5b8ff14caf
messages not related to an account. * lib/prototypes.h, libmisc/cleanup.c, libmisc/cleanup_group.c, libmisc/cleanup_user.c, libmisc/Makefile.am: Added stack of cleanup functions to be executed on exit. * NEWS, src/groupadd.c, src/groupdel.c, src/groupmod.c: Only report success to audit and syslog when the changes are committed to the system. Do not log failure for on-memory changes to audit or syslog. Make sure failures and inconsistencies will be reported in case of unexpected failures (e.g. malloc failures). Only specify an audit message if it is not implicitly implied by the type argument. Removed fail_exit (replaced by atexit(do_cleanups)).
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/*
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* Copyright (c) 2008 , Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <assert.h>
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#include <stdio.h>
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#include "prototypes.h"
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/*
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* The cleanup_functions stack.
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*/
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#define CLEANUP_FUNCTIONS 10
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static cleanup_function cleanup_functions[CLEANUP_FUNCTIONS];
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static const char * cleanup_function_args[CLEANUP_FUNCTIONS];
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/*
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* - Cleanup functions shall not fail.
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* - You should register do_cleanups with atexit.
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* - You should add cleanup functions to the stack with add_cleanup when
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* an operation is expected to be executed later, and remove it from the
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* stack with del_cleanup when it has been executed.
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*
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**/
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/*
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* do_cleanups - perform the actions stored in the cleanup_functions stack.
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*
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* It is intended to be used as:
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* atexit (do_cleanups);
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*/
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void do_cleanups (void)
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{
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unsigned int i;
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/* Make sure there were no overflow */
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assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-1]);
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i = CLEANUP_FUNCTIONS;
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do {
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i--;
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if (cleanup_functions[i] != NULL) {
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cleanup_functions[i] (cleanup_function_args[i]);
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}
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} while (i>0);
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}
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/*
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* add_cleanup - Add a cleanup_function to the cleanup_functions stack.
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*/
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void add_cleanup (cleanup_function pcf, void *arg)
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{
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unsigned int i;
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assert (NULL != pcf);
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assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-2]);
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/* Add the cleanup_function at the end of the stack */
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for (i=0; NULL != cleanup_functions[i]; i++);
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cleanup_functions[i] = pcf;
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cleanup_function_args[i] = arg;
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}
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/*
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* del_cleanup - Remove a cleanup_function from the cleanup_functions stack.
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*/
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void del_cleanup (cleanup_function pcf)
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{
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unsigned int i;
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assert (NULL != pcf);
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/* Find the pcf cleanup function */
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for (i=0; i<CLEANUP_FUNCTIONS; i++) {
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if (cleanup_functions[i] == pcf) {
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break;
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}
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}
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/* Make sure the cleanup function was found */
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assert (i<CLEANUP_FUNCTIONS);
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/* Move the rest of the cleanup functions */
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for (; i<CLEANUP_FUNCTIONS; i++) {
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/* Make sure the cleanup function was specified only once */
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assert (cleanup_functions[i+1] != pcf);
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if (i == (CLEANUP_FUNCTIONS -1)) {
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cleanup_functions[i] = NULL;
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} else {
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cleanup_functions[i] = cleanup_functions[i+1];
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}
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/* A NULL indicates the end of the stack */
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if (NULL == cleanup_functions[i]) {
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break;
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}
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}
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}
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