hurd: Add sigtimedwait and sigwaitinfo support

This simply needed to add the timeout parameter to mach_msg, and copy
information from struct hurd_signal_detail.

1 files changed, 9 insertions, 112 deletions

diff --git a/sysdeps/mach/hurd/sigwait.c b/sysdeps/mach/hurd/sigwait.c
index 9d2dfe1..caf1aef 100644
--- a/sysdeps/mach/hurd/sigwait.c
+++ b/sysdeps/mach/hurd/sigwait.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2022 Free Software Foundation, Inc.
+/* Copyright (C) 2022 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -15,128 +15,25 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
+#include <signal.h>
 #include <hurd.h>
-#include <hurd/signal.h>
-#include <hurd/msg.h>
-#include <hurd/sigpreempt.h>
-#include <assert.h>
-#include <sysdep-cancel.h>
 
 /* Select any of pending signals from SET or wait for any to arrive.  */
 int
 __sigwait (const sigset_t *set, int *sig)
 {
-  struct hurd_sigstate *ss;
-  sigset_t mask, ready, blocked;
-  int signo = 0;
-  struct hurd_signal_preemptor preemptor;
-  jmp_buf buf;
-  mach_port_t wait;
-  mach_msg_header_t msg;
-  int cancel_oldtype;
+  int ret;
 
-  sighandler_t
-    preempt_fun (struct hurd_signal_preemptor *pe,
-		 struct hurd_sigstate *ss,
-		 int *sigp,
-		 struct hurd_signal_detail *detail)
-    {
-      if (signo)
-	/* We've already been run; don't interfere. */
-	return SIG_ERR;
+  ret = __sigtimedwait (set, NULL, NULL);
 
-      signo = *sigp;
+  if (ret < 0)
+    return -1;
 
-      /* Make sure this is all kosher */
-      assert (__sigismember (&mask, signo));
+  if (!ret)
+    return __hurd_fail(EAGAIN);
 
-      /* Restore the blocking mask. */
-      ss->blocked = blocked;
-
-      return pe->handler;
-    }
-
-  void
-    handler (int sig)
-    {
-      assert (sig == signo);
-      longjmp (buf, 1);
-    }
-
-  wait = __mach_reply_port ();
-
-  if (set != NULL)
-    /* Crash before locking */
-    mask = *set;
-  else
-    __sigemptyset (&mask);
-
-  ss = _hurd_self_sigstate ();
-  cancel_oldtype = LIBC_CANCEL_ASYNC();
-  _hurd_sigstate_lock (ss);
-
-  /* See if one of these signals is currently pending.  */
-  sigset_t pending = _hurd_sigstate_pending (ss);
-  __sigandset (&ready, &pending, &mask);
-  if (! __sigisemptyset (&ready))
-    {
-      for (signo = 1; signo < NSIG; signo++)
-	if (__sigismember (&ready, signo))
-	  {
-	    __sigdelset (&ready, signo);
-	    goto all_done;
-	  }
-      /* Huh?  Where'd it go? */
-      abort ();
-    }
-
-  /* Wait for one of them to show up.  */
-
-  if (!setjmp (buf))
-    {
-      /* Make the preemptor */
-      preemptor.signals = mask;
-      preemptor.first = 0;
-      preemptor.last = -1;
-      preemptor.preemptor = preempt_fun;
-      preemptor.handler = handler;
-
-      /* Install this preemptor */
-      preemptor.next = ss->preemptors;
-      ss->preemptors = &preemptor;
-
-      /* Unblock the expected signals */
-      blocked = ss->blocked;
-      ss->blocked &= ~mask;
-
-      _hurd_sigstate_unlock (ss);
-
-      /* Wait. */
-      __mach_msg (&msg, MACH_RCV_MSG, 0, sizeof (msg), wait,
-		  MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
-      abort ();
-    }
-  else
-    {
-      assert (signo);
-
-      _hurd_sigstate_lock (ss);
-
-      /* Delete our preemptor. */
-      assert (ss->preemptors == &preemptor);
-      ss->preemptors = preemptor.next;
-    }
-
-
-all_done:
-  _hurd_sigstate_unlock (ss);
-  LIBC_CANCEL_RESET (cancel_oldtype);
-
-  __mach_port_destroy (__mach_task_self (), wait);
-  *sig = signo;
+  *sig = ret;
   return 0;
 }
-
 libc_hidden_def (__sigwait)
 weak_alias (__sigwait, sigwait)