126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*
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chart.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 <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <signal.h>
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#include "definitions.h"
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#include "config.h"
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#include "chart.h"
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#include "common.h"
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#include "image_file/image_file.h"
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static int walk_image_cfg_list(); /* Definition fuer walk_image_cfg_list */
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static void wait_for_childs(); /* Definition fuer wait_for_childs */
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config global_opts; /* Globale Optionen */
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/* Geht die Bilder-Configs durch und startet das
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* Generieren der Bilder
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* Rueckgabe: Anzahl der Childs die Geforkt wurden */
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static int walk_image_cfg_list(){
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int has_forked = 0; /* Zaehler der Childs */
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pid_t pid = 0; /* Temporaer abgespeicherte Pid */
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image_cfg_list_ptr tmp_ptr = global_opts.image_cfg; /* Hilfszeiger auf das aktuelle element der Config-Liste */
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for(; tmp_ptr; tmp_ptr = tmp_ptr->next){ /* Configliste durchgehen */
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if(global_opts.fork){ /* Wenn geforkt werden soll */
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if((pid = fork()) == 0){ /* Unterscheidung ob im Child oder im Parent */
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clear_clean(); /* Wenn im Child, dann die Clean-Liste leeren */
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process_image_cfg(tmp_ptr->image_cfg_file); /* Bild generieren */
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exit(EXIT_SUCCESS); /* und Child beenden */
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}
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else if (pid == -1){ /* Probleme beim Fork */
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exit_error(ERROR_FORK);
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}
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if(!has_forked){ /* beim ersten durchlauf die warte-funktion an die Clean-Liste anhaengen */
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add_clean(wait_for_childs, NULL);
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}
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has_forked++; /* Den fork-zaehler erhoehen */
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DEBUGOUT2("Prozess %d angelegt\n",pid);
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} else { /* Wenn nicht geforkt werden soll */
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process_image_cfg(tmp_ptr->image_cfg_file); /* dann so das Bild generieren */
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}
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}
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return has_forked;
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}
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/* Wartet auf gestartete Child-Prozesse */
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static void wait_for_childs(void *dummy){
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int ret_val;
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pid_t pid;
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while((pid = wait(&ret_val)) != -1){
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DEBUGOUT2("Prozess %d beendet\n", pid);
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}
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}
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/* Main - Funktion */
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int main(int argc, char *argv[]){
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DEBUGOUT1("Programm gestartet\n");
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if(signal(SIGABRT, exit_sig_handler) == SIG_ERR)
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exit_error(ERROR_SEIINST);
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DEBUGOUT1("Signalhandler zum beenden per SIGABRT installiert\n");
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if(signal(SIGINT, exit_sig_handler) == SIG_ERR)
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exit_error(ERROR_SEIINST);
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DEBUGOUT1("Signalhandler zum beenden per SIGINT installiert\n");
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if(signal(SIGQUIT, exit_sig_handler) == SIG_ERR)
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exit_error(ERROR_SEIINST);
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DEBUGOUT1("Signalhandler zum beenden per SIGQUIT installiert\n");
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if(signal(SIGTERM, exit_sig_handler) == SIG_ERR)
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exit_error(ERROR_SEIINST);
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DEBUGOUT1("Signalhandler zum beenden per SIGTERM installiert\n");
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/* Haupt-Config einlesen */
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read_config(DEFAULT_CONFIG_FILE, 1, NULL);
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/* Debug-Ausgaben, um zu sehen, ob die Optionen richtig gesetzt werden */
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DEBUGOUT1("\nOptionen:\n");
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DEBUGOUT2(" cfg_location = %s\n", global_opts.image_cfg_location);
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DEBUGOUT2(" fork = %i\n", global_opts.fork);
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DEBUGOUT1("\nPostgres:\n");
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DEBUGOUT2(" Host: = %s\n",global_opts.pg_host);
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DEBUGOUT2(" User: = %s\n",global_opts.pg_user);
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DEBUGOUT2(" Pass: = %s\n",global_opts.pg_pass);
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DEBUGOUT2(" Datenbank = %s\n",global_opts.pg_database);
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DEBUGOUT2(" Timeout = %s\n",global_opts.pg_database);
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/* Bilder - Configs durchgehen */
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if(walk_image_cfg_list())
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wait_for_childs(NULL);
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DEBUGOUT1("\n-------------------------------------------------------------------\nEnde\n");
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return EXIT_SUCCESS;
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}
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