Here is how to fork 10 children and wait for them to finish:
pid_t pids[10];
int i;
int n = 10;
/* Start children. */
for (i = 0; i < n; ++i) {
if ((pids[i] = fork()) < 0) {
perror("fork");
abort();
} else if (pids[i] == 0) {
DoWorkInChild();
exit(0);
}
}
/* Wait for children to exit. */
int status;
pid_t pid;
while (n > 0) {
pid = wait(&status);
printf("Child with PID %ld exited with status 0x%x.\n", (long)pid, status);
--n; // TODO(pts): Remove pid from the pids array.
}