View difference between Paste ID: CN8iTqry and AXEwe9sC

 #include <sys/types.h>
-#include <sys/ipc.h>
+
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
-#include <string.h>
+
 
 struct message{
     long mtype;
     pid_t pid;
     char mtext[MSG_SZ_MAX];
 };
 
 int descr;
 struct message sendMsg, recieveMsg;
 
 static void sigHandle(int signum);
 
 
 void main(){
     descr = msgget(10, IPC_CREAT|0666);
     if(descr==-1){
         perror("msgget");
     }
 
     printf("descriptor : %d\n", descr);
     pid_t myPID = getpid();
     printf("PID : %d\n", myPID);
 
     if(signal(SIGINT, sigHandle) == SIG_ERR){
         perror("Can't handle a signal SIGINT.");
         exit(1);
     }
     if(signal(SIGUSR1, sigHandle) == SIG_ERR){
         perror("Can't handle a signal SIGUSR1.");
         exit(1);
     }
     if(signal(SIGTERM, sigHandle) == SIG_ERR){
         perror("Can't handle a signal SIGTERM.");
         exit(1);
     }
 
     //WHERE TO SEND
     printf("Receiver's PID : ");
     pid_t receiverPID;
     scanf("%d", &receiverPID);
 
     //setting sending msg metainfo
     sendMsg.mtype = receiverPID;
     sendMsg.pid = myPID;
 
     //setting recieve msg metainfo
-
+
 
 
     fflush(stdout);
     if(fork() == 0){
         //printf("child's pid = %d\n", getpid());
         while(1){
             //printf("pid=%d,sending...\n", getpid());
 
             char buf[MSG_SZ_MAX];
-
+
             sprintf(sendMsg.mtext, "[%d] : %s", myPID, buf);
 
             if(msgsnd(descr, &sendMsg, sizeof(struct message), 0) == -1){
                 perror("msgsnd");
                 exit(2);
             }
         }
     } else {
         //printf("parent's pid = %d\n", getpid());
         while(1){
             //printf("pid=%d,receiving...\n", getpid());
 
             if(msgrcv(descr, &recieveMsg, sizeof(struct message), myPID, IPC_NOWAIT) >= 1){
-
+
-            if(msgrcv(descr, &recieveMsg, sizeof(struct message), myPID, IPC_NOWAIT) != -1){
+
         }
     }
 }
 
 static void sigHandle(int signum){
     if(signum == SIGUSR1){
         printf("\nOther process has been terminated.\n");
         msgctl(descr, IPC_RMID, 0);
         exit(0);
     }
     if(signum == SIGINT){
         kill(recieveMsg.pid, SIGUSR1);
         msgctl(descr, IPC_RMID, 0);
         exit(0);
     }
 }