Question 1: What is the output and the process tree for this code? #include #include #include #include int value = 5; int main(void) { pid_t pid fork(); if (pid == 0) { value += 5; printf("value = %d in FIRST CHILD process %d ppid=%d \n", value, getpid (), getppid()); exit(0); } else { wait (NULL); printf("\n value = %d in parent FIRST process %d ppid=%d \n", value, getpid (), getppid()); pid fork(); if (pid == 0) { value += 10; printf("\n value = %d in SECOND CHILD process %d ppid=%d\n", value, getpid (), getppid()); exit(0); } value++; printf("\n value = %d in parent SECOND process %d ppid=%d\n", value, getpid (), getppid()); return 0; } Output: Process tree:
Question 1: What is the output and the process tree for this code? #include #include #include #include int value = 5; int main(void) { pid_t pid fork(); if (pid == 0) { value += 5; printf("value = %d in FIRST CHILD process %d ppid=%d \n", value, getpid (), getppid()); exit(0); } else { wait (NULL); printf("\n value = %d in parent FIRST process %d ppid=%d \n", value, getpid (), getppid()); pid fork(); if (pid == 0) { value += 10; printf("\n value = %d in SECOND CHILD process %d ppid=%d\n", value, getpid (), getppid()); exit(0); } value++; printf("\n value = %d in parent SECOND process %d ppid=%d\n", value, getpid (), getppid()); return 0; } Output: Process tree:
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:Question 1: What is the output and the process tree for this
code?
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.h>
int value = 5;
int main(void)
{
pid_t pid fork();
if (pid == 0)
{
value += 5;
printf("value = %d in FIRST CHILD process %d ppid=%d \n", value,
getpid (), getppid());
exit(0);
}
else
{
wait (NULL);
printf("\n value = %d in parent FIRST process %d ppid=%d \n", value,
getpid (), getppid());
value += 10;
printf("\n value = %d in SECOND CHILD process %d ppid=%d \n",
value, getpid (), getppid());
exit(0);
}
pid = fork();
if (pid == 0)
{
}
}
value++;
printf("\n value = %d in parent SECOND process %d ppid=%d\n", value,
getpid (), getppid());
return 0;
Output:
Process tree:
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