Question

I m working on an Unix-Shell, using C langage. I use waitpid to wait my processes to terminate and i want to know if my son process (created with fork() ) received a signal like SIGSEGV.

现行法典:

static const t_error    error[ERROR_NBR]= {
  {SIGHUP, "Hangup"},
  {SIGQUIT, "Quit (core dumped)"},
  {SIGABRT, "Abort (core dumped)"},
  {SIGBUS, "Bus error (core dumped)"},
  {SIGFPE, "Floating exception (core dumped)"},
  {SIGKILL, "Killed"},
  {SIGUSR1, "User signal 1"},
  {SIGSEGV, "Segmentation fault (core dumped)"},
  {SIGUSR2, "User signal 2"},
  {SIGPIPE, "Broken pipe"},
  {SIGTERM, "Terminated"},
};

void print_signal_message(int status)
{
 int i;
 if (WIFSIGNALED(status))
    status = WTERMSIG(status);
 else
    return ;
 i = -1;
 while (++i < ERROR_NBR)
   {
     if (status == error[i].error_status)
       {
         fprintf(stderr, "%s
", error[i].error);
         return ;
       }
   }
 return ;
}
int             xwaitpid(int pid, int *status, int opt)
{
  int           ret;

  ret = waitpid(pid, status, opt);
  if (ret == -1)
    fprintf(stderr, "Can t perfom waitpid (pid = %d)
", pid);
  if (WIFEXITED(*status))
    *status = WEXITSTATUS(*status);
  else
    **print_sigerr(*status);**
  return (ret == -1 ? (1) : ret);
}

<代码>xwaitpid在括号中注明。

看来,即使我执行像<条码>false >、真实>/代码”这样的指挥,也总是返回西非。

有些人有一个可以帮助我的良好想法?

->见我的回答,感谢。

Answer 1

if (WIFEXITED(*status))
    *status = WEXITSTATUS(*status);

这是你的问题。页: 1 之后,你将失去<条码>int中所需的参照标准。

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