Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread

into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between single- and multi-threaded
programs and is a step in the merge of all the libpthread overloads, providing
some ASM and Makefile bits that the other wrappers will need.

ok deraadt@ millert@

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/libc/sys/w_sigaction.c b/lib/libc/sys/w_sigaction.c
new file mode 100644
index 00000000000..263365b8aa2
--- /dev/null
+++ b/lib/libc/sys/w_sigaction.c
@@ -0,0 +1,41 @@
+/*	$OpenBSD: w_sigaction.c,v 1.1 2015/10/23 04:39:24 guenther Exp $ */
+/*
+ * Copyright (c) 2005 Ted Unangst <tedu@openbsd.org>
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/*
+ * signals
+ */
+
+#include <signal.h>
+#include <errno.h>
+
+int
+WRAP(sigaction)(int sig, const struct sigaction *act, struct sigaction *oact)
+{
+	struct sigaction sa;
+
+	if (sig == SIGTHR) {
+		errno = EINVAL;
+		return (-1);
+	}
+	if (act != NULL && sigismember(&act->sa_mask, SIGTHR)) {
+		sa = *act;
+		sigdelset(&sa.sa_mask, SIGTHR);
+		act = &sa;
+	}
+	return (sigaction(sig, act, oact));
+}
+DEF_WRAP(sigaction);