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-rw-r--r--sysdeps/posix/sigintr.c57
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diff --git a/sysdeps/posix/sigintr.c b/sysdeps/posix/sigintr.c
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+/* Copyright (C) 1992, 1994 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 <stddef.h>
+#include <signal.h>
+#include <errno.h>
+
+/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
+ (causing them to fail with EINTR); if INTERRUPT is zero, make system
+ calls be restarted after signal SIG. */
+int
+DEFUN(siginterrupt, (sig, interrupt),
+ int sig AND int interrupt)
+{
+#ifdef SA_RESTART
+ extern sigset_t _sigintr; /* Defined in signal.c. */
+ struct sigaction action;
+
+ if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
+ return -1;
+
+ if (interrupt)
+ {
+ __sigaddset (&_sigintr, sig);
+ action.sa_flags &= ~SA_RESTART;
+ }
+ else
+ {
+ __sigdelset (&_sigintr, sig);
+ action.sa_flags |= SA_RESTART;
+ }
+
+ if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
+ return -1;
+
+ return 0;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}