Libc-498.tar.gz

[apple/libc.git] / gen / siginterrupt-fbsd.c

diff --git a/gen/siginterrupt-fbsd.c b/gen/siginterrupt-fbsd.c
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+/*
+ * Copyright (c) 1989, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)siginterrupt.c     8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/gen/siginterrupt.c,v 1.4 2002/02/01 00:57:29 obrien Exp $");
+
+#include "namespace.h"
+#include <signal.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+
+/*
+ * Set signal state to prevent restart of system calls
+ * after an instance of the indicated signal.
+ */
+int
+siginterrupt(sig, flag)
+       int sig, flag;
+{
+       extern sigset_t _sigintr;
+       struct sigaction sa;
+       int ret;
+
+       if ((ret = _sigaction(sig, (struct sigaction *)0, &sa)) < 0)
+               return (ret);
+       if (flag) {
+               sigaddset(&_sigintr, sig);
+               sa.sa_flags &= ~SA_RESTART;
+       } else {
+               sigdelset(&_sigintr, sig);
+               sa.sa_flags |= SA_RESTART;
+       }
+       return (_sigaction(sig, &sa, (struct sigaction *)0));
+}