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  1. #include <stdio.h>
  2. #include <sys/types.h>
  3. #include <unistd.h>
  4. #include <stdlib.h>
  5. #include <sys/wait.h>
  6.  
  7. int main(void) {
  8.     pid_t pid;
  9.     printf("BEFORE FORK\n");  
  10.  
  11.     pid = fork();
  12.  
  13.     if (pid > 0) {  
  14.         sleep(1);  
  15.         printf("PARENT PID: %d, PPID: %d, CHILD PID: %d\n", getpid(), getppid(), pid); 
  16.         wait(NULL); 
  17.     } 
  18.     else if (pid == 0) {  
  19.         printf("CHILD PID: %d, PPID: %d\n", getpid(), getppid());  
  20.         exit(0);  // Exit the child process properly
  21.     } 
  22.     else {  
  23.         printf("FORK ERROR\n");  
  24.         exit(1);
  25.     }
  26.  
  27.     printf("BOTH PROCESSES CONTINUE FROM HERE\n");  
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0s 5292KB
comments (?)
stdin
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Standard input is empty
stdout
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BEFORE FORK
CHILD PID: 876037, PPID: 876034
BEFORE FORK
PARENT PID: 876034, PPID: 876033, CHILD PID: 876037
BOTH PROCESSES CONTINUE FROM HERE
https://ideone.com/fE7X6H
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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