | 4503 | if (temp_array) |
7117c2d2 JA |
4504 | add_temp_array_to_env (temp_array, 0, 0); |
4505 | ||
4506 | if (tcxt != shell_variables) | |
3185942a | 4507 | free (tcxt); |
726f6388 | 4508 | |
f73dda09 JA |
4509 | #if defined (RESTRICTED_SHELL) |
4510 | /* Restricted shells may not export shell functions. */ | |
7117c2d2 | 4511 | temp_array = restricted ? (char **)0 : make_func_export_array (); |
f73dda09 | 4512 | #else |
7117c2d2 | 4513 | temp_array = make_func_export_array (); |
f73dda09 | 4514 | #endif |
d166f048 | 4515 | if (temp_array) |
7117c2d2 | 4516 | add_temp_array_to_env (temp_array, 0, 0); |
726f6388 JA |
4517 | |
4518 | array_needs_making = 0; | |
4519 | } | |
4520 | } | |
4521 | ||
b72432fd JA |
4522 | /* This is an efficiency hack. PWD and OLDPWD are auto-exported, so |
4523 | we will need to remake the exported environment every time we | |
4524 | change directories. `_' is always put into the environment for | |
4525 | every external command, so without special treatment it will always | |
4526 | cause the environment to be remade. | |
4527 | ||
4528 | If there is no other reason to make the exported environment, we can | |
4529 | just update the variables in place and mark the exported environment | |
4530 | as no longer needing a remake. */ | |
4531 | void | |
4532 | update_export_env_inplace (env_prefix, preflen, value) | |
4533 | char *env_prefix; | |
4534 | int preflen; | |
4535 | char *value; | |
4536 | { | |
4537 | char *evar; | |
4538 | ||
f73dda09 | 4539 | evar = (char *)xmalloc (STRLEN (value) + preflen + 1); |
b72432fd JA |
4540 | strcpy (evar, env_prefix); |
4541 | if (value) | |
4542 | strcpy (evar + preflen, value); | |
4543 | export_env = add_or_supercede_exported_var (evar, 0); | |
4544 | } | |
4545 | ||
726f6388 JA |
4546 | /* We always put _ in the environment as the name of this command. */ |
4547 | void | |
4548 | put_command_name_into_env (command_name) | |
4549 | char *command_name; | |
4550 | { | |
b72432fd | 4551 | update_export_env_inplace ("_=", 2, command_name); |
726f6388 JA |
4552 | } |
4553 | ||
7117c2d2 JA |
4554 | /* **************************************************************** */ |
4555 | /* */ | |
4556 | /* Managing variable contexts */ | |
4557 | /* */ | |
4558 | /* **************************************************************** */ | |
4559 | ||
4560 | /* Allocate and return a new variable context with NAME and FLAGS. | |
4561 | NAME can be NULL. */ | |
726f6388 | 4562 | |
7117c2d2 JA |
4563 | VAR_CONTEXT * |
4564 | new_var_context (name, flags) | |
4565 | char *name; | |
4566 | int flags; | |
4567 | { | |
4568 | VAR_CONTEXT *vc; | |
4569 | ||
4570 | vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT)); | |
4571 | vc->name = name ? savestring (name) : (char *)NULL; | |
4572 | vc->scope = variable_context; | |
4573 | vc->flags = flags; | |
4574 | ||
4575 | vc->up = vc->down = (VAR_CONTEXT *)NULL; | |
4576 | vc->table = (HASH_TABLE *)NULL; | |
4577 | ||
4578 | return vc; | |
4579 | } | |
4580 | ||
4581 | /* Free a variable context and its data, including the hash table. Dispose | |
4582 | all of the variables. */ | |
4583 | void | |
4584 | dispose_var_context (vc) | |
4585 | VAR_CONTEXT *vc; | |
4586 | { | |
4587 | FREE (vc->name); | |
4588 | ||
4589 | if (vc->table) | |
4590 | { | |
4591 | delete_all_variables (vc->table); | |
4592 | hash_dispose (vc->table); | |
4593 | } | |
4594 | ||
4595 | free (vc); | |
4596 | } | |
4597 | ||
4598 | /* Set VAR's scope level to the current variable context. */ | |
4599 | static int | |
4600 | set_context (var) | |
4601 | SHELL_VAR *var; | |
4602 | { | |
4603 | return (var->context = variable_context); | |
4604 | } | |
4605 | ||
4606 | /* Make a new variable context with NAME and FLAGS and a HASH_TABLE of | |
4607 | temporary variables, and push it onto shell_variables. This is | |
4608 | for shell functions. */ | |
4609 | VAR_CONTEXT * | |
4610 | push_var_context (name, flags, tempvars) | |
4611 | char *name; | |
4612 | int flags; | |
4613 | HASH_TABLE *tempvars; | |
4614 | { | |
4615 | VAR_CONTEXT *vc; | |
4616 | ||
4617 | vc = new_var_context (name, flags); | |
4618 | vc->table = tempvars; | |
4619 | if (tempvars) | |
4620 | { | |
4621 | /* Have to do this because the temp environment was created before | |
4622 | variable_context was incremented. */ | |
4623 | flatten (tempvars, set_context, (VARLIST *)NULL, 0); | |
4624 | vc->flags |= VC_HASTMPVAR; | |
4625 | } | |
4626 | vc->down = shell_variables; | |
4627 | shell_variables->up = vc; | |
4628 | ||
4629 | return (shell_variables = vc); | |
4630 | } | |
4631 | ||
4632 | static void | |
4633 | push_func_var (data) | |
4634 | PTR_T data; | |
4635 | { | |
4636 | SHELL_VAR *var, *v; | |
4637 | ||
4638 | var = (SHELL_VAR *)data; | |
4639 | ||
a0c0a00f CR |
4640 | if (local_p (var) && STREQ (var->name, "-")) |
4641 | set_current_options (value_cell (var)); | |
4642 | else if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate))) | |
7117c2d2 | 4643 | { |
30d188c2 CR |
4644 | /* Make sure we have a hash table to store the variable in while it is |
4645 | being propagated down to the global variables table. Create one if | |
4646 | we have to */ | |
4647 | if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0) | |
a0c0a00f | 4648 | shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
7117c2d2 | 4649 | /* XXX - should we set v->context here? */ |
95732b49 | 4650 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
a0c0a00f CR |
4651 | #if defined (ARRAY_VARS) |
4652 | if (array_p (var) || assoc_p (var)) | |
4653 | { | |
4654 | FREE (value_cell (v)); | |
4655 | if (array_p (var)) | |
4656 | var_setarray (v, array_copy (array_cell (var))); | |
4657 | else | |
4658 | var_setassoc (v, assoc_copy (assoc_cell (var))); | |
4659 | } | |
4660 | #endif | |
7117c2d2 JA |
4661 | if (shell_variables == global_variables) |
4662 | var->attributes &= ~(att_tempvar|att_propagate); | |
4663 | else | |
f1be666c | 4664 | shell_variables->flags |= VC_HASTMPVAR; |
a0c0a00f CR |
4665 | if (v) |
4666 | v->attributes |= var->attributes; | |
7117c2d2 | 4667 | } |
f1be666c JA |
4668 | else |
4669 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 JA |
4670 | |
4671 | dispose_variable (var); | |
4672 | } | |
4673 | ||
4674 | /* Pop the top context off of VCXT and dispose of it, returning the rest of | |
4675 | the stack. */ | |
4676 | void | |
4677 | pop_var_context () | |
4678 | { | |
4679 | VAR_CONTEXT *ret, *vcxt; | |
4680 | ||
4681 | vcxt = shell_variables; | |
4682 | if (vc_isfuncenv (vcxt) == 0) | |
4683 | { | |
b80f6443 | 4684 | internal_error (_("pop_var_context: head of shell_variables not a function context")); |
7117c2d2 JA |
4685 | return; |
4686 | } | |
4687 | ||
4688 | if (ret = vcxt->down) | |
4689 | { | |
4690 | ret->up = (VAR_CONTEXT *)NULL; | |
4691 | shell_variables = ret; | |
4692 | if (vcxt->table) | |
4693 | hash_flush (vcxt->table, push_func_var); | |
4694 | dispose_var_context (vcxt); | |
4695 | } | |
4696 | else | |
b80f6443 | 4697 | internal_error (_("pop_var_context: no global_variables context")); |
7117c2d2 JA |
4698 | } |
4699 | ||
4700 | /* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and | |
4701 | all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */ | |
4702 | void | |
4703 | delete_all_contexts (vcxt) | |
4704 | VAR_CONTEXT *vcxt; | |
4705 | { | |
4706 | VAR_CONTEXT *v, *t; | |
4707 | ||
4708 | for (v = vcxt; v != global_variables; v = t) | |
4709 | { | |
4710 | t = v->down; | |
4711 | dispose_var_context (v); | |
3185942a | 4712 | } |
7117c2d2 JA |
4713 | |
4714 | delete_all_variables (global_variables->table); | |
4715 | shell_variables = global_variables; | |
4716 | } | |
4717 | ||
4718 | /* **************************************************************** */ | |
4719 | /* */ | |
4720 | /* Pushing and Popping temporary variable scopes */ | |
4721 | /* */ | |
4722 | /* **************************************************************** */ | |
4723 | ||
4724 | VAR_CONTEXT * | |
4725 | push_scope (flags, tmpvars) | |
4726 | int flags; | |
4727 | HASH_TABLE *tmpvars; | |
4728 | { | |
4729 | return (push_var_context ((char *)NULL, flags, tmpvars)); | |
4730 | } | |
4731 | ||
4732 | static void | |
4733 | push_exported_var (data) | |
4734 | PTR_T data; | |
4735 | { | |
4736 | SHELL_VAR *var, *v; | |
4737 | ||
4738 | var = (SHELL_VAR *)data; | |
4739 | ||
4740 | /* If a temp var had its export attribute set, or it's marked to be | |
4741 | propagated, bind it in the previous scope before disposing it. */ | |
95732b49 JA |
4742 | /* XXX - This isn't exactly right, because all tempenv variables have the |
4743 | export attribute set. */ | |
4744 | #if 0 | |
7117c2d2 | 4745 | if (exported_p (var) || (var->attributes & att_propagate)) |
95732b49 JA |
4746 | #else |
4747 | if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate)) | |
4748 | #endif | |
7117c2d2 JA |
4749 | { |
4750 | var->attributes &= ~att_tempvar; /* XXX */ | |
95732b49 | 4751 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
7117c2d2 JA |
4752 | if (shell_variables == global_variables) |
4753 | var->attributes &= ~att_propagate; | |
a0c0a00f CR |
4754 | if (v) |
4755 | v->attributes |= var->attributes; | |
7117c2d2 | 4756 | } |
f1be666c JA |
4757 | else |
4758 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 JA |
4759 | |
4760 | dispose_variable (var); | |
4761 | } | |
4762 | ||
4763 | void | |
4764 | pop_scope (is_special) | |
4765 | int is_special; | |
4766 | { | |
4767 | VAR_CONTEXT *vcxt, *ret; | |
4768 | ||
4769 | vcxt = shell_variables; | |
4770 | if (vc_istempscope (vcxt) == 0) | |
4771 | { | |
b80f6443 | 4772 | internal_error (_("pop_scope: head of shell_variables not a temporary environment scope")); |
7117c2d2 JA |
4773 | return; |
4774 | } | |
4775 | ||
4776 | ret = vcxt->down; | |
4777 | if (ret) | |
4778 | ret->up = (VAR_CONTEXT *)NULL; | |
4779 | ||
4780 | shell_variables = ret; | |
4781 | ||
4782 | /* Now we can take care of merging variables in VCXT into set of scopes | |
4783 | whose head is RET (shell_variables). */ | |
4784 | FREE (vcxt->name); | |
4785 | if (vcxt->table) | |
4786 | { | |
4787 | if (is_special) | |
4788 | hash_flush (vcxt->table, push_func_var); | |
4789 | else | |
4790 | hash_flush (vcxt->table, push_exported_var); | |
4791 | hash_dispose (vcxt->table); | |
4792 | } | |
4793 | free (vcxt); | |
4794 | ||
4795 | sv_ifs ("IFS"); /* XXX here for now */ | |
4796 | } | |
4797 | ||
4798 | /* **************************************************************** */ | |
4799 | /* */ | |
4800 | /* Pushing and Popping function contexts */ | |
4801 | /* */ | |
4802 | /* **************************************************************** */ | |
4803 | ||
4804 | static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL; | |
4805 | static int dollar_arg_stack_slots; | |
4806 | static int dollar_arg_stack_index; | |
4807 | ||
a0c0a00f | 4808 | /* XXX - should always be followed by remember_args () */ |
7117c2d2 JA |
4809 | void |
4810 | push_context (name, is_subshell, tempvars) | |
4811 | char *name; /* function name */ | |
4812 | int is_subshell; | |
4813 | HASH_TABLE *tempvars; | |
4814 | { | |
4815 | if (is_subshell == 0) | |
4816 | push_dollar_vars (); | |
4817 | variable_context++; | |
4818 | push_var_context (name, VC_FUNCENV, tempvars); | |
4819 | } | |
4820 | ||
4821 | /* Only called when subshell == 0, so we don't need to check, and can | |
4822 | unconditionally pop the dollar vars off the stack. */ | |
4823 | void | |
4824 | pop_context () | |
726f6388 | 4825 | { |
7117c2d2 JA |
4826 | pop_dollar_vars (); |
4827 | variable_context--; | |
4828 | pop_var_context (); | |
726f6388 | 4829 | |
7117c2d2 JA |
4830 | sv_ifs ("IFS"); /* XXX here for now */ |
4831 | } | |
726f6388 | 4832 | |
7117c2d2 JA |
4833 | /* Save the existing positional parameters on a stack. */ |
4834 | void | |
4835 | push_dollar_vars () | |
4836 | { | |
4837 | if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots) | |
4838 | { | |
4839 | dollar_arg_stack = (WORD_LIST **) | |
4840 | xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10) | |
ac50fbac | 4841 | * sizeof (WORD_LIST *)); |
7117c2d2 JA |
4842 | } |
4843 | dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args (); | |
4844 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
4845 | } | |
726f6388 | 4846 | |
7117c2d2 JA |
4847 | /* Restore the positional parameters from our stack. */ |
4848 | void | |
4849 | pop_dollar_vars () | |
4850 | { | |
4851 | if (!dollar_arg_stack || dollar_arg_stack_index == 0) | |
4852 | return; | |
726f6388 | 4853 | |
7117c2d2 JA |
4854 | remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1); |
4855 | dispose_words (dollar_arg_stack[dollar_arg_stack_index]); | |
4856 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
4857 | set_dollar_vars_unchanged (); | |
4858 | } | |
ccc6cda3 | 4859 | |
7117c2d2 JA |
4860 | void |
4861 | dispose_saved_dollar_vars () | |
4862 | { | |
4863 | if (!dollar_arg_stack || dollar_arg_stack_index == 0) | |
4864 | return; | |
726f6388 | 4865 | |
7117c2d2 JA |
4866 | dispose_words (dollar_arg_stack[dollar_arg_stack_index]); |
4867 | dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL; | |
726f6388 | 4868 | } |
cce855bc | 4869 | |
b80f6443 JA |
4870 | /* Manipulate the special BASH_ARGV and BASH_ARGC variables. */ |
4871 | ||
4872 | void | |
4873 | push_args (list) | |
4874 | WORD_LIST *list; | |
4875 | { | |
4876 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
4877 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
4878 | ARRAY *bash_argv_a, *bash_argc_a; | |
4879 | WORD_LIST *l; | |
4880 | arrayind_t i; | |
4881 | char *t; | |
4882 | ||
4883 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
4884 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
4885 | ||
4886 | for (l = list, i = 0; l; l = l->next, i++) | |
4887 | array_push (bash_argv_a, l->word->word); | |
4888 | ||
4889 | t = itos (i); | |
4890 | array_push (bash_argc_a, t); | |
4891 | free (t); | |
4892 | #endif /* ARRAY_VARS && DEBUGGER */ | |
4893 | } | |
4894 | ||
4895 | /* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC | |
4896 | array and use that value as the count of elements to remove from | |
4897 | BASH_ARGV. */ | |
4898 | void | |
4899 | pop_args () | |
4900 | { | |
4901 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
4902 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
4903 | ARRAY *bash_argv_a, *bash_argc_a; | |
4904 | ARRAY_ELEMENT *ce; | |
4905 | intmax_t i; | |
4906 | ||
4907 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
4908 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
4909 | ||
4910 | ce = array_shift (bash_argc_a, 1, 0); | |
4911 | if (ce == 0 || legal_number (element_value (ce), &i) == 0) | |
4912 | i = 0; | |
4913 | ||
4914 | for ( ; i > 0; i--) | |
4915 | array_pop (bash_argv_a); | |
4916 | array_dispose_element (ce); | |
4917 | #endif /* ARRAY_VARS && DEBUGGER */ | |
4918 | } | |
4919 | ||
cce855bc JA |
4920 | /************************************************* |
4921 | * * | |
4922 | * Functions to manage special variables * | |
4923 | * * | |
4924 | *************************************************/ | |
4925 | ||
4926 | /* Extern declarations for variables this code has to manage. */ | |
4927 | extern int eof_encountered, eof_encountered_limit, ignoreeof; | |
4928 | ||
4929 | #if defined (READLINE) | |
cce855bc JA |
4930 | extern int hostname_list_initialized; |
4931 | #endif | |
4932 | ||
4933 | /* An alist of name.function for each special variable. Most of the | |
4934 | functions don't do much, and in fact, this would be faster with a | |
4935 | switch statement, but by the end of this file, I am sick of switch | |
4936 | statements. */ | |
4937 | ||
4938 | #define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0 | |
4939 | ||
7117c2d2 | 4940 | /* This table will be sorted with qsort() the first time it's accessed. */ |
cce855bc JA |
4941 | struct name_and_function { |
4942 | char *name; | |
f73dda09 | 4943 | sh_sv_func_t *function; |
7117c2d2 | 4944 | }; |
cce855bc | 4945 | |
7117c2d2 | 4946 | static struct name_and_function special_vars[] = { |
ac50fbac | 4947 | { "BASH_COMPAT", sv_shcompat }, |
0001803f CR |
4948 | { "BASH_XTRACEFD", sv_xtracefd }, |
4949 | ||
ac50fbac CR |
4950 | #if defined (JOB_CONTROL) |
4951 | { "CHILD_MAX", sv_childmax }, | |
4952 | #endif | |
4953 | ||
95732b49 JA |
4954 | #if defined (READLINE) |
4955 | # if defined (STRICT_POSIX) | |
4956 | { "COLUMNS", sv_winsize }, | |
4957 | # endif | |
4958 | { "COMP_WORDBREAKS", sv_comp_wordbreaks }, | |
4959 | #endif | |
4960 | ||
a0c0a00f CR |
4961 | { "EXECIGNORE", sv_execignore }, |
4962 | ||
495aee44 CR |
4963 | { "FUNCNEST", sv_funcnest }, |
4964 | ||
cce855bc JA |
4965 | { "GLOBIGNORE", sv_globignore }, |
4966 | ||
cce855bc | 4967 | #if defined (HISTORY) |
7117c2d2 JA |
4968 | { "HISTCONTROL", sv_history_control }, |
4969 | { "HISTFILESIZE", sv_histsize }, | |
cce855bc JA |
4970 | { "HISTIGNORE", sv_histignore }, |
4971 | { "HISTSIZE", sv_histsize }, | |
b80f6443 | 4972 | { "HISTTIMEFORMAT", sv_histtimefmt }, |
7117c2d2 | 4973 | #endif |
cce855bc | 4974 | |
95732b49 JA |
4975 | #if defined (__CYGWIN__) |
4976 | { "HOME", sv_home }, | |
4977 | #endif | |
4978 | ||
7117c2d2 JA |
4979 | #if defined (READLINE) |
4980 | { "HOSTFILE", sv_hostfile }, | |
4981 | #endif | |
cce855bc | 4982 | |
7117c2d2 JA |
4983 | { "IFS", sv_ifs }, |
4984 | { "IGNOREEOF", sv_ignoreeof }, | |
cce855bc | 4985 | |
7117c2d2 | 4986 | { "LANG", sv_locale }, |
cce855bc JA |
4987 | { "LC_ALL", sv_locale }, |
4988 | { "LC_COLLATE", sv_locale }, | |
4989 | { "LC_CTYPE", sv_locale }, | |
4990 | { "LC_MESSAGES", sv_locale }, | |
bb70624e | 4991 | { "LC_NUMERIC", sv_locale }, |
95732b49 JA |
4992 | { "LC_TIME", sv_locale }, |
4993 | ||
4994 | #if defined (READLINE) && defined (STRICT_POSIX) | |
4995 | { "LINES", sv_winsize }, | |
4996 | #endif | |
7117c2d2 JA |
4997 | |
4998 | { "MAIL", sv_mail }, | |
4999 | { "MAILCHECK", sv_mail }, | |
5000 | { "MAILPATH", sv_mail }, | |
5001 | ||
5002 | { "OPTERR", sv_opterr }, | |
5003 | { "OPTIND", sv_optind }, | |
5004 | ||
5005 | { "PATH", sv_path }, | |
5006 | { "POSIXLY_CORRECT", sv_strict_posix }, | |
5007 | ||
5008 | #if defined (READLINE) | |
5009 | { "TERM", sv_terminal }, | |
5010 | { "TERMCAP", sv_terminal }, | |
5011 | { "TERMINFO", sv_terminal }, | |
5012 | #endif /* READLINE */ | |
5013 | ||
5014 | { "TEXTDOMAIN", sv_locale }, | |
5015 | { "TEXTDOMAINDIR", sv_locale }, | |
cce855bc | 5016 | |
2bbe8058 | 5017 | #if defined (HAVE_TZSET) |
cce855bc JA |
5018 | { "TZ", sv_tz }, |
5019 | #endif | |
5020 | ||
7117c2d2 JA |
5021 | #if defined (HISTORY) && defined (BANG_HISTORY) |
5022 | { "histchars", sv_histchars }, | |
5023 | #endif /* HISTORY && BANG_HISTORY */ | |
5024 | ||
5025 | { "ignoreeof", sv_ignoreeof }, | |
5026 | ||
f73dda09 | 5027 | { (char *)0, (sh_sv_func_t *)0 } |
cce855bc JA |
5028 | }; |
5029 | ||
7117c2d2 JA |
5030 | #define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1) |
5031 | ||
5032 | static int | |
5033 | sv_compare (sv1, sv2) | |
5034 | struct name_and_function *sv1, *sv2; | |
5035 | { | |
5036 | int r; | |
5037 | ||
5038 | if ((r = sv1->name[0] - sv2->name[0]) == 0) | |
5039 | r = strcmp (sv1->name, sv2->name); | |
5040 | return r; | |
5041 | } | |
5042 | ||
5043 | static inline int | |
5044 | find_special_var (name) | |
5045 | const char *name; | |
5046 | { | |
5047 | register int i, r; | |
5048 | ||
5049 | for (i = 0; special_vars[i].name; i++) | |
5050 | { | |
5051 | r = special_vars[i].name[0] - name[0]; | |
5052 | if (r == 0) | |
5053 | r = strcmp (special_vars[i].name, name); | |
5054 | if (r == 0) | |
5055 | return i; | |
5056 | else if (r > 0) | |
5057 | /* Can't match any of rest of elements in sorted list. Take this out | |
5058 | if it causes problems in certain environments. */ | |
3185942a | 5059 | break; |
7117c2d2 JA |
5060 | } |
5061 | return -1; | |
5062 | } | |
5063 | ||
cce855bc JA |
5064 | /* The variable in NAME has just had its state changed. Check to see if it |
5065 | is one of the special ones where something special happens. */ | |
5066 | void | |
5067 | stupidly_hack_special_variables (name) | |
5068 | char *name; | |
5069 | { | |
7117c2d2 | 5070 | static int sv_sorted = 0; |
cce855bc JA |
5071 | int i; |
5072 | ||
7117c2d2 | 5073 | if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */ |
cce855bc | 5074 | { |
7117c2d2 JA |
5075 | qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]), |
5076 | (QSFUNC *)sv_compare); | |
5077 | sv_sorted = 1; | |
cce855bc | 5078 | } |
7117c2d2 JA |
5079 | |
5080 | i = find_special_var (name); | |
5081 | if (i != -1) | |
5082 | (*(special_vars[i].function)) (name); | |
5083 | } | |
5084 | ||
3185942a JA |
5085 | /* Special variables that need hooks to be run when they are unset as part |
5086 | of shell reinitialization should have their sv_ functions run here. */ | |
5087 | void | |
5088 | reinit_special_variables () | |
5089 | { | |
5090 | #if defined (READLINE) | |
5091 | sv_comp_wordbreaks ("COMP_WORDBREAKS"); | |
5092 | #endif | |
5093 | sv_globignore ("GLOBIGNORE"); | |
5094 | sv_opterr ("OPTERR"); | |
5095 | } | |
5096 | ||
7117c2d2 JA |
5097 | void |
5098 | sv_ifs (name) | |
5099 | char *name; | |
5100 | { | |
5101 | SHELL_VAR *v; | |
5102 | ||
5103 | v = find_variable ("IFS"); | |
5104 | setifs (v); | |
cce855bc JA |
5105 | } |
5106 | ||
5107 | /* What to do just after the PATH variable has changed. */ | |
5108 | void | |
5109 | sv_path (name) | |
5110 | char *name; | |
5111 | { | |
5112 | /* hash -r */ | |
7117c2d2 | 5113 | phash_flush (); |
cce855bc JA |
5114 | } |
5115 | ||
5116 | /* What to do just after one of the MAILxxxx variables has changed. NAME | |
5117 | is the name of the variable. This is called with NAME set to one of | |
5118 | MAIL, MAILCHECK, or MAILPATH. */ | |
5119 | void | |
5120 | sv_mail (name) | |
5121 | char *name; | |
5122 | { | |
5123 | /* If the time interval for checking the files has changed, then | |
5124 | reset the mail timer. Otherwise, one of the pathname vars | |
5125 | to the users mailbox has changed, so rebuild the array of | |
5126 | filenames. */ | |
5127 | if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */ | |
5128 | reset_mail_timer (); | |
5129 | else | |
5130 | { | |
5131 | free_mail_files (); | |
5132 | remember_mail_dates (); | |
5133 | } | |
5134 | } | |
5135 | ||
495aee44 CR |
5136 | void |
5137 | sv_funcnest (name) | |
5138 | char *name; | |
5139 | { | |
5140 | SHELL_VAR *v; | |
5141 | intmax_t num; | |
5142 | ||
5143 | v = find_variable (name); | |
5144 | if (v == 0) | |
5145 | funcnest_max = 0; | |
5146 | else if (legal_number (value_cell (v), &num) == 0) | |
5147 | funcnest_max = 0; | |
5148 | else | |
5149 | funcnest_max = num; | |
5150 | } | |
5151 | ||
a0c0a00f CR |
5152 | /* What to do when EXECIGNORE changes. */ |
5153 | void | |
5154 | sv_execignore (name) | |
5155 | char *name; | |
5156 | { | |
5157 | setup_exec_ignore (name); | |
5158 | } | |
5159 | ||
cce855bc JA |
5160 | /* What to do when GLOBIGNORE changes. */ |
5161 | void | |
5162 | sv_globignore (name) | |
5163 | char *name; | |
5164 | { | |
3185942a JA |
5165 | if (privileged_mode == 0) |
5166 | setup_glob_ignore (name); | |
cce855bc JA |
5167 | } |
5168 | ||
5169 | #if defined (READLINE) | |
95732b49 JA |
5170 | void |
5171 | sv_comp_wordbreaks (name) | |
5172 | char *name; | |
5173 | { | |
5174 | SHELL_VAR *sv; | |
5175 | ||
5176 | sv = find_variable (name); | |
5177 | if (sv == 0) | |
3185942a | 5178 | reset_completer_word_break_chars (); |
95732b49 JA |
5179 | } |
5180 | ||
cce855bc JA |
5181 | /* What to do just after one of the TERMxxx variables has changed. |
5182 | If we are an interactive shell, then try to reset the terminal | |
5183 | information in readline. */ | |
5184 | void | |
5185 | sv_terminal (name) | |
5186 | char *name; | |
5187 | { | |
5188 | if (interactive_shell && no_line_editing == 0) | |
5189 | rl_reset_terminal (get_string_value ("TERM")); | |
5190 | } | |
5191 | ||
5192 | void | |
5193 | sv_hostfile (name) | |
5194 | char *name; | |
5195 | { | |
bb70624e JA |
5196 | SHELL_VAR *v; |
5197 | ||
5198 | v = find_variable (name); | |
5199 | if (v == 0) | |
5200 | clear_hostname_list (); | |
5201 | else | |
5202 | hostname_list_initialized = 0; | |
cce855bc | 5203 | } |
95732b49 JA |
5204 | |
5205 | #if defined (STRICT_POSIX) | |
5206 | /* In strict posix mode, we allow assignments to LINES and COLUMNS (and values | |
5207 | found in the initial environment) to override the terminal size reported by | |
5208 | the kernel. */ | |
5209 | void | |
5210 | sv_winsize (name) | |
5211 | char *name; | |
5212 | { | |
5213 | SHELL_VAR *v; | |
5214 | intmax_t xd; | |
5215 | int d; | |
5216 | ||
5217 | if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing) | |
5218 | return; | |
5219 | ||
5220 | v = find_variable (name); | |
a0c0a00f | 5221 | if (v == 0 || var_isset (v) == 0) |
95732b49 JA |
5222 | rl_reset_screen_size (); |
5223 | else | |
5224 | { | |
5225 | if (legal_number (value_cell (v), &xd) == 0) | |
5226 | return; | |
495aee44 | 5227 | winsize_assignment = 1; |
95732b49 JA |
5228 | d = xd; /* truncate */ |
5229 | if (name[0] == 'L') /* LINES */ | |
5230 | rl_set_screen_size (d, -1); | |
5231 | else /* COLUMNS */ | |
5232 | rl_set_screen_size (-1, d); | |
5233 | winsize_assignment = 0; | |
5234 | } | |
5235 | } | |
5236 | #endif /* STRICT_POSIX */ | |
cce855bc JA |
5237 | #endif /* READLINE */ |
5238 | ||
95732b49 JA |
5239 | /* Update the value of HOME in the export environment so tilde expansion will |
5240 | work on cygwin. */ | |
5241 | #if defined (__CYGWIN__) | |
5242 | sv_home (name) | |
5243 | char *name; | |
5244 | { | |
5245 | array_needs_making = 1; | |
5246 | maybe_make_export_env (); | |
5247 | } | |
5248 | #endif | |
5249 | ||
cce855bc JA |
5250 | #if defined (HISTORY) |
5251 | /* What to do after the HISTSIZE or HISTFILESIZE variables change. | |
5252 | If there is a value for this HISTSIZE (and it is numeric), then stifle | |
5253 | the history. Otherwise, if there is NO value for this variable, | |
5254 | unstifle the history. If name is HISTFILESIZE, and its value is | |
5255 | numeric, truncate the history file to hold no more than that many | |
5256 | lines. */ | |
5257 | void | |
5258 | sv_histsize (name) | |
5259 | char *name; | |
5260 | { | |
5261 | char *temp; | |
7117c2d2 | 5262 | intmax_t num; |
95732b49 | 5263 | int hmax; |
cce855bc JA |
5264 | |
5265 | temp = get_string_value (name); | |
5266 | ||
5267 | if (temp && *temp) | |
5268 | { | |
5269 | if (legal_number (temp, &num)) | |
28ef6c31 | 5270 | { |
0628567a | 5271 | hmax = num; |
ac50fbac CR |
5272 | if (hmax < 0 && name[4] == 'S') |
5273 | unstifle_history (); /* unstifle history if HISTSIZE < 0 */ | |
5274 | else if (name[4] == 'S') | |
cce855bc | 5275 | { |
95732b49 | 5276 | stifle_history (hmax); |
0628567a JA |
5277 | hmax = where_history (); |
5278 | if (history_lines_this_session > hmax) | |
5279 | history_lines_this_session = hmax; | |
cce855bc | 5280 | } |
ac50fbac | 5281 | else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */ |
cce855bc | 5282 | { |
0628567a | 5283 | history_truncate_file (get_string_value ("HISTFILE"), hmax); |
a0c0a00f CR |
5284 | /* If we just shrank the history file to fewer lines than we've |
5285 | already read, make sure we adjust our idea of how many lines | |
5286 | we have read from the file. */ | |
5287 | if (hmax < history_lines_in_file) | |
0628567a | 5288 | history_lines_in_file = hmax; |
cce855bc JA |
5289 | } |
5290 | } | |
5291 | } | |
5292 | else if (name[4] == 'S') | |
5293 | unstifle_history (); | |
5294 | } | |
5295 | ||
5296 | /* What to do after the HISTIGNORE variable changes. */ | |
5297 | void | |
5298 | sv_histignore (name) | |
5299 | char *name; | |
5300 | { | |
5301 | setup_history_ignore (name); | |
5302 | } | |
5303 | ||
5304 | /* What to do after the HISTCONTROL variable changes. */ | |
5305 | void | |
5306 | sv_history_control (name) | |
5307 | char *name; | |
5308 | { | |
5309 | char *temp; | |
b80f6443 JA |
5310 | char *val; |
5311 | int tptr; | |
cce855bc JA |
5312 | |
5313 | history_control = 0; | |
5314 | temp = get_string_value (name); | |
5315 | ||
b80f6443 JA |
5316 | if (temp == 0 || *temp == 0) |
5317 | return; | |
5318 | ||
5319 | tptr = 0; | |
5320 | while (val = extract_colon_unit (temp, &tptr)) | |
cce855bc | 5321 | { |
b80f6443 JA |
5322 | if (STREQ (val, "ignorespace")) |
5323 | history_control |= HC_IGNSPACE; | |
5324 | else if (STREQ (val, "ignoredups")) | |
5325 | history_control |= HC_IGNDUPS; | |
5326 | else if (STREQ (val, "ignoreboth")) | |
5327 | history_control |= HC_IGNBOTH; | |
5328 | else if (STREQ (val, "erasedups")) | |
5329 | history_control |= HC_ERASEDUPS; | |
5330 | ||
5331 | free (val); | |
cce855bc JA |
5332 | } |
5333 | } | |
5334 | ||
5335 | #if defined (BANG_HISTORY) | |
5336 | /* Setting/unsetting of the history expansion character. */ | |
5337 | void | |
5338 | sv_histchars (name) | |
5339 | char *name; | |
5340 | { | |
5341 | char *temp; | |
5342 | ||
5343 | temp = get_string_value (name); | |
5344 | if (temp) | |
5345 | { | |
5346 | history_expansion_char = *temp; | |
5347 | if (temp[0] && temp[1]) | |
5348 | { | |
5349 | history_subst_char = temp[1]; | |
5350 | if (temp[2]) | |
5351 | history_comment_char = temp[2]; | |
5352 | } | |
5353 | } | |
5354 | else | |
5355 | { | |
5356 | history_expansion_char = '!'; | |
5357 | history_subst_char = '^'; | |
5358 | history_comment_char = '#'; | |
5359 | } | |
5360 | } | |
5361 | #endif /* BANG_HISTORY */ | |
b80f6443 JA |
5362 | |
5363 | void | |
5364 | sv_histtimefmt (name) | |
5365 | char *name; | |
5366 | { | |
5367 | SHELL_VAR *v; | |
5368 | ||
ac50fbac CR |
5369 | if (v = find_variable (name)) |
5370 | { | |
5371 | if (history_comment_char == 0) | |
5372 | history_comment_char = '#'; | |
5373 | } | |
b80f6443 JA |
5374 | history_write_timestamps = (v != 0); |
5375 | } | |
cce855bc JA |
5376 | #endif /* HISTORY */ |
5377 | ||
2bbe8058 | 5378 | #if defined (HAVE_TZSET) |
cce855bc JA |
5379 | void |
5380 | sv_tz (name) | |
5381 | char *name; | |
5382 | { | |
2bbe8058 CR |
5383 | if (chkexport (name)) |
5384 | tzset (); | |
cce855bc JA |
5385 | } |
5386 | #endif | |
5387 | ||
5388 | /* If the variable exists, then the value of it can be the number | |
5389 | of times we actually ignore the EOF. The default is small, | |
5390 | (smaller than csh, anyway). */ | |
5391 | void | |
5392 | sv_ignoreeof (name) | |
5393 | char *name; | |
5394 | { | |
5395 | SHELL_VAR *tmp_var; | |
5396 | char *temp; | |
5397 | ||
5398 | eof_encountered = 0; | |
5399 | ||
5400 | tmp_var = find_variable (name); | |
a0c0a00f | 5401 | ignoreeof = tmp_var && var_isset (tmp_var); |
cce855bc JA |
5402 | temp = tmp_var ? value_cell (tmp_var) : (char *)NULL; |
5403 | if (temp) | |
5404 | eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10; | |
5405 | set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */ | |
5406 | } | |
5407 | ||
5408 | void | |
5409 | sv_optind (name) | |
5410 | char *name; | |
5411 | { | |
a0c0a00f | 5412 | SHELL_VAR *var; |
cce855bc JA |
5413 | char *tt; |
5414 | int s; | |
5415 | ||
a0c0a00f CR |
5416 | var = find_variable ("OPTIND"); |
5417 | tt = var ? get_variable_value (var) : (char *)NULL; | |
5418 | ||
5419 | /* Assume that if var->context < variable_context and variable_context > 0 | |
5420 | then we are restoring the variables's previous state while returning | |
5421 | from a function. */ | |
cce855bc JA |
5422 | if (tt && *tt) |
5423 | { | |
5424 | s = atoi (tt); | |
5425 | ||
5426 | /* According to POSIX, setting OPTIND=1 resets the internal state | |
5427 | of getopt (). */ | |
5428 | if (s < 0 || s == 1) | |
5429 | s = 0; | |
5430 | } | |
5431 | else | |
5432 | s = 0; | |
5433 | getopts_reset (s); | |
5434 | } | |
5435 | ||
5436 | void | |
5437 | sv_opterr (name) | |
5438 | char *name; | |
5439 | { | |
5440 | char *tt; | |
5441 | ||
5442 | tt = get_string_value ("OPTERR"); | |
5443 | sh_opterr = (tt && *tt) ? atoi (tt) : 1; | |
5444 | } | |
5445 | ||
5446 | void | |
5447 | sv_strict_posix (name) | |
5448 | char *name; | |
5449 | { | |
a0c0a00f CR |
5450 | SHELL_VAR *var; |
5451 | ||
5452 | var = find_variable (name); | |
5453 | posixly_correct = var && var_isset (var); | |
cce855bc JA |
5454 | posix_initialize (posixly_correct); |
5455 | #if defined (READLINE) | |
5456 | if (interactive_shell) | |
5457 | posix_readline_initialize (posixly_correct); | |
5458 | #endif /* READLINE */ | |
5459 | set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */ | |
5460 | } | |
5461 | ||
5462 | void | |
5463 | sv_locale (name) | |
5464 | char *name; | |
5465 | { | |
5466 | char *v; | |
ac50fbac | 5467 | int r; |
cce855bc JA |
5468 | |
5469 | v = get_string_value (name); | |
5470 | if (name[0] == 'L' && name[1] == 'A') /* LANG */ | |
ac50fbac | 5471 | r = set_lang (name, v); |
cce855bc | 5472 | else |
ac50fbac CR |
5473 | r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */ |
5474 | ||
5475 | #if 1 | |
5476 | if (r == 0 && posixly_correct) | |
5477 | last_command_exit_value = 1; | |
5478 | #endif | |
cce855bc JA |
5479 | } |
5480 | ||
5481 | #if defined (ARRAY_VARS) | |
5482 | void | |
7117c2d2 | 5483 | set_pipestatus_array (ps, nproc) |
cce855bc | 5484 | int *ps; |
7117c2d2 | 5485 | int nproc; |
cce855bc JA |
5486 | { |
5487 | SHELL_VAR *v; | |
5488 | ARRAY *a; | |
7117c2d2 | 5489 | ARRAY_ELEMENT *ae; |
cce855bc | 5490 | register int i; |
f73dda09 | 5491 | char *t, tbuf[INT_STRLEN_BOUND(int) + 1]; |
cce855bc JA |
5492 | |
5493 | v = find_variable ("PIPESTATUS"); | |
5494 | if (v == 0) | |
5495 | v = make_new_array_variable ("PIPESTATUS"); | |
5496 | if (array_p (v) == 0) | |
5497 | return; /* Do nothing if not an array variable. */ | |
5498 | a = array_cell (v); | |
7117c2d2 JA |
5499 | |
5500 | if (a == 0 || array_num_elements (a) == 0) | |
cce855bc | 5501 | { |
7117c2d2 JA |
5502 | for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */ |
5503 | { | |
5504 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
5505 | array_insert (a, i, t); | |
5506 | } | |
5507 | return; | |
5508 | } | |
5509 | ||
5510 | /* Fast case */ | |
5511 | if (array_num_elements (a) == nproc && nproc == 1) | |
5512 | { | |
5513 | ae = element_forw (a->head); | |
5514 | free (element_value (ae)); | |
5515 | ae->value = itos (ps[0]); | |
5516 | } | |
5517 | else if (array_num_elements (a) <= nproc) | |
5518 | { | |
5519 | /* modify in array_num_elements members in place, then add */ | |
5520 | ae = a->head; | |
5521 | for (i = 0; i < array_num_elements (a); i++) | |
5522 | { | |
5523 | ae = element_forw (ae); | |
5524 | free (element_value (ae)); | |
5525 | ae->value = itos (ps[i]); | |
5526 | } | |
5527 | /* add any more */ | |
5528 | for ( ; i < nproc; i++) | |
5529 | { | |
5530 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
5531 | array_insert (a, i, t); | |
5532 | } | |
5533 | } | |
5534 | else | |
5535 | { | |
5536 | /* deleting elements. it's faster to rebuild the array. */ | |
5537 | array_flush (a); | |
5538 | for (i = 0; ps[i] != -1; i++) | |
5539 | { | |
5540 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
5541 | array_insert (a, i, t); | |
5542 | } | |
cce855bc JA |
5543 | } |
5544 | } | |
495aee44 CR |
5545 | |
5546 | ARRAY * | |
5547 | save_pipestatus_array () | |
5548 | { | |
5549 | SHELL_VAR *v; | |
5550 | ARRAY *a, *a2; | |
5551 | ||
5552 | v = find_variable ("PIPESTATUS"); | |
5553 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
5554 | return ((ARRAY *)NULL); | |
5555 | ||
5556 | a = array_cell (v); | |
5557 | a2 = array_copy (array_cell (v)); | |
5558 | ||
5559 | return a2; | |
5560 | } | |
5561 | ||
5562 | void | |
5563 | restore_pipestatus_array (a) | |
5564 | ARRAY *a; | |
5565 | { | |
5566 | SHELL_VAR *v; | |
5567 | ARRAY *a2; | |
5568 | ||
5569 | v = find_variable ("PIPESTATUS"); | |
5570 | /* XXX - should we still assign even if existing value is NULL? */ | |
5571 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
5572 | return; | |
5573 | ||
5574 | a2 = array_cell (v); | |
5575 | var_setarray (v, a); | |
5576 | ||
5577 | array_dispose (a2); | |
5578 | } | |
cce855bc JA |
5579 | #endif |
5580 | ||
5581 | void | |
5582 | set_pipestatus_from_exit (s) | |
5583 | int s; | |
5584 | { | |
5585 | #if defined (ARRAY_VARS) | |
5586 | static int v[2] = { 0, -1 }; | |
5587 | ||
5588 | v[0] = s; | |
7117c2d2 | 5589 | set_pipestatus_array (v, 1); |
cce855bc JA |
5590 | #endif |
5591 | } | |
0001803f CR |
5592 | |
5593 | void | |
5594 | sv_xtracefd (name) | |
5595 | char *name; | |
5596 | { | |
5597 | SHELL_VAR *v; | |
5598 | char *t, *e; | |
5599 | int fd; | |
5600 | FILE *fp; | |
5601 | ||
5602 | v = find_variable (name); | |
5603 | if (v == 0) | |
5604 | { | |
5605 | xtrace_reset (); | |
5606 | return; | |
5607 | } | |
5608 | ||
5609 | t = value_cell (v); | |
5610 | if (t == 0 || *t == 0) | |
5611 | xtrace_reset (); | |
5612 | else | |
5613 | { | |
5614 | fd = (int)strtol (t, &e, 10); | |
5615 | if (e != t && *e == '\0' && sh_validfd (fd)) | |
5616 | { | |
5617 | fp = fdopen (fd, "w"); | |
5618 | if (fp == 0) | |
5619 | internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v)); | |
5620 | else | |
5621 | xtrace_set (fd, fp); | |
5622 | } | |
5623 | else | |
5624 | internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v)); | |
5625 | } | |
5626 | } | |
ac50fbac CR |
5627 | |
5628 | #define MIN_COMPAT_LEVEL 31 | |
5629 | ||
5630 | void | |
5631 | sv_shcompat (name) | |
5632 | char *name; | |
5633 | { | |
5634 | SHELL_VAR *v; | |
5635 | char *val; | |
5636 | int tens, ones, compatval; | |
5637 | ||
5638 | v = find_variable (name); | |
5639 | if (v == 0) | |
5640 | { | |
5641 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
5642 | set_compatibility_opts (); | |
5643 | return; | |
5644 | } | |
5645 | val = value_cell (v); | |
5646 | if (val == 0 || *val == '\0') | |
5647 | { | |
5648 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
5649 | set_compatibility_opts (); | |
5650 | return; | |
5651 | } | |
5652 | /* Handle decimal-like compatibility version specifications: 4.2 */ | |
a0c0a00f | 5653 | if (ISDIGIT (val[0]) && val[1] == '.' && ISDIGIT (val[2]) && val[3] == 0) |
ac50fbac CR |
5654 | { |
5655 | tens = val[0] - '0'; | |
5656 | ones = val[2] - '0'; | |
5657 | compatval = tens*10 + ones; | |
5658 | } | |
5659 | /* Handle integer-like compatibility version specifications: 42 */ | |
a0c0a00f | 5660 | else if (ISDIGIT (val[0]) && ISDIGIT (val[1]) && val[2] == 0) |
ac50fbac CR |
5661 | { |
5662 | tens = val[0] - '0'; | |
5663 | ones = val[1] - '0'; | |
5664 | compatval = tens*10 + ones; | |
5665 | } | |
5666 | else | |
5667 | { | |
5668 | compat_error: | |
5669 | internal_error (_("%s: %s: compatibility value out of range"), name, val); | |
5670 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
5671 | set_compatibility_opts (); | |
5672 | return; | |
5673 | } | |
5674 | ||
5675 | if (compatval < MIN_COMPAT_LEVEL || compatval > DEFAULT_COMPAT_LEVEL) | |
5676 | goto compat_error; | |
5677 | ||
5678 | shell_compatibility_level = compatval; | |
5679 | set_compatibility_opts (); | |
5680 | } | |
5681 | ||
5682 | #if defined (JOB_CONTROL) | |
5683 | void | |
5684 | sv_childmax (name) | |
5685 | char *name; | |
5686 | { | |
5687 | char *tt; | |
5688 | int s; | |
5689 | ||
5690 | tt = get_string_value (name); | |
5691 | s = (tt && *tt) ? atoi (tt) : 0; | |
5692 | set_maxchild (s); | |
5693 | } | |
5694 | #endif |