113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
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common.c -- Part of Chart-generator for the weatherstation
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Copyright (C) 2006 Jan Losinski
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h> /* STDOUT_FILENO */
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#include "common.h"
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#include "definitions.h"
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static void clean();
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clean_struct_ptr clean_ptr = NULL;
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/* Ein neues Clean-Element anfuegen. Ein Clean-Element ist eine Datenstruktur, die
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* einen Pointer auf eine Funktion vom Typ
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* void func(void *data),
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* einen Zeiger auf beliebige Daten und einen Zeiger auf das naechste Element haelt.
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* Die Funktionen werden beim regulaeren beenden des Programmes aufgerufen um zum bsp.
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* datenbankverbindungen zu schließen, etc. */
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void add_clean(clean_func_t func, void *data){
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clean_struct_ptr temp = (clean_struct_ptr) malloc(sizeof(clean_data));
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temp->data = data;
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temp->func = func;
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temp->next = NULL;
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if(clean_ptr == NULL){
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clean_ptr = temp;
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} else {
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temp->next = clean_ptr;
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clean_ptr = temp;
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}
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}
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void remove_clean(){
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clean_struct_ptr temp = clean_ptr;
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if (temp != NULL){
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clean_ptr = temp->next;
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free(temp);
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}
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}
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void clear_clean(){
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while(clean_ptr != NULL){
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remove_clean();
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}
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}
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/* 'Saeuberung' ausfuehren */
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static void clean(){
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DEBUGOUT1("\nRaeume auf...\n");
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clean_struct_ptr p = clean_ptr;
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while(p != NULL){
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p->func(p->data);
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p = p->next;
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}
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}
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/* Diese Funktion beendet das Programm mit einer Fehlermeldung. */
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void exit_error(char* err){
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DEBUGOUT1("\nEtwas unschoenes ist passiert\n");
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clean();
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if(errno != 0){
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perror("Fehler");
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}
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write(STDOUT_FILENO, err, strlen(err));
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exit(1);
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}
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/* Wird bei Beendigungssignalen ausgefuehrt */
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void exit_sig_handler(int signr){
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#ifdef DEBUG
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DEBUGOUT1("\n");
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switch (signr){
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case SIGABRT:
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DEBUGOUT1("SIGABRT Interupt erhalten!\n");
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case SIGTERM:
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DEBUGOUT1("SIGTERM Interupt erhalten!\n");
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case SIGQUIT:
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DEBUGOUT1("SIGQUIT Interupt erhalten!\n");
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case SIGINT:
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DEBUGOUT1("SIGINT Interupt erhalten!\n");
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}
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#endif
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clean();
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DEBUGOUT1("Beende Programm...\n");
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exit(0);
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}
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