- Lab Exercise Make Chatting Program Using Message Queue You Must Run 2 Programs Users When Each Program Starts G 1 (55.34 KiB) Viewed 26 times
- Lab Exercise Make Chatting Program Using Message Queue You Must Run 2 Programs Users When Each Program Starts G 2 (61.57 KiB) Viewed 26 times
- Lab Exercise Make Chatting Program Using Message Queue You Must Run 2 Programs Users When Each Program Starts G 3 (38.3 KiB) Viewed 26 times
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <errno.h>
struct msgbuf{
long msgtype;
char text[256];
};
int main(){
int send_id_int, recv_id_int;
char *send_id = NULL;
char *recv_id = NULL;
size_t size;
printf("My id:");
getline(&send_id, &size, stdin);
send_id[size-1] ='\0';
printf("Receiver's id:");
getline(&recv_id, &size, stdin);
recv_id[size-1] ='\0';
key_t send_k = ftok(".", atoi(send_id));
key_t recv_k = ftok(".", atoi(recv_id));
int send_qid = msgget(send_k, IPC_CREAT | 0660);
int recv_qid = msgget(recv_k, IPC_CREAT | 0660);
if(send_qid == -1 || recv_qid == -1){
perror("msgget error");
exit(0);
}
if(fork () == 0){
// Child - Receiver
}else{
// Parent - Sender
}
}
I need this C programming assignment. in C language. only modifying above source code
Lab Exercise • Make chatting program using Message Queue • You must run 2 programs(users). • When each program starts, get sender's id and receiver's id from stdin - Parent → sender, child → receiver • Sender: - Gets the message from stdin and sends the message to the receiver's id Receiver: - Receives message from other sender - Print out the message
Lab Exercise (cont.) • There should be no wait between sending normal message and receiving ack message (at sender) - add IPC_NOWAIT flags to the msgrev function - Check it "man msgrcy" Quit the program if the user inputs "quit" - When quitting, print out "QUIT" to stdout • Output Format · When receiver receives message from other sender: RECEIVED: $USER_MSG
1 Example input/output shjeongeswin:-/spp/week105 ./9.out My id:10 Receiver's id:20 hi 28! I'm 18. RECEIVED: Hi 18, nice to meet you I think this week assignment is so easy RECEIVED: I think so too! RECEIVED: Oh i finish my assignment! good bye- see you, don't forget say goodbye to TA- quit QUIT shjeongêswin:-/spp/weekjes ./a.out My id:20 Receiver's id:10 RECEIVED: hi 201 I'- 10. Hi 10, nice to meet you RECEIVED: I think this week assignment is so easy I think so too! Oh i finish my assignment! good bye- RECEIVED: see you, don't forget say goodbye to TA- quit QUIT