1 files changed, 46 insertions, 0 deletions
diff --git a/src/lib9/fork.c b/src/lib9/fork.c
new file mode 100644
index 000000000..0dd79dfb8
--- /dev/null
+++ b/src/lib9/fork.c
@@ -0,0 +1,46 @@
+/*
+Plan 9 from User Space src/lib9/fork.c
+http://code.swtch.com/plan9port/src/tip/src/lib9/fork.c
+
+Copyright 2001-2007 Russ Cox.  All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+#include <u.h>
+#include <signal.h>
+#include <libc.h>
+#include "9proc.h"
+#undef fork
+
+int
+p9fork(void)
+{
+	int pid;
+	sigset_t all, old;
+
+	sigfillset(&all);
+	sigprocmask(SIG_SETMASK, &all, &old);
+	pid = fork();
+	if(pid == 0){
+		_clearuproc();
+		_p9uproc(0);
+	}
+	sigprocmask(SIG_SETMASK, &old, nil);
+	return pid;
+}