#include <stdio.h>
#include <stdlib.h>

int main() {
	FILE* p = popen("/usr/lib/sendmail -t -oi -oem","w");
	fprintf(p,"From: klaus\n");
	fprintf(p,"To: karl\n");
	fprintf(p,"Subject: Fehler im Backup\n");
	fprintf(p,"\n");
	fprintf(p,"Die Datei xyz war fehlerhaft.\n");
	pclose(p);
	return(EXIT_SUCCESS);
}