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-rw-r--r--libc/signal/sigsuspend.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/libc/signal/sigsuspend.c b/libc/signal/sigsuspend.c
new file mode 100644
index 000000000..ad6e0fc8e
--- /dev/null
+++ b/libc/signal/sigsuspend.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1991, 1996, 1997, 1998 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <signal.h>
+#include <stddef.h>
+#include <unistd.h>
+
+
+/* Change the set of blocked signals to SET,
+ wait until a signal arrives, and restore the set of blocked signals. */
+int __sigsuspend (const sigset_t *set)
+{
+ sigset_t oset;
+ int save;
+
+ if (set == NULL)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ if (sigprocmask (SIG_SETMASK, set, &oset) < 0)
+ return -1;
+
+ (void) pause();
+ save = errno;
+
+ if (sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL) < 0)
+ return -1;
+
+ __set_errno (save);
+ return -1;
+}