4 files changed, 99 insertions, 3 deletions
diff --git a/signal/Makefile b/signal/Makefile
index 29aeea5f2b..0642f75718 100644
--- a/signal/Makefile
+++ b/signal/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
+# Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 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
@@ -33,7 +33,8 @@ routines	:= signal raise killpg \
 		   sigreturn \
 		   siggetmask sysv_signal \
 		   sigisempty sigandset sigorset \
-		   allocrtsig sigtimedwait sigwaitinfo sigqueue
+		   allocrtsig sigtimedwait sigwaitinfo sigqueue \
+		   sighold sigrelse sigignore sigset
 
 tests		:= tst-signal
 
diff --git a/signal/sighold.c b/signal/sighold.c
new file mode 100644
index 0000000000..d2cb537912
--- /dev/null
+++ b/signal/sighold.c
@@ -0,0 +1,39 @@
+/* Add SIG to the calling process' signal mask.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <signal.h>
+
+int
+sighold (sig)
+     int sig;
+{
+  sigset_t set;
+
+  /* Retrieve current signal set.  */
+  if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0)
+    return -1;
+
+  /* Add the specified signal.  */
+  if (sigaddset (&set, sig) < 0)
+    return -1;
+
+  /* Set the new mask.  */
+  return __sigprocmask (SIG_SETMASK, &set, NULL);
+}
diff --git a/signal/signal.h b/signal/signal.h
index 589b870806..864a49b6e1 100644
--- a/signal/signal.h
+++ b/signal/signal.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
+/* Copyright (C) 1991,92,93,94,95,96,97,98 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
@@ -345,6 +345,23 @@ extern int sigaltstack __P ((__const struct sigaltstack *__ss,
 #endif /* signal.h included and use BSD or X/Open Unix.  */
 
 
+#if defined _SIGNAL_H && defined __USE_UNIX98
+/* Simplified interface for signal management.  */
+
+/* Add SIG to the calling process' signal mask.  */
+extern int sighold __P ((int __sig));
+
+/* Remove SIG from the calling process' signal mask.  */
+extern int sigrelse __P ((int __sig));
+
+/* Set the disposition of SIG to SIG_IGN.  */
+extern int sigignore __P ((int __sig));
+
+/* Set the disposition of SIG.  */
+extern __sighandler_t sigset __P ((int __sig, __sighandler_t __disp));
+#endif
+
+
 /* The following functions are used internally in the C library and in
    other code which need deep insights.  */
 
diff --git a/signal/sigrelse.c b/signal/sigrelse.c
new file mode 100644
index 0000000000..44e1001a06
--- /dev/null
+++ b/signal/sigrelse.c
@@ -0,0 +1,39 @@
+/* Remove SIG from the calling process' signal mask.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <signal.h>
+
+int
+sigrelse (sig)
+     int sig;
+{
+  sigset_t set;
+
+  /* Retrieve current signal set.  */
+  if (sigprocmask (SIG_SETMASK, NULL, &set) < 0)
+    return -1;
+
+  /* Remove the specified signal.  */
+  if (sigdelset (&set, sig) < 0)
+    return -1;
+
+  /* Set the new mask.  */
+  return sigprocmask (SIG_SETMASK, &set, NULL);
+}