Checking status after wait()
- by Helper Method
After creating a child process and exiting it immediately (_exit()), I want to perform a wait and check the status. Now I wonder if in the 'else' branch of the if/else construct I also need to check for WIFSIGNALED. As far as I understand, if I perform a wait, a) an error could have occured (-1), the child could have terminated normally by an (exit() or _exit()), or it could have been terminated by a signal, so the check could be omitted, right?
//remainder omitted
int status;
pid_t t_pid = wait(&status);
if (t_pid == -1) {
perror("wait");
exit(EXIT_FAILURE);
}
if (WIFEXITED(status)) {
printf("child terminated normally, status = %d\n",
WEXITSTATUS(status)
);
} else { // <-- do it have to check for WIFSIGNALED() here?
printf("child was terminated by a signal, signum = %d\n",
WTERMSIG(status)
);
}
