Question

- Write a C code, create a child process, and print out process IDs. Please ubuntu gcc compiler

Thank you..

Answer 1

Answer:

//program that creates a child process and print process ids
#include<sys/types.h>
#include<stdio.h>
//main function
int main()
{
int processId;
processId = fork();
if(processId < 0)
printf("fork error");
if(processId == 0)
{
printf("\nChild process");
printf("\nChild Process ID: %d", getpid());
printf("\nParent Process ID: %d", getppid());
execlp("/bin/ls",NULL);
exit(0);
}
else
{
wait(NULL);
printf("\nParent process");
printf("\nParent Process ID: %d", getpid());
printf("\nChild Process ID: %d", processId);
exit(0);
}
}

Output:

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