1 /* copy_command.c -- copy a COMMAND structure. This is needed
2 primarily for making function definitions, but I'm not sure
3 that anyone else will need it. */
5 /* Copyright (C) 1987-2009 Free Software Foundation, Inc.
7 This file is part of GNU Bash, the Bourne Again SHell.
9 Bash is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 Bash is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with Bash. If not, see <http://www.gnu.org/licenses/>.
25 #include "bashtypes.h"
27 #if defined (HAVE_UNISTD_H)
35 static PATTERN_LIST *copy_case_clause __P((PATTERN_LIST *));
36 static PATTERN_LIST *copy_case_clauses __P((PATTERN_LIST *));
37 static FOR_COM *copy_for_command __P((FOR_COM *));
38 #if defined (ARITH_FOR_COMMAND)
39 static ARITH_FOR_COM *copy_arith_for_command __P((ARITH_FOR_COM *));
41 static GROUP_COM *copy_group_command __P((GROUP_COM *));
42 static SUBSHELL_COM *copy_subshell_command __P((SUBSHELL_COM *));
43 static COPROC_COM *copy_coproc_command __P((COPROC_COM *));
44 static CASE_COM *copy_case_command __P((CASE_COM *));
45 static WHILE_COM *copy_while_command __P((WHILE_COM *));
46 static IF_COM *copy_if_command __P((IF_COM *));
47 #if defined (DPAREN_ARITHMETIC)
48 static ARITH_COM *copy_arith_command __P((ARITH_COM *));
50 #if defined (COND_COMMAND)
51 static COND_COM *copy_cond_command __P((COND_COM *));
53 static SIMPLE_COM *copy_simple_command __P((SIMPLE_COM *));
61 new_word = make_bare_word (w->word);
62 new_word->flags = w->flags;
66 /* Copy the chain of words in LIST. Return a pointer to
74 for (new_list = (WORD_LIST *)NULL; list; list = list->next)
75 new_list = make_word_list (copy_word (list->word), new_list);
77 return (REVERSE_LIST (new_list, WORD_LIST *));
81 copy_case_clause (clause)
84 PATTERN_LIST *new_clause;
86 new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST));
87 new_clause->patterns = copy_word_list (clause->patterns);
88 new_clause->action = copy_command (clause->action);
89 new_clause->flags = clause->flags;
94 copy_case_clauses (clauses)
95 PATTERN_LIST *clauses;
97 PATTERN_LIST *new_list, *new_clause;
99 for (new_list = (PATTERN_LIST *)NULL; clauses; clauses = clauses->next)
101 new_clause = copy_case_clause (clauses);
102 new_clause->next = new_list;
103 new_list = new_clause;
105 return (REVERSE_LIST (new_list, PATTERN_LIST *));
108 /* Copy a single redirect. */
110 copy_redirect (redirect)
113 REDIRECT *new_redirect;
115 new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT));
117 FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT)));
119 *new_redirect = *redirect; /* let the compiler do the fast structure copy */
122 if (redirect->rflags & REDIR_VARASSIGN)
123 new_redirect->redirector.filename = copy_word (redirect->redirector.filename);
125 switch (redirect->instruction)
127 case r_reading_until:
128 case r_deblank_reading_until:
129 new_redirect->here_doc_eof = savestring (redirect->here_doc_eof);
131 case r_reading_string:
133 case r_output_direction:
134 case r_input_direction:
135 case r_inputa_direction:
137 case r_append_err_and_out:
140 case r_duplicating_input_word:
141 case r_duplicating_output_word:
142 case r_move_input_word:
143 case r_move_output_word:
144 new_redirect->redirectee.filename = copy_word (redirect->redirectee.filename);
146 case r_duplicating_input:
147 case r_duplicating_output:
153 return (new_redirect);
157 copy_redirects (list)
160 REDIRECT *new_list, *temp;
162 for (new_list = (REDIRECT *)NULL; list; list = list->next)
164 temp = copy_redirect (list);
165 temp->next = new_list;
168 return (REVERSE_LIST (new_list, REDIRECT *));
172 copy_for_command (com)
177 new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM));
178 new_for->flags = com->flags;
179 new_for->line = com->line;
180 new_for->name = copy_word (com->name);
181 new_for->map_list = copy_word_list (com->map_list);
182 new_for->action = copy_command (com->action);
186 #if defined (ARITH_FOR_COMMAND)
187 static ARITH_FOR_COM *
188 copy_arith_for_command (com)
191 ARITH_FOR_COM *new_arith_for;
193 new_arith_for = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM));
194 new_arith_for->flags = com->flags;
195 new_arith_for->line = com->line;
196 new_arith_for->init = copy_word_list (com->init);
197 new_arith_for->test = copy_word_list (com->test);
198 new_arith_for->step = copy_word_list (com->step);
199 new_arith_for->action = copy_command (com->action);
200 return (new_arith_for);
202 #endif /* ARITH_FOR_COMMAND */
205 copy_group_command (com)
208 GROUP_COM *new_group;
210 new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM));
211 new_group->command = copy_command (com->command);
215 static SUBSHELL_COM *
216 copy_subshell_command (com)
219 SUBSHELL_COM *new_subshell;
221 new_subshell = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM));
222 new_subshell->command = copy_command (com->command);
223 new_subshell->flags = com->flags;
224 return (new_subshell);
228 copy_coproc_command (com)
231 COPROC_COM *new_coproc;
233 new_coproc = (COPROC_COM *)xmalloc (sizeof (COPROC_COM));
234 new_coproc->name = savestring (com->name);
235 new_coproc->command = copy_command (com->command);
236 new_coproc->flags = com->flags;
241 copy_case_command (com)
246 new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM));
247 new_case->flags = com->flags;
248 new_case->line = com->line;
249 new_case->word = copy_word (com->word);
250 new_case->clauses = copy_case_clauses (com->clauses);
255 copy_while_command (com)
258 WHILE_COM *new_while;
260 new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM));
261 new_while->flags = com->flags;
262 new_while->test = copy_command (com->test);
263 new_while->action = copy_command (com->action);
268 copy_if_command (com)
273 new_if = (IF_COM *)xmalloc (sizeof (IF_COM));
274 new_if->flags = com->flags;
275 new_if->test = copy_command (com->test);
276 new_if->true_case = copy_command (com->true_case);
277 new_if->false_case = com->false_case ? copy_command (com->false_case) : com->false_case;
281 #if defined (DPAREN_ARITHMETIC)
283 copy_arith_command (com)
286 ARITH_COM *new_arith;
288 new_arith = (ARITH_COM *)xmalloc (sizeof (ARITH_COM));
289 new_arith->flags = com->flags;
290 new_arith->exp = copy_word_list (com->exp);
291 new_arith->line = com->line;
297 #if defined (COND_COMMAND)
299 copy_cond_command (com)
304 new_cond = (COND_COM *)xmalloc (sizeof (COND_COM));
305 new_cond->flags = com->flags;
306 new_cond->line = com->line;
307 new_cond->type = com->type;
308 new_cond->op = com->op ? copy_word (com->op) : com->op;
309 new_cond->left = com->left ? copy_cond_command (com->left) : (COND_COM *)NULL;
310 new_cond->right = com->right ? copy_cond_command (com->right) : (COND_COM *)NULL;
317 copy_simple_command (com)
320 SIMPLE_COM *new_simple;
322 new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM));
323 new_simple->flags = com->flags;
324 new_simple->words = copy_word_list (com->words);
325 new_simple->redirects = com->redirects ? copy_redirects (com->redirects) : (REDIRECT *)NULL;
326 new_simple->line = com->line;
331 copy_function_def_contents (old, new_def)
332 FUNCTION_DEF *old, *new_def;
334 new_def->name = copy_word (old->name);
335 new_def->command = old->command ? copy_command (old->command) : old->command;
336 new_def->flags = old->flags;
337 new_def->line = old->line;
338 new_def->source_file = old->source_file ? savestring (old->source_file) : old->source_file;
343 copy_function_def (com)
346 FUNCTION_DEF *new_def;
348 new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF));
349 new_def = copy_function_def_contents (com, new_def);
353 /* Copy the command structure in COMMAND. Return a pointer to the
354 copy. Don't you forget to dispose_command () on this pointer
357 copy_command (command)
360 COMMAND *new_command;
365 new_command = (COMMAND *)xmalloc (sizeof (COMMAND));
366 FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND));
367 new_command->flags = command->flags;
368 new_command->line = command->line;
370 if (command->redirects)
371 new_command->redirects = copy_redirects (command->redirects);
373 switch (command->type)
376 new_command->value.For = copy_for_command (command->value.For);
379 #if defined (ARITH_FOR_COMMAND)
381 new_command->value.ArithFor = copy_arith_for_command (command->value.ArithFor);
385 #if defined (SELECT_COMMAND)
387 new_command->value.Select =
388 (SELECT_COM *)copy_for_command ((FOR_COM *)command->value.Select);
393 new_command->value.Group = copy_group_command (command->value.Group);
397 new_command->value.Subshell = copy_subshell_command (command->value.Subshell);
401 new_command->value.Coproc = copy_coproc_command (command->value.Coproc);
405 new_command->value.Case = copy_case_command (command->value.Case);
410 new_command->value.While = copy_while_command (command->value.While);
414 new_command->value.If = copy_if_command (command->value.If);
417 #if defined (DPAREN_ARITHMETIC)
419 new_command->value.Arith = copy_arith_command (command->value.Arith);
423 #if defined (COND_COMMAND)
425 new_command->value.Cond = copy_cond_command (command->value.Cond);
430 new_command->value.Simple = copy_simple_command (command->value.Simple);
435 CONNECTION *new_connection;
437 new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION));
438 new_connection->connector = command->value.Connection->connector;
439 new_connection->first = copy_command (command->value.Connection->first);
440 new_connection->second = copy_command (command->value.Connection->second);
441 new_command->value.Connection = new_connection;
445 case cm_function_def:
446 new_command->value.Function_def = copy_function_def (command->value.Function_def);
449 return (new_command);