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/*
* A message queue program that shows a client server implementation
* this is the sender program using Message Queues
* aka client
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#define MAX_TEXT 512
struct my_msg_st
{
long int my_msg_type;
char some_text[MAX_TEXT];
pid_t clientPID
}
int main(void)
{
int running = 1;
int msgid;
int this_PID;
char ender[3] = "end";
struct my_msg_st some_data;
some_data.clientPID=getpid();
this_PID=some_data.clientPID;
char buffer[BUFSIZ];
system("clear");
msgid = msgget((key_t)1234, 0666 | IPC_CREAT);
if (msgid == -1)
{
fprintf(stderr,"msgget failed with error : %d ", errno);
exit(EXIT_FAILURE);
}
while(running)
{
//printf("this client pid = %d"some_data.clientPID);
printf("Enter some text : ");
fgets(buffer, BUFSIZ, stdin);
if (strncmp(buffer, ender,3) == 0 )
{ running = 0; }
printf(" Text sent : %s ", buffer);
some_data.my_msg_type = 1;
strcpy(some_data.some_text, buffer);
if (msgsnd(msgid, (void *)&some_data, MAX_TEXT, 0) == -1)
{
// perror("msgsnd error");
fprintf(stderr,"msgsnd failed ");
exit(EXIT_FAILURE);
}
}
exit(EXIT_SUCCESS); |
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