Exemple #1
0
/* Return any pending signal or wait for one for the given time.  */
static int
do_sigwait (const sigset_t *set, int *sig)
{
    int ret;

#ifdef SIGCANCEL
    sigset_t tmpset;
    if (set != NULL
            && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
# ifdef SIGSETXID
                || __builtin_expect (__sigismember (set, SIGSETXID), 0)
# endif
               ))
    {
        /* Create a temporary mask without the bit for SIGCANCEL set.  */
        // We are not copying more than we have to.
        memcpy (&tmpset, set, _NSIG / 8);
        __sigdelset (&tmpset, SIGCANCEL);
# ifdef SIGSETXID
        __sigdelset (&tmpset, SIGSETXID);
# endif
        set = &tmpset;
    }
#endif

    /* XXX The size argument hopefully will have to be changed to the
       real size of the user-level sigset_t.  */
#ifdef INTERNAL_SYSCALL
    INTERNAL_SYSCALL_DECL (err);
    ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, CHECK_SIGSET (set),
                            NULL, NULL, _NSIG / 8);
    if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
    {
        *sig = ret;
        ret = 0;
    }
    else
        ret = INTERNAL_SYSCALL_ERRNO (ret, err);
#else
    ret = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
                          NULL, NULL, _NSIG / 8);
    if (ret != -1)
    {
        *sig = ret;
        ret = 0;
    }
    else
        ret = errno;
#endif

    return ret;
}
static int
do_sigsuspend (const sigset_t *set)
{
# ifdef __NR_rt_sigsuspend
  /* First try the RT signals.  */
  if (!__libc_missing_rt_sigs)
    {
      /* XXX The size argument hopefully will have to be changed to the
	 real size of the user-level sigset_t.  */
      int saved_errno = errno;
      int result = INLINE_SYSCALL (rt_sigsuspend, 2,
				   CHECK_SIGSET (set), _NSIG / 8);
      if (result >= 0 || errno != ENOSYS)
	return result;

      __set_errno (saved_errno);
      __libc_missing_rt_sigs = 1;
    }
# endif

  return INLINE_SYSCALL (sigsuspend, 3, 0, 0, set->__val[0]);
}
static int
do_sigtimedwait (const sigset_t *set, siginfo_t *info,
		 const struct timespec *timeout)
{
#ifdef SIGCANCEL
  sigset_t tmpset;
  if (set != NULL
      && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
# ifdef SIGSETXID
	  || __builtin_expect (__sigismember (set, SIGSETXID), 0)
# endif
	  ))
    {
      /* Create a temporary mask without the bit for SIGCANCEL set.  */
      // We are not copying more than we have to.
      memcpy (&tmpset, set, _NSIG / 8);
      __sigdelset (&tmpset, SIGCANCEL);
# ifdef SIGSETXID
      __sigdelset (&tmpset, SIGSETXID);
# endif
      set = &tmpset;
    }
#endif

    /* XXX The size argument hopefully will have to be changed to the
       real size of the user-level sigset_t.  */
  int result = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
			       CHECK_1 (info), timeout, _NSIG / 8);

  /* The kernel generates a SI_TKILL code in si_code in case tkill is
     used.  tkill is transparently used in raise().  Since having
     SI_TKILL as a code is useful in general we fold the results
     here.  */
  if (result != -1 && info != NULL && info->si_code == SI_TKILL)
    info->si_code = SI_USER;

  return result;
}