创建子进程并立即退出(_exit())后,我想执行等待并检查状态。现在我想知道if/else结构的'else'分支是否也需要检查WIFSIGNALED。据我了解,如果我执行等待,a)可能发生了错误(-1),那么孩子可能通过(exit()或_exit())正常终止,或者它可能已被终止信号,所以检查可以省略,对吧?等待后检查状态()
//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)
);
}
+1尼斯链接的方式^^ – helpermethod 2010-03-29 13:08:42