snp-lab-code/P09_Prozesse_und_Threads/Daemon_Prozesse/TimeDaemon.c

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2020-04-26 15:02:50 +02:00
/******************************************************************************
* File: TimeDaemon.c
* Original Autor: M. Thaler (Modul BSY)
* Aufgabe: the daemon code
******************************************************************************/
//*****************************************************************************
// system includes
//*****************************************************************************
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/un.h>
#include <netdb.h>
#include <time.h>
//*****************************************************************************
// local includes
//*****************************************************************************
#include "TimeDaemon.h"
#include "TimeDaemonDefs.h"
#include "IPsockCom.h"
//*****************************************************************************
// Function: TimeDeamon
// Parameter: data: expects here pointer to string
//*****************************************************************************
void TimeDaemon(void *data) {
TimeData tData;
char buffer[COM_BUF_SIZE];
struct tm MyTime;
time_t ActualTime;
int sfd, cfd;
printf("%s\n", (char *)data);
// start server
sfd = StartTimeServer(TIME_PORT);
if (sfd < 0) {
perror("could not start socket server");
exit(-1);
}
while (1) {
cfd = WaitForClient(sfd, buffer);
if ((strcmp(buffer, REQUEST_STRING) == 0) && (cfd >= 0)) {
time(&ActualTime);
MyTime = *localtime(&ActualTime);
tData.hours = MyTime.tm_hour;
tData.minutes = MyTime.tm_min;
tData.seconds = MyTime.tm_sec;
tData.day = MyTime.tm_mday;
tData.month = MyTime.tm_mon + 1;
tData.year = MyTime.tm_year + 1900;
gethostname(tData.servername, HOST_NAM_LEN);
write(cfd, (char *)(&tData), sizeof(tData));
}
}
// if we should somehow come here (how ?)
close(sfd);
exit(0);
}
//*****************************************************************************