diff options
Diffstat (limited to 'copy_cmd.c')
| -rw-r--r-- | copy_cmd.c | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/copy_cmd.c b/copy_cmd.c new file mode 100644 index 0000000..758ff23 --- /dev/null +++ b/copy_cmd.c @@ -0,0 +1,459 @@ +/* copy_command.c -- copy a COMMAND structure. This is needed + primarily for making function definitions, but I'm not sure + that anyone else will need it. */ + +/* Copyright (C) 1987-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include "bashtypes.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> + +#include "shell.h" + +static PATTERN_LIST *copy_case_clause PARAMS((PATTERN_LIST *)); +static PATTERN_LIST *copy_case_clauses PARAMS((PATTERN_LIST *)); +static FOR_COM *copy_for_command PARAMS((FOR_COM *)); +#if defined (ARITH_FOR_COMMAND) +static ARITH_FOR_COM *copy_arith_for_command PARAMS((ARITH_FOR_COM *)); +#endif +static GROUP_COM *copy_group_command PARAMS((GROUP_COM *)); +static SUBSHELL_COM *copy_subshell_command PARAMS((SUBSHELL_COM *)); +static COPROC_COM *copy_coproc_command PARAMS((COPROC_COM *)); +static CASE_COM *copy_case_command PARAMS((CASE_COM *)); +static WHILE_COM *copy_while_command PARAMS((WHILE_COM *)); +static IF_COM *copy_if_command PARAMS((IF_COM *)); +#if defined (DPAREN_ARITHMETIC) +static ARITH_COM *copy_arith_command PARAMS((ARITH_COM *)); +#endif +#if defined (COND_COMMAND) +static COND_COM *copy_cond_command PARAMS((COND_COM *)); +#endif +static SIMPLE_COM *copy_simple_command PARAMS((SIMPLE_COM *)); + +WORD_DESC * +copy_word (w) + WORD_DESC *w; +{ + WORD_DESC *new_word; + + new_word = make_bare_word (w->word); + new_word->flags = w->flags; + return (new_word); +} + +/* Copy the chain of words in LIST. Return a pointer to + the new chain. */ +WORD_LIST * +copy_word_list (list) + WORD_LIST *list; +{ + WORD_LIST *new_list, *tl; + + for (new_list = tl = (WORD_LIST *)NULL; list; list = list->next) + { + if (new_list == 0) + new_list = tl = make_word_list (copy_word (list->word), new_list); + else + { + tl->next = make_word_list (copy_word (list->word), (WORD_LIST *)NULL); + tl = tl->next; + } + } + + return (new_list); +} + +static PATTERN_LIST * +copy_case_clause (clause) + PATTERN_LIST *clause; +{ + PATTERN_LIST *new_clause; + + new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST)); + new_clause->patterns = copy_word_list (clause->patterns); + new_clause->action = copy_command (clause->action); + new_clause->flags = clause->flags; + return (new_clause); +} + +static PATTERN_LIST * +copy_case_clauses (clauses) + PATTERN_LIST *clauses; +{ + PATTERN_LIST *new_list, *new_clause; + + for (new_list = (PATTERN_LIST *)NULL; clauses; clauses = clauses->next) + { + new_clause = copy_case_clause (clauses); + new_clause->next = new_list; + new_list = new_clause; + } + return (REVERSE_LIST (new_list, PATTERN_LIST *)); +} + +/* Copy a single redirect. */ +REDIRECT * +copy_redirect (redirect) + REDIRECT *redirect; +{ + REDIRECT *new_redirect; + + new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT)); +#if 0 + FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT))); +#else + *new_redirect = *redirect; /* let the compiler do the fast structure copy */ +#endif + + if (redirect->rflags & REDIR_VARASSIGN) + new_redirect->redirector.filename = copy_word (redirect->redirector.filename); + + switch (redirect->instruction) + { + case r_reading_until: + case r_deblank_reading_until: + new_redirect->here_doc_eof = redirect->here_doc_eof ? savestring (redirect->here_doc_eof) : 0; + /*FALLTHROUGH*/ + case r_reading_string: + case r_appending_to: + case r_output_direction: + case r_input_direction: + case r_inputa_direction: + case r_err_and_out: + case r_append_err_and_out: + case r_input_output: + case r_output_force: + case r_duplicating_input_word: + case r_duplicating_output_word: + case r_move_input_word: + case r_move_output_word: + new_redirect->redirectee.filename = copy_word (redirect->redirectee.filename); + break; + case r_duplicating_input: + case r_duplicating_output: + case r_move_input: + case r_move_output: + case r_close_this: + break; + } + return (new_redirect); +} + +REDIRECT * +copy_redirects (list) + REDIRECT *list; +{ + REDIRECT *new_list, *temp; + + for (new_list = (REDIRECT *)NULL; list; list = list->next) + { + temp = copy_redirect (list); + temp->next = new_list; + new_list = temp; + } + return (REVERSE_LIST (new_list, REDIRECT *)); +} + +static FOR_COM * +copy_for_command (com) + FOR_COM *com; +{ + FOR_COM *new_for; + + new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM)); + new_for->flags = com->flags; + new_for->line = com->line; + new_for->name = copy_word (com->name); + new_for->map_list = copy_word_list (com->map_list); + new_for->action = copy_command (com->action); + return (new_for); +} + +#if defined (ARITH_FOR_COMMAND) +static ARITH_FOR_COM * +copy_arith_for_command (com) + ARITH_FOR_COM *com; +{ + ARITH_FOR_COM *new_arith_for; + + new_arith_for = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM)); + new_arith_for->flags = com->flags; + new_arith_for->line = com->line; + new_arith_for->init = copy_word_list (com->init); + new_arith_for->test = copy_word_list (com->test); + new_arith_for->step = copy_word_list (com->step); + new_arith_for->action = copy_command (com->action); + return (new_arith_for); +} +#endif /* ARITH_FOR_COMMAND */ + +static GROUP_COM * +copy_group_command (com) + GROUP_COM *com; +{ + GROUP_COM *new_group; + + new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM)); + new_group->command = copy_command (com->command); + return (new_group); +} + +static SUBSHELL_COM * +copy_subshell_command (com) + SUBSHELL_COM *com; +{ + SUBSHELL_COM *new_subshell; + + new_subshell = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM)); + new_subshell->command = copy_command (com->command); + new_subshell->flags = com->flags; + new_subshell->line = com->line; + return (new_subshell); +} + +static COPROC_COM * +copy_coproc_command (com) + COPROC_COM *com; +{ + COPROC_COM *new_coproc; + + new_coproc = (COPROC_COM *)xmalloc (sizeof (COPROC_COM)); + new_coproc->name = savestring (com->name); + new_coproc->command = copy_command (com->command); + new_coproc->flags = com->flags; + return (new_coproc); +} + +static CASE_COM * +copy_case_command (com) + CASE_COM *com; +{ + CASE_COM *new_case; + + new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM)); + new_case->flags = com->flags; + new_case->line = com->line; + new_case->word = copy_word (com->word); + new_case->clauses = copy_case_clauses (com->clauses); + return (new_case); +} + +static WHILE_COM * +copy_while_command (com) + WHILE_COM *com; +{ + WHILE_COM *new_while; + + new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM)); + new_while->flags = com->flags; + new_while->test = copy_command (com->test); + new_while->action = copy_command (com->action); + return (new_while); +} + +static IF_COM * +copy_if_command (com) + IF_COM *com; +{ + IF_COM *new_if; + + new_if = (IF_COM *)xmalloc (sizeof (IF_COM)); + new_if->flags = com->flags; + new_if->test = copy_command (com->test); + new_if->true_case = copy_command (com->true_case); + new_if->false_case = com->false_case ? copy_command (com->false_case) : com->false_case; + return (new_if); +} + +#if defined (DPAREN_ARITHMETIC) +static ARITH_COM * +copy_arith_command (com) + ARITH_COM *com; +{ + ARITH_COM *new_arith; + + new_arith = (ARITH_COM *)xmalloc (sizeof (ARITH_COM)); + new_arith->flags = com->flags; + new_arith->exp = copy_word_list (com->exp); + new_arith->line = com->line; + + return (new_arith); +} +#endif + +#if defined (COND_COMMAND) +static COND_COM * +copy_cond_command (com) + COND_COM *com; +{ + COND_COM *new_cond; + + new_cond = (COND_COM *)xmalloc (sizeof (COND_COM)); + new_cond->flags = com->flags; + new_cond->line = com->line; + new_cond->type = com->type; + new_cond->op = com->op ? copy_word (com->op) : com->op; + new_cond->left = com->left ? copy_cond_command (com->left) : (COND_COM *)NULL; + new_cond->right = com->right ? copy_cond_command (com->right) : (COND_COM *)NULL; + + return (new_cond); +} +#endif + +static SIMPLE_COM * +copy_simple_command (com) + SIMPLE_COM *com; +{ + SIMPLE_COM *new_simple; + + new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM)); + new_simple->flags = com->flags; + new_simple->words = copy_word_list (com->words); + new_simple->redirects = com->redirects ? copy_redirects (com->redirects) : (REDIRECT *)NULL; + new_simple->line = com->line; + return (new_simple); +} + +FUNCTION_DEF * +copy_function_def_contents (old, new_def) + FUNCTION_DEF *old, *new_def; +{ + new_def->name = copy_word (old->name); + new_def->command = old->command ? copy_command (old->command) : old->command; + new_def->flags = old->flags; + new_def->line = old->line; + new_def->source_file = old->source_file ? savestring (old->source_file) : old->source_file; + return (new_def); +} + +FUNCTION_DEF * +copy_function_def (com) + FUNCTION_DEF *com; +{ + FUNCTION_DEF *new_def; + + new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF)); + new_def = copy_function_def_contents (com, new_def); + return (new_def); +} + +/* Copy the command structure in COMMAND. Return a pointer to the + copy. Don't you forget to dispose_command () on this pointer + later! */ +COMMAND * +copy_command (command) + COMMAND *command; +{ + COMMAND *new_command; + + if (command == NULL) + return (command); + + new_command = (COMMAND *)xmalloc (sizeof (COMMAND)); + FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND)); + new_command->flags = command->flags; + new_command->line = command->line; + + if (command->redirects) + new_command->redirects = copy_redirects (command->redirects); + + switch (command->type) + { + case cm_for: + new_command->value.For = copy_for_command (command->value.For); + break; + +#if defined (ARITH_FOR_COMMAND) + case cm_arith_for: + new_command->value.ArithFor = copy_arith_for_command (command->value.ArithFor); + break; +#endif + +#if defined (SELECT_COMMAND) + case cm_select: + new_command->value.Select = + (SELECT_COM *)copy_for_command ((FOR_COM *)command->value.Select); + break; +#endif + + case cm_group: + new_command->value.Group = copy_group_command (command->value.Group); + break; + + case cm_subshell: + new_command->value.Subshell = copy_subshell_command (command->value.Subshell); + break; + + case cm_coproc: + new_command->value.Coproc = copy_coproc_command (command->value.Coproc); + break; + + case cm_case: + new_command->value.Case = copy_case_command (command->value.Case); + break; + + case cm_until: + case cm_while: + new_command->value.While = copy_while_command (command->value.While); + break; + + case cm_if: + new_command->value.If = copy_if_command (command->value.If); + break; + +#if defined (DPAREN_ARITHMETIC) + case cm_arith: + new_command->value.Arith = copy_arith_command (command->value.Arith); + break; +#endif + +#if defined (COND_COMMAND) + case cm_cond: + new_command->value.Cond = copy_cond_command (command->value.Cond); + break; +#endif + + case cm_simple: + new_command->value.Simple = copy_simple_command (command->value.Simple); + break; + + case cm_connection: + { + CONNECTION *new_connection; + + new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION)); + new_connection->connector = command->value.Connection->connector; + new_connection->first = copy_command (command->value.Connection->first); + new_connection->second = copy_command (command->value.Connection->second); + new_command->value.Connection = new_connection; + break; + } + + case cm_function_def: + new_command->value.Function_def = copy_function_def (command->value.Function_def); + break; + } + return (new_command); +} |