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06_Create_Child_Process.c
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06_Create_Child_Process.c
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// Q. Create a child process using fork() and
// print the process ids.
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main()
{
int f;
printf("Before fork!\n");
f = fork();
// The creation of the process was unsuccessful
if (f < 0)
{
printf("Error occurred!\n");
}
// Child process
else if (f == 0)
{
printf("This is Child Process!\n");
printf("Child: Child Process pid: %d\n", getpid());
printf("Child: Parent Process pid: %d\n", getppid());
}
// Parent process
else
{
printf("This is Parent Process!\n");
printf("Parent: Parent Process pid: %d\n", getpid());
printf("Parent: Child Process pid: %d\n", f);
}
// This part will be executed by both child & parent
printf("This is common!\n");
}
/*
Output:
s4shibam@SHIBAM:~/OS$ gcc 6_Create_Child_Process.c
s4shibam@SHIBAM:~/OS$ ./a.out
Before fork!
This is Parent Process!
This is Child Process!
Parent: Parent Process pid: 1868
Child: Child Process pid: 1869
Parent: Child Process pid: 1869
Child: Parent Process pid: 1868
This is common!
This is common!
s4shibam@SHIBAM:~/OS$
*/