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/*************************************************************************** *            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 255typedef 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];    char time[5];    char *buffer;    int i;        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]);	}        buffer = argv[1];       /* 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;      }   /* Nachricht verschicken */   	  msg.mType=*buffer;  	  strncpy(msg.mText,command,MAX_DATA);     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: %s %d\n", msg.mText, (int)msg.mType);   return EXIT_SUCCESS;}