Source code to create a child process using clone() function
#include <stdio.h>
#include <sched.h>
#include <stdlib.h>
#include <sys/wait.h>
int fn(void *arg)
{
printf("\nINFO: This code is running under child process.\n");
int i = 0;
int n = atoi(arg);
for ( i = 1 ; i <= 10 ; i++ )
printf("%d * %d = %d\n", n, i, (n*i));
printf("\n");
return 0;
}
void main(int argc, char *argv[])
{
printf("Hello, World!\n");
void *pchild_stack = malloc(1024 * 1024);
if ( pchild_stack == NULL ) {
printf("ERROR: Unable to allocate memory.\n");
exit(EXIT_FAILURE);
}
int pid = clone(fn, pchild_stack + (1024 * 1024), SIGCHLD, argv[1]);
if ( pid < 0 ) {
printf("ERROR: Unable to create the child process.\n");
exit(EXIT_FAILURE);
}
wait(NULL);
free(pchild_stack);
printf("INFO: Child process terminated.\n");
}
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