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Commit | Line | Data |
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726f6388 JA |
1 | /* variables.c -- Functions for hacking shell variables. */ |
2 | ||
b2613ad1 | 3 | /* Copyright (C) 1987-2023 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
2e4498b3 CR |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
726f6388 | 11 | |
2e4498b3 CR |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
726f6388 JA |
16 | |
17 | You should have received a copy of the GNU General Public License | |
2e4498b3 CR |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
19 | */ | |
726f6388 | 20 | |
ccc6cda3 JA |
21 | #include "config.h" |
22 | ||
726f6388 JA |
23 | #include "bashtypes.h" |
24 | #include "posixstat.h" | |
f73dda09 | 25 | #include "posixtime.h" |
ccc6cda3 | 26 | |
70694d2e CR |
27 | #if defined (__QNX__) |
28 | # if defined (__QNXNTO__) | |
d3ad40de | 29 | # include <sys/netmgr.h> |
fd3925f1 CR |
30 | # else |
31 | # include <sys/vc.h> | |
70694d2e CR |
32 | # endif /* !__QNXNTO__ */ |
33 | #endif /* __QNX__ */ | |
d166f048 | 34 | |
ccc6cda3 JA |
35 | #if defined (HAVE_UNISTD_H) |
36 | # include <unistd.h> | |
37 | #endif | |
38 | ||
39 | #include <stdio.h> | |
f73dda09 | 40 | #include "chartypes.h" |
e77a3058 CR |
41 | #if defined (HAVE_PWD_H) |
42 | # include <pwd.h> | |
43 | #endif | |
726f6388 | 44 | #include "bashansi.h" |
5e13499c | 45 | #include "bashintl.h" |
376c9fe5 | 46 | #include "filecntl.h" |
ccc6cda3 | 47 | |
691aebcb CR |
48 | #define NEED_XTRACE_SET_DECL |
49 | ||
726f6388 | 50 | #include "shell.h" |
ec157dfe | 51 | #include "parser.h" |
726f6388 JA |
52 | #include "flags.h" |
53 | #include "execute_cmd.h" | |
cce855bc | 54 | #include "findcmd.h" |
ccc6cda3 JA |
55 | #include "mailcheck.h" |
56 | #include "input.h" | |
f73dda09 JA |
57 | #include "hashcmd.h" |
58 | #include "pathexp.h" | |
fdf670ea | 59 | #include "alias.h" |
dfc91666 | 60 | #include "jobs.h" |
726f6388 | 61 | |
7175a77f CR |
62 | #include "version.h" |
63 | ||
d166f048 | 64 | #include "builtins/getopt.h" |
726f6388 | 65 | #include "builtins/common.h" |
1a81420a | 66 | #include "builtins/builtext.h" |
cce855bc JA |
67 | |
68 | #if defined (READLINE) | |
69 | # include "bashline.h" | |
70 | # include <readline/readline.h> | |
71 | #else | |
72 | # include <tilde/tilde.h> | |
73 | #endif | |
726f6388 | 74 | |
ccc6cda3 JA |
75 | #if defined (HISTORY) |
76 | # include "bashhist.h" | |
cce855bc | 77 | # include <readline/history.h> |
ccc6cda3 JA |
78 | #endif /* HISTORY */ |
79 | ||
bb70624e JA |
80 | #if defined (PROGRAMMABLE_COMPLETION) |
81 | # include "pcomplete.h" | |
82 | #endif | |
83 | ||
85ec0778 | 84 | #define VARIABLES_HASH_BUCKETS 1024 /* must be power of two */ |
48abf0fd | 85 | #define FUNCTIONS_HASH_BUCKETS 512 |
7117c2d2 JA |
86 | #define TEMPENV_HASH_BUCKETS 4 /* must be power of two */ |
87 | ||
30595b57 CR |
88 | #define BASHFUNC_PREFIX "BASH_FUNC_" |
89 | #define BASHFUNC_PREFLEN 10 /* == strlen(BASHFUNC_PREFIX */ | |
90 | #define BASHFUNC_SUFFIX "%%" | |
91 | #define BASHFUNC_SUFFLEN 2 /* == strlen(BASHFUNC_SUFFIX) */ | |
92 | ||
d70b5339 CR |
93 | #if ARRAY_EXPORT |
94 | #define BASHARRAY_PREFIX "BASH_ARRAY_" | |
95 | #define BASHARRAY_PREFLEN 11 | |
96 | #define BASHARRAY_SUFFIX "%%" | |
97 | #define BASHARRAY_SUFFLEN 2 | |
98 | ||
99 | #define BASHASSOC_PREFIX "BASH_ASSOC_" | |
100 | #define BASHASSOC_PREFLEN 11 | |
101 | #define BASHASSOC_SUFFIX "%%" /* needs to be the same as BASHARRAY_SUFFIX */ | |
102 | #define BASHASSOC_SUFFLEN 2 | |
103 | #endif | |
104 | ||
fe570ea1 CR |
105 | /* flags for find_variable_internal */ |
106 | ||
107 | #define FV_FORCETEMPENV 0x01 | |
108 | #define FV_SKIPINVISIBLE 0x02 | |
e34adc2c | 109 | #define FV_NODYNAMIC 0x04 |
fe570ea1 | 110 | |
0f445e6c CR |
111 | extern char **environ; |
112 | ||
726f6388 | 113 | /* Variables used here and defined in other files. */ |
726f6388 | 114 | extern time_t shell_start_time; |
32ba27b4 | 115 | extern struct timeval shellstart; |
d3a24ed2 | 116 | |
7117c2d2 JA |
117 | /* The list of shell variables that the user has created at the global |
118 | scope, or that came from the environment. */ | |
119 | VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL; | |
120 | ||
121 | /* The current list of shell variables, including function scopes */ | |
122 | VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL; | |
726f6388 JA |
123 | |
124 | /* The list of shell functions that the user has created, or that came from | |
125 | the environment. */ | |
126 | HASH_TABLE *shell_functions = (HASH_TABLE *)NULL; | |
127 | ||
8d125d8b CR |
128 | HASH_TABLE *invalid_env = (HASH_TABLE *)NULL; |
129 | ||
d3a24ed2 CR |
130 | #if defined (DEBUGGER) |
131 | /* The table of shell function definitions that the user defined or that | |
132 | came from the environment. */ | |
133 | HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL; | |
134 | #endif | |
135 | ||
726f6388 JA |
136 | /* The current variable context. This is really a count of how deep into |
137 | executing functions we are. */ | |
138 | int variable_context = 0; | |
139 | ||
8b6b8f60 CR |
140 | /* If non-zero, local variables inherit values and attributes from a variable |
141 | with the same name at a previous scope. */ | |
1110e308 | 142 | int localvar_inherit = 0; |
8b6b8f60 | 143 | |
bf5b8103 CR |
144 | /* If non-zero, calling `unset' on local variables in previous scopes marks |
145 | them as invisible so lookups find them unset. This is the same behavior | |
146 | as local variables in the current local scope. */ | |
147 | int localvar_unset = 0; | |
148 | ||
7117c2d2 | 149 | /* The set of shell assignments which are made only in the environment |
726f6388 | 150 | for a single command. */ |
7117c2d2 | 151 | HASH_TABLE *temporary_env = (HASH_TABLE *)NULL; |
726f6388 | 152 | |
56299fa5 CR |
153 | /* Set to non-zero if an assignment error occurs while putting variables |
154 | into the temporary environment. */ | |
155 | int tempenv_assign_error; | |
156 | ||
726f6388 JA |
157 | /* Some funky variables which are known about specially. Here is where |
158 | "$*", "$1", and all the cruft is kept. */ | |
159 | char *dollar_vars[10]; | |
160 | WORD_LIST *rest_of_args = (WORD_LIST *)NULL; | |
89d788fb | 161 | int posparam_count = 0; |
726f6388 JA |
162 | |
163 | /* The value of $$. */ | |
f73dda09 | 164 | pid_t dollar_dollar_pid; |
726f6388 | 165 | |
d7f49990 CR |
166 | /* Non-zero means that we have to remake EXPORT_ENV. */ |
167 | int array_needs_making = 1; | |
168 | ||
169 | /* The number of times BASH has been executed. This is set | |
170 | by initialize_variables (). */ | |
171 | int shell_level = 0; | |
172 | ||
726f6388 | 173 | /* An array which is passed to commands as their environment. It is |
d166f048 | 174 | manufactured from the union of the initial environment and the |
726f6388 JA |
175 | shell variables that are marked for export. */ |
176 | char **export_env = (char **)NULL; | |
d166f048 | 177 | static int export_env_index; |
5b512e11 | 178 | static size_t export_env_size; |
726f6388 | 179 | |
ac58e8c8 CR |
180 | #if defined (READLINE) |
181 | static int winsize_assignment; /* currently assigning to LINES or COLUMNS */ | |
ac58e8c8 CR |
182 | #endif |
183 | ||
bddda3d2 CR |
184 | SHELL_VAR nameref_invalid_value; |
185 | static SHELL_VAR nameref_maxloop_value; | |
186 | ||
21af69d5 | 187 | static HASH_TABLE *last_table_searched; /* hash_lookup sets this */ |
8bf3cfef | 188 | static VAR_CONTEXT *last_context_searched; |
21af69d5 | 189 | |
726f6388 | 190 | /* Some forward declarations. */ |
a61ffa78 CR |
191 | static void create_variable_tables (void); |
192 | ||
193 | static void set_machine_vars (void); | |
194 | static void set_home_var (void); | |
195 | static void set_shell_var (void); | |
196 | static char *get_bash_name (void); | |
197 | static void initialize_shell_level (void); | |
198 | static void uidset (void); | |
f73dda09 | 199 | #if defined (ARRAY_VARS) |
a61ffa78 | 200 | static void make_vers_array (void); |
f73dda09 | 201 | #endif |
f73dda09 | 202 | |
a61ffa78 | 203 | static SHELL_VAR *null_assign (SHELL_VAR *, char *, arrayind_t, char *); |
7117c2d2 | 204 | #if defined (ARRAY_VARS) |
a61ffa78 | 205 | static SHELL_VAR *null_array_assign (SHELL_VAR *, char *, arrayind_t, char *); |
7117c2d2 | 206 | #endif |
a61ffa78 | 207 | static SHELL_VAR *get_self (SHELL_VAR *); |
d3a24ed2 CR |
208 | |
209 | #if defined (ARRAY_VARS) | |
a61ffa78 CR |
210 | static SHELL_VAR *init_dynamic_array_var (char *, sh_var_value_func_t *, sh_var_assign_func_t *, int); |
211 | static SHELL_VAR *init_dynamic_assoc_var (char *, sh_var_value_func_t *, sh_var_assign_func_t *, int); | |
d3a24ed2 | 212 | #endif |
7117c2d2 | 213 | |
567c0bc2 CR |
214 | static inline SHELL_VAR *set_int_value (SHELL_VAR *, intmax_t, int); |
215 | static inline SHELL_VAR *set_string_value (SHELL_VAR *, const char *, int); | |
216 | ||
a61ffa78 CR |
217 | static SHELL_VAR *assign_seconds (SHELL_VAR *, char *, arrayind_t, char *); |
218 | static SHELL_VAR *get_seconds (SHELL_VAR *); | |
219 | static SHELL_VAR *init_seconds_var (void); | |
7117c2d2 | 220 | |
fc29a024 CR |
221 | static SHELL_VAR *get_monoseconds (SHELL_VAR *); |
222 | ||
a61ffa78 CR |
223 | static SHELL_VAR *assign_random (SHELL_VAR *, char *, arrayind_t, char *); |
224 | static SHELL_VAR *get_random (SHELL_VAR *); | |
f73dda09 | 225 | |
a61ffa78 | 226 | static SHELL_VAR *get_urandom (SHELL_VAR *); |
376c9fe5 | 227 | |
a61ffa78 CR |
228 | static SHELL_VAR *assign_lineno (SHELL_VAR *, char *, arrayind_t, char *); |
229 | static SHELL_VAR *get_lineno (SHELL_VAR *); | |
f73dda09 | 230 | |
a61ffa78 CR |
231 | static SHELL_VAR *assign_subshell (SHELL_VAR *, char *, arrayind_t, char *); |
232 | static SHELL_VAR *get_subshell (SHELL_VAR *); | |
d3a24ed2 | 233 | |
a61ffa78 CR |
234 | static SHELL_VAR *get_epochseconds (SHELL_VAR *); |
235 | static SHELL_VAR *get_epochrealtime (SHELL_VAR *); | |
553a7d66 | 236 | |
a61ffa78 | 237 | static SHELL_VAR *get_bashpid (SHELL_VAR *); |
d3ad40de | 238 | |
a61ffa78 CR |
239 | static SHELL_VAR *get_bash_argv0 (SHELL_VAR *); |
240 | static SHELL_VAR *assign_bash_argv0 (SHELL_VAR *, char *, arrayind_t, char *); | |
241 | static void set_argv0 (void); | |
f6029107 | 242 | |
7117c2d2 | 243 | #if defined (HISTORY) |
a61ffa78 | 244 | static SHELL_VAR *get_histcmd (SHELL_VAR *); |
7117c2d2 JA |
245 | #endif |
246 | ||
fdf670ea | 247 | #if defined (READLINE) |
a61ffa78 CR |
248 | static SHELL_VAR *get_comp_wordbreaks (SHELL_VAR *); |
249 | static SHELL_VAR *assign_comp_wordbreaks (SHELL_VAR *, char *, arrayind_t, char *); | |
fdf670ea CR |
250 | #endif |
251 | ||
7117c2d2 | 252 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
a61ffa78 CR |
253 | static SHELL_VAR *assign_dirstack (SHELL_VAR *, char *, arrayind_t, char *); |
254 | static SHELL_VAR *get_dirstack (SHELL_VAR *); | |
7117c2d2 JA |
255 | #endif |
256 | ||
257 | #if defined (ARRAY_VARS) | |
a61ffa78 | 258 | static SHELL_VAR *get_groupset (SHELL_VAR *); |
c181950a | 259 | # if defined (DEBUGGER) |
a61ffa78 | 260 | static SHELL_VAR *get_bashargcv (SHELL_VAR *); |
c181950a | 261 | # endif |
a61ffa78 CR |
262 | static SHELL_VAR *build_hashcmd (SHELL_VAR *); |
263 | static SHELL_VAR *get_hashcmd (SHELL_VAR *); | |
b2613ad1 | 264 | static SHELL_VAR *assign_hashcmd (SHELL_VAR *, char *, arrayind_t, char *); |
2c471a92 | 265 | # if defined (ALIAS) |
a61ffa78 CR |
266 | static SHELL_VAR *build_aliasvar (SHELL_VAR *); |
267 | static SHELL_VAR *get_aliasvar (SHELL_VAR *); | |
b2613ad1 | 268 | static SHELL_VAR *assign_aliasvar (SHELL_VAR *, char *, arrayind_t, char *); |
2c471a92 | 269 | # endif |
7117c2d2 JA |
270 | #endif |
271 | ||
a61ffa78 CR |
272 | static SHELL_VAR *get_funcname (SHELL_VAR *); |
273 | static SHELL_VAR *init_funcname_var (void); | |
7117c2d2 | 274 | |
a61ffa78 | 275 | static void initialize_dynamic_variables (void); |
7117c2d2 | 276 | |
b2613ad1 | 277 | static SHELL_VAR *bind_invalid_envvar (const char *, const char *, int); |
8d125d8b | 278 | |
a61ffa78 | 279 | static int var_sametype (SHELL_VAR *, SHELL_VAR *); |
b3bb7f60 | 280 | |
a61ffa78 CR |
281 | static SHELL_VAR *hash_lookup (const char *, HASH_TABLE *); |
282 | static SHELL_VAR *new_shell_variable (const char *); | |
283 | static SHELL_VAR *make_new_variable (const char *, HASH_TABLE *); | |
b2613ad1 | 284 | static SHELL_VAR *bind_variable_internal (const char *, const char *, HASH_TABLE *, int, int); |
7117c2d2 | 285 | |
4e4cebb6 CR |
286 | static void init_shell_variable (SHELL_VAR *); |
287 | ||
a61ffa78 CR |
288 | static void dispose_variable_value (SHELL_VAR *); |
289 | static void free_variable_hash_data (PTR_T); | |
7117c2d2 | 290 | |
5b512e11 CR |
291 | static VARLIST *vlist_alloc (size_t); |
292 | static VARLIST *vlist_realloc (VARLIST *, size_t); | |
a61ffa78 | 293 | static void vlist_add (VARLIST *, SHELL_VAR *, int); |
7117c2d2 | 294 | |
a61ffa78 | 295 | static void flatten (HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int); |
7117c2d2 | 296 | |
a61ffa78 | 297 | static int qsort_var_comp (SHELL_VAR **, SHELL_VAR **); |
f73dda09 | 298 | |
a61ffa78 CR |
299 | static SHELL_VAR **vapply (sh_var_map_func_t *); |
300 | static SHELL_VAR **fapply (sh_var_map_func_t *); | |
f73dda09 | 301 | |
a61ffa78 CR |
302 | static int visible_var (SHELL_VAR *); |
303 | static int visible_and_exported (SHELL_VAR *); | |
304 | static int export_environment_candidate (SHELL_VAR *); | |
305 | static int local_and_exported (SHELL_VAR *); | |
306 | static int visible_variable_in_context (SHELL_VAR *); | |
307 | static int variable_in_context (SHELL_VAR *); | |
f73dda09 | 308 | #if defined (ARRAY_VARS) |
a61ffa78 | 309 | static int visible_array_vars (SHELL_VAR *); |
f73dda09 JA |
310 | #endif |
311 | ||
a61ffa78 | 312 | static SHELL_VAR *find_variable_internal (const char *, int); |
80df5e50 | 313 | |
a61ffa78 CR |
314 | static SHELL_VAR *find_nameref_at_context (SHELL_VAR *, VAR_CONTEXT *); |
315 | static SHELL_VAR *find_variable_nameref_context (SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **); | |
316 | static SHELL_VAR *find_variable_last_nameref_context (SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **); | |
d42cb8c1 | 317 | |
b2613ad1 | 318 | static SHELL_VAR *bind_tempenv_variable (const char *, const char *); |
a61ffa78 CR |
319 | static void push_posix_temp_var (PTR_T); |
320 | static void push_temp_var (PTR_T); | |
321 | static void propagate_temp_var (PTR_T); | |
322 | static void dispose_temporary_env (sh_free_func_t *); | |
7117c2d2 | 323 | |
a61ffa78 CR |
324 | static inline char *mk_env_string (const char *, const char *, int); |
325 | static char **make_env_array_from_var_list (SHELL_VAR **); | |
326 | static char **make_var_export_array (VAR_CONTEXT *); | |
327 | static char **make_func_export_array (void); | |
328 | static void add_temp_array_to_env (char **, int, int); | |
f73dda09 | 329 | |
a61ffa78 CR |
330 | static int n_shell_variables (void); |
331 | static int set_context (SHELL_VAR *); | |
726f6388 | 332 | |
a61ffa78 CR |
333 | static void push_func_var (PTR_T); |
334 | static void push_builtin_var (PTR_T); | |
335 | static void push_exported_var (PTR_T); | |
726f6388 | 336 | |
a61ffa78 | 337 | static void delete_local_contexts (VAR_CONTEXT *); |
52ae6c3f | 338 | |
d11d7984 | 339 | /* This needs to be looked at again. */ |
a61ffa78 | 340 | static inline void push_posix_tempvar_internal (SHELL_VAR *, int); |
c87bb0a8 | 341 | |
a61ffa78 | 342 | static inline int find_special_var (const char *); |
28157acd | 343 | |
d3ad40de | 344 | static void |
a61ffa78 | 345 | create_variable_tables (void) |
d3ad40de | 346 | { |
cce855bc | 347 | if (shell_variables == 0) |
7117c2d2 JA |
348 | { |
349 | shell_variables = global_variables = new_var_context ((char *)NULL, 0); | |
350 | shell_variables->scope = 0; | |
85ec0778 | 351 | shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
7117c2d2 | 352 | } |
726f6388 | 353 | |
cce855bc | 354 | if (shell_functions == 0) |
48abf0fd | 355 | shell_functions = hash_create (FUNCTIONS_HASH_BUCKETS); |
726f6388 | 356 | |
d3a24ed2 CR |
357 | #if defined (DEBUGGER) |
358 | if (shell_function_defs == 0) | |
48abf0fd | 359 | shell_function_defs = hash_create (FUNCTIONS_HASH_BUCKETS); |
d3a24ed2 | 360 | #endif |
d3ad40de CR |
361 | } |
362 | ||
363 | /* Initialize the shell variables from the current environment. | |
364 | If PRIVMODE is nonzero, don't import functions from ENV or | |
365 | parse $SHELLOPTS. */ | |
366 | void | |
a61ffa78 | 367 | initialize_shell_variables (char **env, int privmode) |
d3ad40de CR |
368 | { |
369 | char *name, *string, *temp_string; | |
c5402025 | 370 | int c, char_index, string_index, string_length, ro; |
d3ad40de CR |
371 | SHELL_VAR *temp_var; |
372 | ||
373 | create_variable_tables (); | |
d3a24ed2 | 374 | |
dcb2f448 | 375 | for (string_index = 0; env && (string = env[string_index++]); ) |
726f6388 | 376 | { |
726f6388 | 377 | char_index = 0; |
d166f048 | 378 | name = string; |
726f6388 | 379 | while ((c = *string++) && c != '=') |
d166f048 JA |
380 | ; |
381 | if (string[-1] == '=') | |
28ef6c31 | 382 | char_index = string - name - 1; |
726f6388 | 383 | |
d166f048 JA |
384 | /* If there are weird things in the environment, like `=xxx' or a |
385 | string without an `=', just skip them. */ | |
386 | if (char_index == 0) | |
28ef6c31 | 387 | continue; |
d166f048 JA |
388 | |
389 | /* ASSERT(name[char_index] == '=') */ | |
726f6388 | 390 | name[char_index] = '\0'; |
d166f048 | 391 | /* Now, name = env variable name, string = env variable value, and |
28ef6c31 | 392 | char_index == strlen (name) */ |
726f6388 | 393 | |
012bac39 CR |
394 | temp_var = (SHELL_VAR *)NULL; |
395 | ||
f3aad56d | 396 | #if defined (FUNCTION_IMPORT) |
f73dda09 | 397 | /* If exported function, define it now. Don't import functions from |
7117c2d2 | 398 | the environment in privileged mode. */ |
30595b57 CR |
399 | if (privmode == 0 && read_but_dont_execute == 0 && |
400 | STREQN (BASHFUNC_PREFIX, name, BASHFUNC_PREFLEN) && | |
401 | STREQ (BASHFUNC_SUFFIX, name + char_index - BASHFUNC_SUFFLEN) && | |
402 | STREQN ("() {", string, 4)) | |
726f6388 | 403 | { |
30595b57 CR |
404 | size_t namelen; |
405 | char *tname; /* desired imported function name */ | |
406 | ||
407 | namelen = char_index - BASHFUNC_PREFLEN - BASHFUNC_SUFFLEN; | |
408 | ||
409 | tname = name + BASHFUNC_PREFLEN; /* start of func name */ | |
410 | tname[namelen] = '\0'; /* now tname == func name */ | |
411 | ||
d166f048 | 412 | string_length = strlen (string); |
30595b57 | 413 | temp_string = (char *)xmalloc (namelen + string_length + 2); |
bb70624e | 414 | |
30595b57 CR |
415 | memcpy (temp_string, tname, namelen); |
416 | temp_string[namelen] = ' '; | |
417 | memcpy (temp_string + namelen + 1, string, string_length + 1); | |
726f6388 | 418 | |
96f3fb66 | 419 | /* Don't import function names that are invalid identifiers from the |
613d4ba4 CR |
420 | environment in posix mode, though we still allow them to be defined as |
421 | shell variables. */ | |
30595b57 CR |
422 | if (absolute_program (tname) == 0 && (posixly_correct == 0 || legal_identifier (tname))) |
423 | parse_and_execute (temp_string, tname, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD); | |
613d4ba4 CR |
424 | else |
425 | free (temp_string); /* parse_and_execute does this */ | |
726f6388 | 426 | |
30595b57 | 427 | if (temp_var = find_function (tname)) |
726f6388 | 428 | { |
bb70624e | 429 | VSETATTR (temp_var, (att_exported|att_imported)); |
726f6388 JA |
430 | array_needs_making = 1; |
431 | } | |
432 | else | |
1f6ec1a8 | 433 | { |
8d125d8b | 434 | if (temp_var = bind_invalid_envvar (name, string, 0)) |
208fdb50 CR |
435 | { |
436 | VSETATTR (temp_var, (att_exported | att_imported | att_invisible)); | |
437 | array_needs_making = 1; | |
438 | } | |
194cfc28 | 439 | last_command_exit_value = EXECUTION_FAILURE; |
30595b57 | 440 | report_error (_("error importing function definition for `%s'"), tname); |
1f6ec1a8 | 441 | } |
30595b57 CR |
442 | |
443 | /* Restore original suffix */ | |
444 | tname[namelen] = BASHFUNC_SUFFIX[0]; | |
726f6388 | 445 | } |
85ec0778 | 446 | else |
f3aad56d | 447 | #endif /* FUNCTION_IMPORT */ |
ccc6cda3 | 448 | #if defined (ARRAY_VARS) |
200aed9a | 449 | # if ARRAY_EXPORT |
ccc6cda3 | 450 | /* Array variables may not yet be exported. */ |
d70b5339 CR |
451 | if (STREQN (BASHARRAY_PREFIX, name, BASHARRAY_PREFLEN) && |
452 | STREQN (BASHARRAY_SUFFIX, name + char_index - BASHARRAY_SUFFLEN, BASHARRAY_SUFFLEN) && | |
453 | *string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')') | |
ccc6cda3 | 454 | { |
d70b5339 CR |
455 | size_t namelen; |
456 | char *tname; /* desired imported array variable name */ | |
457 | ||
458 | namelen = char_index - BASHARRAY_PREFLEN - BASHARRAY_SUFFLEN; | |
459 | ||
460 | tname = name + BASHARRAY_PREFLEN; /* start of variable name */ | |
461 | tname[namelen] = '\0'; /* now tname == varname */ | |
462 | ||
ccc6cda3 JA |
463 | string_length = 1; |
464 | temp_string = extract_array_assignment_list (string, &string_length); | |
d70b5339 | 465 | temp_var = assign_array_from_string (tname, temp_string, 0); |
ccc6cda3 | 466 | FREE (temp_string); |
6a9e77e8 | 467 | if (temp_var && noassign_p (temp_var) == 0) |
d70b5339 CR |
468 | { |
469 | VSETATTR (temp_var, (att_exported | att_imported)); | |
470 | array_needs_making = 1; | |
471 | } | |
472 | } | |
473 | else if (STREQN (BASHASSOC_PREFIX, name, BASHASSOC_PREFLEN) && | |
474 | STREQN (BASHASSOC_SUFFIX, name + char_index - BASHASSOC_SUFFLEN, BASHASSOC_SUFFLEN) && | |
475 | *string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')') | |
476 | { | |
477 | size_t namelen; | |
478 | char *tname; /* desired imported assoc variable name */ | |
479 | ||
480 | namelen = char_index - BASHASSOC_PREFLEN - BASHASSOC_SUFFLEN; | |
481 | ||
482 | tname = name + BASHASSOC_PREFLEN; /* start of variable name */ | |
483 | tname[namelen] = '\0'; /* now tname == varname */ | |
484 | ||
485 | /* need to make sure it exists as an associative array first */ | |
486 | temp_var = find_or_make_array_variable (tname, 2); | |
6a9e77e8 CR |
487 | if (temp_var && noassign_p (temp_var)) |
488 | temp_var = 0; | |
d70b5339 CR |
489 | if (temp_var) |
490 | { | |
491 | string_length = 1; | |
492 | temp_string = extract_array_assignment_list (string, &string_length); | |
493 | temp_var = assign_array_var_from_string (temp_var, temp_string, 0); | |
494 | } | |
495 | FREE (temp_string); | |
496 | if (temp_var) | |
497 | { | |
498 | VSETATTR (temp_var, (att_exported | att_imported)); | |
499 | array_needs_making = 1; | |
500 | } | |
ccc6cda3 | 501 | } |
85ec0778 | 502 | else |
200aed9a | 503 | # endif /* ARRAY_EXPORT */ |
ccc6cda3 | 504 | #endif |
726f6388 | 505 | { |
c5402025 | 506 | ro = 0; |
f698849a CR |
507 | /* If we processed a command-line option that caused SHELLOPTS to be |
508 | set, it may already be set (and read-only) by the time we process | |
509 | the shell's environment. */ | |
510 | if (/* posixly_correct &&*/ STREQ (name, "SHELLOPTS")) | |
c5402025 CR |
511 | { |
512 | temp_var = find_variable ("SHELLOPTS"); | |
513 | ro = temp_var && readonly_p (temp_var); | |
514 | if (temp_var) | |
515 | VUNSETATTR (temp_var, att_readonly); | |
516 | } | |
8d125d8b | 517 | if (legal_identifier (name)) |
5f8cde23 | 518 | { |
8d125d8b CR |
519 | temp_var = bind_variable (name, string, 0); |
520 | if (temp_var) | |
521 | { | |
522 | VSETATTR (temp_var, (att_exported | att_imported)); | |
523 | if (ro) | |
524 | VSETATTR (temp_var, att_readonly); | |
525 | } | |
526 | } | |
527 | else | |
528 | { | |
529 | temp_var = bind_invalid_envvar (name, string, 0); | |
530 | if (temp_var) | |
5f8cde23 | 531 | VSETATTR (temp_var, (att_exported | att_imported | att_invisible)); |
5f8cde23 | 532 | } |
8d125d8b CR |
533 | if (temp_var) |
534 | array_needs_making = 1; | |
726f6388 | 535 | } |
d166f048 JA |
536 | |
537 | name[char_index] = '='; | |
bb70624e | 538 | /* temp_var can be NULL if it was an exported function with a syntax |
28ef6c31 | 539 | error (a different bug, but it still shouldn't dump core). */ |
bb70624e JA |
540 | if (temp_var && function_p (temp_var) == 0) /* XXX not yet */ |
541 | { | |
542 | CACHE_IMPORTSTR (temp_var, name); | |
543 | } | |
726f6388 JA |
544 | } |
545 | ||
28ef6c31 | 546 | set_pwd (); |
b72432fd | 547 | |
ccc6cda3 | 548 | /* Set up initial value of $_ */ |
cc87ba64 | 549 | temp_var = set_if_not ("_", dollar_vars[0]); |
ccc6cda3 | 550 | |
726f6388 | 551 | /* Remember this pid. */ |
f73dda09 | 552 | dollar_dollar_pid = getpid (); |
726f6388 JA |
553 | |
554 | /* Now make our own defaults in case the vars that we think are | |
555 | important are missing. */ | |
556 | temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE); | |
726f6388 | 557 | temp_var = set_if_not ("TERM", "dumb"); |
726f6388 | 558 | |
70694d2e | 559 | #if defined (__QNX__) |
d166f048 JA |
560 | /* set node id -- don't import it from the environment */ |
561 | { | |
562 | char node_name[22]; | |
70694d2e | 563 | # if defined (__QNXNTO__) |
fd3925f1 CR |
564 | netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name)); |
565 | # else | |
d166f048 | 566 | qnx_nidtostr (getnid (), node_name, sizeof (node_name)); |
fd3925f1 | 567 | # endif |
d11b8b46 | 568 | temp_var = bind_variable ("NODE", node_name, 0); |
bddda3d2 CR |
569 | if (temp_var) |
570 | set_auto_export (temp_var); | |
d166f048 JA |
571 | } |
572 | #endif | |
573 | ||
ccc6cda3 | 574 | /* set up the prompts. */ |
726f6388 JA |
575 | if (interactive_shell) |
576 | { | |
b72432fd | 577 | #if defined (PROMPT_STRING_DECODE) |
726f6388 | 578 | set_if_not ("PS1", primary_prompt); |
b72432fd JA |
579 | #else |
580 | if (current_user.uid == -1) | |
581 | get_current_user_info (); | |
582 | set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt); | |
583 | #endif | |
726f6388 JA |
584 | set_if_not ("PS2", secondary_prompt); |
585 | } | |
6f82653c CR |
586 | |
587 | if (current_user.euid == 0) | |
c5cc27c8 | 588 | bind_variable ("PS4", "+ ", 0); |
6f82653c CR |
589 | else |
590 | set_if_not ("PS4", "+ "); | |
726f6388 | 591 | |
ccc6cda3 | 592 | /* Don't allow IFS to be imported from the environment. */ |
d11b8b46 | 593 | temp_var = bind_variable ("IFS", " \t\n", 0); |
7117c2d2 | 594 | setifs (temp_var); |
726f6388 JA |
595 | |
596 | /* Magic machine types. Pretty convenient. */ | |
f73dda09 | 597 | set_machine_vars (); |
726f6388 | 598 | |
ccc6cda3 JA |
599 | /* Default MAILCHECK for interactive shells. Defer the creation of a |
600 | default MAILPATH until the startup files are read, because MAIL | |
f73dda09 | 601 | names a mail file if MAILPATH is not set, and we should provide a |
ccc6cda3 | 602 | default only if neither is set. */ |
726f6388 | 603 | if (interactive_shell) |
6e70dbff CR |
604 | { |
605 | temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60"); | |
606 | VSETATTR (temp_var, att_integer); | |
607 | } | |
726f6388 JA |
608 | |
609 | /* Do some things with shell level. */ | |
d166f048 | 610 | initialize_shell_level (); |
726f6388 | 611 | |
b72432fd | 612 | set_ppid (); |
726f6388 | 613 | |
f6029107 CR |
614 | set_argv0 (); |
615 | ||
726f6388 | 616 | /* Initialize the `getopts' stuff. */ |
6e70dbff CR |
617 | temp_var = bind_variable ("OPTIND", "1", 0); |
618 | VSETATTR (temp_var, att_integer); | |
d166f048 | 619 | getopts_reset (0); |
d11b8b46 | 620 | bind_variable ("OPTERR", "1", 0); |
d166f048 JA |
621 | sh_opterr = 1; |
622 | ||
8d618825 | 623 | if (login_shell == 1 && posixly_correct == 0) |
d166f048 | 624 | set_home_var (); |
726f6388 JA |
625 | |
626 | /* Get the full pathname to THIS shell, and set the BASH variable | |
627 | to it. */ | |
d166f048 | 628 | name = get_bash_name (); |
d11b8b46 | 629 | temp_var = bind_variable ("BASH", name, 0); |
ccc6cda3 JA |
630 | free (name); |
631 | ||
632 | /* Make the exported environment variable SHELL be the user's login | |
633 | shell. Note that the `tset' command looks at this variable | |
634 | to determine what style of commands to output; if it ends in "csh", | |
635 | then C-shell commands are output, else Bourne shell commands. */ | |
d166f048 | 636 | set_shell_var (); |
726f6388 JA |
637 | |
638 | /* Make a variable called BASH_VERSION which contains the version info. */ | |
d11b8b46 | 639 | bind_variable ("BASH_VERSION", shell_version_string (), 0); |
ccc6cda3 JA |
640 | #if defined (ARRAY_VARS) |
641 | make_vers_array (); | |
642 | #endif | |
726f6388 | 643 | |
d3a24ed2 | 644 | if (command_execution_string) |
d11b8b46 | 645 | bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0); |
d3a24ed2 | 646 | |
726f6388 JA |
647 | /* Find out if we're supposed to be in Posix.2 mode via an |
648 | environment variable. */ | |
649 | temp_var = find_variable ("POSIXLY_CORRECT"); | |
650 | if (!temp_var) | |
651 | temp_var = find_variable ("POSIX_PEDANTIC"); | |
652 | if (temp_var && imported_p (temp_var)) | |
653 | sv_strict_posix (temp_var->name); | |
654 | ||
655 | #if defined (HISTORY) | |
656 | /* Set history variables to defaults, and then do whatever we would | |
657 | do if the variable had just been set. Do this only in the case | |
658 | that we are remembering commands on the history list. */ | |
659 | if (remember_on_history) | |
660 | { | |
7117c2d2 | 661 | name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0); |
726f6388 JA |
662 | |
663 | set_if_not ("HISTFILE", name); | |
664 | free (name); | |
726f6388 JA |
665 | } |
666 | #endif /* HISTORY */ | |
667 | ||
376c9fe5 | 668 | /* Seed the random number generators. */ |
35bb237e | 669 | seedrand (); |
376c9fe5 | 670 | seedrand32 (); |
726f6388 JA |
671 | |
672 | /* Handle some "special" variables that we may have inherited from a | |
673 | parent shell. */ | |
d166f048 JA |
674 | if (interactive_shell) |
675 | { | |
676 | temp_var = find_variable ("IGNOREEOF"); | |
677 | if (!temp_var) | |
678 | temp_var = find_variable ("ignoreeof"); | |
679 | if (temp_var && imported_p (temp_var)) | |
680 | sv_ignoreeof (temp_var->name); | |
681 | } | |
726f6388 JA |
682 | |
683 | #if defined (HISTORY) | |
684 | if (interactive_shell && remember_on_history) | |
685 | { | |
ccc6cda3 JA |
686 | sv_history_control ("HISTCONTROL"); |
687 | sv_histignore ("HISTIGNORE"); | |
d3ad40de | 688 | sv_histtimefmt ("HISTTIMEFORMAT"); |
726f6388 JA |
689 | } |
690 | #endif /* HISTORY */ | |
691 | ||
ac58e8c8 | 692 | #if defined (READLINE) && defined (STRICT_POSIX) |
f698849a CR |
693 | /* POSIXLY_CORRECT will be 1 here if the shell was compiled |
694 | -DSTRICT_POSIX or if POSIXLY_CORRECT was supplied in the shell's | |
695 | environment */ | |
ac58e8c8 CR |
696 | if (interactive_shell && posixly_correct && no_line_editing == 0) |
697 | rl_prefer_env_winsize = 1; | |
698 | #endif /* READLINE && STRICT_POSIX */ | |
699 | ||
ccc6cda3 JA |
700 | /* Get the user's real and effective user ids. */ |
701 | uidset (); | |
702 | ||
fb4ddc2d CR |
703 | temp_var = set_if_not ("BASH_LOADABLES_PATH", DEFAULT_LOADABLE_BUILTINS_PATH); |
704 | ||
67362c60 CR |
705 | temp_var = find_variable ("BASH_XTRACEFD"); |
706 | if (temp_var && imported_p (temp_var)) | |
707 | sv_xtracefd (temp_var->name); | |
708 | ||
33723c84 CR |
709 | sv_shcompat ("BASH_COMPAT"); |
710 | ||
0f0e2f21 CR |
711 | /* Allow FUNCNEST to be inherited from the environment. */ |
712 | sv_funcnest ("FUNCNEST"); | |
713 | ||
726f6388 JA |
714 | /* Initialize the dynamic variables, and seed their values. */ |
715 | initialize_dynamic_variables (); | |
726f6388 JA |
716 | } |
717 | ||
7117c2d2 JA |
718 | /* **************************************************************** */ |
719 | /* */ | |
720 | /* Setting values for special shell variables */ | |
721 | /* */ | |
722 | /* **************************************************************** */ | |
723 | ||
f73dda09 | 724 | static void |
a61ffa78 | 725 | set_machine_vars (void) |
f73dda09 JA |
726 | { |
727 | SHELL_VAR *temp_var; | |
728 | ||
729 | temp_var = set_if_not ("HOSTTYPE", HOSTTYPE); | |
730 | temp_var = set_if_not ("OSTYPE", OSTYPE); | |
731 | temp_var = set_if_not ("MACHTYPE", MACHTYPE); | |
732 | ||
733 | temp_var = set_if_not ("HOSTNAME", current_host_name); | |
734 | } | |
735 | ||
d166f048 JA |
736 | /* Set $HOME to the information in the password file if we didn't get |
737 | it from the environment. */ | |
b72432fd JA |
738 | |
739 | /* This function is not static so the tilde and readline libraries can | |
740 | use it. */ | |
741 | char * | |
a61ffa78 | 742 | sh_get_home_dir (void) |
b72432fd JA |
743 | { |
744 | if (current_user.home_dir == 0) | |
745 | get_current_user_info (); | |
746 | return current_user.home_dir; | |
747 | } | |
748 | ||
d166f048 | 749 | static void |
a61ffa78 | 750 | set_home_var (void) |
d166f048 JA |
751 | { |
752 | SHELL_VAR *temp_var; | |
753 | ||
754 | temp_var = find_variable ("HOME"); | |
755 | if (temp_var == 0) | |
d11b8b46 | 756 | temp_var = bind_variable ("HOME", sh_get_home_dir (), 0); |
f73dda09 | 757 | #if 0 |
bb70624e | 758 | VSETATTR (temp_var, att_exported); |
f73dda09 | 759 | #endif |
d166f048 JA |
760 | } |
761 | ||
762 | /* Set $SHELL to the user's login shell if it is not already set. Call | |
763 | get_current_user_info if we haven't already fetched the shell. */ | |
764 | static void | |
a61ffa78 | 765 | set_shell_var (void) |
d166f048 JA |
766 | { |
767 | SHELL_VAR *temp_var; | |
768 | ||
769 | temp_var = find_variable ("SHELL"); | |
770 | if (temp_var == 0) | |
771 | { | |
772 | if (current_user.shell == 0) | |
773 | get_current_user_info (); | |
d11b8b46 | 774 | temp_var = bind_variable ("SHELL", current_user.shell, 0); |
d166f048 | 775 | } |
f73dda09 | 776 | #if 0 |
bb70624e | 777 | VSETATTR (temp_var, att_exported); |
f73dda09 | 778 | #endif |
d166f048 JA |
779 | } |
780 | ||
781 | static char * | |
a61ffa78 | 782 | get_bash_name (void) |
d166f048 JA |
783 | { |
784 | char *name; | |
785 | ||
28ef6c31 | 786 | if ((login_shell == 1) && RELPATH(shell_name)) |
d166f048 JA |
787 | { |
788 | if (current_user.shell == 0) | |
28ef6c31 | 789 | get_current_user_info (); |
d166f048 JA |
790 | name = savestring (current_user.shell); |
791 | } | |
28ef6c31 | 792 | else if (ABSPATH(shell_name)) |
d166f048 JA |
793 | name = savestring (shell_name); |
794 | else if (shell_name[0] == '.' && shell_name[1] == '/') | |
795 | { | |
796 | /* Fast path for common case. */ | |
797 | char *cdir; | |
2e725f73 | 798 | size_t len; |
d166f048 JA |
799 | |
800 | cdir = get_string_value ("PWD"); | |
28ef6c31 JA |
801 | if (cdir) |
802 | { | |
803 | len = strlen (cdir); | |
f73dda09 | 804 | name = (char *)xmalloc (len + strlen (shell_name) + 1); |
28ef6c31 JA |
805 | strcpy (name, cdir); |
806 | strcpy (name + len, shell_name + 1); | |
807 | } | |
808 | else | |
809 | name = savestring (shell_name); | |
d166f048 JA |
810 | } |
811 | else | |
812 | { | |
813 | char *tname; | |
814 | int s; | |
815 | ||
816 | tname = find_user_command (shell_name); | |
817 | ||
818 | if (tname == 0) | |
819 | { | |
820 | /* Try the current directory. If there is not an executable | |
821 | there, just punt and use the login shell. */ | |
822 | s = file_status (shell_name); | |
823 | if (s & FS_EXECABLE) | |
824 | { | |
825 | tname = make_absolute (shell_name, get_string_value ("PWD")); | |
826 | if (*shell_name == '.') | |
827 | { | |
28ef6c31 | 828 | name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); |
d166f048 JA |
829 | if (name == 0) |
830 | name = tname; | |
831 | else | |
832 | free (tname); | |
833 | } | |
834 | else | |
835 | name = tname; | |
836 | } | |
837 | else | |
838 | { | |
839 | if (current_user.shell == 0) | |
840 | get_current_user_info (); | |
841 | name = savestring (current_user.shell); | |
842 | } | |
843 | } | |
844 | else | |
845 | { | |
846 | name = full_pathname (tname); | |
847 | free (tname); | |
848 | } | |
849 | } | |
850 | ||
851 | return (name); | |
852 | } | |
853 | ||
726f6388 | 854 | void |
a61ffa78 | 855 | adjust_shell_level (int change) |
726f6388 | 856 | { |
d166f048 | 857 | char new_level[5], *old_SHLVL; |
7117c2d2 | 858 | intmax_t old_level; |
d166f048 | 859 | SHELL_VAR *temp_var; |
726f6388 JA |
860 | |
861 | old_SHLVL = get_string_value ("SHLVL"); | |
f73dda09 JA |
862 | if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0) |
863 | old_level = 0; | |
726f6388 JA |
864 | |
865 | shell_level = old_level + change; | |
866 | if (shell_level < 0) | |
867 | shell_level = 0; | |
dcb2f448 | 868 | else if (shell_level >= 1000) |
d166f048 | 869 | { |
5e13499c | 870 | internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level); |
d166f048 JA |
871 | shell_level = 1; |
872 | } | |
873 | ||
874 | /* We don't need the full generality of itos here. */ | |
875 | if (shell_level < 10) | |
876 | { | |
877 | new_level[0] = shell_level + '0'; | |
878 | new_level[1] = '\0'; | |
879 | } | |
880 | else if (shell_level < 100) | |
881 | { | |
882 | new_level[0] = (shell_level / 10) + '0'; | |
883 | new_level[1] = (shell_level % 10) + '0'; | |
884 | new_level[2] = '\0'; | |
885 | } | |
886 | else if (shell_level < 1000) | |
887 | { | |
888 | new_level[0] = (shell_level / 100) + '0'; | |
889 | old_level = shell_level % 100; | |
890 | new_level[1] = (old_level / 10) + '0'; | |
891 | new_level[2] = (old_level % 10) + '0'; | |
892 | new_level[3] = '\0'; | |
893 | } | |
894 | ||
d11b8b46 | 895 | temp_var = bind_variable ("SHLVL", new_level, 0); |
d166f048 JA |
896 | set_auto_export (temp_var); |
897 | } | |
898 | ||
899 | static void | |
a61ffa78 | 900 | initialize_shell_level (void) |
d166f048 | 901 | { |
d166f048 | 902 | adjust_shell_level (1); |
726f6388 JA |
903 | } |
904 | ||
28ef6c31 JA |
905 | /* If we got PWD from the environment, update our idea of the current |
906 | working directory. In any case, make sure that PWD exists before | |
907 | checking it. It is possible for getcwd () to fail on shell startup, | |
908 | and in that case, PWD would be undefined. If this is an interactive | |
909 | login shell, see if $HOME is the current working directory, and if | |
910 | that's not the same string as $PWD, set PWD=$HOME. */ | |
911 | ||
912 | void | |
a61ffa78 | 913 | set_pwd (void) |
28ef6c31 JA |
914 | { |
915 | SHELL_VAR *temp_var, *home_var; | |
dcb2f448 | 916 | char *temp_string, *home_string, *current_dir; |
28ef6c31 JA |
917 | |
918 | home_var = find_variable ("HOME"); | |
919 | home_string = home_var ? value_cell (home_var) : (char *)NULL; | |
920 | ||
921 | temp_var = find_variable ("PWD"); | |
dcb2f448 | 922 | /* Follow posix rules for importing PWD */ |
28ef6c31 JA |
923 | if (temp_var && imported_p (temp_var) && |
924 | (temp_string = value_cell (temp_var)) && | |
dcb2f448 | 925 | temp_string[0] == '/' && |
28ef6c31 | 926 | same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL)) |
dcb2f448 CR |
927 | { |
928 | current_dir = sh_canonpath (temp_string, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); | |
929 | if (current_dir == 0) | |
930 | current_dir = get_working_directory ("shell_init"); | |
1110e308 | 931 | else |
dcb2f448 | 932 | set_working_directory (current_dir); |
1110e308 CR |
933 | if (posixly_correct && current_dir) |
934 | { | |
935 | temp_var = bind_variable ("PWD", current_dir, 0); | |
936 | set_auto_export (temp_var); | |
937 | } | |
dcb2f448 CR |
938 | free (current_dir); |
939 | } | |
28ef6c31 JA |
940 | else if (home_string && interactive_shell && login_shell && |
941 | same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL)) | |
942 | { | |
943 | set_working_directory (home_string); | |
d11b8b46 | 944 | temp_var = bind_variable ("PWD", home_string, 0); |
28ef6c31 JA |
945 | set_auto_export (temp_var); |
946 | } | |
947 | else | |
948 | { | |
949 | temp_string = get_working_directory ("shell-init"); | |
950 | if (temp_string) | |
951 | { | |
d11b8b46 | 952 | temp_var = bind_variable ("PWD", temp_string, 0); |
28ef6c31 JA |
953 | set_auto_export (temp_var); |
954 | free (temp_string); | |
955 | } | |
956 | } | |
957 | ||
958 | /* According to the Single Unix Specification, v2, $OLDPWD is an | |
e6f5e0c8 CR |
959 | `environment variable' and therefore should be auto-exported. If we |
960 | don't find OLDPWD in the environment, or it doesn't name a directory, | |
961 | make a dummy invisible variable for OLDPWD, and mark it as exported. */ | |
962 | temp_var = find_variable ("OLDPWD"); | |
03e8e2f9 | 963 | #if defined (OLDPWD_CHECK_DIRECTORY) |
e6f5e0c8 | 964 | if (temp_var == 0 || value_cell (temp_var) == 0 || file_isdir (value_cell (temp_var)) == 0) |
03e8e2f9 CR |
965 | #else |
966 | if (temp_var == 0 || value_cell (temp_var) == 0) | |
967 | #endif | |
e6f5e0c8 CR |
968 | { |
969 | temp_var = bind_variable ("OLDPWD", (char *)NULL, 0); | |
970 | VSETATTR (temp_var, (att_exported | att_invisible)); | |
971 | } | |
28ef6c31 JA |
972 | } |
973 | ||
b72432fd JA |
974 | /* Make a variable $PPID, which holds the pid of the shell's parent. */ |
975 | void | |
a61ffa78 | 976 | set_ppid (void) |
b72432fd | 977 | { |
f73dda09 | 978 | char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name; |
b72432fd JA |
979 | SHELL_VAR *temp_var; |
980 | ||
f73dda09 | 981 | name = inttostr (getppid (), namebuf, sizeof(namebuf)); |
b72432fd JA |
982 | temp_var = find_variable ("PPID"); |
983 | if (temp_var) | |
bb70624e | 984 | VUNSETATTR (temp_var, (att_readonly | att_exported)); |
d11b8b46 | 985 | temp_var = bind_variable ("PPID", name, 0); |
bb70624e | 986 | VSETATTR (temp_var, (att_readonly | att_integer)); |
b72432fd JA |
987 | } |
988 | ||
ccc6cda3 | 989 | static void |
a61ffa78 | 990 | uidset (void) |
726f6388 | 991 | { |
f73dda09 | 992 | char buff[INT_STRLEN_BOUND(uid_t) + 1], *b; |
ccc6cda3 JA |
993 | register SHELL_VAR *v; |
994 | ||
b72432fd | 995 | b = inttostr (current_user.uid, buff, sizeof (buff)); |
ccc6cda3 | 996 | v = find_variable ("UID"); |
28ef6c31 JA |
997 | if (v == 0) |
998 | { | |
d11b8b46 | 999 | v = bind_variable ("UID", b, 0); |
28ef6c31 JA |
1000 | VSETATTR (v, (att_readonly | att_integer)); |
1001 | } | |
726f6388 | 1002 | |
ccc6cda3 | 1003 | if (current_user.euid != current_user.uid) |
b72432fd | 1004 | b = inttostr (current_user.euid, buff, sizeof (buff)); |
726f6388 | 1005 | |
ccc6cda3 | 1006 | v = find_variable ("EUID"); |
28ef6c31 JA |
1007 | if (v == 0) |
1008 | { | |
d11b8b46 | 1009 | v = bind_variable ("EUID", b, 0); |
28ef6c31 JA |
1010 | VSETATTR (v, (att_readonly | att_integer)); |
1011 | } | |
ccc6cda3 JA |
1012 | } |
1013 | ||
1014 | #if defined (ARRAY_VARS) | |
1015 | static void | |
a61ffa78 | 1016 | make_vers_array (void) |
ccc6cda3 JA |
1017 | { |
1018 | SHELL_VAR *vv; | |
1019 | ARRAY *av; | |
f73dda09 | 1020 | char *s, d[32], b[INT_STRLEN_BOUND(int) + 1]; |
ccc6cda3 | 1021 | |
bddda3d2 | 1022 | unbind_variable_noref ("BASH_VERSINFO"); |
ccc6cda3 JA |
1023 | |
1024 | vv = make_new_array_variable ("BASH_VERSINFO"); | |
1025 | av = array_cell (vv); | |
1026 | strcpy (d, dist_version); | |
d0ca3503 | 1027 | s = strchr (d, '.'); |
ccc6cda3 JA |
1028 | if (s) |
1029 | *s++ = '\0'; | |
7117c2d2 JA |
1030 | array_insert (av, 0, d); |
1031 | array_insert (av, 1, s); | |
f73dda09 | 1032 | s = inttostr (patch_level, b, sizeof (b)); |
7117c2d2 | 1033 | array_insert (av, 2, s); |
f73dda09 | 1034 | s = inttostr (build_version, b, sizeof (b)); |
7117c2d2 JA |
1035 | array_insert (av, 3, s); |
1036 | array_insert (av, 4, release_status); | |
1037 | array_insert (av, 5, MACHTYPE); | |
ccc6cda3 | 1038 | |
bb70624e | 1039 | VSETATTR (vv, att_readonly); |
ccc6cda3 JA |
1040 | } |
1041 | #endif /* ARRAY_VARS */ | |
1042 | ||
1043 | /* Set the environment variables $LINES and $COLUMNS in response to | |
1044 | a window size change. */ | |
1045 | void | |
a61ffa78 | 1046 | sh_set_lines_and_columns (int lines, int cols) |
ccc6cda3 | 1047 | { |
f73dda09 | 1048 | char val[INT_STRLEN_BOUND(int) + 1], *v; |
ccc6cda3 | 1049 | |
af12dacd | 1050 | #if defined (READLINE) |
ac58e8c8 CR |
1051 | /* If we are currently assigning to LINES or COLUMNS, don't do anything. */ |
1052 | if (winsize_assignment) | |
1053 | return; | |
af12dacd | 1054 | #endif |
ac58e8c8 | 1055 | |
b72432fd | 1056 | v = inttostr (lines, val, sizeof (val)); |
d11b8b46 | 1057 | bind_variable ("LINES", v, 0); |
ccc6cda3 | 1058 | |
b72432fd | 1059 | v = inttostr (cols, val, sizeof (val)); |
d11b8b46 | 1060 | bind_variable ("COLUMNS", v, 0); |
726f6388 JA |
1061 | } |
1062 | ||
7117c2d2 JA |
1063 | /* **************************************************************** */ |
1064 | /* */ | |
1065 | /* Printing variables and values */ | |
1066 | /* */ | |
1067 | /* **************************************************************** */ | |
726f6388 | 1068 | |
28ef6c31 JA |
1069 | /* Print LIST (a list of shell variables) to stdout in such a way that |
1070 | they can be read back in. */ | |
726f6388 | 1071 | void |
a61ffa78 | 1072 | print_var_list (SHELL_VAR **list) |
726f6388 JA |
1073 | { |
1074 | register int i; | |
1075 | register SHELL_VAR *var; | |
1076 | ||
1077 | for (i = 0; list && (var = list[i]); i++) | |
7117c2d2 | 1078 | if (invisible_p (var) == 0) |
726f6388 JA |
1079 | print_assignment (var); |
1080 | } | |
1081 | ||
28ef6c31 JA |
1082 | /* Print LIST (a list of shell functions) to stdout in such a way that |
1083 | they can be read back in. */ | |
1084 | void | |
a61ffa78 | 1085 | print_func_list (SHELL_VAR **list) |
28ef6c31 JA |
1086 | { |
1087 | register int i; | |
1088 | register SHELL_VAR *var; | |
1089 | ||
1090 | for (i = 0; list && (var = list[i]); i++) | |
1091 | { | |
1092 | printf ("%s ", var->name); | |
1093 | print_var_function (var); | |
1094 | printf ("\n"); | |
1095 | } | |
1096 | } | |
1097 | ||
726f6388 JA |
1098 | /* Print the value of a single SHELL_VAR. No newline is |
1099 | output, but the variable is printed in such a way that | |
1100 | it can be read back in. */ | |
1101 | void | |
a61ffa78 | 1102 | print_assignment (SHELL_VAR *var) |
726f6388 | 1103 | { |
7117c2d2 JA |
1104 | if (var_isset (var) == 0) |
1105 | return; | |
1106 | ||
1107 | if (function_p (var)) | |
726f6388 | 1108 | { |
28ef6c31 | 1109 | printf ("%s", var->name); |
726f6388 JA |
1110 | print_var_function (var); |
1111 | printf ("\n"); | |
1112 | } | |
ccc6cda3 | 1113 | #if defined (ARRAY_VARS) |
7117c2d2 | 1114 | else if (array_p (var)) |
ccc6cda3 | 1115 | print_array_assignment (var, 0); |
fdf670ea CR |
1116 | else if (assoc_p (var)) |
1117 | print_assoc_assignment (var, 0); | |
ccc6cda3 | 1118 | #endif /* ARRAY_VARS */ |
7117c2d2 | 1119 | else |
726f6388 JA |
1120 | { |
1121 | printf ("%s=", var->name); | |
ccc6cda3 | 1122 | print_var_value (var, 1); |
726f6388 JA |
1123 | printf ("\n"); |
1124 | } | |
1125 | } | |
1126 | ||
1127 | /* Print the value cell of VAR, a shell variable. Do not print | |
ccc6cda3 JA |
1128 | the name, nor leading/trailing newline. If QUOTE is non-zero, |
1129 | and the value contains shell metacharacters, quote the value | |
1130 | in such a way that it can be read back in. */ | |
726f6388 | 1131 | void |
a61ffa78 | 1132 | print_var_value (SHELL_VAR *var, int quote) |
726f6388 | 1133 | { |
ccc6cda3 JA |
1134 | char *t; |
1135 | ||
7117c2d2 JA |
1136 | if (var_isset (var) == 0) |
1137 | return; | |
1138 | ||
1139 | if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var))) | |
ccc6cda3 | 1140 | { |
7117c2d2 JA |
1141 | t = ansic_quote (value_cell (var), 0, (int *)0); |
1142 | printf ("%s", t); | |
1143 | free (t); | |
1144 | } | |
1145 | else if (quote && sh_contains_shell_metas (value_cell (var))) | |
1146 | { | |
1147 | t = sh_single_quote (value_cell (var)); | |
1148 | printf ("%s", t); | |
1149 | free (t); | |
ccc6cda3 | 1150 | } |
7117c2d2 JA |
1151 | else |
1152 | printf ("%s", value_cell (var)); | |
726f6388 JA |
1153 | } |
1154 | ||
1155 | /* Print the function cell of VAR, a shell variable. Do not | |
1156 | print the name, nor leading/trailing newline. */ | |
1157 | void | |
a61ffa78 | 1158 | print_var_function (SHELL_VAR *var) |
726f6388 | 1159 | { |
b0c16657 CR |
1160 | char *x; |
1161 | ||
7117c2d2 | 1162 | if (function_p (var) && var_isset (var)) |
b0c16657 CR |
1163 | { |
1164 | x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL); | |
1165 | printf ("%s", x); | |
1166 | } | |
726f6388 JA |
1167 | } |
1168 | ||
1169 | /* **************************************************************** */ | |
ccc6cda3 | 1170 | /* */ |
7117c2d2 | 1171 | /* Dynamic Variables */ |
ccc6cda3 | 1172 | /* */ |
726f6388 JA |
1173 | /* **************************************************************** */ |
1174 | ||
1175 | /* DYNAMIC VARIABLES | |
ccc6cda3 | 1176 | |
726f6388 JA |
1177 | These are variables whose values are generated anew each time they are |
1178 | referenced. These are implemented using a pair of function pointers | |
7117c2d2 JA |
1179 | in the struct variable: assign_func, which is called from bind_variable |
1180 | and, if arrays are compiled into the shell, some of the functions in | |
1181 | arrayfunc.c, and dynamic_value, which is called from find_variable. | |
1182 | ||
1183 | assign_func is called from bind_variable_internal, if | |
1184 | bind_variable_internal discovers that the variable being assigned to | |
1185 | has such a function. The function is called as | |
1186 | SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind) | |
726f6388 | 1187 | and the (SHELL_VAR *)temp is returned as the value of bind_variable. It |
7117c2d2 JA |
1188 | is usually ENTRY (self). IND is an index for an array variable, and |
1189 | unused otherwise. | |
ccc6cda3 | 1190 | |
7117c2d2 | 1191 | dynamic_value is called from find_variable_internal to return a `new' |
3a7c642e | 1192 | value for the specified dynamic variable. If this function is NULL, |
7117c2d2 JA |
1193 | the variable is treated as a `normal' shell variable. If it is not, |
1194 | however, then this function is called like this: | |
1195 | tempvar = (*(var->dynamic_value)) (var); | |
ccc6cda3 | 1196 | |
726f6388 JA |
1197 | Sometimes `tempvar' will replace the value of `var'. Other times, the |
1198 | shell will simply use the string value. Pretty object-oriented, huh? | |
ccc6cda3 | 1199 | |
726f6388 JA |
1200 | Be warned, though: if you `unset' a special variable, it loses its |
1201 | special meaning, even if you subsequently set it. | |
ccc6cda3 | 1202 | |
726f6388 | 1203 | The special assignment code would probably have been better put in |
7117c2d2 | 1204 | subst.c: do_assignment_internal, in the same style as |
726f6388 JA |
1205 | stupidly_hack_special_variables, but I wanted the changes as |
1206 | localized as possible. */ | |
1207 | ||
f73dda09 JA |
1208 | #define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \ |
1209 | do \ | |
1210 | { \ | |
d11b8b46 | 1211 | v = bind_variable (var, (val), 0); \ |
f73dda09 JA |
1212 | v->dynamic_value = gfunc; \ |
1213 | v->assign_func = afunc; \ | |
1214 | } \ | |
1215 | while (0) | |
1216 | ||
1217 | #define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \ | |
1218 | do \ | |
1219 | { \ | |
1220 | v = make_new_array_variable (var); \ | |
1221 | v->dynamic_value = gfunc; \ | |
1222 | v->assign_func = afunc; \ | |
1223 | } \ | |
1224 | while (0) | |
1225 | ||
fdf670ea CR |
1226 | #define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \ |
1227 | do \ | |
1228 | { \ | |
1229 | v = make_new_assoc_variable (var); \ | |
1230 | v->dynamic_value = gfunc; \ | |
1231 | v->assign_func = afunc; \ | |
1232 | } \ | |
1233 | while (0) | |
1234 | ||
bb70624e | 1235 | static SHELL_VAR * |
a61ffa78 | 1236 | null_assign (SHELL_VAR *self, char *value, arrayind_t unused, char *key) |
bb70624e JA |
1237 | { |
1238 | return (self); | |
1239 | } | |
1240 | ||
1241 | #if defined (ARRAY_VARS) | |
1242 | static SHELL_VAR * | |
a61ffa78 | 1243 | null_array_assign (SHELL_VAR *self, char *value, arrayind_t ind, char *key) |
bb70624e JA |
1244 | { |
1245 | return (self); | |
1246 | } | |
1247 | #endif | |
1248 | ||
d3a24ed2 CR |
1249 | /* Degenerate `dynamic_value' function; just returns what's passed without |
1250 | manipulation. */ | |
1251 | static SHELL_VAR * | |
a61ffa78 | 1252 | get_self (SHELL_VAR *self) |
d3a24ed2 CR |
1253 | { |
1254 | return (self); | |
1255 | } | |
1256 | ||
1257 | #if defined (ARRAY_VARS) | |
39feef01 | 1258 | /* A generic dynamic array variable initializer. Initialize array variable |
d3a24ed2 CR |
1259 | NAME with dynamic value function GETFUNC and assignment function SETFUNC. */ |
1260 | static SHELL_VAR * | |
a61ffa78 | 1261 | init_dynamic_array_var (char *name, sh_var_value_func_t *getfunc, sh_var_assign_func_t *setfunc, int attrs) |
d3a24ed2 CR |
1262 | { |
1263 | SHELL_VAR *v; | |
1264 | ||
1265 | v = find_variable (name); | |
1266 | if (v) | |
1267 | return (v); | |
1268 | INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc); | |
1269 | if (attrs) | |
1270 | VSETATTR (v, attrs); | |
1271 | return v; | |
1272 | } | |
d3a24ed2 | 1273 | |
fdf670ea | 1274 | static SHELL_VAR * |
a61ffa78 | 1275 | init_dynamic_assoc_var (char *name, sh_var_value_func_t *getfunc, sh_var_assign_func_t *setfunc, int attrs) |
fdf670ea CR |
1276 | { |
1277 | SHELL_VAR *v; | |
1278 | ||
1279 | v = find_variable (name); | |
1280 | if (v) | |
1281 | return (v); | |
1282 | INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc); | |
1283 | if (attrs) | |
1284 | VSETATTR (v, attrs); | |
1285 | return v; | |
1286 | } | |
1287 | #endif | |
d3a24ed2 | 1288 | |
567c0bc2 CR |
1289 | /* Set the string value of VAR to the string representation of VALUE. |
1290 | Right now this takes an INTMAX_T because that's what itos needs. If | |
1291 | FLAGS&1, we force the integer attribute on. */ | |
1292 | static inline SHELL_VAR * | |
1293 | set_int_value (SHELL_VAR *var, intmax_t value, int flags) | |
1294 | { | |
1295 | char *p; | |
1296 | ||
1297 | p = itos (value); | |
1298 | FREE (value_cell (var)); | |
1299 | var_setvalue (var, p); | |
1300 | if (flags & 1) | |
1301 | VSETATTR (var, att_integer); | |
1302 | return (var); | |
1303 | } | |
1304 | ||
1305 | static inline SHELL_VAR * | |
1306 | set_string_value (SHELL_VAR *var, const char *value, int flags) | |
1307 | { | |
1308 | char *p; | |
1309 | ||
1310 | if (value && *value) | |
1311 | p = savestring (value); | |
1312 | else | |
1313 | { | |
1314 | p = (char *)xmalloc (1); | |
1315 | p[0] = '\0'; | |
1316 | } | |
1317 | FREE (value_cell (var)); | |
1318 | var_setvalue (var, p); | |
1319 | return (var); | |
1320 | } | |
1321 | ||
726f6388 JA |
1322 | /* The value of $SECONDS. This is the number of seconds since shell |
1323 | invocation, or, the number of seconds since the last assignment + the | |
1324 | value of the last assignment. */ | |
7117c2d2 | 1325 | static intmax_t seconds_value_assigned; |
726f6388 JA |
1326 | |
1327 | static SHELL_VAR * | |
a61ffa78 | 1328 | assign_seconds (SHELL_VAR *self, char *value, arrayind_t unused, char *key) |
726f6388 | 1329 | { |
e34adc2c CR |
1330 | intmax_t nval; |
1331 | int expok; | |
1332 | ||
1333 | if (integer_p (self)) | |
1334 | nval = evalexp (value, 0, &expok); | |
1335 | else | |
1336 | expok = legal_number (value, &nval); | |
1337 | seconds_value_assigned = expok ? nval : 0; | |
32ba27b4 CR |
1338 | gettimeofday (&shellstart, NULL); |
1339 | shell_start_time = shellstart.tv_sec; | |
567c0bc2 | 1340 | return (set_int_value (self, nval, integer_p (self) != 0)); |
726f6388 JA |
1341 | } |
1342 | ||
1343 | static SHELL_VAR * | |
a61ffa78 | 1344 | get_seconds (SHELL_VAR *var) |
726f6388 JA |
1345 | { |
1346 | time_t time_since_start; | |
f7ec6b1a | 1347 | struct timeval tv; |
726f6388 | 1348 | |
f7ec6b1a CR |
1349 | gettimeofday(&tv, NULL); |
1350 | time_since_start = tv.tv_sec - shell_start_time; | |
567c0bc2 | 1351 | return (set_int_value (var, seconds_value_assigned + time_since_start, 1)); |
726f6388 JA |
1352 | } |
1353 | ||
f73dda09 | 1354 | static SHELL_VAR * |
a61ffa78 | 1355 | init_seconds_var (void) |
f73dda09 JA |
1356 | { |
1357 | SHELL_VAR *v; | |
1358 | ||
1359 | v = find_variable ("SECONDS"); | |
1360 | if (v) | |
1361 | { | |
1362 | if (legal_number (value_cell(v), &seconds_value_assigned) == 0) | |
1363 | seconds_value_assigned = 0; | |
1364 | } | |
7117c2d2 | 1365 | INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds); |
f73dda09 JA |
1366 | return v; |
1367 | } | |
376c9fe5 | 1368 | |
fc29a024 CR |
1369 | /* Functions for BASH_MONOSECONDS */ |
1370 | static SHELL_VAR * | |
1371 | get_monoseconds (SHELL_VAR *self) | |
1372 | { | |
1373 | int ret; | |
1374 | intmax_t nval; | |
1375 | struct timeval tv; | |
1376 | ||
1377 | #if defined (HAVE_CLOCK_GETTIME) && defined (CLOCK_MONOTONIC) | |
1378 | struct timespec ts; | |
1379 | ||
1380 | ret = clock_gettime (CLOCK_MONOTONIC, &ts); | |
1381 | if (ret == 0) | |
1382 | { | |
1383 | nval = ts.tv_sec; | |
1384 | return (set_int_value (self, nval, integer_p (self) != 0)); | |
1385 | } | |
1386 | #endif | |
1387 | ||
1388 | /* Fall back to gettimeofday if clock_gettime not available or fails */ | |
1389 | ret = gettimeofday (&tv, NULL); | |
1390 | nval = tv.tv_sec; | |
1391 | return (set_int_value (self, nval, integer_p (self) != 0)); | |
1392 | } | |
1393 | ||
37adc8b9 | 1394 | /* Functions for $RANDOM and $SRANDOM */ |
e76c7327 | 1395 | |
37adc8b9 CR |
1396 | int last_random_value; |
1397 | static int seeded_subshell = 0; | |
35bb237e | 1398 | |
726f6388 | 1399 | static SHELL_VAR * |
a61ffa78 | 1400 | assign_random (SHELL_VAR *self, char *value, arrayind_t unused, char *key) |
726f6388 | 1401 | { |
e34adc2c CR |
1402 | intmax_t seedval; |
1403 | int expok; | |
1404 | ||
1405 | if (integer_p (self)) | |
1406 | seedval = evalexp (value, 0, &expok); | |
1407 | else | |
1408 | expok = legal_number (value, &seedval); | |
1409 | if (expok == 0) | |
1410 | return (self); | |
1411 | sbrand (seedval); | |
227f982e | 1412 | if (subshell_environment) |
97c2aab2 | 1413 | seeded_subshell = getpid (); |
567c0bc2 | 1414 | return (set_int_value (self, seedval, integer_p (self) != 0)); |
726f6388 JA |
1415 | } |
1416 | ||
28ef6c31 | 1417 | int |
a61ffa78 | 1418 | get_random_number (void) |
726f6388 | 1419 | { |
97c2aab2 | 1420 | int rv, pid; |
726f6388 | 1421 | |
ccc6cda3 | 1422 | /* Reset for command and process substitution. */ |
97c2aab2 CR |
1423 | pid = getpid (); |
1424 | if (subshell_environment && seeded_subshell != pid) | |
227f982e | 1425 | { |
35bb237e | 1426 | seedrand (); |
97c2aab2 | 1427 | seeded_subshell = pid; |
227f982e | 1428 | } |
ccc6cda3 JA |
1429 | |
1430 | do | |
1431 | rv = brand (); | |
f73dda09 | 1432 | while (rv == last_random_value); |
376c9fe5 CR |
1433 | |
1434 | return (last_random_value = rv); | |
28ef6c31 | 1435 | } |
ccc6cda3 | 1436 | |
28ef6c31 | 1437 | static SHELL_VAR * |
a61ffa78 | 1438 | get_random (SHELL_VAR *var) |
28ef6c31 JA |
1439 | { |
1440 | int rv; | |
28ef6c31 JA |
1441 | |
1442 | rv = get_random_number (); | |
567c0bc2 | 1443 | return (set_int_value (var, rv, 1)); |
376c9fe5 CR |
1444 | } |
1445 | ||
1446 | static SHELL_VAR * | |
a61ffa78 | 1447 | get_urandom (SHELL_VAR *var) |
376c9fe5 CR |
1448 | { |
1449 | u_bits32_t rv; | |
376c9fe5 CR |
1450 | |
1451 | rv = get_urandom32 (); | |
567c0bc2 | 1452 | return (set_int_value (var, rv, 1)); |
726f6388 JA |
1453 | } |
1454 | ||
7117c2d2 | 1455 | static SHELL_VAR * |
a61ffa78 | 1456 | assign_lineno (SHELL_VAR *var, char *value, arrayind_t unused, char *key) |
7117c2d2 JA |
1457 | { |
1458 | intmax_t new_value; | |
1459 | ||
1460 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1461 | new_value = 0; | |
048b249e | 1462 | line_number = line_number_base = new_value; |
b2b78a63 | 1463 | return (set_int_value (var, line_number, integer_p (var) != 0)); |
7117c2d2 JA |
1464 | } |
1465 | ||
726f6388 JA |
1466 | /* Function which returns the current line number. */ |
1467 | static SHELL_VAR * | |
a61ffa78 | 1468 | get_lineno (SHELL_VAR *var) |
726f6388 | 1469 | { |
ccc6cda3 | 1470 | int ln; |
726f6388 | 1471 | |
ccc6cda3 | 1472 | ln = executing_line_number (); |
567c0bc2 | 1473 | return (set_int_value (var, ln, 0)); |
726f6388 JA |
1474 | } |
1475 | ||
d3a24ed2 | 1476 | static SHELL_VAR * |
a61ffa78 | 1477 | assign_subshell (SHELL_VAR *var, char *value, arrayind_t unused, char *key) |
d3a24ed2 CR |
1478 | { |
1479 | intmax_t new_value; | |
1480 | ||
1481 | if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0) | |
1482 | new_value = 0; | |
1483 | subshell_level = new_value; | |
1484 | return var; | |
1485 | } | |
1486 | ||
1487 | static SHELL_VAR * | |
a61ffa78 | 1488 | get_subshell (SHELL_VAR *var) |
d3a24ed2 | 1489 | { |
567c0bc2 | 1490 | return (set_int_value (var, subshell_level, 0)); |
d3a24ed2 CR |
1491 | } |
1492 | ||
553a7d66 | 1493 | static SHELL_VAR * |
a61ffa78 | 1494 | get_epochseconds (SHELL_VAR *var) |
553a7d66 CR |
1495 | { |
1496 | intmax_t now; | |
553a7d66 CR |
1497 | |
1498 | now = NOW; | |
567c0bc2 | 1499 | return (set_int_value (var, now, 0)); |
553a7d66 CR |
1500 | } |
1501 | ||
1502 | static SHELL_VAR * | |
a61ffa78 | 1503 | get_epochrealtime (SHELL_VAR *var) |
553a7d66 CR |
1504 | { |
1505 | char buf[32]; | |
553a7d66 CR |
1506 | struct timeval tv; |
1507 | ||
1508 | gettimeofday (&tv, NULL); | |
1509 | snprintf (buf, sizeof (buf), "%u%c%06u", (unsigned)tv.tv_sec, | |
1510 | locale_decpoint (), | |
1511 | (unsigned)tv.tv_usec); | |
1512 | ||
567c0bc2 | 1513 | return (set_string_value (var, buf, 0)); |
553a7d66 CR |
1514 | } |
1515 | ||
d3ad40de | 1516 | static SHELL_VAR * |
a61ffa78 | 1517 | get_bashpid (SHELL_VAR *var) |
d3ad40de CR |
1518 | { |
1519 | int pid; | |
d3ad40de CR |
1520 | |
1521 | pid = getpid (); | |
567c0bc2 | 1522 | return (set_int_value (var, pid, 1)); |
d3ad40de CR |
1523 | } |
1524 | ||
553a7d66 | 1525 | static SHELL_VAR * |
a61ffa78 | 1526 | get_bash_argv0 (SHELL_VAR *var) |
553a7d66 | 1527 | { |
567c0bc2 | 1528 | return (set_string_value (var, dollar_vars[0], 0)); |
553a7d66 CR |
1529 | } |
1530 | ||
216e2e9b CR |
1531 | static char *static_shell_name = 0; |
1532 | ||
553a7d66 | 1533 | static SHELL_VAR * |
a61ffa78 | 1534 | assign_bash_argv0 (SHELL_VAR *var, char *value, arrayind_t unused, char *key) |
553a7d66 | 1535 | { |
216e2e9b CR |
1536 | size_t vlen; |
1537 | ||
1538 | if (value == 0) | |
1539 | return var; | |
1540 | ||
553a7d66 CR |
1541 | FREE (dollar_vars[0]); |
1542 | dollar_vars[0] = savestring (value); | |
216e2e9b CR |
1543 | |
1544 | /* Need these gyrations because shell_name isn't dynamically allocated */ | |
1545 | vlen = STRLEN (value); | |
1546 | static_shell_name = xrealloc (static_shell_name, vlen + 1); | |
1547 | strcpy (static_shell_name, value); | |
1548 | ||
1549 | shell_name = static_shell_name; | |
553a7d66 CR |
1550 | return var; |
1551 | } | |
f6029107 CR |
1552 | |
1553 | static void | |
a61ffa78 | 1554 | set_argv0 (void) |
f6029107 CR |
1555 | { |
1556 | SHELL_VAR *v; | |
1557 | ||
1558 | v = find_variable ("BASH_ARGV0"); | |
1559 | if (v && imported_p (v)) | |
1560 | assign_bash_argv0 (v, value_cell (v), 0, 0); | |
1561 | } | |
553a7d66 | 1562 | |
d3a24ed2 | 1563 | static SHELL_VAR * |
a61ffa78 | 1564 | get_bash_command (SHELL_VAR *var) |
d3a24ed2 CR |
1565 | { |
1566 | char *p; | |
fdf670ea | 1567 | |
567c0bc2 CR |
1568 | p = the_printed_command_except_trap ? the_printed_command_except_trap : ""; |
1569 | return (set_string_value (var, p, 0)); | |
d3a24ed2 CR |
1570 | } |
1571 | ||
726f6388 JA |
1572 | #if defined (HISTORY) |
1573 | static SHELL_VAR * | |
a61ffa78 | 1574 | get_histcmd (SHELL_VAR *var) |
726f6388 | 1575 | { |
9c10def1 CR |
1576 | int n; |
1577 | ||
1578 | /* Do the same adjustment here we do in parse.y:prompt_history_number, | |
1579 | assuming that we are in one of two states: decoding this as part of | |
1580 | the prompt string, in which case we do not want to assume that the | |
1581 | command has been saved to the history and the history number incremented, | |
1582 | or the expansion is part of the current command being executed and has | |
1583 | already been saved to history and the history number incremented. | |
1584 | Right now we use EXECUTING as the determinant. */ | |
1585 | n = history_number () - executing; | |
567c0bc2 | 1586 | return (set_int_value (var, n, 0)); |
726f6388 JA |
1587 | } |
1588 | #endif | |
1589 | ||
d3a24ed2 CR |
1590 | #if defined (READLINE) |
1591 | /* When this function returns, VAR->value points to malloced memory. */ | |
1592 | static SHELL_VAR * | |
a61ffa78 | 1593 | get_comp_wordbreaks (SHELL_VAR *var) |
d3a24ed2 | 1594 | { |
d3a24ed2 CR |
1595 | /* If we don't have anything yet, assign a default value. */ |
1596 | if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0) | |
1597 | enable_hostname_completion (perform_hostname_completion); | |
1598 | ||
567c0bc2 | 1599 | return (set_string_value (var, rl_completer_word_break_characters, 0)); |
d3a24ed2 CR |
1600 | } |
1601 | ||
1602 | /* When this function returns, rl_completer_word_break_characters points to | |
1603 | malloced memory. */ | |
1604 | static SHELL_VAR * | |
a61ffa78 | 1605 | assign_comp_wordbreaks (SHELL_VAR *self, char *value, arrayind_t unused, char *key) |
d3a24ed2 CR |
1606 | { |
1607 | if (rl_completer_word_break_characters && | |
1608 | rl_completer_word_break_characters != rl_basic_word_break_characters) | |
2adf06d9 | 1609 | free ((void *)rl_completer_word_break_characters); |
d3a24ed2 CR |
1610 | |
1611 | rl_completer_word_break_characters = savestring (value); | |
1612 | return self; | |
1613 | } | |
1614 | #endif /* READLINE */ | |
1615 | ||
ccc6cda3 | 1616 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
d3a24ed2 | 1617 | static SHELL_VAR * |
a61ffa78 | 1618 | assign_dirstack (SHELL_VAR *self, char *value, arrayind_t ind, char *key) |
7117c2d2 JA |
1619 | { |
1620 | set_dirstack_element (ind, 1, value); | |
1621 | return self; | |
1622 | } | |
1623 | ||
ccc6cda3 | 1624 | static SHELL_VAR * |
a61ffa78 | 1625 | get_dirstack (SHELL_VAR *self) |
ccc6cda3 JA |
1626 | { |
1627 | ARRAY *a; | |
1628 | WORD_LIST *l; | |
1629 | ||
74d9692b | 1630 | l = get_directory_stack (0); |
7117c2d2 JA |
1631 | a = array_from_word_list (l); |
1632 | array_dispose (array_cell (self)); | |
d166f048 | 1633 | dispose_words (l); |
7117c2d2 | 1634 | var_setarray (self, a); |
ccc6cda3 JA |
1635 | return self; |
1636 | } | |
1637 | #endif /* PUSHD AND POPD && ARRAY_VARS */ | |
1638 | ||
d166f048 JA |
1639 | #if defined (ARRAY_VARS) |
1640 | /* We don't want to initialize the group set with a call to getgroups() | |
1641 | unless we're asked to, but we only want to do it once. */ | |
1642 | static SHELL_VAR * | |
a61ffa78 | 1643 | get_groupset (SHELL_VAR *self) |
d166f048 JA |
1644 | { |
1645 | register int i; | |
1646 | int ng; | |
1647 | ARRAY *a; | |
1648 | static char **group_set = (char **)NULL; | |
1649 | ||
1650 | if (group_set == 0) | |
1651 | { | |
1652 | group_set = get_group_list (&ng); | |
1653 | a = array_cell (self); | |
1654 | for (i = 0; i < ng; i++) | |
7117c2d2 | 1655 | array_insert (a, i, group_set[i]); |
d166f048 JA |
1656 | } |
1657 | return (self); | |
1658 | } | |
fdf670ea | 1659 | |
c181950a CR |
1660 | # if defined (DEBUGGER) |
1661 | static SHELL_VAR * | |
a61ffa78 | 1662 | get_bashargcv (SHELL_VAR *self) |
c181950a CR |
1663 | { |
1664 | static int self_semaphore = 0; | |
1665 | ||
1666 | /* Backwards compatibility: if we refer to BASH_ARGV or BASH_ARGC at the | |
1667 | top level without enabling debug mode, and we don't have an instance | |
1668 | of the variable set, initialize the arg arrays. | |
1669 | This will already have been done if debugging_mode != 0. */ | |
1670 | if (self_semaphore == 0 && variable_context == 0 && debugging_mode == 0) /* don't do it for shell functions */ | |
1671 | { | |
1672 | self_semaphore = 1; | |
1673 | init_bash_argv (); | |
1674 | self_semaphore = 0; | |
1675 | } | |
1676 | return self; | |
1677 | } | |
1678 | # endif | |
1679 | ||
fdf670ea | 1680 | static SHELL_VAR * |
a61ffa78 | 1681 | build_hashcmd (SHELL_VAR *self) |
fdf670ea CR |
1682 | { |
1683 | HASH_TABLE *h; | |
1684 | int i; | |
1685 | char *k, *v; | |
1686 | BUCKET_CONTENTS *item; | |
1687 | ||
1688 | h = assoc_cell (self); | |
1689 | if (h) | |
1690 | assoc_dispose (h); | |
1691 | ||
1692 | if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0) | |
1693 | { | |
1694 | var_setvalue (self, (char *)NULL); | |
1695 | return self; | |
1696 | } | |
1697 | ||
1698 | h = assoc_create (hashed_filenames->nbuckets); | |
1699 | for (i = 0; i < hashed_filenames->nbuckets; i++) | |
1700 | { | |
1701 | for (item = hash_items (i, hashed_filenames); item; item = item->next) | |
1702 | { | |
1703 | k = savestring (item->key); | |
1704 | v = pathdata(item)->path; | |
1705 | assoc_insert (h, k, v); | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | var_setvalue (self, (char *)h); | |
1710 | return self; | |
1711 | } | |
1712 | ||
1713 | static SHELL_VAR * | |
a61ffa78 | 1714 | get_hashcmd (SHELL_VAR *self) |
fdf670ea CR |
1715 | { |
1716 | build_hashcmd (self); | |
1717 | return (self); | |
1718 | } | |
1719 | ||
1720 | static SHELL_VAR * | |
a61ffa78 | 1721 | assign_hashcmd (SHELL_VAR *self, char *value, arrayind_t ind, char *key) |
fdf670ea | 1722 | { |
ccb4014f | 1723 | #if defined (RESTRICTED_SHELL) |
2e412574 CR |
1724 | char *full_path; |
1725 | ||
1726 | if (restricted) | |
ccb4014f | 1727 | { |
2e412574 CR |
1728 | if (strchr (value, '/')) |
1729 | { | |
1730 | sh_restricted (value); | |
1731 | return (SHELL_VAR *)NULL; | |
1732 | } | |
1733 | /* If we are changing the hash table in a restricted shell, make sure the | |
1734 | target pathname can be found using a $PATH search. */ | |
1735 | full_path = find_user_command (value); | |
1736 | if (full_path == 0 || *full_path == 0 || executable_file (full_path) == 0) | |
1737 | { | |
1738 | sh_notfound (value); | |
1739 | free (full_path); | |
1740 | return ((SHELL_VAR *)NULL); | |
1741 | } | |
1742 | free (full_path); | |
ccb4014f CR |
1743 | } |
1744 | #endif | |
fdf670ea CR |
1745 | phash_insert (key, value, 0, 0); |
1746 | return (build_hashcmd (self)); | |
1747 | } | |
1748 | ||
2c471a92 | 1749 | #if defined (ALIAS) |
fdf670ea | 1750 | static SHELL_VAR * |
a61ffa78 | 1751 | build_aliasvar (SHELL_VAR *self) |
fdf670ea CR |
1752 | { |
1753 | HASH_TABLE *h; | |
1754 | int i; | |
1755 | char *k, *v; | |
1756 | BUCKET_CONTENTS *item; | |
1757 | ||
1758 | h = assoc_cell (self); | |
1759 | if (h) | |
1760 | assoc_dispose (h); | |
1761 | ||
1762 | if (aliases == 0 || HASH_ENTRIES (aliases) == 0) | |
1763 | { | |
1764 | var_setvalue (self, (char *)NULL); | |
1765 | return self; | |
1766 | } | |
1767 | ||
1768 | h = assoc_create (aliases->nbuckets); | |
1769 | for (i = 0; i < aliases->nbuckets; i++) | |
1770 | { | |
1771 | for (item = hash_items (i, aliases); item; item = item->next) | |
1772 | { | |
1773 | k = savestring (item->key); | |
1774 | v = ((alias_t *)(item->data))->value; | |
1775 | assoc_insert (h, k, v); | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | var_setvalue (self, (char *)h); | |
1780 | return self; | |
1781 | } | |
1782 | ||
1783 | static SHELL_VAR * | |
a61ffa78 | 1784 | get_aliasvar (SHELL_VAR *self) |
fdf670ea CR |
1785 | { |
1786 | build_aliasvar (self); | |
1787 | return (self); | |
1788 | } | |
1789 | ||
1790 | static SHELL_VAR * | |
a61ffa78 | 1791 | assign_aliasvar (SHELL_VAR *self, char *value, arrayind_t ind, char *key) |
fdf670ea | 1792 | { |
5c5c7523 CR |
1793 | if (legal_alias_name (key, 0) == 0) |
1794 | { | |
1795 | report_error (_("`%s': invalid alias name"), key); | |
1796 | return (self); | |
1797 | } | |
fdf670ea CR |
1798 | add_alias (key, value); |
1799 | return (build_aliasvar (self)); | |
1800 | } | |
2c471a92 CR |
1801 | #endif /* ALIAS */ |
1802 | ||
d166f048 | 1803 | #endif /* ARRAY_VARS */ |
bb70624e | 1804 | |
d3a24ed2 CR |
1805 | /* If ARRAY_VARS is not defined, this just returns the name of any |
1806 | currently-executing function. If we have arrays, it's a call stack. */ | |
bb70624e | 1807 | static SHELL_VAR * |
a61ffa78 | 1808 | get_funcname (SHELL_VAR *self) |
bb70624e | 1809 | { |
d3a24ed2 | 1810 | #if ! defined (ARRAY_VARS) |
bb70624e | 1811 | if (variable_context && this_shell_function) |
567c0bc2 | 1812 | return (set_string_value (self, this_shell_function->name, 0)); |
d3a24ed2 | 1813 | #endif |
bb70624e JA |
1814 | return (self); |
1815 | } | |
1816 | ||
1817 | void | |
a61ffa78 | 1818 | make_funcname_visible (int on_or_off) |
726f6388 JA |
1819 | { |
1820 | SHELL_VAR *v; | |
1821 | ||
bb70624e JA |
1822 | v = find_variable ("FUNCNAME"); |
1823 | if (v == 0 || v->dynamic_value == 0) | |
1824 | return; | |
1825 | ||
1826 | if (on_or_off) | |
1827 | VUNSETATTR (v, att_invisible); | |
1828 | else | |
1829 | VSETATTR (v, att_invisible); | |
1830 | } | |
1831 | ||
f73dda09 | 1832 | static SHELL_VAR * |
a61ffa78 | 1833 | init_funcname_var (void) |
f73dda09 JA |
1834 | { |
1835 | SHELL_VAR *v; | |
bb70624e | 1836 | |
f73dda09 JA |
1837 | v = find_variable ("FUNCNAME"); |
1838 | if (v) | |
1839 | return v; | |
d3a24ed2 CR |
1840 | #if defined (ARRAY_VARS) |
1841 | INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign); | |
1842 | #else | |
f73dda09 | 1843 | INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign); |
d3a24ed2 | 1844 | #endif |
f73dda09 JA |
1845 | VSETATTR (v, att_invisible|att_noassign); |
1846 | return v; | |
1847 | } | |
726f6388 | 1848 | |
bb70624e | 1849 | static void |
a61ffa78 | 1850 | initialize_dynamic_variables (void) |
bb70624e JA |
1851 | { |
1852 | SHELL_VAR *v; | |
726f6388 | 1853 | |
f73dda09 JA |
1854 | v = init_seconds_var (); |
1855 | ||
553a7d66 CR |
1856 | INIT_DYNAMIC_VAR ("BASH_ARGV0", (char *)NULL, get_bash_argv0, assign_bash_argv0); |
1857 | ||
d3a24ed2 CR |
1858 | INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL); |
1859 | INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell); | |
1860 | ||
fc29a024 CR |
1861 | INIT_DYNAMIC_VAR ("BASH_MONOSECONDS", (char *)NULL, get_monoseconds, (sh_var_assign_func_t *)NULL); |
1862 | ||
bb70624e | 1863 | INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random); |
6e70dbff | 1864 | VSETATTR (v, att_integer); |
52e46969 | 1865 | INIT_DYNAMIC_VAR ("SRANDOM", (char *)NULL, get_urandom, (sh_var_assign_func_t *)NULL); |
376c9fe5 | 1866 | VSETATTR (v, att_integer); |
bb70624e | 1867 | INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno); |
96a2ec12 | 1868 | VSETATTR (v, att_regenerate); |
726f6388 | 1869 | |
d3ad40de | 1870 | INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign); |
628bb7b7 | 1871 | VSETATTR (v, att_integer); |
d3ad40de | 1872 | |
553a7d66 | 1873 | INIT_DYNAMIC_VAR ("EPOCHSECONDS", (char *)NULL, get_epochseconds, null_assign); |
b90cb5a2 | 1874 | VSETATTR (v, att_regenerate); |
553a7d66 | 1875 | INIT_DYNAMIC_VAR ("EPOCHREALTIME", (char *)NULL, get_epochrealtime, null_assign); |
b90cb5a2 | 1876 | VSETATTR (v, att_regenerate); |
553a7d66 | 1877 | |
726f6388 | 1878 | #if defined (HISTORY) |
7117c2d2 | 1879 | INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL); |
6e70dbff | 1880 | VSETATTR (v, att_integer); |
726f6388 | 1881 | #endif |
ccc6cda3 | 1882 | |
d3a24ed2 CR |
1883 | #if defined (READLINE) |
1884 | INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks); | |
1885 | #endif | |
1886 | ||
ccc6cda3 | 1887 | #if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS) |
d3a24ed2 | 1888 | v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0); |
ccc6cda3 | 1889 | #endif /* PUSHD_AND_POPD && ARRAY_VARS */ |
d166f048 JA |
1890 | |
1891 | #if defined (ARRAY_VARS) | |
d3a24ed2 CR |
1892 | v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign); |
1893 | ||
1894 | # if defined (DEBUGGER) | |
c181950a CR |
1895 | v = init_dynamic_array_var ("BASH_ARGC", get_bashargcv, null_array_assign, att_noassign|att_nounset); |
1896 | v = init_dynamic_array_var ("BASH_ARGV", get_bashargcv, null_array_assign, att_noassign|att_nounset); | |
d3a24ed2 | 1897 | # endif /* DEBUGGER */ |
b66cc816 CR |
1898 | v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset); |
1899 | v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset); | |
fdf670ea CR |
1900 | |
1901 | v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree); | |
2c471a92 | 1902 | # if defined (ALIAS) |
fdf670ea | 1903 | v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree); |
2c471a92 | 1904 | # endif |
d166f048 | 1905 | #endif |
bb70624e | 1906 | |
f73dda09 | 1907 | v = init_funcname_var (); |
726f6388 JA |
1908 | } |
1909 | ||
7117c2d2 JA |
1910 | /* **************************************************************** */ |
1911 | /* */ | |
1912 | /* Retrieving variables and values */ | |
1913 | /* */ | |
1914 | /* **************************************************************** */ | |
1915 | ||
6dc203b8 CR |
1916 | #if 0 /* not yet */ |
1917 | int | |
a61ffa78 | 1918 | var_isset (SHELL_VAR *var) |
6dc203b8 CR |
1919 | { |
1920 | return (var->value != 0); | |
1921 | } | |
1922 | ||
1923 | int | |
a61ffa78 | 1924 | var_isunset (SHELL_VAR *var) |
6dc203b8 CR |
1925 | { |
1926 | return (var->value == 0); | |
1927 | } | |
1928 | #endif | |
1929 | ||
726f6388 JA |
1930 | /* How to get a pointer to the shell variable or function named NAME. |
1931 | HASHED_VARS is a pointer to the hash table containing the list | |
1932 | of interest (either variables or functions). */ | |
7117c2d2 JA |
1933 | |
1934 | static SHELL_VAR * | |
a61ffa78 | 1935 | hash_lookup (const char *name, HASH_TABLE *hashed_vars) |
726f6388 JA |
1936 | { |
1937 | BUCKET_CONTENTS *bucket; | |
1938 | ||
7117c2d2 | 1939 | bucket = hash_search (name, hashed_vars, 0); |
21af69d5 CR |
1940 | /* If we find the name in HASHED_VARS, set LAST_TABLE_SEARCHED to that |
1941 | table. */ | |
1942 | if (bucket) | |
1943 | last_table_searched = hashed_vars; | |
ccc6cda3 | 1944 | return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL); |
726f6388 JA |
1945 | } |
1946 | ||
7117c2d2 | 1947 | SHELL_VAR * |
a61ffa78 | 1948 | var_lookup (const char *name, VAR_CONTEXT *vcontext) |
7117c2d2 JA |
1949 | { |
1950 | VAR_CONTEXT *vc; | |
1951 | SHELL_VAR *v; | |
1952 | ||
1953 | v = (SHELL_VAR *)NULL; | |
1954 | for (vc = vcontext; vc; vc = vc->down) | |
1955 | if (v = hash_lookup (name, vc->table)) | |
1956 | break; | |
1957 | ||
1958 | return v; | |
1959 | } | |
1960 | ||
726f6388 | 1961 | /* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero, |
7117c2d2 JA |
1962 | then also search the temporarily built list of exported variables. |
1963 | The lookup order is: | |
1964 | temporary_env | |
fdf670ea | 1965 | shell_variables list |
7117c2d2 JA |
1966 | */ |
1967 | ||
726f6388 | 1968 | SHELL_VAR * |
a61ffa78 | 1969 | find_variable_internal (const char *name, int flags) |
726f6388 | 1970 | { |
28ef6c31 | 1971 | SHELL_VAR *var; |
fe570ea1 | 1972 | int search_tempenv, force_tempenv; |
1a81420a | 1973 | VAR_CONTEXT *vc; |
28ef6c31 JA |
1974 | |
1975 | var = (SHELL_VAR *)NULL; | |
726f6388 | 1976 | |
fe570ea1 CR |
1977 | force_tempenv = (flags & FV_FORCETEMPENV); |
1978 | ||
726f6388 JA |
1979 | /* If explicitly requested, first look in the temporary environment for |
1980 | the variable. This allows constructs such as "foo=x eval 'echo $foo'" | |
1981 | to get the `exported' value of $foo. This happens if we are executing | |
1982 | a function or builtin, or if we are looking up a variable in a | |
1983 | "subshell environment". */ | |
d3a24ed2 CR |
1984 | search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment); |
1985 | ||
1986 | if (search_tempenv && temporary_env) | |
7117c2d2 | 1987 | var = hash_lookup (name, temporary_env); |
726f6388 | 1988 | |
7117c2d2 | 1989 | if (var == 0) |
fe570ea1 CR |
1990 | { |
1991 | if ((flags & FV_SKIPINVISIBLE) == 0) | |
1992 | var = var_lookup (name, shell_variables); | |
1993 | else | |
1994 | { | |
1995 | /* essentially var_lookup expanded inline so we can check for | |
1996 | att_invisible */ | |
1997 | for (vc = shell_variables; vc; vc = vc->down) | |
1998 | { | |
1999 | var = hash_lookup (name, vc->table); | |
2000 | if (var && invisible_p (var)) | |
2001 | var = 0; | |
2002 | if (var) | |
2003 | break; | |
2004 | } | |
2005 | } | |
2006 | } | |
726f6388 | 2007 | |
7117c2d2 | 2008 | if (var == 0) |
726f6388 JA |
2009 | return ((SHELL_VAR *)NULL); |
2010 | ||
ccc6cda3 | 2011 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); |
726f6388 JA |
2012 | } |
2013 | ||
d42cb8c1 CR |
2014 | /* Look up and resolve the chain of nameref variables starting at V all the |
2015 | way to NULL or non-nameref. */ | |
2016 | SHELL_VAR * | |
a61ffa78 | 2017 | find_variable_nameref (SHELL_VAR *v) |
d42cb8c1 | 2018 | { |
fe570ea1 | 2019 | int level, flags; |
2e412574 | 2020 | char *newname; |
2c511d38 | 2021 | SHELL_VAR *orig, *oldv; |
d42cb8c1 CR |
2022 | |
2023 | level = 0; | |
2c511d38 | 2024 | orig = v; |
d42cb8c1 CR |
2025 | while (v && nameref_p (v)) |
2026 | { | |
2027 | level++; | |
2028 | if (level > NAMEREF_MAX) | |
e8652353 | 2029 | return (&nameref_maxloop_value); |
d42cb8c1 CR |
2030 | newname = nameref_cell (v); |
2031 | if (newname == 0 || *newname == '\0') | |
2032 | return ((SHELL_VAR *)0); | |
2c511d38 | 2033 | oldv = v; |
fe570ea1 CR |
2034 | flags = 0; |
2035 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2036 | flags |= FV_FORCETEMPENV; | |
bddda3d2 | 2037 | /* We don't handle array subscripts here. */ |
fe570ea1 | 2038 | v = find_variable_internal (newname, flags); |
2c511d38 CR |
2039 | if (v == orig || v == oldv) |
2040 | { | |
2041 | internal_warning (_("%s: circular name reference"), orig->name); | |
ec157dfe | 2042 | #if 1 |
c87bb0a8 | 2043 | /* XXX - provisional change - circular refs go to |
ec157dfe CR |
2044 | global scope for resolution, without namerefs. */ |
2045 | if (variable_context && v->context) | |
2046 | return (find_global_variable_noref (v->name)); | |
2047 | else | |
2048 | #endif | |
2c511d38 CR |
2049 | return ((SHELL_VAR *)0); |
2050 | } | |
d42cb8c1 CR |
2051 | } |
2052 | return v; | |
2053 | } | |
2054 | ||
2055 | /* Resolve the chain of nameref variables for NAME. XXX - could change later */ | |
2056 | SHELL_VAR * | |
a61ffa78 | 2057 | find_variable_last_nameref (const char *name, int vflags) |
d42cb8c1 CR |
2058 | { |
2059 | SHELL_VAR *v, *nv; | |
2060 | char *newname; | |
fe570ea1 | 2061 | int level, flags; |
d42cb8c1 CR |
2062 | |
2063 | nv = v = find_variable_noref (name); | |
2064 | level = 0; | |
2065 | while (v && nameref_p (v)) | |
2066 | { | |
2067 | level++; | |
2068 | if (level > NAMEREF_MAX) | |
2069 | return ((SHELL_VAR *)0); /* error message here? */ | |
2070 | newname = nameref_cell (v); | |
2071 | if (newname == 0 || *newname == '\0') | |
814e1ff5 | 2072 | return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0); |
d42cb8c1 | 2073 | nv = v; |
fe570ea1 CR |
2074 | flags = 0; |
2075 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2076 | flags |= FV_FORCETEMPENV; | |
bddda3d2 | 2077 | /* We don't accommodate array subscripts here. */ |
fe570ea1 | 2078 | v = find_variable_internal (newname, flags); |
d42cb8c1 CR |
2079 | } |
2080 | return nv; | |
2081 | } | |
2082 | ||
2083 | /* Resolve the chain of nameref variables for NAME. XXX - could change later */ | |
2084 | SHELL_VAR * | |
a61ffa78 | 2085 | find_global_variable_last_nameref (const char *name, int vflags) |
d42cb8c1 CR |
2086 | { |
2087 | SHELL_VAR *v, *nv; | |
2088 | char *newname; | |
2089 | int level; | |
2090 | ||
2091 | nv = v = find_global_variable_noref (name); | |
2092 | level = 0; | |
2093 | while (v && nameref_p (v)) | |
2094 | { | |
2095 | level++; | |
2096 | if (level > NAMEREF_MAX) | |
2097 | return ((SHELL_VAR *)0); /* error message here? */ | |
2098 | newname = nameref_cell (v); | |
2099 | if (newname == 0 || *newname == '\0') | |
814e1ff5 | 2100 | return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0); |
d42cb8c1 | 2101 | nv = v; |
bddda3d2 | 2102 | /* We don't accommodate array subscripts here. */ |
d42cb8c1 CR |
2103 | v = find_global_variable_noref (newname); |
2104 | } | |
2105 | return nv; | |
2106 | } | |
2107 | ||
2108 | static SHELL_VAR * | |
a61ffa78 | 2109 | find_nameref_at_context (SHELL_VAR *v, VAR_CONTEXT *vc) |
d42cb8c1 CR |
2110 | { |
2111 | SHELL_VAR *nv, *nv2; | |
d42cb8c1 CR |
2112 | char *newname; |
2113 | int level; | |
2114 | ||
2115 | nv = v; | |
2116 | level = 1; | |
2117 | while (nv && nameref_p (nv)) | |
2118 | { | |
2119 | level++; | |
2120 | if (level > NAMEREF_MAX) | |
bddda3d2 | 2121 | return (&nameref_maxloop_value); |
d42cb8c1 CR |
2122 | newname = nameref_cell (nv); |
2123 | if (newname == 0 || *newname == '\0') | |
2124 | return ((SHELL_VAR *)NULL); | |
2125 | nv2 = hash_lookup (newname, vc->table); | |
2126 | if (nv2 == 0) | |
2127 | break; | |
2128 | nv = nv2; | |
2129 | } | |
2130 | return nv; | |
2131 | } | |
2132 | ||
2133 | /* Do nameref resolution from the VC, which is the local context for some | |
2134 | function or builtin, `up' the chain to the global variables context. If | |
2135 | NVCP is not NULL, return the variable context where we finally ended the | |
2136 | nameref resolution (so the bind_variable_internal can use the correct | |
2137 | variable context and hash table). */ | |
2138 | static SHELL_VAR * | |
a61ffa78 | 2139 | find_variable_nameref_context (SHELL_VAR *v, VAR_CONTEXT *vc, VAR_CONTEXT **nvcp) |
d42cb8c1 CR |
2140 | { |
2141 | SHELL_VAR *nv, *nv2; | |
2142 | VAR_CONTEXT *nvc; | |
2143 | ||
2144 | /* Look starting at the current context all the way `up' */ | |
2145 | for (nv = v, nvc = vc; nvc; nvc = nvc->down) | |
2146 | { | |
2147 | nv2 = find_nameref_at_context (nv, nvc); | |
bddda3d2 CR |
2148 | if (nv2 == &nameref_maxloop_value) |
2149 | return (nv2); /* XXX */ | |
d42cb8c1 CR |
2150 | if (nv2 == 0) |
2151 | continue; | |
2152 | nv = nv2; | |
2153 | if (*nvcp) | |
2154 | *nvcp = nvc; | |
be06f778 CR |
2155 | if (nameref_p (nv) == 0) |
2156 | break; | |
d42cb8c1 CR |
2157 | } |
2158 | return (nameref_p (nv) ? (SHELL_VAR *)NULL : nv); | |
2159 | } | |
2160 | ||
2161 | /* Do nameref resolution from the VC, which is the local context for some | |
2162 | function or builtin, `up' the chain to the global variables context. If | |
2163 | NVCP is not NULL, return the variable context where we finally ended the | |
2164 | nameref resolution (so the bind_variable_internal can use the correct | |
2165 | variable context and hash table). */ | |
2166 | static SHELL_VAR * | |
a61ffa78 | 2167 | find_variable_last_nameref_context (SHELL_VAR *v, VAR_CONTEXT *vc, VAR_CONTEXT **nvcp) |
d42cb8c1 CR |
2168 | { |
2169 | SHELL_VAR *nv, *nv2; | |
2170 | VAR_CONTEXT *nvc; | |
2171 | ||
2172 | /* Look starting at the current context all the way `up' */ | |
2173 | for (nv = v, nvc = vc; nvc; nvc = nvc->down) | |
2174 | { | |
2175 | nv2 = find_nameref_at_context (nv, nvc); | |
bddda3d2 CR |
2176 | if (nv2 == &nameref_maxloop_value) |
2177 | return (nv2); /* XXX */ | |
d42cb8c1 CR |
2178 | if (nv2 == 0) |
2179 | continue; | |
2180 | nv = nv2; | |
2181 | if (*nvcp) | |
2182 | *nvcp = nvc; | |
2183 | } | |
2184 | return (nameref_p (nv) ? nv : (SHELL_VAR *)NULL); | |
2185 | } | |
2186 | ||
bddda3d2 | 2187 | SHELL_VAR * |
a61ffa78 | 2188 | find_variable_nameref_for_create (const char *name, int flags) |
bddda3d2 CR |
2189 | { |
2190 | SHELL_VAR *var; | |
2191 | ||
2192 | /* See if we have a nameref pointing to a variable that hasn't been | |
2193 | created yet. */ | |
2194 | var = find_variable_last_nameref (name, 1); | |
e8652353 CR |
2195 | if (var == &nameref_maxloop_value) |
2196 | { | |
2197 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2198 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2199 | } | |
bddda3d2 CR |
2200 | if ((flags&1) && var && nameref_p (var) && invisible_p (var)) |
2201 | { | |
2202 | internal_warning (_("%s: removing nameref attribute"), name); | |
2203 | VUNSETATTR (var, att_nameref); | |
2204 | } | |
2205 | if (var && nameref_p (var)) | |
2206 | { | |
2207 | if (legal_identifier (nameref_cell (var)) == 0) | |
2208 | { | |
2209 | sh_invalidid (nameref_cell (var) ? nameref_cell (var) : ""); | |
2210 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2211 | } | |
2212 | } | |
2213 | return (var); | |
2214 | } | |
2215 | ||
2216 | SHELL_VAR * | |
a61ffa78 | 2217 | find_variable_nameref_for_assignment (const char *name, int flags) |
bddda3d2 CR |
2218 | { |
2219 | SHELL_VAR *var; | |
2220 | ||
2221 | /* See if we have a nameref pointing to a variable that hasn't been | |
2222 | created yet. */ | |
2223 | var = find_variable_last_nameref (name, 1); | |
e8652353 CR |
2224 | if (var == &nameref_maxloop_value) |
2225 | { | |
2226 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2227 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2228 | } | |
bddda3d2 CR |
2229 | if (var && nameref_p (var) && invisible_p (var)) /* XXX - flags */ |
2230 | { | |
2231 | internal_warning (_("%s: removing nameref attribute"), name); | |
2232 | VUNSETATTR (var, att_nameref); | |
2233 | } | |
2234 | if (var && nameref_p (var)) | |
2235 | { | |
2236 | if (valid_nameref_value (nameref_cell (var), 1) == 0) | |
2237 | { | |
2238 | sh_invalidid (nameref_cell (var) ? nameref_cell (var) : ""); | |
2239 | return ((SHELL_VAR *)INVALID_NAMEREF_VALUE); | |
2240 | } | |
2241 | } | |
2242 | return (var); | |
2243 | } | |
2244 | ||
8d125d8b CR |
2245 | /* If find_variable (name) returns NULL, check that it's not a nameref |
2246 | referencing a variable that doesn't exist. If it is, return the new | |
2247 | name. If not, return the original name. Kind of like the previous | |
2248 | function, but dealing strictly with names. This takes assignment flags | |
2249 | so it can deal with the various assignment modes used by `declare'. */ | |
2250 | char * | |
b2613ad1 | 2251 | nameref_transform_name (const char *name, int flags) |
8d125d8b CR |
2252 | { |
2253 | SHELL_VAR *v; | |
8d125d8b CR |
2254 | |
2255 | v = 0; | |
2256 | if (flags & ASS_MKLOCAL) | |
057a9fbd CR |
2257 | { |
2258 | v = find_variable_last_nameref (name, 1); | |
2259 | /* If we're making local variables, only follow namerefs that point to | |
3a7c642e | 2260 | non-existent variables at the same variable context. */ |
057a9fbd CR |
2261 | if (v && v->context != variable_context) |
2262 | v = 0; | |
2263 | } | |
8d125d8b CR |
2264 | else if (flags & ASS_MKGLOBAL) |
2265 | v = (flags & ASS_CHKLOCAL) ? find_variable_last_nameref (name, 1) | |
2266 | : find_global_variable_last_nameref (name, 1); | |
2267 | if (v && nameref_p (v) && valid_nameref_value (nameref_cell (v), 1)) | |
2268 | return nameref_cell (v); | |
b2613ad1 | 2269 | return (char *)name; |
8d125d8b CR |
2270 | } |
2271 | ||
348a457e CR |
2272 | /* Find a variable, forcing a search of the temporary environment first */ |
2273 | SHELL_VAR * | |
a61ffa78 | 2274 | find_variable_tempenv (const char *name) |
348a457e CR |
2275 | { |
2276 | SHELL_VAR *var; | |
2277 | ||
fe570ea1 | 2278 | var = find_variable_internal (name, FV_FORCETEMPENV); |
d42cb8c1 | 2279 | if (var && nameref_p (var)) |
e8652353 CR |
2280 | { |
2281 | var = find_variable_nameref (var); | |
2282 | if (var == &nameref_maxloop_value) | |
2283 | { | |
2284 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2285 | return (0); | |
2286 | } | |
2287 | } | |
348a457e CR |
2288 | return (var); |
2289 | } | |
2290 | ||
2291 | /* Find a variable, not forcing a search of the temporary environment first */ | |
2292 | SHELL_VAR * | |
a61ffa78 | 2293 | find_variable_notempenv (const char *name) |
348a457e CR |
2294 | { |
2295 | SHELL_VAR *var; | |
2296 | ||
2297 | var = find_variable_internal (name, 0); | |
d42cb8c1 | 2298 | if (var && nameref_p (var)) |
e8652353 CR |
2299 | { |
2300 | var = find_variable_nameref (var); | |
2301 | if (var == &nameref_maxloop_value) | |
2302 | { | |
2303 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2304 | return (0); | |
2305 | } | |
2306 | } | |
348a457e CR |
2307 | return (var); |
2308 | } | |
2309 | ||
6faad625 | 2310 | SHELL_VAR * |
a61ffa78 | 2311 | find_global_variable (const char *name) |
6faad625 CR |
2312 | { |
2313 | SHELL_VAR *var; | |
2314 | ||
d42cb8c1 CR |
2315 | var = var_lookup (name, global_variables); |
2316 | if (var && nameref_p (var)) | |
e8652353 CR |
2317 | { |
2318 | var = find_variable_nameref (var); /* XXX - find_global_variable_noref? */ | |
2319 | if (var == &nameref_maxloop_value) | |
2320 | { | |
2321 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2322 | return ((SHELL_VAR *)NULL); | |
2323 | } | |
2324 | } | |
d42cb8c1 CR |
2325 | |
2326 | if (var == 0) | |
2327 | return ((SHELL_VAR *)NULL); | |
2328 | ||
2329 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2330 | } | |
2331 | ||
2332 | SHELL_VAR * | |
a61ffa78 | 2333 | find_global_variable_noref (const char *name) |
d42cb8c1 CR |
2334 | { |
2335 | SHELL_VAR *var; | |
2336 | ||
6faad625 CR |
2337 | var = var_lookup (name, global_variables); |
2338 | ||
2339 | if (var == 0) | |
2340 | return ((SHELL_VAR *)NULL); | |
2341 | ||
2342 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2343 | } | |
2344 | ||
348a457e | 2345 | SHELL_VAR * |
a61ffa78 | 2346 | find_shell_variable (const char *name) |
348a457e CR |
2347 | { |
2348 | SHELL_VAR *var; | |
2349 | ||
2350 | var = var_lookup (name, shell_variables); | |
d42cb8c1 | 2351 | if (var && nameref_p (var)) |
e8652353 CR |
2352 | { |
2353 | var = find_variable_nameref (var); | |
2354 | if (var == &nameref_maxloop_value) | |
2355 | { | |
2356 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2357 | return ((SHELL_VAR *)NULL); | |
2358 | } | |
2359 | } | |
348a457e CR |
2360 | |
2361 | if (var == 0) | |
2362 | return ((SHELL_VAR *)NULL); | |
2363 | ||
2364 | return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var); | |
2365 | } | |
2366 | ||
726f6388 JA |
2367 | /* Look up the variable entry named NAME. Returns the entry or NULL. */ |
2368 | SHELL_VAR * | |
a61ffa78 | 2369 | find_variable (const char *name) |
726f6388 | 2370 | { |
d42cb8c1 | 2371 | SHELL_VAR *v; |
fe570ea1 | 2372 | int flags; |
d42cb8c1 | 2373 | |
21af69d5 | 2374 | last_table_searched = 0; |
fe570ea1 CR |
2375 | flags = 0; |
2376 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2377 | flags |= FV_FORCETEMPENV; | |
2378 | v = find_variable_internal (name, flags); | |
2379 | if (v && nameref_p (v)) | |
e8652353 CR |
2380 | { |
2381 | v = find_variable_nameref (v); | |
2382 | if (v == &nameref_maxloop_value) | |
2383 | { | |
2384 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2385 | return (0); | |
2386 | } | |
2387 | } | |
2388 | ||
fe570ea1 CR |
2389 | return v; |
2390 | } | |
2391 | ||
2392 | /* Find the first instance of NAME in the variable context chain; return first | |
2393 | one found without att_invisible set; return 0 if no non-invisible instances | |
2394 | found. */ | |
2395 | SHELL_VAR * | |
a61ffa78 | 2396 | find_variable_no_invisible (const char *name) |
fe570ea1 CR |
2397 | { |
2398 | SHELL_VAR *v; | |
2399 | int flags; | |
2400 | ||
2401 | last_table_searched = 0; | |
2402 | flags = FV_SKIPINVISIBLE; | |
2403 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2404 | flags |= FV_FORCETEMPENV; | |
2405 | v = find_variable_internal (name, flags); | |
2406 | if (v && nameref_p (v)) | |
e8652353 CR |
2407 | { |
2408 | v = find_variable_nameref (v); | |
2409 | if (v == &nameref_maxloop_value) | |
2410 | { | |
2411 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2412 | return (0); | |
2413 | } | |
2414 | } | |
2415 | ||
fe570ea1 CR |
2416 | return v; |
2417 | } | |
2418 | ||
2419 | /* Find the first instance of NAME in the variable context chain; return first | |
2420 | one found even if att_invisible set. */ | |
2421 | SHELL_VAR * | |
a61ffa78 | 2422 | find_variable_for_assignment (const char *name) |
fe570ea1 CR |
2423 | { |
2424 | SHELL_VAR *v; | |
2425 | int flags; | |
2426 | ||
2427 | last_table_searched = 0; | |
2428 | flags = 0; | |
2429 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2430 | flags |= FV_FORCETEMPENV; | |
2431 | v = find_variable_internal (name, flags); | |
d42cb8c1 | 2432 | if (v && nameref_p (v)) |
e8652353 CR |
2433 | { |
2434 | v = find_variable_nameref (v); | |
2435 | if (v == &nameref_maxloop_value) | |
2436 | { | |
2437 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
2438 | return (0); | |
2439 | } | |
2440 | } | |
2441 | ||
d42cb8c1 CR |
2442 | return v; |
2443 | } | |
2444 | ||
2445 | SHELL_VAR * | |
a61ffa78 | 2446 | find_variable_noref (const char *name) |
d42cb8c1 CR |
2447 | { |
2448 | SHELL_VAR *v; | |
fe570ea1 | 2449 | int flags; |
d42cb8c1 | 2450 | |
fe570ea1 CR |
2451 | flags = 0; |
2452 | if (expanding_redir == 0 && (assigning_in_environment || executing_builtin)) | |
2453 | flags |= FV_FORCETEMPENV; | |
2454 | v = find_variable_internal (name, flags); | |
d42cb8c1 | 2455 | return v; |
726f6388 JA |
2456 | } |
2457 | ||
2458 | /* Look up the function entry whose name matches STRING. | |
2459 | Returns the entry or NULL. */ | |
2460 | SHELL_VAR * | |
a61ffa78 | 2461 | find_function (const char *name) |
726f6388 | 2462 | { |
7117c2d2 JA |
2463 | return (hash_lookup (name, shell_functions)); |
2464 | } | |
2465 | ||
d3a24ed2 CR |
2466 | /* Find the function definition for the shell function named NAME. Returns |
2467 | the entry or NULL. */ | |
2468 | FUNCTION_DEF * | |
a61ffa78 | 2469 | find_function_def (const char *name) |
d3a24ed2 | 2470 | { |
b0c16657 | 2471 | #if defined (DEBUGGER) |
d3a24ed2 | 2472 | return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs)); |
b0c16657 CR |
2473 | #else |
2474 | return ((FUNCTION_DEF *)0); | |
2475 | #endif | |
d3a24ed2 CR |
2476 | } |
2477 | ||
7117c2d2 JA |
2478 | /* Return the value of VAR. VAR is assumed to have been the result of a |
2479 | lookup without any subscript, if arrays are compiled into the shell. */ | |
2480 | char * | |
64b2b7c0 | 2481 | get_variable_value (SHELL_VAR *var) |
7117c2d2 JA |
2482 | { |
2483 | if (var == 0) | |
2484 | return ((char *)NULL); | |
2485 | #if defined (ARRAY_VARS) | |
2486 | else if (array_p (var)) | |
2487 | return (array_reference (array_cell (var), 0)); | |
fdf670ea CR |
2488 | else if (assoc_p (var)) |
2489 | return (assoc_reference (assoc_cell (var), "0")); | |
7117c2d2 JA |
2490 | #endif |
2491 | else | |
2492 | return (value_cell (var)); | |
726f6388 JA |
2493 | } |
2494 | ||
2495 | /* Return the string value of a variable. Return NULL if the variable | |
7117c2d2 | 2496 | doesn't exist. Don't cons a new string. This is a potential memory |
d7935593 | 2497 | leak if the variable is found in the temporary environment, but doesn't |
5f2dd5ff | 2498 | leak in practice. Since functions and variables have separate name |
d7935593 | 2499 | spaces, returns NULL if var_name is a shell function only. */ |
726f6388 | 2500 | char * |
a61ffa78 | 2501 | get_string_value (const char *name) |
726f6388 | 2502 | { |
d166f048 JA |
2503 | SHELL_VAR *var; |
2504 | ||
a61ffa78 | 2505 | var = find_variable (name); |
7117c2d2 | 2506 | return ((var) ? get_variable_value (var) : (char *)NULL); |
726f6388 JA |
2507 | } |
2508 | ||
b72432fd JA |
2509 | /* This is present for use by the tilde and readline libraries. */ |
2510 | char * | |
a61ffa78 | 2511 | sh_get_env_value (const char *v) |
b72432fd JA |
2512 | { |
2513 | return get_string_value (v); | |
2514 | } | |
2515 | ||
7117c2d2 JA |
2516 | /* **************************************************************** */ |
2517 | /* */ | |
2518 | /* Creating and setting variables */ | |
2519 | /* */ | |
2520 | /* **************************************************************** */ | |
2521 | ||
a61ffa78 CR |
2522 | static inline int |
2523 | var_sametype (SHELL_VAR *v1, SHELL_VAR *v2) | |
b3bb7f60 CR |
2524 | { |
2525 | if (v1 == 0 || v2 == 0) | |
2526 | return 0; | |
2527 | #if defined (ARRAY_VARS) | |
2528 | else if (assoc_p (v1) && assoc_p (v2)) | |
2529 | return 1; | |
2530 | else if (array_p (v1) && array_p (v2)) | |
2531 | return 1; | |
2532 | else if (array_p (v1) || array_p (v2)) | |
2533 | return 0; | |
2534 | else if (assoc_p (v1) || assoc_p (v2)) | |
2535 | return 0; | |
2536 | #endif | |
2537 | else | |
2538 | return 1; | |
2539 | } | |
2540 | ||
2541 | int | |
a61ffa78 | 2542 | validate_inherited_value (SHELL_VAR *var, int type) |
b3bb7f60 CR |
2543 | { |
2544 | #if defined (ARRAY_VARS) | |
2545 | if (type == att_array && assoc_p (var)) | |
2546 | return 0; | |
2547 | else if (type == att_assoc && array_p (var)) | |
2548 | return 0; | |
2549 | else | |
2550 | #endif | |
2551 | return 1; /* should we run convert_var_to_array here or let the caller? */ | |
2552 | } | |
2553 | ||
7117c2d2 JA |
2554 | /* Set NAME to VALUE if NAME has no value. */ |
2555 | SHELL_VAR * | |
b2613ad1 | 2556 | set_if_not (const char *name, const char *value) |
7117c2d2 JA |
2557 | { |
2558 | SHELL_VAR *v; | |
2559 | ||
d3ad40de CR |
2560 | if (shell_variables == 0) |
2561 | create_variable_tables (); | |
2562 | ||
7117c2d2 JA |
2563 | v = find_variable (name); |
2564 | if (v == 0) | |
d11b8b46 | 2565 | v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0); |
7117c2d2 JA |
2566 | return (v); |
2567 | } | |
2568 | ||
726f6388 JA |
2569 | /* Create a local variable referenced by NAME. */ |
2570 | SHELL_VAR * | |
a61ffa78 | 2571 | make_local_variable (const char *name, int flags) |
726f6388 | 2572 | { |
814e1ff5 | 2573 | SHELL_VAR *new_var, *old_var, *old_ref; |
7117c2d2 JA |
2574 | VAR_CONTEXT *vc; |
2575 | int was_tmpvar; | |
8b6b8f60 | 2576 | char *old_value; |
726f6388 | 2577 | |
814e1ff5 CR |
2578 | /* We don't want to follow the nameref chain when making local variables; we |
2579 | just want to create them. */ | |
2580 | old_ref = find_variable_noref (name); | |
2581 | if (old_ref && nameref_p (old_ref) == 0) | |
2582 | old_ref = 0; | |
726f6388 JA |
2583 | /* local foo; local foo; is a no-op. */ |
2584 | old_var = find_variable (name); | |
814e1ff5 | 2585 | if (old_ref == 0 && old_var && local_p (old_var) && old_var->context == variable_context) |
fe570ea1 | 2586 | return (old_var); |
726f6388 | 2587 | |
814e1ff5 CR |
2588 | /* local -n foo; local -n foo; is a no-op. */ |
2589 | if (old_ref && local_p (old_ref) && old_ref->context == variable_context) | |
2590 | return (old_ref); | |
2591 | ||
2592 | /* From here on, we want to use the refvar, not the variable it references */ | |
2593 | if (old_ref) | |
2594 | old_var = old_ref; | |
2595 | ||
7117c2d2 | 2596 | was_tmpvar = old_var && tempvar_p (old_var); |
21af69d5 CR |
2597 | /* If we're making a local variable in a shell function, the temporary env |
2598 | has already been merged into the function's variable context stack. We | |
2599 | can assume that a temporary var in the same context appears in the same | |
2600 | VAR_CONTEXT and can safely be returned without creating a new variable | |
2601 | (which results in duplicate names in the same VAR_CONTEXT->table */ | |
2602 | /* We can't just test tmpvar_p because variables in the temporary env given | |
2603 | to a shell function appear in the function's local variable VAR_CONTEXT | |
2604 | but retain their tempvar attribute. We want temporary variables that are | |
2605 | found in temporary_env, hence the test for last_table_searched, which is | |
2606 | set in hash_lookup and only (so far) checked here. */ | |
2607 | if (was_tmpvar && old_var->context == variable_context && last_table_searched != temporary_env) | |
2608 | { | |
d2465f43 | 2609 | VUNSETATTR (old_var, att_invisible); /* XXX */ |
8bf3cfef CR |
2610 | /* We still want to flag this variable as local, though, and set things |
2611 | up so that it gets treated as a local variable. */ | |
2612 | new_var = old_var; | |
2613 | /* Since we found the variable in a temporary environment, this will | |
2614 | succeed. */ | |
2615 | for (vc = shell_variables; vc; vc = vc->down) | |
2616 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
2617 | break; | |
2618 | goto set_local_var_flags; | |
f65f3d54 | 2619 | |
21af69d5 CR |
2620 | return (old_var); |
2621 | } | |
8b6b8f60 CR |
2622 | |
2623 | /* If we want to change to "inherit the old variable's value" semantics, | |
2624 | here is where to save the old value. */ | |
2625 | old_value = was_tmpvar ? value_cell (old_var) : (char *)NULL; | |
7117c2d2 JA |
2626 | |
2627 | for (vc = shell_variables; vc; vc = vc->down) | |
2628 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
2629 | break; | |
2630 | ||
2631 | if (vc == 0) | |
2632 | { | |
5e13499c | 2633 | internal_error (_("make_local_variable: no function context at current scope")); |
7117c2d2 JA |
2634 | return ((SHELL_VAR *)NULL); |
2635 | } | |
2636 | else if (vc->table == 0) | |
2637 | vc->table = hash_create (TEMPENV_HASH_BUCKETS); | |
2638 | ||
bb70624e JA |
2639 | /* Since this is called only from the local/declare/typeset code, we can |
2640 | call builtin_error here without worry (of course, it will also work | |
28ef6c31 JA |
2641 | for anything that sets this_command_name). Variables with the `noassign' |
2642 | attribute may not be made local. The test against old_var's context | |
2643 | level is to disallow local copies of readonly global variables (since I | |
2644 | believe that this could be a security hole). Readonly copies of calling | |
2645 | function local variables are OK. */ | |
2646 | if (old_var && (noassign_p (old_var) || | |
2647 | (readonly_p (old_var) && old_var->context == 0))) | |
2648 | { | |
2649 | if (readonly_p (old_var)) | |
7117c2d2 | 2650 | sh_readonly (name); |
73a146be CR |
2651 | else if (noassign_p (old_var)) |
2652 | builtin_error (_("%s: variable may not be assigned value"), name); | |
2653 | #if 0 | |
2654 | /* Let noassign variables through with a warning */ | |
2655 | if (readonly_p (old_var)) | |
2656 | #endif | |
2657 | return ((SHELL_VAR *)NULL); | |
bb70624e JA |
2658 | } |
2659 | ||
d166f048 | 2660 | if (old_var == 0) |
14e8b2a7 | 2661 | new_var = make_new_variable (name, vc->table); |
726f6388 JA |
2662 | else |
2663 | { | |
4e4cebb6 CR |
2664 | #if 0 |
2665 | /* This handles the case where a variable is found in both the temporary | |
2666 | environment *and* declared as a local variable. If we want to avoid | |
2667 | multiple entries with the same name in VC->table (that might mess up | |
2668 | unset), we need to use the existing variable entry and destroy the | |
2669 | current value. Currently disabled because it doesn't matter -- the | |
2670 | right things happen. */ | |
2671 | new_var = 0; | |
2672 | if (was_tmpvar && (new_var = hash_lookup (name, vc->table))) | |
2673 | { | |
2674 | dispose_variable_value (new_var); | |
2675 | init_variable (new_var); | |
2676 | } | |
2677 | if (new_var == 0) | |
2678 | #endif | |
7117c2d2 | 2679 | new_var = make_new_variable (name, vc->table); |
726f6388 | 2680 | |
7117c2d2 JA |
2681 | /* If we found this variable in one of the temporary environments, |
2682 | inherit its value. Watch to see if this causes problems with | |
21af69d5 CR |
2683 | things like `x=4 local x'. XXX - see above for temporary env |
2684 | variables with the same context level as variable_context */ | |
73a146be | 2685 | /* XXX - we should only do this if the variable is not an array. */ |
8b6b8f60 CR |
2686 | /* If we want to change the local variable semantics to "inherit |
2687 | the old variable's value" here is where to set it. And we would | |
2688 | need to use copy_variable (currently unused) to do it for all | |
2689 | possible variable values. */ | |
7117c2d2 | 2690 | if (was_tmpvar) |
8b6b8f60 | 2691 | var_setvalue (new_var, savestring (old_value)); |
2e412574 | 2692 | else if (localvar_inherit || (flags & MKLOC_INHERIT)) |
8b6b8f60 CR |
2693 | { |
2694 | /* This may not make sense for nameref variables that are shadowing | |
2695 | variables with the same name, but we don't know that yet. */ | |
45cccbbc | 2696 | #if defined (ARRAY_VARS) |
8b6b8f60 CR |
2697 | if (assoc_p (old_var)) |
2698 | var_setassoc (new_var, assoc_copy (assoc_cell (old_var))); | |
2699 | else if (array_p (old_var)) | |
2700 | var_setarray (new_var, array_copy (array_cell (old_var))); | |
2701 | else if (value_cell (old_var)) | |
45cccbbc CR |
2702 | #else |
2703 | if (value_cell (old_var)) | |
2704 | #endif | |
8b6b8f60 CR |
2705 | var_setvalue (new_var, savestring (value_cell (old_var))); |
2706 | else | |
2707 | var_setvalue (new_var, (char *)NULL); | |
2708 | } | |
726f6388 | 2709 | |
2e412574 | 2710 | if (localvar_inherit || (flags & MKLOC_INHERIT)) |
8b6b8f60 CR |
2711 | { |
2712 | /* It doesn't make sense to inherit the nameref attribute */ | |
2713 | new_var->attributes = old_var->attributes & ~att_nameref; | |
2714 | new_var->dynamic_value = old_var->dynamic_value; | |
2715 | new_var->assign_func = old_var->assign_func; | |
2716 | } | |
2717 | else | |
2718 | /* We inherit the export attribute, but no others. */ | |
2719 | new_var->attributes = exported_p (old_var) ? att_exported : 0; | |
726f6388 JA |
2720 | } |
2721 | ||
8bf3cfef | 2722 | set_local_var_flags: |
7117c2d2 JA |
2723 | vc->flags |= VC_HASLOCAL; |
2724 | ||
726f6388 | 2725 | new_var->context = variable_context; |
bb70624e | 2726 | VSETATTR (new_var, att_local); |
726f6388 | 2727 | |
7117c2d2 JA |
2728 | if (ifsname (name)) |
2729 | setifs (new_var); | |
726f6388 | 2730 | |
8b6b8f60 CR |
2731 | /* value_cell will be 0 if localvar_inherit == 0 or there was no old variable |
2732 | with the same name or the old variable was invisible */ | |
6dc203b8 | 2733 | if (was_tmpvar == 0 && value_cell (new_var) == 0) |
ff325787 | 2734 | VSETATTR (new_var, att_invisible); /* XXX */ |
726f6388 JA |
2735 | return (new_var); |
2736 | } | |
2737 | ||
4e4cebb6 CR |
2738 | static void |
2739 | init_variable (SHELL_VAR *entry) | |
726f6388 | 2740 | { |
7117c2d2 | 2741 | var_setvalue (entry, (char *)NULL); |
bb70624e | 2742 | CLEAR_EXPORTSTR (entry); |
726f6388 | 2743 | |
7117c2d2 JA |
2744 | entry->dynamic_value = (sh_var_value_func_t *)NULL; |
2745 | entry->assign_func = (sh_var_assign_func_t *)NULL; | |
2746 | ||
2747 | entry->attributes = 0; | |
ccc6cda3 JA |
2748 | |
2749 | /* Always assume variables are to be made at toplevel! | |
39feef01 | 2750 | make_local_variable has the responsibility of changing the |
ccc6cda3 JA |
2751 | variable context. */ |
2752 | entry->context = 0; | |
4e4cebb6 | 2753 | } |
7117c2d2 | 2754 | |
4e4cebb6 CR |
2755 | /* Create a new shell variable with name NAME. */ |
2756 | static SHELL_VAR * | |
2757 | new_shell_variable (const char *name) | |
2758 | { | |
2759 | SHELL_VAR *entry; | |
2760 | ||
2761 | entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
2762 | ||
2763 | entry->name = savestring (name); | |
2764 | init_variable (entry); | |
7117c2d2 JA |
2765 | return (entry); |
2766 | } | |
2767 | ||
2768 | /* Create a new shell variable with name NAME and add it to the hash table | |
2769 | TABLE. */ | |
2770 | static SHELL_VAR * | |
a61ffa78 | 2771 | make_new_variable (const char *name, HASH_TABLE *table) |
7117c2d2 JA |
2772 | { |
2773 | SHELL_VAR *entry; | |
2774 | BUCKET_CONTENTS *elt; | |
2775 | ||
2776 | entry = new_shell_variable (name); | |
ccc6cda3 | 2777 | |
28ef6c31 JA |
2778 | /* Make sure we have a shell_variables hash table to add to. */ |
2779 | if (shell_variables == 0) | |
d3ad40de | 2780 | create_variable_tables (); |
28ef6c31 | 2781 | |
7117c2d2 JA |
2782 | elt = hash_insert (savestring (name), table, HASH_NOSRCH); |
2783 | elt->data = (PTR_T)entry; | |
ccc6cda3 JA |
2784 | |
2785 | return entry; | |
2786 | } | |
2787 | ||
2788 | #if defined (ARRAY_VARS) | |
2789 | SHELL_VAR * | |
b2613ad1 | 2790 | make_new_array_variable (const char *name) |
ccc6cda3 JA |
2791 | { |
2792 | SHELL_VAR *entry; | |
2793 | ARRAY *array; | |
2794 | ||
7117c2d2 JA |
2795 | entry = make_new_variable (name, global_variables->table); |
2796 | array = array_create (); | |
fdf670ea | 2797 | |
7117c2d2 | 2798 | var_setarray (entry, array); |
bb70624e | 2799 | VSETATTR (entry, att_array); |
ccc6cda3 JA |
2800 | return entry; |
2801 | } | |
fdf670ea CR |
2802 | |
2803 | SHELL_VAR * | |
b2613ad1 | 2804 | make_local_array_variable (const char *name, int flags) |
fdf670ea CR |
2805 | { |
2806 | SHELL_VAR *var; | |
2807 | ARRAY *array; | |
cf58e12c CR |
2808 | int assoc_ok; |
2809 | ||
2810 | assoc_ok = flags & MKLOC_ASSOCOK; | |
fdf670ea | 2811 | |
cf58e12c | 2812 | var = make_local_variable (name, flags & MKLOC_INHERIT); /* XXX for now */ |
8d125d8b CR |
2813 | /* If ASSOC_OK is non-zero, assume that we are ok with letting an assoc |
2814 | variable return to the caller without converting it. The caller will | |
2815 | either flag an error or do the conversion itself. */ | |
7f947b68 | 2816 | if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var))) |
fdf670ea CR |
2817 | return var; |
2818 | ||
b3bb7f60 | 2819 | /* Validate any value we inherited from a variable instance at a previous |
3a7c642e | 2820 | scope and discard anything that's invalid. */ |
057a9fbd CR |
2821 | if (localvar_inherit && assoc_p (var)) |
2822 | { | |
701f36c2 | 2823 | internal_warning (_("%s: cannot inherit value from incompatible type"), name); |
057a9fbd CR |
2824 | VUNSETATTR (var, att_assoc); |
2825 | dispose_variable_value (var); | |
2826 | array = array_create (); | |
2827 | var_setarray (var, array); | |
2828 | } | |
2829 | else if (localvar_inherit) | |
2830 | var = convert_var_to_array (var); /* XXX */ | |
2831 | else | |
2832 | { | |
2833 | dispose_variable_value (var); | |
2834 | array = array_create (); | |
2835 | var_setarray (var, array); | |
2836 | } | |
b3bb7f60 | 2837 | |
fdf670ea CR |
2838 | VSETATTR (var, att_array); |
2839 | return var; | |
2840 | } | |
2841 | ||
2842 | SHELL_VAR * | |
b2613ad1 | 2843 | make_new_assoc_variable (const char *name) |
fdf670ea CR |
2844 | { |
2845 | SHELL_VAR *entry; | |
2846 | HASH_TABLE *hash; | |
2847 | ||
2848 | entry = make_new_variable (name, global_variables->table); | |
3235014e | 2849 | hash = assoc_create (ASSOC_HASH_BUCKETS); |
fdf670ea CR |
2850 | |
2851 | var_setassoc (entry, hash); | |
2852 | VSETATTR (entry, att_assoc); | |
2853 | return entry; | |
2854 | } | |
2855 | ||
2856 | SHELL_VAR * | |
b2613ad1 | 2857 | make_local_assoc_variable (const char *name, int flags) |
fdf670ea CR |
2858 | { |
2859 | SHELL_VAR *var; | |
2860 | HASH_TABLE *hash; | |
cf58e12c | 2861 | int array_ok; |
fdf670ea | 2862 | |
cf58e12c CR |
2863 | array_ok = flags & MKLOC_ARRAYOK; |
2864 | ||
2865 | var = make_local_variable (name, flags & MKLOC_INHERIT); /* XXX for now */ | |
8d125d8b CR |
2866 | /* If ARRAY_OK is non-zero, assume that we are ok with letting an array |
2867 | variable return to the caller without converting it. The caller will | |
2868 | either flag an error or do the conversion itself. */ | |
2869 | if (var == 0 || assoc_p (var) || (array_ok && array_p (var))) | |
fdf670ea CR |
2870 | return var; |
2871 | ||
b3bb7f60 | 2872 | /* Validate any value we inherited from a variable instance at a previous |
3a7c642e | 2873 | scope and discard anything that's invalid. */ |
057a9fbd CR |
2874 | if (localvar_inherit && array_p (var)) |
2875 | { | |
701f36c2 | 2876 | internal_warning (_("%s: cannot inherit value from incompatible type"), name); |
057a9fbd CR |
2877 | VUNSETATTR (var, att_array); |
2878 | dispose_variable_value (var); | |
3235014e | 2879 | hash = assoc_create (ASSOC_HASH_BUCKETS); |
057a9fbd CR |
2880 | var_setassoc (var, hash); |
2881 | } | |
2882 | else if (localvar_inherit) | |
2883 | var = convert_var_to_assoc (var); /* XXX */ | |
2884 | else | |
2885 | { | |
2886 | dispose_variable_value (var); | |
3235014e | 2887 | hash = assoc_create (ASSOC_HASH_BUCKETS); |
057a9fbd CR |
2888 | var_setassoc (var, hash); |
2889 | } | |
b3bb7f60 | 2890 | |
fdf670ea CR |
2891 | VSETATTR (var, att_assoc); |
2892 | return var; | |
2893 | } | |
ccc6cda3 JA |
2894 | #endif |
2895 | ||
2896 | char * | |
b2613ad1 | 2897 | make_variable_value (SHELL_VAR *var, const char *value, int flags) |
ccc6cda3 | 2898 | { |
d11b8b46 CR |
2899 | char *retval, *oval; |
2900 | intmax_t lval, rval; | |
2e725f73 CR |
2901 | int expok, op; |
2902 | size_t olen; | |
ccc6cda3 JA |
2903 | |
2904 | /* If this variable has had its type set to integer (via `declare -i'), | |
2905 | then do expression evaluation on it and store the result. The | |
7117c2d2 | 2906 | functions in expr.c (evalexp()) and bind_int_variable() are responsible |
ccc6cda3 | 2907 | for turning off the integer flag if they don't want further |
124d67cd CR |
2908 | evaluation done. Callers that find it inconvenient to do this can set |
2909 | the ASS_NOEVAL flag. For the special case of arithmetic expression | |
2910 | evaluation, the caller can set ASS_NOLONGJMP to avoid jumping out to | |
2911 | top_level. */ | |
2912 | if ((flags & ASS_NOEVAL) == 0 && integer_p (var)) | |
ccc6cda3 | 2913 | { |
d11b8b46 CR |
2914 | if (flags & ASS_APPEND) |
2915 | { | |
2916 | oval = value_cell (var); | |
a57ed9e9 | 2917 | lval = evalexp (oval, 0, &expok); /* ksh93 seems to do this */ |
d11b8b46 | 2918 | if (expok == 0) |
c184f645 | 2919 | { |
124d67cd CR |
2920 | if (flags & ASS_NOLONGJMP) |
2921 | goto make_value; | |
2922 | else | |
2923 | { | |
2924 | top_level_cleanup (); | |
2925 | jump_to_top_level (DISCARD); | |
2926 | } | |
c184f645 | 2927 | } |
d11b8b46 | 2928 | } |
a57ed9e9 | 2929 | rval = evalexp (value, 0, &expok); |
d166f048 | 2930 | if (expok == 0) |
aea33a6b | 2931 | { |
124d67cd CR |
2932 | if (flags & ASS_NOLONGJMP) |
2933 | goto make_value; | |
2934 | else | |
2935 | { | |
2936 | top_level_cleanup (); | |
2937 | jump_to_top_level (DISCARD); | |
2938 | } | |
aea33a6b | 2939 | } |
adbaf2b3 CR |
2940 | /* This can be fooled if the variable's value changes while evaluating |
2941 | `rval'. We can change it if we move the evaluation of lval to here. */ | |
d11b8b46 CR |
2942 | if (flags & ASS_APPEND) |
2943 | rval += lval; | |
2944 | retval = itos (rval); | |
ccc6cda3 | 2945 | } |
fdf670ea | 2946 | #if defined (CASEMOD_ATTRS) |
124d67cd | 2947 | else if ((flags & ASS_NOEVAL) == 0 && (capcase_p (var) || uppercase_p (var) || lowercase_p (var))) |
fdf670ea CR |
2948 | { |
2949 | if (flags & ASS_APPEND) | |
2950 | { | |
2951 | oval = get_variable_value (var); | |
2952 | if (oval == 0) /* paranoia */ | |
2953 | oval = ""; | |
2954 | olen = STRLEN (oval); | |
2955 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2956 | strcpy (retval, oval); | |
2957 | if (value) | |
2958 | strcpy (retval+olen, value); | |
2959 | } | |
fdf670ea CR |
2960 | else if (*value) |
2961 | retval = savestring (value); | |
2962 | else | |
2963 | { | |
2964 | retval = (char *)xmalloc (1); | |
2965 | retval[0] = '\0'; | |
2966 | } | |
2967 | op = capcase_p (var) ? CASE_CAPITALIZE | |
2968 | : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER); | |
2969 | oval = sh_modcase (retval, (char *)0, op); | |
2970 | free (retval); | |
2971 | retval = oval; | |
2972 | } | |
09767ff0 | 2973 | #endif /* CASEMOD_ATTRS */ |
ccc6cda3 JA |
2974 | else if (value) |
2975 | { | |
124d67cd | 2976 | make_value: |
d11b8b46 CR |
2977 | if (flags & ASS_APPEND) |
2978 | { | |
f5635ecd | 2979 | oval = get_variable_value (var); |
d11b8b46 CR |
2980 | if (oval == 0) /* paranoia */ |
2981 | oval = ""; | |
2982 | olen = STRLEN (oval); | |
2983 | retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1); | |
2984 | strcpy (retval, oval); | |
2985 | if (value) | |
2986 | strcpy (retval+olen, value); | |
2987 | } | |
2988 | else if (*value) | |
ccc6cda3 JA |
2989 | retval = savestring (value); |
2990 | else | |
726f6388 | 2991 | { |
f73dda09 | 2992 | retval = (char *)xmalloc (1); |
ccc6cda3 | 2993 | retval[0] = '\0'; |
726f6388 | 2994 | } |
ccc6cda3 JA |
2995 | } |
2996 | else | |
2997 | retval = (char *)NULL; | |
726f6388 | 2998 | |
ccc6cda3 JA |
2999 | return retval; |
3000 | } | |
726f6388 | 3001 | |
e297b059 CR |
3002 | /* If we can optimize appending to string variables, say so */ |
3003 | static int | |
b2613ad1 | 3004 | can_optimize_assignment (SHELL_VAR *entry, const char *value, int aflags) |
e297b059 CR |
3005 | { |
3006 | if ((aflags & ASS_APPEND) == 0) | |
3007 | return 0; | |
3008 | #if defined (ARRAY_VARS) | |
3009 | if (array_p (entry) || assoc_p (entry)) | |
3010 | return 0; | |
3011 | #endif | |
3012 | if (integer_p (entry) || uppercase_p (entry) || lowercase_p (entry) || capcase_p (entry)) | |
3013 | return 0; | |
3014 | if (readonly_p (entry) || noassign_p (entry)) | |
3015 | return 0; | |
3016 | return 1; | |
3017 | } | |
3018 | ||
3019 | /* right now we optimize appends to string variables */ | |
3020 | static SHELL_VAR * | |
b2613ad1 | 3021 | optimized_assignment (SHELL_VAR *entry, const char *value, int aflags) |
e297b059 CR |
3022 | { |
3023 | size_t len, vlen; | |
3024 | char *v, *new; | |
3025 | ||
3026 | v = value_cell (entry); | |
3027 | len = STRLEN (v); | |
3028 | vlen = STRLEN (value); | |
3029 | ||
3030 | new = (char *)xrealloc (v, len + vlen + 8); /* for now */ | |
3031 | if (vlen == 1) | |
3032 | { | |
3033 | new[len] = *value; | |
3034 | new[len+1] = '\0'; | |
3035 | } | |
3036 | else | |
3037 | strcpy (new + len, value); | |
3038 | var_setvalue (entry, new); | |
3039 | return entry; | |
3040 | } | |
3041 | ||
7117c2d2 | 3042 | /* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the |
124d67cd CR |
3043 | temporary environment (but usually is not). HFLAGS controls how NAME |
3044 | is looked up in TABLE; AFLAGS controls how VALUE is assigned */ | |
7117c2d2 | 3045 | static SHELL_VAR * |
b2613ad1 | 3046 | bind_variable_internal (const char *name, const char *value, HASH_TABLE *table, int hflags, int aflags) |
ccc6cda3 | 3047 | { |
fe17e988 CR |
3048 | char *newval, *tname; |
3049 | SHELL_VAR *entry, *tentry; | |
28ef6c31 | 3050 | |
7117c2d2 | 3051 | entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table); |
d42cb8c1 CR |
3052 | /* Follow the nameref chain here if this is the global variables table */ |
3053 | if (entry && nameref_p (entry) && (invisible_p (entry) == 0) && table == global_variables->table) | |
3054 | { | |
3055 | entry = find_global_variable (entry->name); | |
3056 | /* Let's see if we have a nameref referencing a variable that hasn't yet | |
3057 | been created. */ | |
3058 | if (entry == 0) | |
814e1ff5 | 3059 | entry = find_variable_last_nameref (name, 0); /* XXX */ |
d42cb8c1 CR |
3060 | if (entry == 0) /* just in case */ |
3061 | return (entry); | |
3062 | } | |
ccc6cda3 | 3063 | |
814e1ff5 CR |
3064 | /* The first clause handles `declare -n ref; ref=x;' or `declare -n ref; |
3065 | declare -n ref' */ | |
d42cb8c1 | 3066 | if (entry && invisible_p (entry) && nameref_p (entry)) |
f30e2230 | 3067 | { |
bddda3d2 | 3068 | if ((aflags & ASS_FORCE) == 0 && value && valid_nameref_value (value, 0) == 0) |
f30e2230 CR |
3069 | { |
3070 | sh_invalidid (value); | |
3071 | return ((SHELL_VAR *)NULL); | |
3072 | } | |
3073 | goto assign_value; | |
3074 | } | |
d42cb8c1 CR |
3075 | else if (entry && nameref_p (entry)) |
3076 | { | |
96efdbb5 CR |
3077 | newval = nameref_cell (entry); /* XXX - newval can't be NULL here */ |
3078 | if (valid_nameref_value (newval, 0) == 0) | |
3079 | { | |
3080 | sh_invalidid (newval); | |
3081 | return ((SHELL_VAR *)NULL); | |
3082 | } | |
d42cb8c1 | 3083 | #if defined (ARRAY_VARS) |
fe17e988 | 3084 | /* declare -n foo=x[2] ; foo=bar */ |
2171061f | 3085 | if (valid_array_reference (newval, 0)) |
f30e2230 | 3086 | { |
64a7a624 | 3087 | tname = array_variable_name (newval, 0, (char **)0, (int *)0); |
ae0865bc CR |
3088 | if (tname && (tentry = find_variable_noref (tname)) && nameref_p (tentry)) |
3089 | { | |
3090 | /* nameref variables can't be arrays */ | |
3091 | internal_warning (_("%s: removing nameref attribute"), name_cell (tentry)); | |
3092 | FREE (value_cell (tentry)); /* XXX - bash-4.3 compat */ | |
3093 | var_setvalue (tentry, (char *)NULL); | |
3094 | VUNSETATTR (tentry, att_nameref); | |
3095 | } | |
3096 | free (tname); | |
a9cf0031 CR |
3097 | |
3098 | /* entry == nameref variable; tentry == array variable; | |
3099 | newval == x[2]; value = bar | |
3100 | We don't need to call make_variable_value here, since | |
3101 | assign_array_element will eventually do it itself based on | |
3102 | newval and aflags. */ | |
b2b78a63 CR |
3103 | |
3104 | entry = assign_array_element (newval, value, aflags|ASS_NAMEREF, (array_eltstate_t *)0); | |
f30e2230 CR |
3105 | if (entry == 0) |
3106 | return entry; | |
3107 | } | |
d42cb8c1 CR |
3108 | else |
3109 | #endif | |
124d67cd CR |
3110 | { |
3111 | entry = make_new_variable (newval, table); | |
3112 | var_setvalue (entry, make_variable_value (entry, value, aflags)); | |
3113 | } | |
d42cb8c1 CR |
3114 | } |
3115 | else if (entry == 0) | |
ccc6cda3 | 3116 | { |
7117c2d2 | 3117 | entry = make_new_variable (name, table); |
124d67cd | 3118 | var_setvalue (entry, make_variable_value (entry, value, aflags)); /* XXX */ |
726f6388 | 3119 | } |
28ef6c31 | 3120 | else if (entry->assign_func) /* array vars have assign functions now */ |
bb70624e | 3121 | { |
e34adc2c CR |
3122 | if ((readonly_p (entry) && (aflags & ASS_FORCE) == 0) || noassign_p (entry)) |
3123 | { | |
3124 | if (readonly_p (entry)) | |
3125 | err_readonly (name_cell (entry)); | |
3126 | return (entry); | |
3127 | } | |
3128 | ||
bb70624e | 3129 | INVALIDATE_EXPORTSTR (entry); |
b2613ad1 | 3130 | newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : (char *)value; |
2695f55d CR |
3131 | if (assoc_p (entry)) |
3132 | entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0")); | |
3133 | else if (array_p (entry)) | |
3134 | entry = (*(entry->assign_func)) (entry, newval, 0, 0); | |
3135 | else | |
3136 | entry = (*(entry->assign_func)) (entry, newval, -1, 0); | |
6e70dbff | 3137 | if (newval != value) |
fdf670ea | 3138 | free (newval); |
6e70dbff | 3139 | return (entry); |
bb70624e | 3140 | } |
726f6388 JA |
3141 | else |
3142 | { | |
d42cb8c1 | 3143 | assign_value: |
09f70f2f | 3144 | if ((readonly_p (entry) && (aflags & ASS_FORCE) == 0) || noassign_p (entry)) |
726f6388 | 3145 | { |
28ef6c31 | 3146 | if (readonly_p (entry)) |
80df5e50 | 3147 | err_readonly (name_cell (entry)); |
726f6388 JA |
3148 | return (entry); |
3149 | } | |
3150 | ||
3151 | /* Variables which are bound are visible. */ | |
bb70624e | 3152 | VUNSETATTR (entry, att_invisible); |
726f6388 | 3153 | |
e297b059 CR |
3154 | /* If we can optimize the assignment, do so and return. Right now, we |
3155 | optimize appends to string variables. */ | |
3156 | if (can_optimize_assignment (entry, value, aflags)) | |
3157 | { | |
3158 | INVALIDATE_EXPORTSTR (entry); | |
3159 | optimized_assignment (entry, value, aflags); | |
3160 | ||
3161 | if (mark_modified_vars) | |
3162 | VSETATTR (entry, att_exported); | |
3163 | ||
3164 | if (exported_p (entry)) | |
3165 | array_needs_making = 1; | |
3166 | ||
3167 | return (entry); | |
3168 | } | |
ec157dfe CR |
3169 | |
3170 | #if defined (ARRAY_VARS) | |
3171 | if (assoc_p (entry) || array_p (entry)) | |
3172 | newval = make_array_variable_value (entry, 0, "0", value, aflags); | |
3173 | else | |
3174 | #endif | |
d11b8b46 | 3175 | newval = make_variable_value (entry, value, aflags); /* XXX */ |
726f6388 | 3176 | |
bb70624e JA |
3177 | /* Invalidate any cached export string */ |
3178 | INVALIDATE_EXPORTSTR (entry); | |
3179 | ||
ccc6cda3 JA |
3180 | #if defined (ARRAY_VARS) |
3181 | /* XXX -- this bears looking at again -- XXX */ | |
3182 | /* If an existing array variable x is being assigned to with x=b or | |
3183 | `read x' or something of that nature, silently convert it to | |
3184 | x[0]=b or `read x[0]'. */ | |
861a1900 | 3185 | if (assoc_p (entry)) |
d166f048 | 3186 | { |
861a1900 | 3187 | assoc_insert (assoc_cell (entry), savestring ("0"), newval); |
d166f048 JA |
3188 | free (newval); |
3189 | } | |
861a1900 | 3190 | else if (array_p (entry)) |
fdf670ea | 3191 | { |
861a1900 | 3192 | array_insert (array_cell (entry), 0, newval); |
fdf670ea CR |
3193 | free (newval); |
3194 | } | |
726f6388 | 3195 | else |
f73dda09 | 3196 | #endif |
726f6388 | 3197 | { |
7117c2d2 JA |
3198 | FREE (value_cell (entry)); |
3199 | var_setvalue (entry, newval); | |
726f6388 JA |
3200 | } |
3201 | } | |
3202 | ||
3203 | if (mark_modified_vars) | |
bb70624e | 3204 | VSETATTR (entry, att_exported); |
726f6388 JA |
3205 | |
3206 | if (exported_p (entry)) | |
3207 | array_needs_making = 1; | |
3208 | ||
3209 | return (entry); | |
3210 | } | |
7117c2d2 JA |
3211 | |
3212 | /* Bind a variable NAME to VALUE. This conses up the name | |
3213 | and value strings. If we have a temporary environment, we bind there | |
3214 | first, then we bind into shell_variables. */ | |
3215 | ||
3216 | SHELL_VAR * | |
b2613ad1 | 3217 | bind_variable (const char *name, const char *value, int flags) |
7117c2d2 | 3218 | { |
d42cb8c1 CR |
3219 | SHELL_VAR *v, *nv; |
3220 | VAR_CONTEXT *vc, *nvc; | |
7117c2d2 JA |
3221 | |
3222 | if (shell_variables == 0) | |
d3ad40de | 3223 | create_variable_tables (); |
7117c2d2 JA |
3224 | |
3225 | /* If we have a temporary environment, look there first for the variable, | |
3226 | and, if found, modify the value there before modifying it in the | |
3227 | shell_variables table. This allows sourced scripts to modify values | |
3228 | given to them in a temporary environment while modifying the variable | |
4e4cebb6 CR |
3229 | value that the caller sees. The caller can inhibit this by setting |
3230 | ASS_NOTEMPENV in FLAGS. */ | |
3231 | if (temporary_env && value && (flags & ASS_NOTEMPENV) == 0) /* XXX - can value be null here? */ | |
7117c2d2 JA |
3232 | bind_tempenv_variable (name, value); |
3233 | ||
3234 | /* XXX -- handle local variables here. */ | |
3235 | for (vc = shell_variables; vc; vc = vc->down) | |
3236 | { | |
3237 | if (vc_isfuncenv (vc) || vc_isbltnenv (vc)) | |
fdf670ea CR |
3238 | { |
3239 | v = hash_lookup (name, vc->table); | |
d42cb8c1 CR |
3240 | nvc = vc; |
3241 | if (v && nameref_p (v)) | |
3242 | { | |
8bf3cfef CR |
3243 | /* This starts at the context where we found the nameref. If we |
3244 | want to start the name resolution over again at the original | |
3245 | context, this is where we need to change it */ | |
d42cb8c1 CR |
3246 | nv = find_variable_nameref_context (v, vc, &nvc); |
3247 | if (nv == 0) | |
3248 | { | |
3249 | nv = find_variable_last_nameref_context (v, vc, &nvc); | |
e8652353 | 3250 | if (nv && nv != &nameref_maxloop_value && nameref_p (nv)) |
ff325787 CR |
3251 | { |
3252 | /* If this nameref variable doesn't have a value yet, | |
3253 | set the value. Otherwise, assign using the value as | |
3254 | normal. */ | |
3255 | if (nameref_cell (nv) == 0) | |
3256 | return (bind_variable_internal (nv->name, value, nvc->table, 0, flags)); | |
aee3e561 | 3257 | #if defined (ARRAY_VARS) |
2171061f | 3258 | else if (valid_array_reference (nameref_cell (nv), 0)) |
b2b78a63 | 3259 | return (assign_array_element (nameref_cell (nv), value, flags, (array_eltstate_t *)0)); |
aee3e561 CR |
3260 | else |
3261 | #endif | |
ff325787 CR |
3262 | return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags)); |
3263 | } | |
bddda3d2 CR |
3264 | else if (nv == &nameref_maxloop_value) |
3265 | { | |
e8652353 | 3266 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), v->name, NAMEREF_MAX); |
8bf3cfef | 3267 | return (bind_global_variable (v->name, value, flags)); |
bddda3d2 | 3268 | } |
d42cb8c1 CR |
3269 | else |
3270 | v = nv; | |
3271 | } | |
bddda3d2 CR |
3272 | else if (nv == &nameref_maxloop_value) |
3273 | { | |
e8652353 | 3274 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), v->name, NAMEREF_MAX); |
8bf3cfef | 3275 | return (bind_global_variable (v->name, value, flags)); |
bddda3d2 | 3276 | } |
d42cb8c1 CR |
3277 | else |
3278 | v = nv; | |
3279 | } | |
fdf670ea | 3280 | if (v) |
d42cb8c1 | 3281 | return (bind_variable_internal (v->name, value, nvc->table, 0, flags)); |
fdf670ea | 3282 | } |
7117c2d2 | 3283 | } |
d42cb8c1 | 3284 | /* bind_variable_internal will handle nameref resolution in this case */ |
d11b8b46 | 3285 | return (bind_variable_internal (name, value, global_variables->table, 0, flags)); |
7117c2d2 | 3286 | } |
726f6388 | 3287 | |
36eb585c | 3288 | SHELL_VAR * |
b2613ad1 | 3289 | bind_global_variable (const char *name, const char *value, int flags) |
36eb585c | 3290 | { |
36eb585c CR |
3291 | if (shell_variables == 0) |
3292 | create_variable_tables (); | |
3293 | ||
3294 | /* bind_variable_internal will handle nameref resolution in this case */ | |
3295 | return (bind_variable_internal (name, value, global_variables->table, 0, flags)); | |
3296 | } | |
3297 | ||
8d125d8b | 3298 | static SHELL_VAR * |
b2613ad1 | 3299 | bind_invalid_envvar (const char *name, const char *value, int aflags) |
8d125d8b CR |
3300 | { |
3301 | if (invalid_env == 0) | |
3302 | invalid_env = hash_create (64); /* XXX */ | |
a61ffa78 | 3303 | return (bind_variable_internal (name, value, invalid_env, HASH_NOSRCH, aflags)); |
8d125d8b CR |
3304 | } |
3305 | ||
bb70624e JA |
3306 | /* Make VAR, a simple shell variable, have value VALUE. Once assigned a |
3307 | value, variables are no longer invisible. This is a duplicate of part | |
3308 | of the internals of bind_variable. If the variable is exported, or | |
3309 | all modified variables should be exported, mark the variable for export | |
3310 | and note that the export environment needs to be recreated. */ | |
3311 | SHELL_VAR * | |
a61ffa78 | 3312 | bind_variable_value (SHELL_VAR *var, char *value, int aflags) |
bb70624e JA |
3313 | { |
3314 | char *t; | |
bb579650 | 3315 | int invis; |
bb70624e | 3316 | |
bb579650 | 3317 | invis = invisible_p (var); |
bb70624e JA |
3318 | VUNSETATTR (var, att_invisible); |
3319 | ||
6e70dbff CR |
3320 | if (var->assign_func) |
3321 | { | |
3322 | /* If we're appending, we need the old value, so use | |
3323 | make_variable_value */ | |
3324 | t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value; | |
fdf670ea | 3325 | (*(var->assign_func)) (var, t, -1, 0); |
6e70dbff CR |
3326 | if (t != value && t) |
3327 | free (t); | |
3328 | } | |
3329 | else | |
3330 | { | |
3331 | t = make_variable_value (var, value, aflags); | |
80c3b1d4 | 3332 | if ((aflags & (ASS_NAMEREF|ASS_FORCE)) == ASS_NAMEREF && check_selfref (name_cell (var), t, 0)) |
80df5e50 CR |
3333 | { |
3334 | if (variable_context) | |
3335 | internal_warning (_("%s: circular name reference"), name_cell (var)); | |
3336 | else | |
3337 | { | |
3338 | internal_error (_("%s: nameref variable self references not allowed"), name_cell (var)); | |
3339 | free (t); | |
3340 | if (invis) | |
3341 | VSETATTR (var, att_invisible); /* XXX */ | |
3342 | return ((SHELL_VAR *)NULL); | |
3343 | } | |
3344 | } | |
3345 | if ((aflags & ASS_NAMEREF) && (valid_nameref_value (t, 0) == 0)) | |
bb579650 CR |
3346 | { |
3347 | free (t); | |
3348 | if (invis) | |
3349 | VSETATTR (var, att_invisible); /* XXX */ | |
3350 | return ((SHELL_VAR *)NULL); | |
3351 | } | |
6e70dbff CR |
3352 | FREE (value_cell (var)); |
3353 | var_setvalue (var, t); | |
3354 | } | |
bb70624e JA |
3355 | |
3356 | INVALIDATE_EXPORTSTR (var); | |
3357 | ||
3358 | if (mark_modified_vars) | |
3359 | VSETATTR (var, att_exported); | |
3360 | ||
3361 | if (exported_p (var)) | |
3362 | array_needs_making = 1; | |
3363 | ||
3364 | return (var); | |
3365 | } | |
3366 | ||
3367 | /* Bind/create a shell variable with the name LHS to the RHS. | |
3368 | This creates or modifies a variable such that it is an integer. | |
3369 | ||
3370 | This used to be in expr.c, but it is here so that all of the | |
3371 | variable binding stuff is localized. Since we don't want any | |
3372 | recursive evaluation from bind_variable() (possible without this code, | |
3373 | since bind_variable() calls the evaluator for variables with the integer | |
3374 | attribute set), we temporarily turn off the integer attribute for each | |
3375 | variable we set here, then turn it back on after binding as necessary. */ | |
3376 | ||
3377 | SHELL_VAR * | |
b2613ad1 | 3378 | bind_int_variable (const char *lhs, const char *rhs, int flags) |
bb70624e JA |
3379 | { |
3380 | register SHELL_VAR *v; | |
1d17c604 | 3381 | int isint, isarr, implicitarray, vflags, avflags; |
7117c2d2 | 3382 | |
348a457e | 3383 | isint = isarr = implicitarray = 0; |
7117c2d2 | 3384 | #if defined (ARRAY_VARS) |
c3b18681 | 3385 | /* Don't rely on VA_NOEXPAND being 1, set it explicitly */ |
76112093 | 3386 | vflags = convert_assign_flags_to_validarray_flags (flags); |
c3b18681 | 3387 | if (valid_array_reference (lhs, vflags)) |
7117c2d2 JA |
3388 | { |
3389 | isarr = 1; | |
76112093 | 3390 | avflags = convert_assign_flags_to_arrayval_flags (flags); |
1d17c604 | 3391 | v = array_variable_part (lhs, avflags, (char **)0, (int *)0); |
7117c2d2 | 3392 | } |
3d31a311 CR |
3393 | else if (legal_identifier (lhs) == 0) |
3394 | { | |
3395 | sh_invalidid (lhs); | |
3396 | return ((SHELL_VAR *)NULL); | |
3397 | } | |
7117c2d2 JA |
3398 | else |
3399 | #endif | |
3400 | v = find_variable (lhs); | |
bb70624e | 3401 | |
bb70624e JA |
3402 | if (v) |
3403 | { | |
3404 | isint = integer_p (v); | |
3405 | VUNSETATTR (v, att_integer); | |
348a457e CR |
3406 | #if defined (ARRAY_VARS) |
3407 | if (array_p (v) && isarr == 0) | |
3408 | implicitarray = 1; | |
3409 | #endif | |
bb70624e JA |
3410 | } |
3411 | ||
7117c2d2 JA |
3412 | #if defined (ARRAY_VARS) |
3413 | if (isarr) | |
b2b78a63 | 3414 | v = assign_array_element (lhs, rhs, flags, (array_eltstate_t *)0); |
348a457e | 3415 | else if (implicitarray) |
06db13a4 | 3416 | v = bind_array_variable (lhs, 0, rhs, 0); /* XXX - check on flags */ |
7117c2d2 JA |
3417 | else |
3418 | #endif | |
61c476d2 | 3419 | v = bind_variable (lhs, rhs, 0); /* why not use bind_variable_value? */ |
7117c2d2 | 3420 | |
60b80a1f CR |
3421 | if (v) |
3422 | { | |
3423 | if (isint) | |
3424 | VSETATTR (v, att_integer); | |
3425 | VUNSETATTR (v, att_invisible); | |
3426 | } | |
a37d979e | 3427 | |
814e1ff5 CR |
3428 | if (v && nameref_p (v)) |
3429 | internal_warning (_("%s: assigning integer to name reference"), lhs); | |
3430 | ||
bb70624e JA |
3431 | return (v); |
3432 | } | |
3433 | ||
ccc6cda3 | 3434 | SHELL_VAR * |
b2613ad1 | 3435 | bind_var_to_int (const char *var, intmax_t val, int flags) |
ccc6cda3 | 3436 | { |
7117c2d2 | 3437 | char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p; |
ccc6cda3 | 3438 | |
f73dda09 | 3439 | p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0); |
046d0cc9 | 3440 | return (bind_int_variable (var, p, flags)); |
ccc6cda3 JA |
3441 | } |
3442 | ||
7117c2d2 JA |
3443 | /* Do a function binding to a variable. You pass the name and |
3444 | the command to bind to. This conses the name and command. */ | |
3445 | SHELL_VAR * | |
a61ffa78 | 3446 | bind_function (const char *name, COMMAND *value) |
7117c2d2 JA |
3447 | { |
3448 | SHELL_VAR *entry; | |
3449 | ||
3450 | entry = find_function (name); | |
3451 | if (entry == 0) | |
3452 | { | |
3453 | BUCKET_CONTENTS *elt; | |
3454 | ||
3455 | elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH); | |
3456 | entry = new_shell_variable (name); | |
3457 | elt->data = (PTR_T)entry; | |
3458 | } | |
3459 | else | |
3460 | INVALIDATE_EXPORTSTR (entry); | |
3461 | ||
3462 | if (var_isset (entry)) | |
3463 | dispose_command (function_cell (entry)); | |
3464 | ||
3465 | if (value) | |
3466 | var_setfunc (entry, copy_command (value)); | |
3467 | else | |
3468 | var_setfunc (entry, 0); | |
3469 | ||
3470 | VSETATTR (entry, att_function); | |
3471 | ||
3472 | if (mark_modified_vars) | |
3473 | VSETATTR (entry, att_exported); | |
3474 | ||
3475 | VUNSETATTR (entry, att_invisible); /* Just to be sure */ | |
3476 | ||
3477 | if (exported_p (entry)) | |
3478 | array_needs_making = 1; | |
3479 | ||
3480 | #if defined (PROGRAMMABLE_COMPLETION) | |
3481 | set_itemlist_dirty (&it_functions); | |
3482 | #endif | |
3483 | ||
3484 | return (entry); | |
3485 | } | |
3486 | ||
b0c16657 | 3487 | #if defined (DEBUGGER) |
d3a24ed2 | 3488 | /* Bind a function definition, which includes source file and line number |
879213c6 CR |
3489 | information in addition to the command, into the FUNCTION_DEF hash table. |
3490 | If (FLAGS & 1), overwrite any existing definition. If FLAGS == 0, leave | |
3491 | any existing definition alone. */ | |
d3a24ed2 | 3492 | void |
a61ffa78 | 3493 | bind_function_def (const char *name, FUNCTION_DEF *value, int flags) |
d3a24ed2 CR |
3494 | { |
3495 | FUNCTION_DEF *entry; | |
3496 | BUCKET_CONTENTS *elt; | |
5e13499c | 3497 | COMMAND *cmd; |
d3a24ed2 CR |
3498 | |
3499 | entry = find_function_def (name); | |
879213c6 | 3500 | if (entry && (flags & 1)) |
d3a24ed2 CR |
3501 | { |
3502 | dispose_function_def_contents (entry); | |
3503 | entry = copy_function_def_contents (value, entry); | |
3504 | } | |
879213c6 CR |
3505 | else if (entry) |
3506 | return; | |
d3a24ed2 CR |
3507 | else |
3508 | { | |
5e13499c CR |
3509 | cmd = value->command; |
3510 | value->command = 0; | |
d3a24ed2 | 3511 | entry = copy_function_def (value); |
5e13499c | 3512 | value->command = cmd; |
d3a24ed2 CR |
3513 | |
3514 | elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH); | |
3515 | elt->data = (PTR_T *)entry; | |
3516 | } | |
3517 | } | |
b0c16657 | 3518 | #endif /* DEBUGGER */ |
d3a24ed2 | 3519 | |
7117c2d2 JA |
3520 | /* Add STRING, which is of the form foo=bar, to the temporary environment |
3521 | HASH_TABLE (temporary_env). The functions in execute_cmd.c are | |
3522 | responsible for moving the main temporary env to one of the other | |
3523 | temporary environments. The expansion code in subst.c calls this. */ | |
3524 | int | |
b2613ad1 | 3525 | assign_in_env (const WORD_DESC *word, int flags) |
7117c2d2 | 3526 | { |
c111d992 | 3527 | int offset, aflags; |
bddda3d2 | 3528 | char *name, *temp, *value, *newname; |
7117c2d2 | 3529 | SHELL_VAR *var; |
43df7bbb CR |
3530 | const char *string; |
3531 | ||
3532 | string = word->word; | |
7117c2d2 | 3533 | |
c111d992 | 3534 | aflags = 0; |
5e13499c | 3535 | offset = assignment (string, 0); |
bddda3d2 | 3536 | newname = name = savestring (string); |
7117c2d2 JA |
3537 | value = (char *)NULL; |
3538 | ||
3539 | if (name[offset] == '=') | |
3540 | { | |
3541 | name[offset] = 0; | |
3542 | ||
adbaf2b3 | 3543 | /* don't ignore the `+' when assigning temporary environment */ |
d11b8b46 | 3544 | if (name[offset - 1] == '+') |
c111d992 CR |
3545 | { |
3546 | name[offset - 1] = '\0'; | |
3547 | aflags |= ASS_APPEND; | |
3548 | } | |
d11b8b46 | 3549 | |
8d125d8b CR |
3550 | if (legal_identifier (name) == 0) |
3551 | { | |
3552 | sh_invalidid (name); | |
6650b4de | 3553 | free (name); |
8d125d8b CR |
3554 | return (0); |
3555 | } | |
3556 | ||
7117c2d2 | 3557 | var = find_variable (name); |
814e1ff5 | 3558 | if (var == 0) |
bddda3d2 CR |
3559 | { |
3560 | var = find_variable_last_nameref (name, 1); | |
3561 | /* If we're assigning a value to a nameref variable in the temp | |
3562 | environment, and the value of the nameref is valid for assignment, | |
3563 | but the variable does not already exist, assign to the nameref | |
3564 | target and add the target to the temporary environment. This is | |
3565 | what ksh93 does */ | |
8bf3cfef CR |
3566 | /* We use 2 in the call to valid_nameref_value because we don't want |
3567 | to allow array references here at all (newname will be used to | |
3568 | create a variable directly below) */ | |
3569 | if (var && nameref_p (var) && valid_nameref_value (nameref_cell (var), 2)) | |
bddda3d2 CR |
3570 | { |
3571 | newname = nameref_cell (var); | |
3572 | var = 0; /* don't use it for append */ | |
3573 | } | |
3574 | } | |
3575 | else | |
3576 | newname = name_cell (var); /* no-op if not nameref */ | |
814e1ff5 | 3577 | |
7117c2d2 JA |
3578 | if (var && (readonly_p (var) || noassign_p (var))) |
3579 | { | |
3580 | if (readonly_p (var)) | |
3581 | err_readonly (name); | |
3582 | free (name); | |
3583 | return (0); | |
3584 | } | |
7117c2d2 | 3585 | temp = name + offset + 1; |
814e1ff5 | 3586 | |
43df7bbb | 3587 | value = expand_assignment_string_to_string (temp, 0); |
c111d992 CR |
3588 | |
3589 | if (var && (aflags & ASS_APPEND)) | |
3590 | { | |
bddda3d2 CR |
3591 | if (value == 0) |
3592 | { | |
3593 | value = (char *)xmalloc (1); /* like do_assignment_internal */ | |
3594 | value[0] = '\0'; | |
3595 | } | |
c111d992 CR |
3596 | temp = make_variable_value (var, value, aflags); |
3597 | FREE (value); | |
3598 | value = temp; | |
3599 | } | |
7117c2d2 JA |
3600 | } |
3601 | ||
3602 | if (temporary_env == 0) | |
3603 | temporary_env = hash_create (TEMPENV_HASH_BUCKETS); | |
3604 | ||
bddda3d2 | 3605 | var = hash_lookup (newname, temporary_env); |
7117c2d2 | 3606 | if (var == 0) |
bddda3d2 | 3607 | var = make_new_variable (newname, temporary_env); |
7117c2d2 JA |
3608 | else |
3609 | FREE (value_cell (var)); | |
3610 | ||
3611 | if (value == 0) | |
3612 | { | |
bddda3d2 | 3613 | value = (char *)xmalloc (1); /* see above */ |
7117c2d2 JA |
3614 | value[0] = '\0'; |
3615 | } | |
3616 | ||
3617 | var_setvalue (var, value); | |
3618 | var->attributes |= (att_exported|att_tempvar); | |
3619 | var->context = variable_context; /* XXX */ | |
3620 | ||
3621 | INVALIDATE_EXPORTSTR (var); | |
bddda3d2 | 3622 | var->exportstr = mk_env_string (newname, value, 0); |
7117c2d2 JA |
3623 | |
3624 | array_needs_making = 1; | |
3625 | ||
adc6cff5 | 3626 | if (flags) |
11bb038e | 3627 | { |
11bb038e CR |
3628 | if (STREQ (newname, "POSIXLY_CORRECT") || STREQ (newname, "POSIX_PEDANDTIC")) |
3629 | save_posix_options (); /* XXX one level of saving right now */ | |
11bb038e CR |
3630 | stupidly_hack_special_variables (newname); |
3631 | } | |
7117c2d2 JA |
3632 | |
3633 | if (echo_command_at_execute) | |
1d7ecd77 CR |
3634 | /* The Korn shell prints the `+ ' in front of assignment statements, |
3635 | so we do too. */ | |
3636 | xtrace_print_assignment (name, value, 0, 1); | |
7117c2d2 | 3637 | |
5e13499c | 3638 | free (name); |
7117c2d2 JA |
3639 | return 1; |
3640 | } | |
3641 | ||
3642 | /* **************************************************************** */ | |
3643 | /* */ | |
3644 | /* Copying variables */ | |
3645 | /* */ | |
3646 | /* **************************************************************** */ | |
3647 | ||
3648 | #ifdef INCLUDE_UNUSED | |
3649 | /* Copy VAR to a new data structure and return that structure. */ | |
3650 | SHELL_VAR * | |
a61ffa78 | 3651 | copy_variable (SHELL_VAR *var) |
7117c2d2 JA |
3652 | { |
3653 | SHELL_VAR *copy = (SHELL_VAR *)NULL; | |
3654 | ||
3655 | if (var) | |
3656 | { | |
3657 | copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
3658 | ||
3659 | copy->attributes = var->attributes; | |
3660 | copy->name = savestring (var->name); | |
3661 | ||
3662 | if (function_p (var)) | |
3663 | var_setfunc (copy, copy_command (function_cell (var))); | |
3664 | #if defined (ARRAY_VARS) | |
3665 | else if (array_p (var)) | |
fdf670ea CR |
3666 | var_setarray (copy, array_copy (array_cell (var))); |
3667 | else if (assoc_p (var)) | |
3668 | var_setassoc (copy, assoc_copy (assoc_cell (var))); | |
7117c2d2 | 3669 | #endif |
d42cb8c1 CR |
3670 | else if (nameref_cell (var)) /* XXX - nameref */ |
3671 | var_setref (copy, savestring (nameref_cell (var))); | |
3672 | else if (value_cell (var)) /* XXX - nameref */ | |
7117c2d2 JA |
3673 | var_setvalue (copy, savestring (value_cell (var))); |
3674 | else | |
3675 | var_setvalue (copy, (char *)NULL); | |
3676 | ||
3677 | copy->dynamic_value = var->dynamic_value; | |
3678 | copy->assign_func = var->assign_func; | |
3679 | ||
3680 | copy->exportstr = COPY_EXPORTSTR (var); | |
3681 | ||
3682 | copy->context = var->context; | |
3683 | } | |
3684 | return (copy); | |
3685 | } | |
3686 | #endif | |
3687 | ||
3688 | /* **************************************************************** */ | |
3689 | /* */ | |
3690 | /* Deleting and unsetting variables */ | |
3691 | /* */ | |
3692 | /* **************************************************************** */ | |
3693 | ||
726f6388 | 3694 | /* Dispose of the information attached to VAR. */ |
fdf670ea | 3695 | static void |
a61ffa78 | 3696 | dispose_variable_value (SHELL_VAR *var) |
726f6388 | 3697 | { |
726f6388 | 3698 | if (function_p (var)) |
ccc6cda3 JA |
3699 | dispose_command (function_cell (var)); |
3700 | #if defined (ARRAY_VARS) | |
3701 | else if (array_p (var)) | |
7117c2d2 | 3702 | array_dispose (array_cell (var)); |
fdf670ea CR |
3703 | else if (assoc_p (var)) |
3704 | assoc_dispose (assoc_cell (var)); | |
ccc6cda3 | 3705 | #endif |
d42cb8c1 CR |
3706 | else if (nameref_p (var)) |
3707 | FREE (nameref_cell (var)); | |
ccc6cda3 JA |
3708 | else |
3709 | FREE (value_cell (var)); | |
fdf670ea CR |
3710 | } |
3711 | ||
3712 | void | |
a61ffa78 | 3713 | dispose_variable (SHELL_VAR *var) |
fdf670ea CR |
3714 | { |
3715 | if (var == 0) | |
3716 | return; | |
3717 | ||
3718 | if (nofree_p (var) == 0) | |
3719 | dispose_variable_value (var); | |
726f6388 | 3720 | |
bb70624e JA |
3721 | FREE_EXPORTSTR (var); |
3722 | ||
726f6388 JA |
3723 | free (var->name); |
3724 | ||
3725 | if (exported_p (var)) | |
3726 | array_needs_making = 1; | |
3727 | ||
3728 | free (var); | |
3729 | } | |
3730 | ||
d42cb8c1 | 3731 | /* Unset the shell variable referenced by NAME. Unsetting a nameref variable |
87c1f4ec | 3732 | unsets the variable it resolves to but leaves the nameref alone. */ |
ccc6cda3 | 3733 | int |
a61ffa78 | 3734 | unbind_variable (const char *name) |
726f6388 | 3735 | { |
d42cb8c1 CR |
3736 | SHELL_VAR *v, *nv; |
3737 | int r; | |
3738 | ||
3739 | v = var_lookup (name, shell_variables); | |
3740 | nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL; | |
e8652353 CR |
3741 | if (nv == &nameref_maxloop_value) |
3742 | { | |
3743 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
3744 | nv = 0; | |
3745 | } | |
d42cb8c1 | 3746 | |
87c1f4ec | 3747 | r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, shell_variables); |
d42cb8c1 | 3748 | return r; |
7117c2d2 | 3749 | } |
726f6388 | 3750 | |
87c1f4ec CR |
3751 | /* Unbind NAME, where NAME is assumed to be a nameref variable */ |
3752 | int | |
a61ffa78 | 3753 | unbind_nameref (const char *name) |
87c1f4ec CR |
3754 | { |
3755 | SHELL_VAR *v; | |
3756 | ||
3757 | v = var_lookup (name, shell_variables); | |
3758 | if (v && nameref_p (v)) | |
3759 | return makunbound (name, shell_variables); | |
3760 | return 0; | |
3761 | } | |
3762 | ||
bddda3d2 CR |
3763 | /* Unbind the first instance of NAME, whether it's a nameref or not */ |
3764 | int | |
a61ffa78 | 3765 | unbind_variable_noref (const char *name) |
bddda3d2 CR |
3766 | { |
3767 | SHELL_VAR *v; | |
3768 | ||
3769 | v = var_lookup (name, shell_variables); | |
3770 | if (v) | |
3771 | return makunbound (name, shell_variables); | |
3772 | return 0; | |
3773 | } | |
3774 | ||
ebeba874 | 3775 | int |
a61ffa78 | 3776 | unbind_global_variable (const char *name) |
ebeba874 CR |
3777 | { |
3778 | SHELL_VAR *v, *nv; | |
3779 | int r; | |
3780 | ||
3781 | v = var_lookup (name, global_variables); | |
3782 | /* This starts at the current scope, just like find_global_variable; should we | |
3783 | use find_global_variable_nameref here? */ | |
3784 | nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL; | |
e8652353 CR |
3785 | if (nv == &nameref_maxloop_value) |
3786 | { | |
3787 | internal_warning (_("%s: maximum nameref depth (%d) exceeded"), name, NAMEREF_MAX); | |
3788 | nv = 0; | |
3789 | } | |
ebeba874 CR |
3790 | |
3791 | r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, global_variables); | |
3792 | return r; | |
3793 | } | |
3794 | ||
3795 | int | |
a61ffa78 | 3796 | unbind_global_variable_noref (const char *name) |
ebeba874 CR |
3797 | { |
3798 | SHELL_VAR *v; | |
3799 | ||
3800 | v = var_lookup (name, global_variables); | |
3801 | if (v) | |
3802 | return makunbound (name, global_variables); | |
3803 | return 0; | |
3804 | } | |
3805 | ||
3475994a | 3806 | int |
a61ffa78 | 3807 | check_unbind_variable (const char *name) |
3475994a CR |
3808 | { |
3809 | SHELL_VAR *v; | |
3810 | ||
3811 | v = find_variable (name); | |
3812 | if (v && readonly_p (v)) | |
3813 | { | |
bddda3d2 | 3814 | internal_error (_("%s: cannot unset: readonly %s"), name, "variable"); |
fc35c477 CR |
3815 | return -2; |
3816 | } | |
3817 | else if (v && non_unsettable_p (v)) | |
3818 | { | |
3819 | internal_error (_("%s: cannot unset"), name); | |
3820 | return -2; | |
3475994a CR |
3821 | } |
3822 | return (unbind_variable (name)); | |
3823 | } | |
3824 | ||
7117c2d2 JA |
3825 | /* Unset the shell function named NAME. */ |
3826 | int | |
a61ffa78 | 3827 | unbind_func (const char *name) |
7117c2d2 JA |
3828 | { |
3829 | BUCKET_CONTENTS *elt; | |
3830 | SHELL_VAR *func; | |
726f6388 | 3831 | |
7117c2d2 JA |
3832 | elt = hash_remove (name, shell_functions, 0); |
3833 | ||
3834 | if (elt == 0) | |
3835 | return -1; | |
3836 | ||
3837 | #if defined (PROGRAMMABLE_COMPLETION) | |
3838 | set_itemlist_dirty (&it_functions); | |
ccc6cda3 | 3839 | #endif |
7117c2d2 JA |
3840 | |
3841 | func = (SHELL_VAR *)elt->data; | |
3842 | if (func) | |
726f6388 | 3843 | { |
7117c2d2 JA |
3844 | if (exported_p (func)) |
3845 | array_needs_making++; | |
3846 | dispose_variable (func); | |
726f6388 JA |
3847 | } |
3848 | ||
7117c2d2 JA |
3849 | free (elt->key); |
3850 | free (elt); | |
726f6388 | 3851 | |
7117c2d2 | 3852 | return 0; |
726f6388 JA |
3853 | } |
3854 | ||
b0c16657 | 3855 | #if defined (DEBUGGER) |
d3a24ed2 | 3856 | int |
a61ffa78 | 3857 | unbind_function_def (const char *name) |
d3a24ed2 CR |
3858 | { |
3859 | BUCKET_CONTENTS *elt; | |
3860 | FUNCTION_DEF *funcdef; | |
3861 | ||
3862 | elt = hash_remove (name, shell_function_defs, 0); | |
3863 | ||
3864 | if (elt == 0) | |
3865 | return -1; | |
3866 | ||
3867 | funcdef = (FUNCTION_DEF *)elt->data; | |
3868 | if (funcdef) | |
3869 | dispose_function_def (funcdef); | |
3870 | ||
3871 | free (elt->key); | |
3872 | free (elt); | |
3873 | ||
3874 | return 0; | |
3875 | } | |
b0c16657 | 3876 | #endif /* DEBUGGER */ |
d3a24ed2 | 3877 | |
bb579650 | 3878 | int |
a61ffa78 | 3879 | delete_var (const char *name, VAR_CONTEXT *vc) |
bb579650 CR |
3880 | { |
3881 | BUCKET_CONTENTS *elt; | |
3882 | SHELL_VAR *old_var; | |
3883 | VAR_CONTEXT *v; | |
3884 | ||
3885 | for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down) | |
3886 | if (elt = hash_remove (name, v->table, 0)) | |
3887 | break; | |
3888 | ||
3889 | if (elt == 0) | |
3890 | return (-1); | |
3891 | ||
3892 | old_var = (SHELL_VAR *)elt->data; | |
3893 | free (elt->key); | |
3894 | free (elt); | |
3895 | ||
3896 | dispose_variable (old_var); | |
3897 | return (0); | |
3898 | } | |
3899 | ||
726f6388 JA |
3900 | /* Make the variable associated with NAME go away. HASH_LIST is the |
3901 | hash table from which this variable should be deleted (either | |
3902 | shell_variables or shell_functions). | |
3903 | Returns non-zero if the variable couldn't be found. */ | |
ccc6cda3 | 3904 | int |
a61ffa78 | 3905 | makunbound (const char *name, VAR_CONTEXT *vc) |
726f6388 | 3906 | { |
d166f048 | 3907 | BUCKET_CONTENTS *elt, *new_elt; |
7117c2d2 JA |
3908 | SHELL_VAR *old_var; |
3909 | VAR_CONTEXT *v; | |
726f6388 JA |
3910 | char *t; |
3911 | ||
7117c2d2 JA |
3912 | for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down) |
3913 | if (elt = hash_remove (name, v->table, 0)) | |
3914 | break; | |
726f6388 | 3915 | |
d166f048 | 3916 | if (elt == 0) |
726f6388 JA |
3917 | return (-1); |
3918 | ||
3919 | old_var = (SHELL_VAR *)elt->data; | |
726f6388 JA |
3920 | |
3921 | if (old_var && exported_p (old_var)) | |
3922 | array_needs_making++; | |
3923 | ||
ccc6cda3 | 3924 | /* If we're unsetting a local variable and we're still executing inside |
7117c2d2 JA |
3925 | the function, just mark the variable as invisible. The function |
3926 | eventually called by pop_var_context() will clean it up later. This | |
3927 | must be done so that if the variable is subsequently assigned a new | |
3928 | value inside the function, the `local' attribute is still present. | |
3929 | We also need to add it back into the correct hash table. */ | |
bf5b8103 CR |
3930 | if (old_var && local_p (old_var) && |
3931 | (old_var->context == variable_context || (localvar_unset && old_var->context < variable_context))) | |
ccc6cda3 | 3932 | { |
fdf670ea CR |
3933 | if (nofree_p (old_var)) |
3934 | var_setvalue (old_var, (char *)NULL); | |
b954488b | 3935 | #if defined (ARRAY_VARS) |
fdf670ea | 3936 | else if (array_p (old_var)) |
b954488b | 3937 | array_dispose (array_cell (old_var)); |
fdf670ea CR |
3938 | else if (assoc_p (old_var)) |
3939 | assoc_dispose (assoc_cell (old_var)); | |
b954488b | 3940 | #endif |
87c1f4ec CR |
3941 | else if (nameref_p (old_var)) |
3942 | FREE (nameref_cell (old_var)); | |
fdf670ea | 3943 | else |
b954488b | 3944 | FREE (value_cell (old_var)); |
7f7ee0e9 | 3945 | #if 0 |
12d937f9 | 3946 | /* Reset the attributes. Preserve the export attribute if the variable |
fdf670ea CR |
3947 | came from a temporary environment. Make sure it stays local, and |
3948 | make it invisible. */ | |
12d937f9 | 3949 | old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0; |
7f7ee0e9 CR |
3950 | #else /* TAG:bash-5.3 look at this again */ |
3951 | /* Reset the attributes, but preserve the export attribute. | |
3952 | Make sure it stays local, and make it invisible. */ | |
3953 | old_var->attributes = exported_p (old_var) ? att_exported : 0; | |
3954 | #endif | |
12d937f9 | 3955 | VSETATTR (old_var, att_local); |
bb70624e | 3956 | VSETATTR (old_var, att_invisible); |
7117c2d2 | 3957 | var_setvalue (old_var, (char *)NULL); |
bb70624e | 3958 | INVALIDATE_EXPORTSTR (old_var); |
7117c2d2 JA |
3959 | |
3960 | new_elt = hash_insert (savestring (old_var->name), v->table, 0); | |
3961 | new_elt->data = (PTR_T)old_var; | |
ccc6cda3 | 3962 | stupidly_hack_special_variables (old_var->name); |
7117c2d2 | 3963 | |
d166f048 JA |
3964 | free (elt->key); |
3965 | free (elt); | |
ccc6cda3 JA |
3966 | return (0); |
3967 | } | |
3968 | ||
726f6388 JA |
3969 | /* Have to save a copy of name here, because it might refer to |
3970 | old_var->name. If so, stupidly_hack_special_variables will | |
3971 | reference freed memory. */ | |
3972 | t = savestring (name); | |
3973 | ||
3974 | free (elt->key); | |
3975 | free (elt); | |
3976 | ||
3977 | dispose_variable (old_var); | |
3978 | stupidly_hack_special_variables (t); | |
3979 | free (t); | |
7117c2d2 | 3980 | |
726f6388 JA |
3981 | return (0); |
3982 | } | |
3983 | ||
7117c2d2 JA |
3984 | /* Get rid of all of the variables in the current context. */ |
3985 | void | |
a61ffa78 | 3986 | kill_all_local_variables (void) |
726f6388 | 3987 | { |
7117c2d2 JA |
3988 | VAR_CONTEXT *vc; |
3989 | ||
3990 | for (vc = shell_variables; vc; vc = vc->down) | |
3991 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
3992 | break; | |
3993 | if (vc == 0) | |
3994 | return; /* XXX */ | |
726f6388 | 3995 | |
7117c2d2 | 3996 | if (vc->table && vc_haslocals (vc)) |
726f6388 | 3997 | { |
7117c2d2 JA |
3998 | delete_all_variables (vc->table); |
3999 | hash_dispose (vc->table); | |
726f6388 | 4000 | } |
7117c2d2 | 4001 | vc->table = (HASH_TABLE *)NULL; |
726f6388 JA |
4002 | } |
4003 | ||
ccc6cda3 | 4004 | static void |
a61ffa78 | 4005 | free_variable_hash_data (PTR_T data) |
ccc6cda3 | 4006 | { |
7117c2d2 | 4007 | SHELL_VAR *var; |
ccc6cda3 JA |
4008 | |
4009 | var = (SHELL_VAR *)data; | |
7117c2d2 | 4010 | dispose_variable (var); |
ccc6cda3 JA |
4011 | } |
4012 | ||
726f6388 JA |
4013 | /* Delete the entire contents of the hash table. */ |
4014 | void | |
a61ffa78 | 4015 | delete_all_variables (HASH_TABLE *hashed_vars) |
726f6388 | 4016 | { |
7117c2d2 | 4017 | hash_flush (hashed_vars, free_variable_hash_data); |
726f6388 JA |
4018 | } |
4019 | ||
7117c2d2 JA |
4020 | /* **************************************************************** */ |
4021 | /* */ | |
4022 | /* Setting variable attributes */ | |
4023 | /* */ | |
4024 | /* **************************************************************** */ | |
726f6388 | 4025 | |
ccc6cda3 JA |
4026 | #define FIND_OR_MAKE_VARIABLE(name, entry) \ |
4027 | do \ | |
4028 | { \ | |
4029 | entry = find_variable (name); \ | |
4030 | if (!entry) \ | |
4031 | { \ | |
d11b8b46 | 4032 | entry = bind_variable (name, "", 0); \ |
6dc203b8 | 4033 | if (entry) entry->attributes |= att_invisible; \ |
ccc6cda3 JA |
4034 | } \ |
4035 | } \ | |
4036 | while (0) | |
4037 | ||
4038 | /* Make the variable associated with NAME be readonly. | |
726f6388 JA |
4039 | If NAME does not exist yet, create it. */ |
4040 | void | |
a61ffa78 | 4041 | set_var_read_only (char *name) |
726f6388 | 4042 | { |
ccc6cda3 | 4043 | SHELL_VAR *entry; |
726f6388 | 4044 | |
ccc6cda3 | 4045 | FIND_OR_MAKE_VARIABLE (name, entry); |
bb70624e | 4046 | VSETATTR (entry, att_readonly); |
726f6388 JA |
4047 | } |
4048 | ||
cce855bc | 4049 | #ifdef INCLUDE_UNUSED |
ccc6cda3 | 4050 | /* Make the function associated with NAME be readonly. |
726f6388 JA |
4051 | If NAME does not exist, we just punt, like auto_export code below. */ |
4052 | void | |
a61ffa78 | 4053 | set_func_read_only (const char *name) |
726f6388 | 4054 | { |
d166f048 | 4055 | SHELL_VAR *entry; |
726f6388 | 4056 | |
d166f048 | 4057 | entry = find_function (name); |
726f6388 | 4058 | if (entry) |
bb70624e | 4059 | VSETATTR (entry, att_readonly); |
726f6388 JA |
4060 | } |
4061 | ||
4062 | /* Make the variable associated with NAME be auto-exported. | |
4063 | If NAME does not exist yet, create it. */ | |
4064 | void | |
a61ffa78 | 4065 | set_var_auto_export (char *name) |
726f6388 | 4066 | { |
ccc6cda3 | 4067 | SHELL_VAR *entry; |
726f6388 | 4068 | |
ccc6cda3 | 4069 | FIND_OR_MAKE_VARIABLE (name, entry); |
726f6388 JA |
4070 | set_auto_export (entry); |
4071 | } | |
4072 | ||
4073 | /* Make the function associated with NAME be auto-exported. */ | |
4074 | void | |
a61ffa78 | 4075 | set_func_auto_export (const char *name) |
726f6388 | 4076 | { |
ccc6cda3 | 4077 | SHELL_VAR *entry; |
726f6388 | 4078 | |
ccc6cda3 | 4079 | entry = find_function (name); |
726f6388 | 4080 | if (entry) |
ccc6cda3 JA |
4081 | set_auto_export (entry); |
4082 | } | |
cce855bc | 4083 | #endif |
ccc6cda3 | 4084 | |
7117c2d2 JA |
4085 | /* **************************************************************** */ |
4086 | /* */ | |
4087 | /* Creating lists of variables */ | |
4088 | /* */ | |
4089 | /* **************************************************************** */ | |
4090 | ||
4091 | static VARLIST * | |
5b512e11 | 4092 | vlist_alloc (size_t nentries) |
726f6388 | 4093 | { |
7117c2d2 | 4094 | VARLIST *vlist; |
726f6388 | 4095 | |
7117c2d2 JA |
4096 | vlist = (VARLIST *)xmalloc (sizeof (VARLIST)); |
4097 | vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *)); | |
4098 | vlist->list_size = nentries; | |
4099 | vlist->list_len = 0; | |
4100 | vlist->list[0] = (SHELL_VAR *)NULL; | |
726f6388 | 4101 | |
7117c2d2 JA |
4102 | return vlist; |
4103 | } | |
726f6388 | 4104 | |
7117c2d2 | 4105 | static VARLIST * |
5b512e11 | 4106 | vlist_realloc (VARLIST *vlist, size_t n) |
7117c2d2 JA |
4107 | { |
4108 | if (vlist == 0) | |
4109 | return (vlist = vlist_alloc (n)); | |
4110 | if (n > vlist->list_size) | |
726f6388 | 4111 | { |
7117c2d2 JA |
4112 | vlist->list_size = n; |
4113 | vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *)); | |
4114 | } | |
4115 | return vlist; | |
4116 | } | |
726f6388 | 4117 | |
7117c2d2 | 4118 | static void |
a61ffa78 | 4119 | vlist_add (VARLIST *vlist, SHELL_VAR *var, int flags) |
7117c2d2 JA |
4120 | { |
4121 | register int i; | |
ccc6cda3 | 4122 | |
7117c2d2 JA |
4123 | for (i = 0; i < vlist->list_len; i++) |
4124 | if (STREQ (var->name, vlist->list[i]->name)) | |
4125 | break; | |
4126 | if (i < vlist->list_len) | |
4127 | return; | |
4128 | ||
4129 | if (i >= vlist->list_size) | |
4130 | vlist = vlist_realloc (vlist, vlist->list_size + 16); | |
726f6388 | 4131 | |
7117c2d2 JA |
4132 | vlist->list[vlist->list_len++] = var; |
4133 | vlist->list[vlist->list_len] = (SHELL_VAR *)NULL; | |
4134 | } | |
4135 | ||
4136 | /* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the | |
4137 | variables for which FUNCTION returns a non-zero value. A NULL value | |
4138 | for FUNCTION means to use all variables. */ | |
4139 | SHELL_VAR ** | |
a61ffa78 | 4140 | map_over (sh_var_map_func_t *function, VAR_CONTEXT *vc) |
7117c2d2 JA |
4141 | { |
4142 | VAR_CONTEXT *v; | |
4143 | VARLIST *vlist; | |
4144 | SHELL_VAR **ret; | |
5b512e11 | 4145 | size_t nentries; |
7117c2d2 JA |
4146 | |
4147 | for (nentries = 0, v = vc; v; v = v->down) | |
4148 | nentries += HASH_ENTRIES (v->table); | |
4149 | ||
4150 | if (nentries == 0) | |
4151 | return (SHELL_VAR **)NULL; | |
4152 | ||
4153 | vlist = vlist_alloc (nentries); | |
4154 | ||
4155 | for (v = vc; v; v = v->down) | |
4156 | flatten (v->table, function, vlist, 0); | |
4157 | ||
4158 | ret = vlist->list; | |
4159 | free (vlist); | |
4160 | return ret; | |
4161 | } | |
4162 | ||
4163 | SHELL_VAR ** | |
a61ffa78 | 4164 | map_over_funcs (sh_var_map_func_t *function) |
7117c2d2 JA |
4165 | { |
4166 | VARLIST *vlist; | |
4167 | SHELL_VAR **ret; | |
4168 | ||
4169 | if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0) | |
4170 | return ((SHELL_VAR **)NULL); | |
4171 | ||
4172 | vlist = vlist_alloc (HASH_ENTRIES (shell_functions)); | |
4173 | ||
4174 | flatten (shell_functions, function, vlist, 0); | |
4175 | ||
4176 | ret = vlist->list; | |
4177 | free (vlist); | |
4178 | return ret; | |
4179 | } | |
4180 | ||
4181 | /* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those | |
4182 | elements for which FUNC succeeds to VLIST->list. FLAGS is reserved | |
4183 | for future use. Only unique names are added to VLIST. If FUNC is | |
4184 | NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is | |
4185 | NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST | |
4186 | and FUNC are both NULL, nothing happens. */ | |
4187 | static void | |
a61ffa78 | 4188 | flatten (HASH_TABLE *var_hash_table, sh_var_map_func_t *func, VARLIST *vlist, int flags) |
7117c2d2 JA |
4189 | { |
4190 | register int i; | |
4191 | register BUCKET_CONTENTS *tlist; | |
4192 | int r; | |
4193 | SHELL_VAR *var; | |
4194 | ||
4195 | if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0)) | |
4196 | return; | |
4197 | ||
4198 | for (i = 0; i < var_hash_table->nbuckets; i++) | |
4199 | { | |
4200 | for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next) | |
4201 | { | |
4202 | var = (SHELL_VAR *)tlist->data; | |
4203 | ||
4204 | r = func ? (*func) (var) : 1; | |
4205 | if (r && vlist) | |
4206 | vlist_add (vlist, var, flags); | |
4207 | } | |
726f6388 | 4208 | } |
7117c2d2 JA |
4209 | } |
4210 | ||
4211 | void | |
a61ffa78 | 4212 | sort_variables (SHELL_VAR **array) |
7117c2d2 JA |
4213 | { |
4214 | qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp); | |
726f6388 JA |
4215 | } |
4216 | ||
4217 | static int | |
a61ffa78 | 4218 | qsort_var_comp (SHELL_VAR **var1, SHELL_VAR **var2) |
726f6388 | 4219 | { |
7117c2d2 JA |
4220 | int result; |
4221 | ||
4222 | if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0) | |
4223 | result = strcmp ((*var1)->name, (*var2)->name); | |
4224 | ||
4225 | return (result); | |
726f6388 JA |
4226 | } |
4227 | ||
7117c2d2 JA |
4228 | /* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for |
4229 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
ccc6cda3 | 4230 | static SHELL_VAR ** |
a61ffa78 | 4231 | vapply (sh_var_map_func_t *func) |
726f6388 JA |
4232 | { |
4233 | SHELL_VAR **list; | |
4234 | ||
7117c2d2 | 4235 | list = map_over (func, shell_variables); |
d166f048 | 4236 | if (list /* && posixly_correct */) |
726f6388 | 4237 | sort_variables (list); |
7117c2d2 JA |
4238 | return (list); |
4239 | } | |
726f6388 | 4240 | |
7117c2d2 JA |
4241 | /* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for |
4242 | which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */ | |
4243 | static SHELL_VAR ** | |
a61ffa78 | 4244 | fapply (sh_var_map_func_t *func) |
7117c2d2 JA |
4245 | { |
4246 | SHELL_VAR **list; | |
4247 | ||
4248 | list = map_over_funcs (func); | |
4249 | if (list /* && posixly_correct */) | |
4250 | sort_variables (list); | |
726f6388 JA |
4251 | return (list); |
4252 | } | |
4253 | ||
7117c2d2 JA |
4254 | /* Create a NULL terminated array of all the shell variables. */ |
4255 | SHELL_VAR ** | |
a61ffa78 | 4256 | all_shell_variables (void) |
7117c2d2 JA |
4257 | { |
4258 | return (vapply ((sh_var_map_func_t *)NULL)); | |
4259 | } | |
4260 | ||
4261 | /* Create a NULL terminated array of all the shell functions. */ | |
4262 | SHELL_VAR ** | |
a61ffa78 | 4263 | all_shell_functions (void) |
7117c2d2 JA |
4264 | { |
4265 | return (fapply ((sh_var_map_func_t *)NULL)); | |
4266 | } | |
4267 | ||
4268 | static int | |
a61ffa78 | 4269 | visible_var (SHELL_VAR *var) |
7117c2d2 JA |
4270 | { |
4271 | return (invisible_p (var) == 0); | |
4272 | } | |
4273 | ||
726f6388 | 4274 | SHELL_VAR ** |
a61ffa78 | 4275 | all_visible_functions (void) |
726f6388 | 4276 | { |
7117c2d2 | 4277 | return (fapply (visible_var)); |
ccc6cda3 | 4278 | } |
726f6388 | 4279 | |
ccc6cda3 | 4280 | SHELL_VAR ** |
a61ffa78 | 4281 | all_visible_variables (void) |
ccc6cda3 | 4282 | { |
7117c2d2 | 4283 | return (vapply (visible_var)); |
726f6388 JA |
4284 | } |
4285 | ||
ccc6cda3 JA |
4286 | /* Return non-zero if the variable VAR is visible and exported. Array |
4287 | variables cannot be exported. */ | |
726f6388 | 4288 | static int |
a61ffa78 | 4289 | visible_and_exported (SHELL_VAR *var) |
726f6388 | 4290 | { |
ccc6cda3 | 4291 | return (invisible_p (var) == 0 && exported_p (var)); |
726f6388 JA |
4292 | } |
4293 | ||
3a372c75 CR |
4294 | /* Candidate variables for the export environment are either valid variables |
4295 | with the export attribute or invalid variables inherited from the initial | |
4296 | environment and simply passed through. */ | |
4297 | static int | |
a61ffa78 | 4298 | export_environment_candidate (SHELL_VAR *var) |
3a372c75 CR |
4299 | { |
4300 | return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var))); | |
4301 | } | |
4302 | ||
7117c2d2 JA |
4303 | /* Return non-zero if VAR is a local variable in the current context and |
4304 | is exported. */ | |
4305 | static int | |
a61ffa78 | 4306 | local_and_exported (SHELL_VAR *var) |
7117c2d2 JA |
4307 | { |
4308 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var)); | |
4309 | } | |
4310 | ||
bb70624e | 4311 | SHELL_VAR ** |
a61ffa78 | 4312 | all_exported_variables (void) |
bb70624e | 4313 | { |
7117c2d2 JA |
4314 | return (vapply (visible_and_exported)); |
4315 | } | |
bb70624e | 4316 | |
7117c2d2 | 4317 | SHELL_VAR ** |
a61ffa78 | 4318 | local_exported_variables (void) |
7117c2d2 JA |
4319 | { |
4320 | return (vapply (local_and_exported)); | |
4321 | } | |
4322 | ||
4323 | static int | |
a61ffa78 | 4324 | variable_in_context (SHELL_VAR *var) |
0df4ddca CR |
4325 | { |
4326 | return (local_p (var) && var->context == variable_context); | |
4327 | } | |
4328 | ||
4329 | static int | |
a61ffa78 | 4330 | visible_variable_in_context (SHELL_VAR *var) |
7117c2d2 JA |
4331 | { |
4332 | return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context); | |
4333 | } | |
4334 | ||
4335 | SHELL_VAR ** | |
a61ffa78 | 4336 | all_local_variables (int visible_only) |
7117c2d2 JA |
4337 | { |
4338 | VARLIST *vlist; | |
4339 | SHELL_VAR **ret; | |
4340 | VAR_CONTEXT *vc; | |
4341 | ||
4342 | vc = shell_variables; | |
4343 | for (vc = shell_variables; vc; vc = vc->down) | |
4344 | if (vc_isfuncenv (vc) && vc->scope == variable_context) | |
4345 | break; | |
4346 | ||
4347 | if (vc == 0) | |
4348 | { | |
5e13499c | 4349 | internal_error (_("all_local_variables: no function context at current scope")); |
7117c2d2 JA |
4350 | return (SHELL_VAR **)NULL; |
4351 | } | |
4352 | if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0) | |
4353 | return (SHELL_VAR **)NULL; | |
4354 | ||
4355 | vlist = vlist_alloc (HASH_ENTRIES (vc->table)); | |
4356 | ||
0df4ddca CR |
4357 | if (visible_only) |
4358 | flatten (vc->table, visible_variable_in_context, vlist, 0); | |
4359 | else | |
4360 | flatten (vc->table, variable_in_context, vlist, 0); | |
7117c2d2 JA |
4361 | |
4362 | ret = vlist->list; | |
4363 | free (vlist); | |
4364 | if (ret) | |
4365 | sort_variables (ret); | |
4366 | return ret; | |
bb70624e JA |
4367 | } |
4368 | ||
4369 | #if defined (ARRAY_VARS) | |
4370 | /* Return non-zero if the variable VAR is visible and an array. */ | |
4371 | static int | |
a61ffa78 | 4372 | visible_array_vars (SHELL_VAR *var) |
bb70624e | 4373 | { |
61c476d2 | 4374 | return (invisible_p (var) == 0 && (array_p (var) || assoc_p (var))); |
bb70624e JA |
4375 | } |
4376 | ||
4377 | SHELL_VAR ** | |
a61ffa78 | 4378 | all_array_variables (void) |
bb70624e | 4379 | { |
7117c2d2 | 4380 | return (vapply (visible_array_vars)); |
bb70624e JA |
4381 | } |
4382 | #endif /* ARRAY_VARS */ | |
4383 | ||
4384 | char ** | |
a61ffa78 | 4385 | all_variables_matching_prefix (const char *prefix) |
bb70624e JA |
4386 | { |
4387 | SHELL_VAR **varlist; | |
4388 | char **rlist; | |
2e725f73 CR |
4389 | int rind; |
4390 | size_t plen, vind; | |
bb70624e JA |
4391 | |
4392 | plen = STRLEN (prefix); | |
4393 | varlist = all_visible_variables (); | |
4394 | for (vind = 0; varlist && varlist[vind]; vind++) | |
4395 | ; | |
4396 | if (varlist == 0 || vind == 0) | |
4397 | return ((char **)NULL); | |
7117c2d2 | 4398 | rlist = strvec_create (vind + 1); |
bb70624e JA |
4399 | for (vind = rind = 0; varlist[vind]; vind++) |
4400 | { | |
4401 | if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen)) | |
28ef6c31 | 4402 | rlist[rind++] = savestring (varlist[vind]->name); |
bb70624e JA |
4403 | } |
4404 | rlist[rind] = (char *)0; | |
4405 | free (varlist); | |
4406 | ||
4407 | return rlist; | |
4408 | } | |
4409 | ||
7117c2d2 JA |
4410 | /* **************************************************************** */ |
4411 | /* */ | |
4412 | /* Managing temporary variable scopes */ | |
4413 | /* */ | |
4414 | /* **************************************************************** */ | |
4415 | ||
4416 | /* Make variable NAME have VALUE in the temporary environment. */ | |
4417 | static SHELL_VAR * | |
b2613ad1 | 4418 | bind_tempenv_variable (const char *name, const char *value) |
7117c2d2 JA |
4419 | { |
4420 | SHELL_VAR *var; | |
4421 | ||
4422 | var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL; | |
4423 | ||
4424 | if (var) | |
4425 | { | |
4426 | FREE (value_cell (var)); | |
4427 | var_setvalue (var, savestring (value)); | |
4428 | INVALIDATE_EXPORTSTR (var); | |
4429 | } | |
4430 | ||
4431 | return (var); | |
4432 | } | |
4433 | ||
4434 | /* Find a variable in the temporary environment that is named NAME. | |
4435 | Return the SHELL_VAR *, or NULL if not found. */ | |
4436 | SHELL_VAR * | |
a61ffa78 | 4437 | find_tempenv_variable (const char *name) |
7117c2d2 JA |
4438 | { |
4439 | return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL); | |
4440 | } | |
4441 | ||
adc6cff5 CR |
4442 | char **tempvar_list; |
4443 | int tvlist_ind; | |
4444 | ||
96b7e268 CR |
4445 | /* Take a variable from an assignment statement preceding a posix special |
4446 | builtin (including `return') and create a global variable from it. This | |
4447 | is called from merge_temporary_env, which is only called when in posix | |
4448 | mode. */ | |
4449 | static void | |
a61ffa78 | 4450 | push_posix_temp_var (PTR_T data) |
96b7e268 CR |
4451 | { |
4452 | SHELL_VAR *var, *v; | |
2e725f73 | 4453 | #if 0 |
96b7e268 | 4454 | HASH_TABLE *binding_table; |
2e725f73 | 4455 | #endif |
96b7e268 CR |
4456 | |
4457 | var = (SHELL_VAR *)data; | |
4458 | ||
8a9718cf CR |
4459 | /* Just like do_assignment_internal(). This makes assignments preceding |
4460 | special builtins act like standalone assignment statements when in | |
6e501314 CR |
4461 | posix mode, satisfying the posix requirement that this affect the |
4462 | "current execution environment." */ | |
8a9718cf CR |
4463 | v = bind_variable (var->name, value_cell (var), ASS_FORCE|ASS_NOLONGJMP); |
4464 | ||
2dc823ee CR |
4465 | /* XXX - do we need to worry about array variables here? */ |
4466 | ||
2e725f73 | 4467 | #if 0 |
8a9718cf CR |
4468 | /* If this modifies an existing local variable, v->context will be non-zero. |
4469 | If it comes back with v->context == 0, we bound at the global context. | |
4470 | Set binding_table appropriately. It doesn't matter whether it's correct | |
4471 | if the variable is local, only that it's not global_variables->table */ | |
4472 | binding_table = v->context ? shell_variables->table : global_variables->table; | |
2e725f73 | 4473 | #endif |
96b7e268 CR |
4474 | |
4475 | /* global variables are no longer temporary and don't need propagating. */ | |
8f576ade | 4476 | if (v->context == 0) |
8a9718cf CR |
4477 | var->attributes &= ~(att_tempvar|att_propagate); |
4478 | ||
96b7e268 | 4479 | if (v) |
8a9718cf | 4480 | { |
8f576ade CR |
4481 | v->attributes |= var->attributes; /* preserve tempvar attribute if appropriate */ |
4482 | /* If we don't bind a local variable, propagate the value. If we bind a | |
4483 | local variable (the "current execution environment"), keep it as local | |
4484 | and don't propagate it to the calling environment. */ | |
4485 | if (v->context > 0 && local_p (v) == 0) | |
4486 | v->attributes |= att_propagate; | |
4487 | else | |
4488 | v->attributes &= ~att_propagate; | |
8a9718cf | 4489 | } |
96b7e268 CR |
4490 | |
4491 | if (find_special_var (var->name) >= 0) | |
4492 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
4493 | ||
4494 | dispose_variable (var); | |
4495 | } | |
4496 | ||
7117c2d2 | 4497 | /* Push the variable described by (SHELL_VAR *)DATA down to the next |
96b7e268 CR |
4498 | variable context from the temporary environment. This can be called |
4499 | from one context: | |
4500 | 1. propagate_temp_var: which is called to propagate variables in | |
4501 | assignments like `var=value declare -x var' to the surrounding | |
4502 | scope. | |
4503 | ||
4504 | In this case, the variable should have the att_propagate flag set and | |
4505 | we can create variables in the current scope. | |
4506 | */ | |
7117c2d2 | 4507 | static void |
a61ffa78 | 4508 | push_temp_var (PTR_T data) |
7117c2d2 JA |
4509 | { |
4510 | SHELL_VAR *var, *v; | |
4511 | HASH_TABLE *binding_table; | |
4512 | ||
4513 | var = (SHELL_VAR *)data; | |
4514 | ||
4515 | binding_table = shell_variables->table; | |
4516 | if (binding_table == 0) | |
4517 | { | |
4518 | if (shell_variables == global_variables) | |
4519 | /* shouldn't happen */ | |
85ec0778 | 4520 | binding_table = shell_variables->table = global_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
7117c2d2 JA |
4521 | else |
4522 | binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS); | |
4523 | } | |
4524 | ||
124d67cd | 4525 | v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, ASS_FORCE|ASS_NOLONGJMP); |
7117c2d2 | 4526 | |
4e4cebb6 CR |
4527 | #if defined (ARRAY_VARS) |
4528 | if (v && (array_p (var) || assoc_p (var))) | |
4529 | arrayvar_copyval (var, v); | |
4530 | #endif | |
4531 | ||
7117c2d2 | 4532 | /* XXX - should we set the context here? It shouldn't matter because of how |
96b7e268 | 4533 | assign_in_env works, but we do it anyway. */ |
2afeb2af CR |
4534 | if (v) |
4535 | v->context = shell_variables->scope; | |
4536 | ||
7117c2d2 JA |
4537 | if (binding_table == global_variables->table) /* XXX */ |
4538 | var->attributes &= ~(att_tempvar|att_propagate); | |
4539 | else | |
4540 | { | |
2dc823ee | 4541 | var->attributes |= att_propagate; /* XXX - propagate more than once? */ |
7117c2d2 JA |
4542 | if (binding_table == shell_variables->table) |
4543 | shell_variables->flags |= VC_HASTMPVAR; | |
4544 | } | |
bddda3d2 CR |
4545 | if (v) |
4546 | v->attributes |= var->attributes; | |
7117c2d2 | 4547 | |
adc6cff5 CR |
4548 | if (find_special_var (var->name) >= 0) |
4549 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
4550 | ||
7117c2d2 JA |
4551 | dispose_variable (var); |
4552 | } | |
4553 | ||
96b7e268 CR |
4554 | /* Take a variable described by DATA and push it to the surrounding scope if |
4555 | the PROPAGATE attribute is set. That gets set by push_temp_var if we are | |
4556 | taking a variable like `var=value declare -x var' and propagating it to | |
4557 | the enclosing scope. */ | |
7117c2d2 | 4558 | static void |
a61ffa78 | 4559 | propagate_temp_var (PTR_T data) |
7117c2d2 JA |
4560 | { |
4561 | SHELL_VAR *var; | |
4562 | ||
4563 | var = (SHELL_VAR *)data; | |
349e2104 | 4564 | if (tempvar_p (var) && propagate_p (var)) |
7117c2d2 JA |
4565 | push_temp_var (data); |
4566 | else | |
adc6cff5 CR |
4567 | { |
4568 | if (find_special_var (var->name) >= 0) | |
4569 | tempvar_list[tvlist_ind++] = savestring (var->name); | |
4570 | dispose_variable (var); | |
4571 | } | |
7117c2d2 JA |
4572 | } |
4573 | ||
4574 | /* Free the storage used in the hash table for temporary | |
4575 | environment variables. PUSHF is a function to be called | |
4576 | to free each hash table entry. It takes care of pushing variables | |
adc6cff5 CR |
4577 | to previous scopes if appropriate. PUSHF stores names of variables |
4578 | that require special handling (e.g., IFS) on tempvar_list, so this | |
4579 | function can call stupidly_hack_special_variables on all the | |
4580 | variables in the list when the temporary hash table is destroyed. */ | |
7117c2d2 | 4581 | static void |
a61ffa78 | 4582 | dispose_temporary_env (sh_free_func_t *pushf) |
7117c2d2 | 4583 | { |
adc6cff5 | 4584 | int i; |
8a9718cf | 4585 | HASH_TABLE *disposer; |
adc6cff5 CR |
4586 | |
4587 | tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1); | |
4588 | tempvar_list[tvlist_ind = 0] = 0; | |
8a9718cf CR |
4589 | |
4590 | disposer = temporary_env; | |
fdf670ea | 4591 | temporary_env = (HASH_TABLE *)NULL; |
7117c2d2 | 4592 | |
8a9718cf CR |
4593 | hash_flush (disposer, pushf); |
4594 | hash_dispose (disposer); | |
4595 | ||
adc6cff5 CR |
4596 | tempvar_list[tvlist_ind] = 0; |
4597 | ||
7117c2d2 JA |
4598 | array_needs_making = 1; |
4599 | ||
adc6cff5 CR |
4600 | for (i = 0; i < tvlist_ind; i++) |
4601 | stupidly_hack_special_variables (tempvar_list[i]); | |
4602 | ||
4603 | strvec_dispose (tempvar_list); | |
4604 | tempvar_list = 0; | |
4605 | tvlist_ind = 0; | |
7117c2d2 JA |
4606 | } |
4607 | ||
4608 | void | |
a61ffa78 | 4609 | dispose_used_env_vars (void) |
7117c2d2 JA |
4610 | { |
4611 | if (temporary_env) | |
d3ad40de CR |
4612 | { |
4613 | dispose_temporary_env (propagate_temp_var); | |
4614 | maybe_make_export_env (); | |
4615 | } | |
7117c2d2 JA |
4616 | } |
4617 | ||
4618 | /* Take all of the shell variables in the temporary environment HASH_TABLE | |
96b7e268 CR |
4619 | and make shell variables from them at the current variable context. |
4620 | Right now, this is only called in Posix mode to implement the historical | |
4621 | accident of creating global variables from assignment statements preceding | |
4622 | special builtins, but we check in case this acquires another caller later. */ | |
7117c2d2 | 4623 | void |
a61ffa78 | 4624 | merge_temporary_env (void) |
7117c2d2 JA |
4625 | { |
4626 | if (temporary_env) | |
96b7e268 | 4627 | dispose_temporary_env (posixly_correct ? push_posix_temp_var : push_temp_var); |
7117c2d2 JA |
4628 | } |
4629 | ||
d11d7984 CR |
4630 | /* Temporary function to use if we want to separate function and special |
4631 | builtin behavior. */ | |
4632 | void | |
a61ffa78 | 4633 | merge_function_temporary_env (void) |
d11d7984 CR |
4634 | { |
4635 | if (temporary_env) | |
4636 | dispose_temporary_env (push_temp_var); | |
4637 | } | |
4638 | ||
8742afef | 4639 | void |
a61ffa78 | 4640 | flush_temporary_env (void) |
8742afef CR |
4641 | { |
4642 | if (temporary_env) | |
4643 | { | |
4644 | hash_flush (temporary_env, free_variable_hash_data); | |
4645 | hash_dispose (temporary_env); | |
4646 | temporary_env = (HASH_TABLE *)NULL; | |
4647 | } | |
4648 | } | |
4649 | ||
7117c2d2 JA |
4650 | /* **************************************************************** */ |
4651 | /* */ | |
4652 | /* Creating and manipulating the environment */ | |
4653 | /* */ | |
4654 | /* **************************************************************** */ | |
4655 | ||
bb70624e | 4656 | static inline char * |
a61ffa78 | 4657 | mk_env_string (const char *name, const char *value, int attributes) |
bb70624e | 4658 | { |
30595b57 | 4659 | size_t name_len, value_len; |
1a5fa30b | 4660 | char *p, *q, *t; |
d70b5339 | 4661 | int isfunc, isarray; |
bb70624e JA |
4662 | |
4663 | name_len = strlen (name); | |
4664 | value_len = STRLEN (value); | |
30595b57 | 4665 | |
d70b5339 CR |
4666 | isfunc = attributes & att_function; |
4667 | #if defined (ARRAY_VARS) && defined (ARRAY_EXPORT) | |
4668 | isarray = attributes & (att_array|att_assoc); | |
4669 | #endif | |
4670 | ||
30595b57 CR |
4671 | /* If we are exporting a shell function, construct the encoded function |
4672 | name. */ | |
4673 | if (isfunc && value) | |
4674 | { | |
4675 | p = (char *)xmalloc (BASHFUNC_PREFLEN + name_len + BASHFUNC_SUFFLEN + value_len + 2); | |
4676 | q = p; | |
4677 | memcpy (q, BASHFUNC_PREFIX, BASHFUNC_PREFLEN); | |
4678 | q += BASHFUNC_PREFLEN; | |
4679 | memcpy (q, name, name_len); | |
4680 | q += name_len; | |
4681 | memcpy (q, BASHFUNC_SUFFIX, BASHFUNC_SUFFLEN); | |
4682 | q += BASHFUNC_SUFFLEN; | |
4683 | } | |
d70b5339 CR |
4684 | #if defined (ARRAY_VARS) && defined (ARRAY_EXPORT) |
4685 | else if (isarray && value) | |
4686 | { | |
4687 | if (attributes & att_assoc) | |
4688 | p = (char *)xmalloc (BASHASSOC_PREFLEN + name_len + BASHASSOC_SUFFLEN + value_len + 2); | |
4689 | else | |
4690 | p = (char *)xmalloc (BASHARRAY_PREFLEN + name_len + BASHARRAY_SUFFLEN + value_len + 2); | |
4691 | q = p; | |
4692 | if (attributes & att_assoc) | |
4693 | { | |
4694 | memcpy (q, BASHASSOC_PREFIX, BASHASSOC_PREFLEN); | |
4695 | q += BASHASSOC_PREFLEN; | |
4696 | } | |
4697 | else | |
4698 | { | |
4699 | memcpy (q, BASHARRAY_PREFIX, BASHARRAY_PREFLEN); | |
4700 | q += BASHARRAY_PREFLEN; | |
4701 | } | |
4702 | memcpy (q, name, name_len); | |
4703 | q += name_len; | |
4704 | /* These are actually the same currently */ | |
4705 | if (attributes & att_assoc) | |
4706 | { | |
4707 | memcpy (q, BASHASSOC_SUFFIX, BASHASSOC_SUFFLEN); | |
4708 | q += BASHARRAY_SUFFLEN; | |
4709 | } | |
4710 | else | |
4711 | { | |
4712 | memcpy (q, BASHARRAY_SUFFIX, BASHARRAY_SUFFLEN); | |
4713 | q += BASHARRAY_SUFFLEN; | |
4714 | } | |
4715 | } | |
4716 | #endif | |
30595b57 CR |
4717 | else |
4718 | { | |
4719 | p = (char *)xmalloc (2 + name_len + value_len); | |
4720 | memcpy (p, name, name_len); | |
4721 | q = p + name_len; | |
4722 | } | |
4723 | ||
4724 | q[0] = '='; | |
bb70624e | 4725 | if (value && *value) |
1a5fa30b CR |
4726 | { |
4727 | if (isfunc) | |
4728 | { | |
4729 | t = dequote_escapes (value); | |
4730 | value_len = STRLEN (t); | |
4731 | memcpy (q + 1, t, value_len + 1); | |
4732 | free (t); | |
4733 | } | |
4734 | else | |
4735 | memcpy (q + 1, value, value_len + 1); | |
4736 | } | |
bb70624e | 4737 | else |
30595b57 CR |
4738 | q[1] = '\0'; |
4739 | ||
bb70624e JA |
4740 | return (p); |
4741 | } | |
4742 | ||
f73dda09 | 4743 | #ifdef DEBUG |
bb70624e JA |
4744 | /* Debugging */ |
4745 | static int | |
a61ffa78 | 4746 | valid_exportstr (SHELL_VAR *v) |
bb70624e JA |
4747 | { |
4748 | char *s; | |
4749 | ||
4750 | s = v->exportstr; | |
824dfe68 CR |
4751 | if (s == 0) |
4752 | { | |
4753 | internal_error (_("%s has null exportstr"), v->name); | |
4754 | return (0); | |
4755 | } | |
f73dda09 | 4756 | if (legal_variable_starter ((unsigned char)*s) == 0) |
bb70624e | 4757 | { |
5e13499c | 4758 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
4759 | return (0); |
4760 | } | |
4761 | for (s = v->exportstr + 1; s && *s; s++) | |
4762 | { | |
4763 | if (*s == '=') | |
28ef6c31 | 4764 | break; |
f73dda09 | 4765 | if (legal_variable_char ((unsigned char)*s) == 0) |
bb70624e | 4766 | { |
5e13499c | 4767 | internal_error (_("invalid character %d in exportstr for %s"), *s, v->name); |
bb70624e JA |
4768 | return (0); |
4769 | } | |
4770 | } | |
4771 | if (*s != '=') | |
4772 | { | |
5e13499c | 4773 | internal_error (_("no `=' in exportstr for %s"), v->name); |
bb70624e JA |
4774 | return (0); |
4775 | } | |
4776 | return (1); | |
4777 | } | |
f73dda09 | 4778 | #endif |
bb70624e | 4779 | |
d70b5339 CR |
4780 | #if defined (ARRAY_VARS) |
4781 | # define USE_EXPORTSTR (value == var->exportstr && array_p (var) == 0 && assoc_p (var) == 0) | |
4782 | #else | |
4783 | # define USE_EXPORTSTR (value == var->exportstr) | |
4784 | #endif | |
4785 | ||
7117c2d2 | 4786 | static char ** |
a61ffa78 | 4787 | make_env_array_from_var_list (SHELL_VAR **vars) |
726f6388 JA |
4788 | { |
4789 | register int i, list_index; | |
4790 | register SHELL_VAR *var; | |
ccc6cda3 | 4791 | char **list, *value; |
726f6388 | 4792 | |
7117c2d2 | 4793 | list = strvec_create ((1 + strvec_len ((char **)vars))); |
bb70624e | 4794 | |
726f6388 JA |
4795 | for (i = 0, list_index = 0; var = vars[i]; i++) |
4796 | { | |
28ef6c31 JA |
4797 | #if defined (__CYGWIN__) |
4798 | /* We don't use the exportstr stuff on Cygwin at all. */ | |
4799 | INVALIDATE_EXPORTSTR (var); | |
bb70624e | 4800 | #endif |
b90cb5a2 CR |
4801 | |
4802 | /* If the value is generated dynamically, generate it here. */ | |
4803 | if (regen_p (var) && var->dynamic_value) | |
4804 | { | |
4805 | var = (*(var->dynamic_value)) (var); | |
4806 | INVALIDATE_EXPORTSTR (var); | |
4807 | } | |
4808 | ||
28ef6c31 JA |
4809 | if (var->exportstr) |
4810 | value = var->exportstr; | |
bb70624e | 4811 | else if (function_p (var)) |
ccc6cda3 JA |
4812 | value = named_function_string ((char *)NULL, function_cell (var), 0); |
4813 | #if defined (ARRAY_VARS) | |
4814 | else if (array_p (var)) | |
200aed9a | 4815 | # if ARRAY_EXPORT |
85ec0778 | 4816 | value = array_to_assign (array_cell (var), 0); |
ccc6cda3 JA |
4817 | # else |
4818 | continue; /* XXX array vars cannot yet be exported */ | |
200aed9a | 4819 | # endif /* ARRAY_EXPORT */ |
fdf670ea | 4820 | else if (assoc_p (var)) |
d70b5339 | 4821 | # if ARRAY_EXPORT |
85ec0778 | 4822 | value = assoc_to_assign (assoc_cell (var), 0); |
fdf670ea CR |
4823 | # else |
4824 | continue; /* XXX associative array vars cannot yet be exported */ | |
d70b5339 | 4825 | # endif /* ARRAY_EXPORT */ |
ccc6cda3 | 4826 | #endif |
726f6388 JA |
4827 | else |
4828 | value = value_cell (var); | |
4829 | ||
4830 | if (value) | |
4831 | { | |
bb70624e JA |
4832 | /* Gee, I'd like to get away with not using savestring() if we're |
4833 | using the cached exportstr... */ | |
4834 | list[list_index] = USE_EXPORTSTR ? savestring (value) | |
d70b5339 CR |
4835 | : mk_env_string (var->name, value, var->attributes); |
4836 | ||
7117c2d2 JA |
4837 | if (USE_EXPORTSTR == 0) |
4838 | SAVE_EXPORTSTR (var, list[list_index]); | |
4839 | ||
726f6388 | 4840 | list_index++; |
bb70624e JA |
4841 | #undef USE_EXPORTSTR |
4842 | ||
d70b5339 | 4843 | #if defined (ARRAY_VARS) && defined (ARRAY_EXPORT) |
fdf670ea | 4844 | if (array_p (var) || assoc_p (var)) |
ccc6cda3 JA |
4845 | free (value); |
4846 | #endif | |
726f6388 JA |
4847 | } |
4848 | } | |
4849 | ||
726f6388 JA |
4850 | list[list_index] = (char *)NULL; |
4851 | return (list); | |
4852 | } | |
4853 | ||
7117c2d2 JA |
4854 | /* Make an array of assignment statements from the hash table |
4855 | HASHED_VARS which contains SHELL_VARs. Only visible, exported | |
4856 | variables are eligible. */ | |
4857 | static char ** | |
a61ffa78 | 4858 | make_var_export_array (VAR_CONTEXT *vcxt) |
726f6388 | 4859 | { |
7117c2d2 JA |
4860 | char **list; |
4861 | SHELL_VAR **vars; | |
726f6388 | 4862 | |
3a372c75 | 4863 | #if 0 |
7117c2d2 | 4864 | vars = map_over (visible_and_exported, vcxt); |
3a372c75 CR |
4865 | #else |
4866 | vars = map_over (export_environment_candidate, vcxt); | |
4867 | #endif | |
726f6388 | 4868 | |
7117c2d2 JA |
4869 | if (vars == 0) |
4870 | return (char **)NULL; | |
ccc6cda3 | 4871 | |
7117c2d2 | 4872 | list = make_env_array_from_var_list (vars); |
ccc6cda3 | 4873 | |
7117c2d2 JA |
4874 | free (vars); |
4875 | return (list); | |
ccc6cda3 JA |
4876 | } |
4877 | ||
7117c2d2 | 4878 | static char ** |
a61ffa78 | 4879 | make_func_export_array (void) |
726f6388 | 4880 | { |
7117c2d2 JA |
4881 | char **list; |
4882 | SHELL_VAR **vars; | |
ccc6cda3 | 4883 | |
7117c2d2 JA |
4884 | vars = map_over_funcs (visible_and_exported); |
4885 | if (vars == 0) | |
4886 | return (char **)NULL; | |
726f6388 | 4887 | |
7117c2d2 | 4888 | list = make_env_array_from_var_list (vars); |
28ef6c31 | 4889 | |
7117c2d2 JA |
4890 | free (vars); |
4891 | return (list); | |
bb70624e JA |
4892 | } |
4893 | ||
d166f048 JA |
4894 | /* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */ |
4895 | #define add_to_export_env(envstr,do_alloc) \ | |
4896 | do \ | |
4897 | { \ | |
4898 | if (export_env_index >= (export_env_size - 1)) \ | |
4899 | { \ | |
4900 | export_env_size += 16; \ | |
7117c2d2 | 4901 | export_env = strvec_resize (export_env, export_env_size); \ |
0f445e6c | 4902 | environ = export_env; \ |
d166f048 JA |
4903 | } \ |
4904 | export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \ | |
4905 | export_env[export_env_index] = (char *)NULL; \ | |
4906 | } while (0) | |
4907 | ||
3a7c642e | 4908 | /* Add ASSIGN to EXPORT_ENV, or supersede a previous assignment in the |
d166f048 | 4909 | array with the same left-hand side. Return the new EXPORT_ENV. */ |
726f6388 | 4910 | char ** |
a61ffa78 | 4911 | add_or_supercede_exported_var (char *assign, int do_alloc) |
726f6388 JA |
4912 | { |
4913 | register int i; | |
d166f048 | 4914 | int equal_offset; |
726f6388 | 4915 | |
5e13499c | 4916 | equal_offset = assignment (assign, 0); |
d166f048 JA |
4917 | if (equal_offset == 0) |
4918 | return (export_env); | |
726f6388 | 4919 | |
7117c2d2 JA |
4920 | /* If this is a function, then only supersede the function definition. |
4921 | We do this by including the `=() {' in the comparison, like | |
4922 | initialize_shell_variables does. */ | |
4923 | if (assign[equal_offset + 1] == '(' && | |
4924 | strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */ | |
4925 | equal_offset += 4; | |
726f6388 | 4926 | |
d166f048 | 4927 | for (i = 0; i < export_env_index; i++) |
726f6388 | 4928 | { |
d166f048 | 4929 | if (STREQN (assign, export_env[i], equal_offset + 1)) |
726f6388 | 4930 | { |
d166f048 JA |
4931 | free (export_env[i]); |
4932 | export_env[i] = do_alloc ? savestring (assign) : assign; | |
4933 | return (export_env); | |
726f6388 JA |
4934 | } |
4935 | } | |
d166f048 JA |
4936 | add_to_export_env (assign, do_alloc); |
4937 | return (export_env); | |
726f6388 JA |
4938 | } |
4939 | ||
7117c2d2 | 4940 | static void |
a61ffa78 | 4941 | add_temp_array_to_env (char **temp_array, int do_alloc, int do_supercede) |
7117c2d2 JA |
4942 | { |
4943 | register int i; | |
4944 | ||
4945 | if (temp_array == 0) | |
4946 | return; | |
4947 | ||
4948 | for (i = 0; temp_array[i]; i++) | |
4949 | { | |
4950 | if (do_supercede) | |
4951 | export_env = add_or_supercede_exported_var (temp_array[i], do_alloc); | |
4952 | else | |
4953 | add_to_export_env (temp_array[i], do_alloc); | |
4954 | } | |
4955 | ||
4956 | free (temp_array); | |
4957 | } | |
4958 | ||
d166f048 | 4959 | /* Make the environment array for the command about to be executed, if the |
726f6388 JA |
4960 | array needs making. Otherwise, do nothing. If a shell action could |
4961 | change the array that commands receive for their environment, then the | |
7117c2d2 JA |
4962 | code should `array_needs_making++'. |
4963 | ||
4964 | The order to add to the array is: | |
4965 | temporary_env | |
4966 | list of var contexts whose head is shell_variables | |
4967 | shell_functions | |
4968 | ||
4969 | This is the shell variable lookup order. We add only new variable | |
4970 | names at each step, which allows local variables and variables in | |
4971 | the temporary environments to shadow variables in the global (or | |
4972 | any previous) scope. | |
4973 | */ | |
4974 | ||
4975 | static int | |
a61ffa78 | 4976 | n_shell_variables (void) |
7117c2d2 JA |
4977 | { |
4978 | VAR_CONTEXT *vc; | |
4979 | int n; | |
4980 | ||
4981 | for (n = 0, vc = shell_variables; vc; vc = vc->down) | |
4982 | n += HASH_ENTRIES (vc->table); | |
4983 | return n; | |
4984 | } | |
4985 | ||
9c2db999 | 4986 | int |
a61ffa78 | 4987 | chkexport (char *name) |
9c2db999 CR |
4988 | { |
4989 | SHELL_VAR *v; | |
4990 | ||
4991 | v = find_variable (name); | |
40647963 | 4992 | if (v && exported_p (v)) |
9c2db999 CR |
4993 | { |
4994 | array_needs_making = 1; | |
4995 | maybe_make_export_env (); | |
4996 | return 1; | |
4997 | } | |
4998 | return 0; | |
4999 | } | |
5000 | ||
726f6388 | 5001 | void |
a61ffa78 | 5002 | maybe_make_export_env (void) |
726f6388 | 5003 | { |
726f6388 | 5004 | register char **temp_array; |
d166f048 | 5005 | int new_size; |
8d125d8b | 5006 | VAR_CONTEXT *tcxt, *icxt; |
726f6388 JA |
5007 | |
5008 | if (array_needs_making) | |
5009 | { | |
5010 | if (export_env) | |
fdf670ea | 5011 | strvec_flush (export_env); |
d166f048 JA |
5012 | |
5013 | /* Make a guess based on how many shell variables and functions we | |
5014 | have. Since there will always be array variables, and array | |
5015 | variables are not (yet) exported, this will always be big enough | |
7117c2d2 JA |
5016 | for the exported variables and functions. */ |
5017 | new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 + | |
8d125d8b | 5018 | HASH_ENTRIES (temporary_env) + HASH_ENTRIES (invalid_env); |
d166f048 JA |
5019 | if (new_size > export_env_size) |
5020 | { | |
5021 | export_env_size = new_size; | |
7117c2d2 | 5022 | export_env = strvec_resize (export_env, export_env_size); |
0f445e6c | 5023 | environ = export_env; |
d166f048 JA |
5024 | } |
5025 | export_env[export_env_index = 0] = (char *)NULL; | |
726f6388 | 5026 | |
3a372c75 | 5027 | /* Make a dummy variable context from the temporary_env, stick it on |
fdf670ea CR |
5028 | the front of shell_variables, call make_var_export_array on the |
5029 | whole thing to flatten it, and convert the list of SHELL_VAR *s | |
5030 | to the form needed by the environment. */ | |
7117c2d2 | 5031 | if (temporary_env) |
fdf670ea CR |
5032 | { |
5033 | tcxt = new_var_context ((char *)NULL, 0); | |
5034 | tcxt->table = temporary_env; | |
5035 | tcxt->down = shell_variables; | |
5036 | } | |
7117c2d2 | 5037 | else |
fdf670ea | 5038 | tcxt = shell_variables; |
8d125d8b CR |
5039 | |
5040 | if (invalid_env) | |
5041 | { | |
5042 | icxt = new_var_context ((char *)NULL, 0); | |
5043 | icxt->table = invalid_env; | |
5044 | icxt->down = tcxt; | |
5045 | } | |
5046 | else | |
5047 | icxt = tcxt; | |
7117c2d2 | 5048 | |
8d125d8b | 5049 | temp_array = make_var_export_array (icxt); |
d166f048 | 5050 | if (temp_array) |
7117c2d2 JA |
5051 | add_temp_array_to_env (temp_array, 0, 0); |
5052 | ||
8d125d8b CR |
5053 | if (icxt != tcxt) |
5054 | free (icxt); | |
5055 | ||
7117c2d2 | 5056 | if (tcxt != shell_variables) |
fdf670ea | 5057 | free (tcxt); |
726f6388 | 5058 | |
f73dda09 JA |
5059 | #if defined (RESTRICTED_SHELL) |
5060 | /* Restricted shells may not export shell functions. */ | |
7117c2d2 | 5061 | temp_array = restricted ? (char **)0 : make_func_export_array (); |
f73dda09 | 5062 | #else |
7117c2d2 | 5063 | temp_array = make_func_export_array (); |
f73dda09 | 5064 | #endif |
d166f048 | 5065 | if (temp_array) |
7117c2d2 | 5066 | add_temp_array_to_env (temp_array, 0, 0); |
726f6388 JA |
5067 | |
5068 | array_needs_making = 0; | |
5069 | } | |
5070 | } | |
5071 | ||
b72432fd JA |
5072 | /* This is an efficiency hack. PWD and OLDPWD are auto-exported, so |
5073 | we will need to remake the exported environment every time we | |
5074 | change directories. `_' is always put into the environment for | |
5075 | every external command, so without special treatment it will always | |
5076 | cause the environment to be remade. | |
5077 | ||
5078 | If there is no other reason to make the exported environment, we can | |
5079 | just update the variables in place and mark the exported environment | |
5080 | as no longer needing a remake. */ | |
5081 | void | |
a61ffa78 | 5082 | update_export_env_inplace (char *env_prefix, int preflen, char *value) |
b72432fd JA |
5083 | { |
5084 | char *evar; | |
5085 | ||
f73dda09 | 5086 | evar = (char *)xmalloc (STRLEN (value) + preflen + 1); |
b72432fd JA |
5087 | strcpy (evar, env_prefix); |
5088 | if (value) | |
5089 | strcpy (evar + preflen, value); | |
5090 | export_env = add_or_supercede_exported_var (evar, 0); | |
5091 | } | |
5092 | ||
726f6388 JA |
5093 | /* We always put _ in the environment as the name of this command. */ |
5094 | void | |
a61ffa78 | 5095 | put_command_name_into_env (char *command_name) |
726f6388 | 5096 | { |
b72432fd | 5097 | update_export_env_inplace ("_=", 2, command_name); |
726f6388 JA |
5098 | } |
5099 | ||
7117c2d2 JA |
5100 | /* **************************************************************** */ |
5101 | /* */ | |
5102 | /* Managing variable contexts */ | |
5103 | /* */ | |
5104 | /* **************************************************************** */ | |
5105 | ||
5106 | /* Allocate and return a new variable context with NAME and FLAGS. | |
5107 | NAME can be NULL. */ | |
726f6388 | 5108 | |
7117c2d2 | 5109 | VAR_CONTEXT * |
a61ffa78 | 5110 | new_var_context (char *name, int flags) |
7117c2d2 JA |
5111 | { |
5112 | VAR_CONTEXT *vc; | |
5113 | ||
5114 | vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT)); | |
5115 | vc->name = name ? savestring (name) : (char *)NULL; | |
5116 | vc->scope = variable_context; | |
5117 | vc->flags = flags; | |
5118 | ||
5119 | vc->up = vc->down = (VAR_CONTEXT *)NULL; | |
5120 | vc->table = (HASH_TABLE *)NULL; | |
5121 | ||
5122 | return vc; | |
5123 | } | |
5124 | ||
5125 | /* Free a variable context and its data, including the hash table. Dispose | |
5126 | all of the variables. */ | |
5127 | void | |
a61ffa78 | 5128 | dispose_var_context (VAR_CONTEXT *vc) |
7117c2d2 JA |
5129 | { |
5130 | FREE (vc->name); | |
5131 | ||
5132 | if (vc->table) | |
5133 | { | |
5134 | delete_all_variables (vc->table); | |
5135 | hash_dispose (vc->table); | |
5136 | } | |
5137 | ||
5138 | free (vc); | |
5139 | } | |
5140 | ||
5141 | /* Set VAR's scope level to the current variable context. */ | |
5142 | static int | |
a61ffa78 | 5143 | set_context (SHELL_VAR *var) |
7117c2d2 JA |
5144 | { |
5145 | return (var->context = variable_context); | |
5146 | } | |
5147 | ||
5148 | /* Make a new variable context with NAME and FLAGS and a HASH_TABLE of | |
5149 | temporary variables, and push it onto shell_variables. This is | |
5150 | for shell functions. */ | |
5151 | VAR_CONTEXT * | |
a61ffa78 | 5152 | push_var_context (char *name, int flags, HASH_TABLE *tempvars) |
7117c2d2 JA |
5153 | { |
5154 | VAR_CONTEXT *vc; | |
c21b3727 CR |
5155 | int posix_func_behavior; |
5156 | ||
5157 | /* As of IEEE Std 1003.1-2017, assignment statements preceding shell | |
5158 | functions no longer behave like assignment statements preceding | |
5159 | special builtins, and do not persist in the current shell environment. | |
5160 | This is austin group interp #654, though nobody implements it yet. */ | |
c87bb0a8 | 5161 | posix_func_behavior = 0; |
7117c2d2 JA |
5162 | |
5163 | vc = new_var_context (name, flags); | |
c21b3727 CR |
5164 | /* Posix interp 1009, temporary assignments preceding function calls modify |
5165 | the current environment *before* the command is executed. */ | |
5c5c7523 | 5166 | if (posix_func_behavior && (flags & VC_FUNCENV) && tempvars == temporary_env) |
c21b3727 CR |
5167 | merge_temporary_env (); |
5168 | else if (tempvars) | |
7117c2d2 | 5169 | { |
c21b3727 | 5170 | vc->table = tempvars; |
7117c2d2 JA |
5171 | /* Have to do this because the temp environment was created before |
5172 | variable_context was incremented. */ | |
6e501314 | 5173 | /* XXX - only need to do it if flags&VC_FUNCENV */ |
7117c2d2 JA |
5174 | flatten (tempvars, set_context, (VARLIST *)NULL, 0); |
5175 | vc->flags |= VC_HASTMPVAR; | |
5176 | } | |
5177 | vc->down = shell_variables; | |
5178 | shell_variables->up = vc; | |
5179 | ||
5180 | return (shell_variables = vc); | |
5181 | } | |
5182 | ||
96b7e268 CR |
5183 | /* This can be called from one of two code paths: |
5184 | 1. pop_scope, which implements the posix rules for propagating variable | |
c87bb0a8 | 5185 | assignments preceding special builtins to the surrounding scope |
2dc823ee | 5186 | (push_builtin_var -- isbltin == 1); |
96b7e268 CR |
5187 | 2. pop_var_context, which is called from pop_context and implements the |
5188 | posix rules for propagating variable assignments preceding function | |
2dc823ee | 5189 | calls to the surrounding scope (push_func_var -- isbltin == 0) |
96b7e268 CR |
5190 | |
5191 | It takes variables out of a temporary environment hash table. We take the | |
8d125d8b | 5192 | variable in data. |
96b7e268 | 5193 | */ |
c87bb0a8 CR |
5194 | |
5195 | static inline void | |
a61ffa78 | 5196 | push_posix_tempvar_internal (SHELL_VAR *var, int isbltin) |
7117c2d2 | 5197 | { |
c87bb0a8 | 5198 | SHELL_VAR *v; |
8d125d8b | 5199 | int posix_var_behavior; |
7117c2d2 | 5200 | |
2afeb2af CR |
5201 | /* As of IEEE Std 1003.1-2017, assignment statements preceding shell |
5202 | functions no longer behave like assignment statements preceding | |
8d125d8b CR |
5203 | special builtins, and do not persist in the current shell environment. |
5204 | This is austin group interp #654, though nobody implements it yet. */ | |
c87bb0a8 | 5205 | posix_var_behavior = posixly_correct && isbltin; |
2dc823ee CR |
5206 | v = 0; |
5207 | ||
8f50a023 | 5208 | if (local_p (var) && STREQ (var->name, "-")) |
e6983002 CR |
5209 | { |
5210 | set_current_options (value_cell (var)); | |
5211 | set_shellopts (); | |
5212 | } | |
4e4cebb6 | 5213 | |
2dc823ee CR |
5214 | /* This takes variable assignments preceding special builtins that can execute |
5215 | multiple commands (source, eval, etc.) and performs the equivalent of | |
5216 | an assignment statement to modify the closest enclosing variable (the | |
5217 | posix "current execution environment"). This makes the behavior the same | |
5218 | as push_posix_temp_var; but the circumstances of calling are slightly | |
5219 | different. */ | |
5220 | else if (tempvar_p (var) && posix_var_behavior) | |
5221 | { | |
5222 | /* similar to push_posix_temp_var */ | |
5223 | v = bind_variable (var->name, value_cell (var), ASS_FORCE|ASS_NOLONGJMP); | |
5224 | if (v) | |
5225 | { | |
5226 | v->attributes |= var->attributes; | |
5227 | if (v->context == 0) | |
5228 | v->attributes &= ~(att_tempvar|att_propagate); | |
8f576ade | 5229 | /* XXX - set att_propagate here if v->context > 0? */ |
2dc823ee CR |
5230 | } |
5231 | } | |
5232 | else if (tempvar_p (var) && propagate_p (var)) | |
7117c2d2 | 5233 | { |
8991b5b0 CR |
5234 | /* Make sure we have a hash table to store the variable in while it is |
5235 | being propagated down to the global variables table. Create one if | |
5236 | we have to */ | |
5237 | if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0) | |
85ec0778 | 5238 | shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS); |
d11b8b46 | 5239 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
2afeb2af CR |
5240 | /* XXX - should we set v->context here? */ |
5241 | if (v) | |
5242 | v->context = shell_variables->scope; | |
7117c2d2 JA |
5243 | if (shell_variables == global_variables) |
5244 | var->attributes &= ~(att_tempvar|att_propagate); | |
5245 | else | |
fdf670ea | 5246 | shell_variables->flags |= VC_HASTMPVAR; |
bddda3d2 CR |
5247 | if (v) |
5248 | v->attributes |= var->attributes; | |
7117c2d2 | 5249 | } |
4ac1ff98 CR |
5250 | else |
5251 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 | 5252 | |
2dc823ee CR |
5253 | #if defined (ARRAY_VARS) |
5254 | if (v && (array_p (var) || assoc_p (var))) | |
4e4cebb6 CR |
5255 | arrayvar_copyval (var, v); |
5256 | #endif | |
2dc823ee | 5257 | |
7117c2d2 JA |
5258 | dispose_variable (var); |
5259 | } | |
5260 | ||
c87bb0a8 | 5261 | static void |
a61ffa78 | 5262 | push_func_var (PTR_T data) |
c87bb0a8 CR |
5263 | { |
5264 | SHELL_VAR *var; | |
5265 | ||
5266 | var = (SHELL_VAR *)data; | |
5267 | push_posix_tempvar_internal (var, 0); | |
5268 | } | |
5269 | ||
5270 | static void | |
a61ffa78 | 5271 | push_builtin_var (PTR_T data) |
c87bb0a8 CR |
5272 | { |
5273 | SHELL_VAR *var; | |
5274 | ||
5275 | var = (SHELL_VAR *)data; | |
5276 | push_posix_tempvar_internal (var, 1); | |
5277 | } | |
5278 | ||
7117c2d2 JA |
5279 | /* Pop the top context off of VCXT and dispose of it, returning the rest of |
5280 | the stack. */ | |
5281 | void | |
a61ffa78 | 5282 | pop_var_context (void) |
7117c2d2 JA |
5283 | { |
5284 | VAR_CONTEXT *ret, *vcxt; | |
5285 | ||
5286 | vcxt = shell_variables; | |
5287 | if (vc_isfuncenv (vcxt) == 0) | |
5288 | { | |
055a4552 CR |
5289 | /* If we haven't flushed all of the local contexts already, flag an error */ |
5290 | if (shell_variables != global_variables || variable_context > 0) | |
5291 | internal_error (_("pop_var_context: head of shell_variables not a function context")); | |
7117c2d2 JA |
5292 | return; |
5293 | } | |
5294 | ||
5295 | if (ret = vcxt->down) | |
5296 | { | |
5297 | ret->up = (VAR_CONTEXT *)NULL; | |
5298 | shell_variables = ret; | |
5299 | if (vcxt->table) | |
5300 | hash_flush (vcxt->table, push_func_var); | |
5301 | dispose_var_context (vcxt); | |
5302 | } | |
5303 | else | |
5e13499c | 5304 | internal_error (_("pop_var_context: no global_variables context")); |
7117c2d2 JA |
5305 | } |
5306 | ||
52ae6c3f | 5307 | static void |
a61ffa78 | 5308 | delete_local_contexts (VAR_CONTEXT *vcxt) |
7117c2d2 JA |
5309 | { |
5310 | VAR_CONTEXT *v, *t; | |
5311 | ||
5312 | for (v = vcxt; v != global_variables; v = t) | |
5313 | { | |
5314 | t = v->down; | |
5315 | dispose_var_context (v); | |
52ae6c3f CR |
5316 | } |
5317 | } | |
7117c2d2 | 5318 | |
52ae6c3f CR |
5319 | /* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and |
5320 | all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */ | |
5321 | void | |
a61ffa78 | 5322 | delete_all_contexts (VAR_CONTEXT *vcxt) |
52ae6c3f CR |
5323 | { |
5324 | delete_local_contexts (vcxt); | |
7117c2d2 JA |
5325 | delete_all_variables (global_variables->table); |
5326 | shell_variables = global_variables; | |
5327 | } | |
5328 | ||
52ae6c3f CR |
5329 | /* Reset the context so we are not executing in a shell function. Only call |
5330 | this if you are getting ready to exit the shell. */ | |
5331 | void | |
a61ffa78 | 5332 | reset_local_contexts (void) |
52ae6c3f CR |
5333 | { |
5334 | delete_local_contexts (shell_variables); | |
5335 | shell_variables = global_variables; | |
5336 | variable_context = 0; | |
5337 | } | |
5338 | ||
7117c2d2 JA |
5339 | /* **************************************************************** */ |
5340 | /* */ | |
5341 | /* Pushing and Popping temporary variable scopes */ | |
5342 | /* */ | |
5343 | /* **************************************************************** */ | |
5344 | ||
5345 | VAR_CONTEXT * | |
a61ffa78 | 5346 | push_scope (int flags, HASH_TABLE *tmpvars) |
7117c2d2 JA |
5347 | { |
5348 | return (push_var_context ((char *)NULL, flags, tmpvars)); | |
5349 | } | |
5350 | ||
5351 | static void | |
a61ffa78 | 5352 | push_exported_var (PTR_T data) |
7117c2d2 JA |
5353 | { |
5354 | SHELL_VAR *var, *v; | |
5355 | ||
5356 | var = (SHELL_VAR *)data; | |
5357 | ||
5358 | /* If a temp var had its export attribute set, or it's marked to be | |
5359 | propagated, bind it in the previous scope before disposing it. */ | |
c3271763 CR |
5360 | /* XXX - This isn't exactly right, because all tempenv variables have the |
5361 | export attribute set. */ | |
349e2104 | 5362 | if (tempvar_p (var) && exported_p (var) && propagate_p (var)) |
7117c2d2 JA |
5363 | { |
5364 | var->attributes &= ~att_tempvar; /* XXX */ | |
d11b8b46 | 5365 | v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0); |
7117c2d2 JA |
5366 | if (shell_variables == global_variables) |
5367 | var->attributes &= ~att_propagate; | |
bddda3d2 | 5368 | if (v) |
2afeb2af CR |
5369 | { |
5370 | v->attributes |= var->attributes; | |
5371 | v->context = shell_variables->scope; | |
5372 | } | |
7117c2d2 | 5373 | } |
4ac1ff98 CR |
5374 | else |
5375 | stupidly_hack_special_variables (var->name); /* XXX */ | |
7117c2d2 JA |
5376 | |
5377 | dispose_variable (var); | |
5378 | } | |
5379 | ||
96b7e268 CR |
5380 | /* This is called to propagate variables in the temporary environment of a |
5381 | special builtin (if IS_SPECIAL != 0) or exported variables that are the | |
5382 | result of a builtin like `source' or `command' that can operate on the | |
5383 | variables in its temporary environment. In the first case, we call | |
c87bb0a8 | 5384 | push_builtin_var, which does the right thing. */ |
7117c2d2 | 5385 | void |
877ff726 | 5386 | pop_scope (void *is_special) |
7117c2d2 JA |
5387 | { |
5388 | VAR_CONTEXT *vcxt, *ret; | |
96b7e268 | 5389 | int is_bltinenv; |
7117c2d2 JA |
5390 | |
5391 | vcxt = shell_variables; | |
5392 | if (vc_istempscope (vcxt) == 0) | |
5393 | { | |
5e13499c | 5394 | internal_error (_("pop_scope: head of shell_variables not a temporary environment scope")); |
7117c2d2 JA |
5395 | return; |
5396 | } | |
96b7e268 | 5397 | is_bltinenv = vc_isbltnenv (vcxt); /* XXX - for later */ |
7117c2d2 JA |
5398 | |
5399 | ret = vcxt->down; | |
5400 | if (ret) | |
5401 | ret->up = (VAR_CONTEXT *)NULL; | |
5402 | ||
5403 | shell_variables = ret; | |
5404 | ||
5405 | /* Now we can take care of merging variables in VCXT into set of scopes | |
5406 | whose head is RET (shell_variables). */ | |
5407 | FREE (vcxt->name); | |
5408 | if (vcxt->table) | |
5409 | { | |
877ff726 | 5410 | if ((intptr_t) is_special) |
c87bb0a8 | 5411 | hash_flush (vcxt->table, push_builtin_var); |
7117c2d2 JA |
5412 | else |
5413 | hash_flush (vcxt->table, push_exported_var); | |
5414 | hash_dispose (vcxt->table); | |
5415 | } | |
5416 | free (vcxt); | |
5417 | ||
5418 | sv_ifs ("IFS"); /* XXX here for now */ | |
5419 | } | |
5420 | ||
5421 | /* **************************************************************** */ | |
5422 | /* */ | |
5423 | /* Pushing and Popping function contexts */ | |
5424 | /* */ | |
5425 | /* **************************************************************** */ | |
5426 | ||
c2ccaa21 CR |
5427 | struct saved_dollar_vars { |
5428 | char **first_ten; | |
5429 | WORD_LIST *rest; | |
89d788fb | 5430 | int count; |
c2ccaa21 CR |
5431 | }; |
5432 | ||
5433 | static struct saved_dollar_vars *dollar_arg_stack = (struct saved_dollar_vars *)NULL; | |
2e725f73 | 5434 | static size_t dollar_arg_stack_slots; |
7117c2d2 JA |
5435 | static int dollar_arg_stack_index; |
5436 | ||
c2ccaa21 CR |
5437 | /* Functions to manipulate dollar_vars array. Need to keep these in sync with |
5438 | whatever remember_args() does. */ | |
5439 | static char ** | |
a61ffa78 | 5440 | save_dollar_vars (void) |
c2ccaa21 CR |
5441 | { |
5442 | char **ret; | |
5443 | int i; | |
5444 | ||
5445 | ret = strvec_create (10); | |
5446 | for (i = 1; i < 10; i++) | |
5447 | { | |
5448 | ret[i] = dollar_vars[i]; | |
5449 | dollar_vars[i] = (char *)NULL; | |
5450 | } | |
5451 | return ret; | |
5452 | } | |
5453 | ||
5454 | static void | |
a61ffa78 | 5455 | restore_dollar_vars (char **args) |
c2ccaa21 CR |
5456 | { |
5457 | int i; | |
5458 | ||
5459 | for (i = 1; i < 10; i++) | |
5460 | dollar_vars[i] = args[i]; | |
5461 | } | |
5462 | ||
5463 | static void | |
a61ffa78 | 5464 | free_dollar_vars (void) |
c2ccaa21 CR |
5465 | { |
5466 | int i; | |
5467 | ||
5468 | for (i = 1; i < 10; i++) | |
5469 | { | |
5470 | FREE (dollar_vars[i]); | |
5471 | dollar_vars[i] = (char *)NULL; | |
5472 | } | |
5473 | } | |
5474 | ||
5475 | static void | |
a61ffa78 | 5476 | free_saved_dollar_vars (char **args) |
c2ccaa21 CR |
5477 | { |
5478 | int i; | |
5479 | ||
5480 | for (i = 1; i < 10; i++) | |
5481 | FREE (args[i]); | |
5482 | } | |
5483 | ||
89d788fb CR |
5484 | /* Do what remember_args (xxx, 1) would have done. */ |
5485 | void | |
a61ffa78 | 5486 | clear_dollar_vars (void) |
89d788fb CR |
5487 | { |
5488 | free_dollar_vars (); | |
5489 | dispose_words (rest_of_args); | |
5490 | ||
5491 | rest_of_args = (WORD_LIST *)NULL; | |
5492 | posparam_count = 0; | |
5493 | } | |
5494 | ||
0a233f3e | 5495 | /* XXX - should always be followed by remember_args () */ |
a61ffa78 | 5496 | /* NAME is the function name */ |
7117c2d2 | 5497 | void |
a61ffa78 | 5498 | push_context (char *name, int is_subshell, HASH_TABLE *tempvars) |
7117c2d2 JA |
5499 | { |
5500 | if (is_subshell == 0) | |
5501 | push_dollar_vars (); | |
5502 | variable_context++; | |
5503 | push_var_context (name, VC_FUNCENV, tempvars); | |
5504 | } | |
5505 | ||
5506 | /* Only called when subshell == 0, so we don't need to check, and can | |
5507 | unconditionally pop the dollar vars off the stack. */ | |
5508 | void | |
877ff726 | 5509 | pop_context (void *ignore) |
726f6388 | 5510 | { |
7117c2d2 JA |
5511 | pop_dollar_vars (); |
5512 | variable_context--; | |
5513 | pop_var_context (); | |
726f6388 | 5514 | |
7117c2d2 JA |
5515 | sv_ifs ("IFS"); /* XXX here for now */ |
5516 | } | |
726f6388 | 5517 | |
7117c2d2 JA |
5518 | /* Save the existing positional parameters on a stack. */ |
5519 | void | |
a61ffa78 | 5520 | push_dollar_vars (void) |
7117c2d2 JA |
5521 | { |
5522 | if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots) | |
5523 | { | |
c2ccaa21 | 5524 | dollar_arg_stack = (struct saved_dollar_vars *) |
7117c2d2 | 5525 | xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10) |
c2ccaa21 | 5526 | * sizeof (struct saved_dollar_vars)); |
7117c2d2 | 5527 | } |
89d788fb CR |
5528 | |
5529 | dollar_arg_stack[dollar_arg_stack_index].count = posparam_count; | |
c2ccaa21 CR |
5530 | dollar_arg_stack[dollar_arg_stack_index].first_ten = save_dollar_vars (); |
5531 | dollar_arg_stack[dollar_arg_stack_index++].rest = rest_of_args; | |
5532 | rest_of_args = (WORD_LIST *)NULL; | |
89d788fb | 5533 | posparam_count = 0; |
c2ccaa21 CR |
5534 | |
5535 | dollar_arg_stack[dollar_arg_stack_index].first_ten = (char **)NULL; | |
5536 | dollar_arg_stack[dollar_arg_stack_index].rest = (WORD_LIST *)NULL; | |
7117c2d2 | 5537 | } |
726f6388 | 5538 | |
7117c2d2 JA |
5539 | /* Restore the positional parameters from our stack. */ |
5540 | void | |
a61ffa78 | 5541 | pop_dollar_vars (void) |
7117c2d2 | 5542 | { |
c2ccaa21 | 5543 | if (dollar_arg_stack == 0 || dollar_arg_stack_index == 0) |
7117c2d2 | 5544 | return; |
726f6388 | 5545 | |
89d788fb CR |
5546 | /* Wipe out current values */ |
5547 | clear_dollar_vars (); | |
5548 | ||
c2ccaa21 CR |
5549 | rest_of_args = dollar_arg_stack[--dollar_arg_stack_index].rest; |
5550 | restore_dollar_vars (dollar_arg_stack[dollar_arg_stack_index].first_ten); | |
5551 | free (dollar_arg_stack[dollar_arg_stack_index].first_ten); | |
89d788fb | 5552 | posparam_count = dollar_arg_stack[dollar_arg_stack_index].count; |
c2ccaa21 CR |
5553 | |
5554 | dollar_arg_stack[dollar_arg_stack_index].first_ten = (char **)NULL; | |
5555 | dollar_arg_stack[dollar_arg_stack_index].rest = (WORD_LIST *)NULL; | |
89d788fb CR |
5556 | dollar_arg_stack[dollar_arg_stack_index].count = 0; |
5557 | ||
7117c2d2 | 5558 | set_dollar_vars_unchanged (); |
c2ccaa21 | 5559 | invalidate_cached_quoted_dollar_at (); |
7117c2d2 | 5560 | } |
ccc6cda3 | 5561 | |
7117c2d2 | 5562 | void |
a61ffa78 | 5563 | dispose_saved_dollar_vars (void) |
7117c2d2 | 5564 | { |
c2ccaa21 | 5565 | if (dollar_arg_stack == 0 || dollar_arg_stack_index == 0) |
7117c2d2 | 5566 | return; |
726f6388 | 5567 | |
c2ccaa21 CR |
5568 | dispose_words (dollar_arg_stack[--dollar_arg_stack_index].rest); |
5569 | free_saved_dollar_vars (dollar_arg_stack[dollar_arg_stack_index].first_ten); | |
5570 | free (dollar_arg_stack[dollar_arg_stack_index].first_ten); | |
5571 | ||
5572 | dollar_arg_stack[dollar_arg_stack_index].first_ten = (char **)NULL; | |
5573 | dollar_arg_stack[dollar_arg_stack_index].rest = (WORD_LIST *)NULL; | |
89d788fb | 5574 | dollar_arg_stack[dollar_arg_stack_index].count = 0; |
726f6388 | 5575 | } |
cce855bc | 5576 | |
07298682 CR |
5577 | /* Initialize BASH_ARGV and BASH_ARGC after turning on extdebug after the |
5578 | shell is initialized */ | |
5579 | void | |
a61ffa78 | 5580 | init_bash_argv (void) |
07298682 CR |
5581 | { |
5582 | if (bash_argv_initialized == 0) | |
5583 | { | |
5584 | save_bash_argv (); | |
5585 | bash_argv_initialized = 1; | |
5586 | } | |
5587 | } | |
5588 | ||
5589 | void | |
a61ffa78 | 5590 | save_bash_argv (void) |
07298682 CR |
5591 | { |
5592 | WORD_LIST *list; | |
5593 | ||
5594 | list = list_rest_of_args (); | |
5595 | push_args (list); | |
5596 | dispose_words (list); | |
5597 | } | |
5598 | ||
d3a24ed2 CR |
5599 | /* Manipulate the special BASH_ARGV and BASH_ARGC variables. */ |
5600 | ||
5601 | void | |
a61ffa78 | 5602 | push_args (WORD_LIST *list) |
d3a24ed2 CR |
5603 | { |
5604 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
5605 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
5606 | ARRAY *bash_argv_a, *bash_argc_a; | |
5607 | WORD_LIST *l; | |
5608 | arrayind_t i; | |
5609 | char *t; | |
5610 | ||
5611 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
5612 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
5613 | ||
5614 | for (l = list, i = 0; l; l = l->next, i++) | |
5615 | array_push (bash_argv_a, l->word->word); | |
5616 | ||
5617 | t = itos (i); | |
5618 | array_push (bash_argc_a, t); | |
5619 | free (t); | |
5620 | #endif /* ARRAY_VARS && DEBUGGER */ | |
5621 | } | |
5622 | ||
5623 | /* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC | |
5624 | array and use that value as the count of elements to remove from | |
5625 | BASH_ARGV. */ | |
5626 | void | |
a61ffa78 | 5627 | pop_args (void) |
d3a24ed2 CR |
5628 | { |
5629 | #if defined (ARRAY_VARS) && defined (DEBUGGER) | |
5630 | SHELL_VAR *bash_argv_v, *bash_argc_v; | |
5631 | ARRAY *bash_argv_a, *bash_argc_a; | |
5632 | ARRAY_ELEMENT *ce; | |
5633 | intmax_t i; | |
5634 | ||
5635 | GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a); | |
5636 | GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a); | |
5637 | ||
6110f1bc | 5638 | ce = array_unshift_element (bash_argc_a); |
d3a24ed2 CR |
5639 | if (ce == 0 || legal_number (element_value (ce), &i) == 0) |
5640 | i = 0; | |
5641 | ||
5642 | for ( ; i > 0; i--) | |
5643 | array_pop (bash_argv_a); | |
5644 | array_dispose_element (ce); | |
5645 | #endif /* ARRAY_VARS && DEBUGGER */ | |
5646 | } | |
5647 | ||
877ff726 CR |
5648 | void |
5649 | uw_pop_args (void *ignore) | |
5650 | { | |
5651 | pop_args (); | |
5652 | } | |
5653 | ||
cce855bc JA |
5654 | /************************************************* |
5655 | * * | |
5656 | * Functions to manage special variables * | |
5657 | * * | |
5658 | *************************************************/ | |
5659 | ||
5660 | /* Extern declarations for variables this code has to manage. */ | |
cce855bc JA |
5661 | |
5662 | /* An alist of name.function for each special variable. Most of the | |
5663 | functions don't do much, and in fact, this would be faster with a | |
5664 | switch statement, but by the end of this file, I am sick of switch | |
5665 | statements. */ | |
5666 | ||
5667 | #define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0 | |
5668 | ||
7117c2d2 | 5669 | /* This table will be sorted with qsort() the first time it's accessed. */ |
cce855bc JA |
5670 | struct name_and_function { |
5671 | char *name; | |
f73dda09 | 5672 | sh_sv_func_t *function; |
7117c2d2 | 5673 | }; |
cce855bc | 5674 | |
7117c2d2 | 5675 | static struct name_and_function special_vars[] = { |
7175a77f | 5676 | { "BASH_COMPAT", sv_shcompat }, |
691aebcb CR |
5677 | { "BASH_XTRACEFD", sv_xtracefd }, |
5678 | ||
a7ad477f CR |
5679 | #if defined (JOB_CONTROL) |
5680 | { "CHILD_MAX", sv_childmax }, | |
5681 | #endif | |
5682 | ||
227f982e | 5683 | #if defined (READLINE) |
ac58e8c8 CR |
5684 | # if defined (STRICT_POSIX) |
5685 | { "COLUMNS", sv_winsize }, | |
5686 | # endif | |
6e70dbff CR |
5687 | { "COMP_WORDBREAKS", sv_comp_wordbreaks }, |
5688 | #endif | |
5689 | ||
ff7c092e CR |
5690 | { "EXECIGNORE", sv_execignore }, |
5691 | ||
6faad625 CR |
5692 | { "FUNCNEST", sv_funcnest }, |
5693 | ||
cce855bc | 5694 | { "GLOBIGNORE", sv_globignore }, |
d06fefb2 | 5695 | { "GLOBSORT", sv_globsort }, |
cce855bc | 5696 | |
cce855bc | 5697 | #if defined (HISTORY) |
7117c2d2 JA |
5698 | { "HISTCONTROL", sv_history_control }, |
5699 | { "HISTFILESIZE", sv_histsize }, | |
cce855bc JA |
5700 | { "HISTIGNORE", sv_histignore }, |
5701 | { "HISTSIZE", sv_histsize }, | |
d3a24ed2 | 5702 | { "HISTTIMEFORMAT", sv_histtimefmt }, |
7117c2d2 | 5703 | #endif |
cce855bc | 5704 | |
055a1bf5 CR |
5705 | #if defined (__CYGWIN__) |
5706 | { "HOME", sv_home }, | |
5707 | #endif | |
5708 | ||
7117c2d2 JA |
5709 | #if defined (READLINE) |
5710 | { "HOSTFILE", sv_hostfile }, | |
5711 | #endif | |
cce855bc | 5712 | |
7117c2d2 JA |
5713 | { "IFS", sv_ifs }, |
5714 | { "IGNOREEOF", sv_ignoreeof }, | |
cce855bc | 5715 | |
7117c2d2 | 5716 | { "LANG", sv_locale }, |
cce855bc JA |
5717 | { "LC_ALL", sv_locale }, |
5718 | { "LC_COLLATE", sv_locale }, | |
5719 | { "LC_CTYPE", sv_locale }, | |
5720 | { "LC_MESSAGES", sv_locale }, | |
bb70624e | 5721 | { "LC_NUMERIC", sv_locale }, |
898cc92e | 5722 | { "LC_TIME", sv_locale }, |
7117c2d2 | 5723 | |
ac58e8c8 CR |
5724 | #if defined (READLINE) && defined (STRICT_POSIX) |
5725 | { "LINES", sv_winsize }, | |
5726 | #endif | |
5727 | ||
7117c2d2 JA |
5728 | { "MAIL", sv_mail }, |
5729 | { "MAILCHECK", sv_mail }, | |
5730 | { "MAILPATH", sv_mail }, | |
5731 | ||
5732 | { "OPTERR", sv_opterr }, | |
5733 | { "OPTIND", sv_optind }, | |
5734 | ||
5735 | { "PATH", sv_path }, | |
5736 | { "POSIXLY_CORRECT", sv_strict_posix }, | |
5737 | ||
5738 | #if defined (READLINE) | |
5739 | { "TERM", sv_terminal }, | |
5740 | { "TERMCAP", sv_terminal }, | |
5741 | { "TERMINFO", sv_terminal }, | |
5742 | #endif /* READLINE */ | |
5743 | ||
5744 | { "TEXTDOMAIN", sv_locale }, | |
5745 | { "TEXTDOMAINDIR", sv_locale }, | |
cce855bc | 5746 | |
9c2db999 | 5747 | #if defined (HAVE_TZSET) |
cce855bc JA |
5748 | { "TZ", sv_tz }, |
5749 | #endif | |
5750 | ||
7117c2d2 JA |
5751 | #if defined (HISTORY) && defined (BANG_HISTORY) |
5752 | { "histchars", sv_histchars }, | |
5753 | #endif /* HISTORY && BANG_HISTORY */ | |
5754 | ||
5755 | { "ignoreeof", sv_ignoreeof }, | |
5756 | ||
f73dda09 | 5757 | { (char *)0, (sh_sv_func_t *)0 } |
cce855bc JA |
5758 | }; |
5759 | ||
7117c2d2 JA |
5760 | #define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1) |
5761 | ||
5762 | static int | |
a61ffa78 | 5763 | sv_compare (struct name_and_function *sv1, struct name_and_function *sv2) |
7117c2d2 JA |
5764 | { |
5765 | int r; | |
5766 | ||
5767 | if ((r = sv1->name[0] - sv2->name[0]) == 0) | |
5768 | r = strcmp (sv1->name, sv2->name); | |
5769 | return r; | |
5770 | } | |
5771 | ||
5772 | static inline int | |
a61ffa78 | 5773 | find_special_var (const char *name) |
7117c2d2 JA |
5774 | { |
5775 | register int i, r; | |
5776 | ||
5777 | for (i = 0; special_vars[i].name; i++) | |
5778 | { | |
5779 | r = special_vars[i].name[0] - name[0]; | |
5780 | if (r == 0) | |
5781 | r = strcmp (special_vars[i].name, name); | |
5782 | if (r == 0) | |
5783 | return i; | |
5784 | else if (r > 0) | |
5785 | /* Can't match any of rest of elements in sorted list. Take this out | |
5786 | if it causes problems in certain environments. */ | |
fdf670ea | 5787 | break; |
7117c2d2 JA |
5788 | } |
5789 | return -1; | |
5790 | } | |
5791 | ||
cce855bc JA |
5792 | /* The variable in NAME has just had its state changed. Check to see if it |
5793 | is one of the special ones where something special happens. */ | |
5794 | void | |
b2613ad1 | 5795 | stupidly_hack_special_variables (const char *name) |
cce855bc | 5796 | { |
7117c2d2 | 5797 | static int sv_sorted = 0; |
cce855bc JA |
5798 | int i; |
5799 | ||
7117c2d2 | 5800 | if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */ |
cce855bc | 5801 | { |
7117c2d2 JA |
5802 | qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]), |
5803 | (QSFUNC *)sv_compare); | |
5804 | sv_sorted = 1; | |
cce855bc | 5805 | } |
7117c2d2 JA |
5806 | |
5807 | i = find_special_var (name); | |
5808 | if (i != -1) | |
b2613ad1 | 5809 | (*(special_vars[i].function)) ((char *)name); |
7117c2d2 JA |
5810 | } |
5811 | ||
33fe8777 CR |
5812 | /* Special variables that need hooks to be run when they are unset as part |
5813 | of shell reinitialization should have their sv_ functions run here. */ | |
5814 | void | |
a61ffa78 | 5815 | reinit_special_variables (void) |
33fe8777 CR |
5816 | { |
5817 | #if defined (READLINE) | |
5818 | sv_comp_wordbreaks ("COMP_WORDBREAKS"); | |
5819 | #endif | |
5820 | sv_globignore ("GLOBIGNORE"); | |
5821 | sv_opterr ("OPTERR"); | |
5822 | } | |
5823 | ||
7117c2d2 | 5824 | void |
b2613ad1 | 5825 | sv_ifs (const char *name) |
7117c2d2 JA |
5826 | { |
5827 | SHELL_VAR *v; | |
5828 | ||
5829 | v = find_variable ("IFS"); | |
5830 | setifs (v); | |
cce855bc JA |
5831 | } |
5832 | ||
5833 | /* What to do just after the PATH variable has changed. */ | |
5834 | void | |
b2613ad1 | 5835 | sv_path (const char *name) |
cce855bc JA |
5836 | { |
5837 | /* hash -r */ | |
7117c2d2 | 5838 | phash_flush (); |
cce855bc JA |
5839 | } |
5840 | ||
5841 | /* What to do just after one of the MAILxxxx variables has changed. NAME | |
5842 | is the name of the variable. This is called with NAME set to one of | |
5843 | MAIL, MAILCHECK, or MAILPATH. */ | |
5844 | void | |
b2613ad1 | 5845 | sv_mail (const char *name) |
cce855bc JA |
5846 | { |
5847 | /* If the time interval for checking the files has changed, then | |
5848 | reset the mail timer. Otherwise, one of the pathname vars | |
5849 | to the users mailbox has changed, so rebuild the array of | |
5850 | filenames. */ | |
5851 | if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */ | |
5852 | reset_mail_timer (); | |
5853 | else | |
5854 | { | |
5855 | free_mail_files (); | |
5856 | remember_mail_dates (); | |
5857 | } | |
5858 | } | |
5859 | ||
6faad625 | 5860 | void |
b2613ad1 | 5861 | sv_funcnest (const char *name) |
6faad625 CR |
5862 | { |
5863 | SHELL_VAR *v; | |
5864 | intmax_t num; | |
5865 | ||
5866 | v = find_variable (name); | |
5867 | if (v == 0) | |
5868 | funcnest_max = 0; | |
5869 | else if (legal_number (value_cell (v), &num) == 0) | |
5870 | funcnest_max = 0; | |
5871 | else | |
5872 | funcnest_max = num; | |
5873 | } | |
5874 | ||
ff7c092e CR |
5875 | /* What to do when EXECIGNORE changes. */ |
5876 | void | |
b2613ad1 | 5877 | sv_execignore (const char *name) |
ff7c092e CR |
5878 | { |
5879 | setup_exec_ignore (name); | |
5880 | } | |
5881 | ||
ac58e8c8 CR |
5882 | /* What to do when GLOBIGNORE changes. */ |
5883 | void | |
b2613ad1 | 5884 | sv_globignore (const char *name) |
ac58e8c8 | 5885 | { |
e77a3058 CR |
5886 | if (privileged_mode == 0) |
5887 | setup_glob_ignore (name); | |
ac58e8c8 CR |
5888 | } |
5889 | ||
d06fefb2 CR |
5890 | /* What to do when GLOBSORT changes. */ |
5891 | void | |
5892 | sv_globsort (const char *name) | |
5893 | { | |
5894 | setup_globsort (name); | |
5895 | } | |
5896 | ||
227f982e | 5897 | #if defined (READLINE) |
6e70dbff | 5898 | void |
b2613ad1 | 5899 | sv_comp_wordbreaks (const char *name) |
6e70dbff CR |
5900 | { |
5901 | SHELL_VAR *sv; | |
5902 | ||
5903 | sv = find_variable (name); | |
5904 | if (sv == 0) | |
9614c166 | 5905 | reset_completer_word_break_chars (); |
6e70dbff | 5906 | } |
cce855bc | 5907 | |
cce855bc JA |
5908 | /* What to do just after one of the TERMxxx variables has changed. |
5909 | If we are an interactive shell, then try to reset the terminal | |
5910 | information in readline. */ | |
5911 | void | |
b2613ad1 | 5912 | sv_terminal (const char *name) |
cce855bc JA |
5913 | { |
5914 | if (interactive_shell && no_line_editing == 0) | |
5915 | rl_reset_terminal (get_string_value ("TERM")); | |
5916 | } | |
5917 | ||
5918 | void | |
b2613ad1 | 5919 | sv_hostfile (const char *name) |
cce855bc | 5920 | { |
bb70624e JA |
5921 | SHELL_VAR *v; |
5922 | ||
5923 | v = find_variable (name); | |
5924 | if (v == 0) | |
5925 | clear_hostname_list (); | |
5926 | else | |
5927 | hostname_list_initialized = 0; | |
cce855bc | 5928 | } |
ac58e8c8 CR |
5929 | |
5930 | #if defined (STRICT_POSIX) | |
5931 | /* In strict posix mode, we allow assignments to LINES and COLUMNS (and values | |
5932 | found in the initial environment) to override the terminal size reported by | |
5933 | the kernel. */ | |
5934 | void | |
b2613ad1 | 5935 | sv_winsize (const char *name) |
ac58e8c8 CR |
5936 | { |
5937 | SHELL_VAR *v; | |
5938 | intmax_t xd; | |
5939 | int d; | |
5940 | ||
5941 | if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing) | |
5942 | return; | |
5943 | ||
5944 | v = find_variable (name); | |
ff7c092e | 5945 | if (v == 0 || var_isset (v) == 0) |
ac58e8c8 CR |
5946 | rl_reset_screen_size (); |
5947 | else | |
5948 | { | |
5949 | if (legal_number (value_cell (v), &xd) == 0) | |
5950 | return; | |
3d8cce26 | 5951 | winsize_assignment = 1; |
ac58e8c8 CR |
5952 | d = xd; /* truncate */ |
5953 | if (name[0] == 'L') /* LINES */ | |
5954 | rl_set_screen_size (d, -1); | |
5955 | else /* COLUMNS */ | |
5956 | rl_set_screen_size (-1, d); | |
5957 | winsize_assignment = 0; | |
5958 | } | |
5959 | } | |
5960 | #endif /* STRICT_POSIX */ | |
cce855bc JA |
5961 | #endif /* READLINE */ |
5962 | ||
055a1bf5 CR |
5963 | /* Update the value of HOME in the export environment so tilde expansion will |
5964 | work on cygwin. */ | |
5965 | #if defined (__CYGWIN__) | |
b2613ad1 | 5966 | sv_home (const char *name) |
055a1bf5 CR |
5967 | { |
5968 | array_needs_making = 1; | |
5969 | maybe_make_export_env (); | |
5970 | } | |
5971 | #endif | |
5972 | ||
cce855bc JA |
5973 | #if defined (HISTORY) |
5974 | /* What to do after the HISTSIZE or HISTFILESIZE variables change. | |
5975 | If there is a value for this HISTSIZE (and it is numeric), then stifle | |
5976 | the history. Otherwise, if there is NO value for this variable, | |
5977 | unstifle the history. If name is HISTFILESIZE, and its value is | |
5978 | numeric, truncate the history file to hold no more than that many | |
5979 | lines. */ | |
5980 | void | |
b2613ad1 | 5981 | sv_histsize (const char *name) |
cce855bc JA |
5982 | { |
5983 | char *temp; | |
7117c2d2 | 5984 | intmax_t num; |
f5635ecd | 5985 | int hmax; |
cce855bc JA |
5986 | |
5987 | temp = get_string_value (name); | |
5988 | ||
5989 | if (temp && *temp) | |
5990 | { | |
5991 | if (legal_number (temp, &num)) | |
28ef6c31 | 5992 | { |
dc8fbaf9 | 5993 | hmax = num; |
4b82d1cd CR |
5994 | if (hmax < 0 && name[4] == 'S') |
5995 | unstifle_history (); /* unstifle history if HISTSIZE < 0 */ | |
5996 | else if (name[4] == 'S') | |
cce855bc | 5997 | { |
f5635ecd | 5998 | stifle_history (hmax); |
dc8fbaf9 CR |
5999 | hmax = where_history (); |
6000 | if (history_lines_this_session > hmax) | |
6001 | history_lines_this_session = hmax; | |
cce855bc | 6002 | } |
4b82d1cd | 6003 | else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */ |
cce855bc | 6004 | { |
dc8fbaf9 | 6005 | history_truncate_file (get_string_value ("HISTFILE"), hmax); |
03d922b1 CR |
6006 | /* If we just shrank the history file to fewer lines than we've |
6007 | already read, make sure we adjust our idea of how many lines | |
6008 | we have read from the file. */ | |
6009 | if (hmax < history_lines_in_file) | |
dc8fbaf9 | 6010 | history_lines_in_file = hmax; |
cce855bc JA |
6011 | } |
6012 | } | |
6013 | } | |
6014 | else if (name[4] == 'S') | |
6015 | unstifle_history (); | |
6016 | } | |
6017 | ||
6018 | /* What to do after the HISTIGNORE variable changes. */ | |
6019 | void | |
b2613ad1 | 6020 | sv_histignore (const char *name) |
cce855bc JA |
6021 | { |
6022 | setup_history_ignore (name); | |
6023 | } | |
6024 | ||
6025 | /* What to do after the HISTCONTROL variable changes. */ | |
6026 | void | |
b2613ad1 | 6027 | sv_history_control (const char *name) |
cce855bc JA |
6028 | { |
6029 | char *temp; | |
d3a24ed2 CR |
6030 | char *val; |
6031 | int tptr; | |
cce855bc JA |
6032 | |
6033 | history_control = 0; | |
6034 | temp = get_string_value (name); | |
6035 | ||
d3a24ed2 CR |
6036 | if (temp == 0 || *temp == 0) |
6037 | return; | |
6038 | ||
6039 | tptr = 0; | |
6040 | while (val = extract_colon_unit (temp, &tptr)) | |
cce855bc | 6041 | { |
d3a24ed2 CR |
6042 | if (STREQ (val, "ignorespace")) |
6043 | history_control |= HC_IGNSPACE; | |
6044 | else if (STREQ (val, "ignoredups")) | |
6045 | history_control |= HC_IGNDUPS; | |
6046 | else if (STREQ (val, "ignoreboth")) | |
6047 | history_control |= HC_IGNBOTH; | |
6048 | else if (STREQ (val, "erasedups")) | |
6049 | history_control |= HC_ERASEDUPS; | |
6050 | ||
6051 | free (val); | |
cce855bc JA |
6052 | } |
6053 | } | |
6054 | ||
6055 | #if defined (BANG_HISTORY) | |
6056 | /* Setting/unsetting of the history expansion character. */ | |
6057 | void | |
b2613ad1 | 6058 | sv_histchars (const char *name) |
cce855bc JA |
6059 | { |
6060 | char *temp; | |
6061 | ||
6062 | temp = get_string_value (name); | |
6063 | if (temp) | |
6064 | { | |
6065 | history_expansion_char = *temp; | |
6066 | if (temp[0] && temp[1]) | |
6067 | { | |
6068 | history_subst_char = temp[1]; | |
6069 | if (temp[2]) | |
6070 | history_comment_char = temp[2]; | |
6071 | } | |
6072 | } | |
6073 | else | |
6074 | { | |
6075 | history_expansion_char = '!'; | |
6076 | history_subst_char = '^'; | |
6077 | history_comment_char = '#'; | |
6078 | } | |
6079 | } | |
6080 | #endif /* BANG_HISTORY */ | |
d3a24ed2 CR |
6081 | |
6082 | void | |
b2613ad1 | 6083 | sv_histtimefmt (const char *name) |
d3a24ed2 CR |
6084 | { |
6085 | SHELL_VAR *v; | |
6086 | ||
d42cb8c1 CR |
6087 | if (v = find_variable (name)) |
6088 | { | |
6089 | if (history_comment_char == 0) | |
6090 | history_comment_char = '#'; | |
6091 | } | |
d3a24ed2 CR |
6092 | history_write_timestamps = (v != 0); |
6093 | } | |
cce855bc JA |
6094 | #endif /* HISTORY */ |
6095 | ||
9c2db999 | 6096 | #if defined (HAVE_TZSET) |
cce855bc | 6097 | void |
b2613ad1 | 6098 | sv_tz (const char *name) |
cce855bc | 6099 | { |
e2169ae9 CR |
6100 | SHELL_VAR *v; |
6101 | ||
6102 | v = find_variable (name); | |
6103 | if (v && exported_p (v)) | |
6104 | array_needs_making = 1; | |
6105 | else if (v == 0) | |
6106 | array_needs_making = 1; | |
6107 | ||
6108 | if (array_needs_making) | |
6109 | { | |
6110 | maybe_make_export_env (); | |
6111 | tzset (); | |
6112 | } | |
cce855bc JA |
6113 | } |
6114 | #endif | |
6115 | ||
6116 | /* If the variable exists, then the value of it can be the number | |
6117 | of times we actually ignore the EOF. The default is small, | |
6118 | (smaller than csh, anyway). */ | |
6119 | void | |
b2613ad1 | 6120 | sv_ignoreeof (const char *name) |
cce855bc JA |
6121 | { |
6122 | SHELL_VAR *tmp_var; | |
6123 | char *temp; | |
6124 | ||
6125 | eof_encountered = 0; | |
6126 | ||
6127 | tmp_var = find_variable (name); | |
ae0865bc | 6128 | ignoreeof = tmp_var && var_isset (tmp_var); |
cce855bc JA |
6129 | temp = tmp_var ? value_cell (tmp_var) : (char *)NULL; |
6130 | if (temp) | |
6131 | eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10; | |
6132 | set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */ | |
6133 | } | |
6134 | ||
6135 | void | |
b2613ad1 | 6136 | sv_optind (const char *name) |
cce855bc | 6137 | { |
f3aad56d | 6138 | SHELL_VAR *var; |
cce855bc JA |
6139 | char *tt; |
6140 | int s; | |
6141 | ||
f3aad56d CR |
6142 | var = find_variable ("OPTIND"); |
6143 | tt = var ? get_variable_value (var) : (char *)NULL; | |
6144 | ||
6145 | /* Assume that if var->context < variable_context and variable_context > 0 | |
6146 | then we are restoring the variables's previous state while returning | |
6147 | from a function. */ | |
cce855bc JA |
6148 | if (tt && *tt) |
6149 | { | |
6150 | s = atoi (tt); | |
6151 | ||
6152 | /* According to POSIX, setting OPTIND=1 resets the internal state | |
6153 | of getopt (). */ | |
6154 | if (s < 0 || s == 1) | |
6155 | s = 0; | |
6156 | } | |
6157 | else | |
6158 | s = 0; | |
6159 | getopts_reset (s); | |
6160 | } | |
6161 | ||
6162 | void | |
b2613ad1 | 6163 | sv_opterr (const char *name) |
cce855bc JA |
6164 | { |
6165 | char *tt; | |
6166 | ||
6167 | tt = get_string_value ("OPTERR"); | |
6168 | sh_opterr = (tt && *tt) ? atoi (tt) : 1; | |
6169 | } | |
6170 | ||
6171 | void | |
b2613ad1 | 6172 | sv_strict_posix (const char *name) |
cce855bc | 6173 | { |
ae0865bc CR |
6174 | SHELL_VAR *var; |
6175 | ||
6176 | var = find_variable (name); | |
6177 | posixly_correct = var && var_isset (var); | |
cce855bc JA |
6178 | posix_initialize (posixly_correct); |
6179 | #if defined (READLINE) | |
6180 | if (interactive_shell) | |
6181 | posix_readline_initialize (posixly_correct); | |
6182 | #endif /* READLINE */ | |
6183 | set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */ | |
6184 | } | |
6185 | ||
6186 | void | |
b2613ad1 | 6187 | sv_locale (const char *name) |
cce855bc JA |
6188 | { |
6189 | char *v; | |
863d31ae | 6190 | int r; |
cce855bc JA |
6191 | |
6192 | v = get_string_value (name); | |
6193 | if (name[0] == 'L' && name[1] == 'A') /* LANG */ | |
863d31ae | 6194 | r = set_lang (name, v); |
cce855bc | 6195 | else |
863d31ae CR |
6196 | r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */ |
6197 | ||
6198 | #if 1 | |
6199 | if (r == 0 && posixly_correct) | |
194cfc28 | 6200 | set_exit_status (EXECUTION_FAILURE); |
863d31ae | 6201 | #endif |
cce855bc JA |
6202 | } |
6203 | ||
6204 | #if defined (ARRAY_VARS) | |
6205 | void | |
a61ffa78 | 6206 | set_pipestatus_array (int *ps, int nproc) |
cce855bc JA |
6207 | { |
6208 | SHELL_VAR *v; | |
6209 | ARRAY *a; | |
7117c2d2 | 6210 | ARRAY_ELEMENT *ae; |
cce855bc | 6211 | register int i; |
f73dda09 | 6212 | char *t, tbuf[INT_STRLEN_BOUND(int) + 1]; |
cce855bc JA |
6213 | |
6214 | v = find_variable ("PIPESTATUS"); | |
6215 | if (v == 0) | |
6216 | v = make_new_array_variable ("PIPESTATUS"); | |
6217 | if (array_p (v) == 0) | |
6218 | return; /* Do nothing if not an array variable. */ | |
6219 | a = array_cell (v); | |
7117c2d2 JA |
6220 | |
6221 | if (a == 0 || array_num_elements (a) == 0) | |
cce855bc | 6222 | { |
7117c2d2 JA |
6223 | for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */ |
6224 | { | |
6225 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
6226 | array_insert (a, i, t); | |
6227 | } | |
6228 | return; | |
6229 | } | |
6230 | ||
6231 | /* Fast case */ | |
6232 | if (array_num_elements (a) == nproc && nproc == 1) | |
6233 | { | |
72206eb2 | 6234 | #ifndef ALT_ARRAY_IMPLEMENTATION |
7117c2d2 | 6235 | ae = element_forw (a->head); |
72206eb2 CR |
6236 | #else |
6237 | ae = a->elements[0]; | |
6238 | #endif | |
6110f1bc | 6239 | ARRAY_ELEMENT_REPLACE (ae, itos (ps[0])); |
7117c2d2 JA |
6240 | } |
6241 | else if (array_num_elements (a) <= nproc) | |
6242 | { | |
6243 | /* modify in array_num_elements members in place, then add */ | |
72206eb2 | 6244 | #ifndef ALT_ARRAY_IMPLEMENTATION |
7117c2d2 | 6245 | ae = a->head; |
72206eb2 | 6246 | #endif |
7117c2d2 JA |
6247 | for (i = 0; i < array_num_elements (a); i++) |
6248 | { | |
72206eb2 | 6249 | #ifndef ALT_ARRAY_IMPLEMENTATION |
7117c2d2 | 6250 | ae = element_forw (ae); |
72206eb2 CR |
6251 | #else |
6252 | ae = a->elements[i]; | |
6253 | #endif | |
6110f1bc | 6254 | ARRAY_ELEMENT_REPLACE (ae, itos (ps[i])); |
7117c2d2 JA |
6255 | } |
6256 | /* add any more */ | |
6257 | for ( ; i < nproc; i++) | |
6258 | { | |
6259 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
6260 | array_insert (a, i, t); | |
6261 | } | |
6262 | } | |
6263 | else | |
6264 | { | |
72206eb2 | 6265 | #ifndef ALT_ARRAY_IMPLEMENTATION |
7117c2d2 JA |
6266 | /* deleting elements. it's faster to rebuild the array. */ |
6267 | array_flush (a); | |
6110f1bc | 6268 | for (i = 0; i < nproc; i++) |
7117c2d2 JA |
6269 | { |
6270 | t = inttostr (ps[i], tbuf, sizeof (tbuf)); | |
6271 | array_insert (a, i, t); | |
6272 | } | |
72206eb2 CR |
6273 | #else |
6274 | /* deleting elements. replace the first NPROC, free the rest */ | |
6275 | for (i = 0; i < nproc; i++) | |
6276 | { | |
6277 | ae = a->elements[i]; | |
6278 | ARRAY_ELEMENT_REPLACE (ae, itos (ps[i])); | |
6279 | } | |
6280 | for ( ; i <= array_max_index (a); i++) | |
6281 | { | |
6282 | array_dispose_element (a->elements[i]); | |
6283 | a->elements[i] = (ARRAY_ELEMENT *)NULL; | |
6284 | } | |
6285 | ||
6286 | /* bookkeeping usually taken care of by array_insert */ | |
6287 | set_max_index (a, nproc - 1); | |
6288 | set_first_index (a, 0); | |
6289 | set_num_elements (a, nproc); | |
6290 | #endif /* ALT_ARRAY_IMPLEMENTATION */ | |
cce855bc JA |
6291 | } |
6292 | } | |
64419627 CR |
6293 | |
6294 | ARRAY * | |
a61ffa78 | 6295 | save_pipestatus_array (void) |
64419627 CR |
6296 | { |
6297 | SHELL_VAR *v; | |
2e412574 | 6298 | ARRAY *a; |
64419627 CR |
6299 | |
6300 | v = find_variable ("PIPESTATUS"); | |
6301 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
6302 | return ((ARRAY *)NULL); | |
6303 | ||
2e412574 | 6304 | a = array_copy (array_cell (v)); |
64419627 | 6305 | |
2e412574 | 6306 | return a; |
64419627 CR |
6307 | } |
6308 | ||
6309 | void | |
a61ffa78 | 6310 | restore_pipestatus_array (ARRAY *a) |
64419627 CR |
6311 | { |
6312 | SHELL_VAR *v; | |
6313 | ARRAY *a2; | |
6314 | ||
6315 | v = find_variable ("PIPESTATUS"); | |
6316 | /* XXX - should we still assign even if existing value is NULL? */ | |
6317 | if (v == 0 || array_p (v) == 0 || array_cell (v) == 0) | |
6318 | return; | |
6319 | ||
6320 | a2 = array_cell (v); | |
6321 | var_setarray (v, a); | |
6322 | ||
6323 | array_dispose (a2); | |
6324 | } | |
cce855bc JA |
6325 | #endif |
6326 | ||
6327 | void | |
a61ffa78 | 6328 | set_pipestatus_from_exit (int s) |
cce855bc JA |
6329 | { |
6330 | #if defined (ARRAY_VARS) | |
6331 | static int v[2] = { 0, -1 }; | |
6332 | ||
6333 | v[0] = s; | |
7117c2d2 | 6334 | set_pipestatus_array (v, 1); |
cce855bc JA |
6335 | #endif |
6336 | } | |
691aebcb CR |
6337 | |
6338 | void | |
b2613ad1 | 6339 | sv_xtracefd (const char *name) |
691aebcb CR |
6340 | { |
6341 | SHELL_VAR *v; | |
6342 | char *t, *e; | |
6343 | int fd; | |
6344 | FILE *fp; | |
6345 | ||
6346 | v = find_variable (name); | |
6347 | if (v == 0) | |
6348 | { | |
6349 | xtrace_reset (); | |
6350 | return; | |
6351 | } | |
6352 | ||
6353 | t = value_cell (v); | |
6354 | if (t == 0 || *t == 0) | |
6355 | xtrace_reset (); | |
6356 | else | |
6357 | { | |
6358 | fd = (int)strtol (t, &e, 10); | |
6359 | if (e != t && *e == '\0' && sh_validfd (fd)) | |
6360 | { | |
6361 | fp = fdopen (fd, "w"); | |
6362 | if (fp == 0) | |
8f714a7c CR |
6363 | internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v)); |
6364 | else | |
6365 | xtrace_set (fd, fp); | |
691aebcb CR |
6366 | } |
6367 | else | |
8f714a7c | 6368 | internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v)); |
691aebcb CR |
6369 | } |
6370 | } | |
a7ad477f | 6371 | |
7175a77f CR |
6372 | #define MIN_COMPAT_LEVEL 31 |
6373 | ||
6374 | void | |
b2613ad1 | 6375 | sv_shcompat (const char *name) |
7175a77f CR |
6376 | { |
6377 | SHELL_VAR *v; | |
6378 | char *val; | |
6379 | int tens, ones, compatval; | |
6380 | ||
6381 | v = find_variable (name); | |
6382 | if (v == 0) | |
6383 | { | |
6384 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
6385 | set_compatibility_opts (); | |
6386 | return; | |
6387 | } | |
6388 | val = value_cell (v); | |
6389 | if (val == 0 || *val == '\0') | |
6390 | { | |
6391 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
6392 | set_compatibility_opts (); | |
6393 | return; | |
6394 | } | |
6395 | /* Handle decimal-like compatibility version specifications: 4.2 */ | |
c4c90ef8 | 6396 | if (ISDIGIT (val[0]) && val[1] == '.' && ISDIGIT (val[2]) && val[3] == 0) |
7175a77f CR |
6397 | { |
6398 | tens = val[0] - '0'; | |
6399 | ones = val[2] - '0'; | |
6400 | compatval = tens*10 + ones; | |
6401 | } | |
6402 | /* Handle integer-like compatibility version specifications: 42 */ | |
c4c90ef8 | 6403 | else if (ISDIGIT (val[0]) && ISDIGIT (val[1]) && val[2] == 0) |
7175a77f CR |
6404 | { |
6405 | tens = val[0] - '0'; | |
6406 | ones = val[1] - '0'; | |
6407 | compatval = tens*10 + ones; | |
6408 | } | |
6409 | else | |
6410 | { | |
6411 | compat_error: | |
6412 | internal_error (_("%s: %s: compatibility value out of range"), name, val); | |
6413 | shell_compatibility_level = DEFAULT_COMPAT_LEVEL; | |
6414 | set_compatibility_opts (); | |
6415 | return; | |
6416 | } | |
6417 | ||
6418 | if (compatval < MIN_COMPAT_LEVEL || compatval > DEFAULT_COMPAT_LEVEL) | |
6419 | goto compat_error; | |
6420 | ||
6421 | shell_compatibility_level = compatval; | |
6422 | set_compatibility_opts (); | |
6423 | } | |
6424 | ||
a7ad477f CR |
6425 | #if defined (JOB_CONTROL) |
6426 | void | |
b2613ad1 | 6427 | sv_childmax (const char *name) |
a7ad477f CR |
6428 | { |
6429 | char *tt; | |
6430 | int s; | |
6431 | ||
6432 | tt = get_string_value (name); | |
6433 | s = (tt && *tt) ? atoi (tt) : 0; | |
6434 | set_maxchild (s); | |
6435 | } | |
6436 | #endif |