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-rw-r--r--sysdeps/mach/hurd/sigaction.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/sigaction.c b/sysdeps/mach/hurd/sigaction.c
new file mode 100644
index 0000000000..91de02cd17
--- /dev/null
+++ b/sysdeps/mach/hurd/sigaction.c
@@ -0,0 +1,84 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <signal.h>
+#include <hurd.h>
+#include <hurd/signal.h>
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+ If OACT is not NULL, put the old action for SIG in *OACT. */
+int
+DEFUN(__sigaction, (sig, act, oact),
+ int sig AND CONST struct sigaction *act AND struct sigaction *oact)
+{
+ struct hurd_sigstate *ss;
+ struct sigaction a, old;
+ sigset_t pending;
+
+ if (sig <= 0 || sig >= NSIG ||
+ (act != NULL && act->sa_handler != SIG_DFL &&
+ ((__sigmask (sig) & _SIG_CANT_MASK) ||
+ act->sa_handler == SIG_ERR)))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* Copy so we fault before taking locks. */
+ if (act != NULL)
+ a = *act;
+
+ ss = _hurd_self_sigstate ();
+
+ __spin_lock (&ss->lock);
+ old = ss->actions[sig];
+ if (act != NULL)
+ ss->actions[sig] = a;
+
+ if (act != NULL && sig == SIGCHLD)
+ {
+ ss->critical_section = 1;
+ __spin_unlock (&ss->lock);
+
+ /* Inform the proc server whether or not it should send us SIGCHLD for
+ stopped children. We do this in a critical section so that no
+ SIGCHLD can arrive in the middle and be of indeterminate status. */
+ __USEPORT (PROC,
+ __proc_mod_stopchild (port, !(a.sa_flags & SA_NOCLDSTOP)));
+
+ __spin_lock (&ss->lock);
+ ss->critical_section = 0;
+ pending = ss->pending & ~ss->blocked;
+ }
+ else
+ pending = 0;
+
+ __spin_unlock (&ss->lock);
+
+ if (pending)
+ __msg_sig_post (_hurd_msgport, 0, __mach_task_self ());
+
+ if (oact != NULL)
+ *oact = old;
+
+ return 0;
+}
+
+weak_alias (__sigaction, sigaction)