WIFEXIT

gistfile1.txt

/**
 * Returns a human readable process exit reason based on the exit code.
 */
const char *exec_exitstatus (int status) {
	static __thread char ret[128];

	if (WIFEXITED(status)) {
		if (WEXITSTATUS(status) == 127)
			snprintf(ret, sizeof(ret),
				 "could not execute command");
		else
			snprintf(ret, sizeof(ret), "exited with status %i",
				 WEXITSTATUS(status));

	} else if (WIFSIGNALED(status)) {
#ifdef WCOREDUMP
		if (WCOREDUMP(status))
			snprintf(ret, sizeof(ret), "core dumped");
		else
#endif
			snprintf(ret, sizeof(ret), "terminated by signal %i",
				 WTERMSIG(status));
	} else
		snprintf(ret, sizeof(ret), "exited with code %i", status);

	return ret;
}