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) 1987,1991 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 it
10 under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 Bash is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
17 License for more details.
19 You should have received a copy of the GNU General Public License
20 along with Bash; see the file COPYING. If not, write to the Free
21 Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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 CASE_COM *copy_case_command __P((CASE_COM *));
44 static WHILE_COM *copy_while_command __P((WHILE_COM *));
45 static IF_COM *copy_if_command __P((IF_COM *));
46 #if defined (DPAREN_ARITHMETIC)
47 static ARITH_COM *copy_arith_command __P((ARITH_COM *));
49 #if defined (COND_COMMAND)
50 static COND_COM *copy_cond_command __P((COND_COM *));
52 static SIMPLE_COM *copy_simple_command __P((SIMPLE_COM *));
53 static FUNCTION_DEF *copy_function_def __P((FUNCTION_DEF *));
61 new_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC));
63 new_word->flags = w->flags;
65 FASTCOPY ((char *)w, (char *)new_word, sizeof (WORD_DESC));
67 new_word->word = savestring (w->word);
71 /* Copy the chain of words in LIST. Return a pointer to
77 WORD_LIST *new_list, *temp;
79 for (new_list = (WORD_LIST *)NULL; list; list = list->next)
81 temp = (WORD_LIST *)xmalloc (sizeof (WORD_LIST));
82 temp->next = new_list;
84 new_list->word = copy_word (list->word);
86 return (REVERSE_LIST (new_list, WORD_LIST *));
90 copy_case_clause (clause)
93 PATTERN_LIST *new_clause;
95 new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST));
96 new_clause->patterns = copy_word_list (clause->patterns);
97 new_clause->action = copy_command (clause->action);
101 static PATTERN_LIST *
102 copy_case_clauses (clauses)
103 PATTERN_LIST *clauses;
105 PATTERN_LIST *new_list, *new_clause;
107 for (new_list = (PATTERN_LIST *)NULL; clauses; clauses = clauses->next)
109 new_clause = copy_case_clause (clauses);
110 new_clause->next = new_list;
111 new_list = new_clause;
113 return (REVERSE_LIST (new_list, PATTERN_LIST *));
116 /* Copy a single redirect. */
118 copy_redirect (redirect)
121 REDIRECT *new_redirect;
123 new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT));
124 FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT)));
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);
132 case r_output_direction:
133 case r_input_direction:
134 case r_inputa_direction:
138 case r_duplicating_input_word:
139 case r_duplicating_output_word:
140 new_redirect->redirectee.filename = copy_word (redirect->redirectee.filename);
142 case r_duplicating_input:
143 case r_duplicating_output:
147 return (new_redirect);
151 copy_redirects (list)
154 REDIRECT *new_list, *temp;
156 for (new_list = (REDIRECT *)NULL; list; list = list->next)
158 temp = copy_redirect (list);
159 temp->next = new_list;
162 return (REVERSE_LIST (new_list, REDIRECT *));
166 copy_for_command (com)
171 new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM));
172 new_for->flags = com->flags;
173 new_for->name = copy_word (com->name);
174 new_for->map_list = copy_word_list (com->map_list);
175 new_for->action = copy_command (com->action);
179 #if defined (ARITH_FOR_COMMAND)
180 static ARITH_FOR_COM *
181 copy_arith_for_command (com)
184 ARITH_FOR_COM *new_arith_for;
186 new_arith_for = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM));
187 new_arith_for->flags = com->flags;
188 new_arith_for->line = com->line;
189 new_arith_for->init = copy_word_list (com->init);
190 new_arith_for->test = copy_word_list (com->test);
191 new_arith_for->step = copy_word_list (com->step);
192 new_arith_for->action = copy_command (com->action);
193 return (new_arith_for);
195 #endif /* ARITH_FOR_COMMAND */
198 copy_group_command (com)
201 GROUP_COM *new_group;
203 new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM));
204 new_group->command = copy_command (com->command);
208 static SUBSHELL_COM *
209 copy_subshell_command (com)
212 SUBSHELL_COM *new_subshell;
214 new_subshell = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM));
215 new_subshell->command = copy_command (com->command);
216 new_subshell->flags = com->flags;
217 return (new_subshell);
221 copy_case_command (com)
226 new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM));
227 new_case->flags = com->flags;
228 new_case->word = copy_word (com->word);
229 new_case->clauses = copy_case_clauses (com->clauses);
234 copy_while_command (com)
237 WHILE_COM *new_while;
239 new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM));
240 new_while->flags = com->flags;
241 new_while->test = copy_command (com->test);
242 new_while->action = copy_command (com->action);
247 copy_if_command (com)
252 new_if = (IF_COM *)xmalloc (sizeof (IF_COM));
253 new_if->flags = com->flags;
254 new_if->test = copy_command (com->test);
255 new_if->true_case = copy_command (com->true_case);
256 new_if->false_case = copy_command (com->false_case);
260 #if defined (DPAREN_ARITHMETIC)
262 copy_arith_command (com)
265 ARITH_COM *new_arith;
267 new_arith = (ARITH_COM *)xmalloc (sizeof (ARITH_COM));
268 new_arith->flags = com->flags;
269 new_arith->exp = copy_word_list (com->exp);
270 new_arith->line = com->line;
276 #if defined (COND_COMMAND)
278 copy_cond_command (com)
283 new_cond = (COND_COM *)xmalloc (sizeof (COND_COM));
284 new_cond->flags = com->flags;
285 new_cond->line = com->line;
286 new_cond->type = com->type;
287 new_cond->op = com->op ? copy_word (com->op) : com->op;
288 new_cond->left = com->left ? copy_cond_command (com->left) : (COND_COM *)NULL;
289 new_cond->right = com->right ? copy_cond_command (com->right) : (COND_COM *)NULL;
296 copy_simple_command (com)
299 SIMPLE_COM *new_simple;
301 new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM));
302 new_simple->flags = com->flags;
303 new_simple->words = copy_word_list (com->words);
304 new_simple->redirects = copy_redirects (com->redirects);
305 new_simple->line = com->line;
309 static FUNCTION_DEF *
310 copy_function_def (com)
313 FUNCTION_DEF *new_def;
315 new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF));
316 new_def->name = copy_word (com->name);
317 new_def->command = copy_command (com->command);
318 new_def->flags = com->flags;
319 new_def->line = com->line;
323 /* Copy the command structure in COMMAND. Return a pointer to the
324 copy. Don't you forget to dispose_command () on this pointer
327 copy_command (command)
330 COMMAND *new_command;
335 new_command = (COMMAND *)xmalloc (sizeof (COMMAND));
336 FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND));
337 new_command->flags = command->flags;
338 new_command->line = command->line;
340 if (command->redirects)
341 new_command->redirects = copy_redirects (command->redirects);
343 switch (command->type)
346 new_command->value.For = copy_for_command (command->value.For);
349 #if defined (ARITH_FOR_COMMAND)
351 new_command->value.ArithFor = copy_arith_for_command (command->value.ArithFor);
355 #if defined (SELECT_COMMAND)
357 new_command->value.Select =
358 (SELECT_COM *)copy_for_command ((FOR_COM *)command->value.Select);
363 new_command->value.Group = copy_group_command (command->value.Group);
367 new_command->value.Subshell = copy_subshell_command (command->value.Subshell);
371 new_command->value.Case = copy_case_command (command->value.Case);
376 new_command->value.While = copy_while_command (command->value.While);
380 new_command->value.If = copy_if_command (command->value.If);
383 #if defined (DPAREN_ARITHMETIC)
385 new_command->value.Arith = copy_arith_command (command->value.Arith);
389 #if defined (COND_COMMAND)
391 new_command->value.Cond = copy_cond_command (command->value.Cond);
396 new_command->value.Simple = copy_simple_command (command->value.Simple);
401 CONNECTION *new_connection;
403 new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION));
404 new_connection->connector = command->value.Connection->connector;
405 new_connection->first = copy_command (command->value.Connection->first);
406 new_connection->second = copy_command (command->value.Connection->second);
407 new_command->value.Connection = new_connection;
411 case cm_function_def:
412 new_command->value.Function_def = copy_function_def (command->value.Function_def);
415 return (new_command);