/***************************************************************************
 *            cron_client.c
 *
 *  Wed May  4 20:03:01 2005
 *  Copyright  2005  tw03d024
 *  Email tw03d024@technikum-wien.at
 ****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <time.h>
#include <string.h>

#define KEY 0410257051
#define PERM 0666
#define MAX_DATA 255

struct tm tm_now;

typedef struct
{
long mType;
char mText[MAX_DATA];
} message_t;

int main(int argc, char *argv[])
{
    message_t msg;
    int msgid = -1;
    char command[MAX_DATA];
    int i;
    char delim[] = ":";
    char *token = NULL;
    int new_hour;
    int new_min;
    
    
    
    if (argc < 2)
    {
      fprintf(stderr,"Usage: %s hh:mm program [arg1] [agr2...argn]\n",argv[0]);
      return EXIT_FAILURE;
      }
   
	for(i=2; i<argc; i++)
	{
		strcat(command, argv[i]);
		strcat(command, " ");
	}
    
    token = strtok( argv[1], delim );
    new_hour = atoi(token);
    
    token = strtok( NULL, delim);
    new_min = atoi(token);
    
    tm_now.tm_hour = new_hour;
    tm_now.tm_min = new_min;
    
    mktime(&tm_now);
    
    msg.mType = (long)tm_now; 
    
   /* Message Queue oeffnen */
   if( (msgid = msgget(KEY,PERM))==-1 )
   {
      /* error handling */
      fprintf(stderr,"%s: Can't access message queue\n",argv[0]);
      return EXIT_FAILURE;
      }
	/*Kommandozeile ins struct schreiben*/
	strncpy(msg.mText,command,MAX_DATA);
	
	fprintf(stdout, "Message sent: %d %s\n", (int)msg.mType, msg.mText);
	
     /* Nachricht verschicken */
     if (msgsnd(msgid,&msg,sizeof(msg)-sizeof(long),0) == -1)
     {
         /* error handling */
         fprintf(stderr,"%s: Can't send message\n",argv[0]);
         return EXIT_FAILURE;
      }
   
   fprintf(stdout, "Message sent: %d %s\n", (int)msg.mType, msg.mText);
   return EXIT_SUCCESS;
}