1 files changed, 39 insertions, 0 deletions
diff --git a/src/lib9/ffork-Linux.c b/src/lib9/ffork-Linux.c
new file mode 100644
index 00000000..aad80041
--- /dev/null
+++ b/src/lib9/ffork-Linux.c
@@ -0,0 +1,39 @@
+#include <sched.h>
+#include <signal.h>
+#include <lib9.h>
+
+int fforkstacksize = 16384;
+
+int
+ffork(int flags, void (*fn)(void*), void *arg)
+{
+	char *p;
+	int cloneflag, pid;
+
+	p = malloc(fforkstacksize);
+	if(p == nil)
+		return -1;
+	cloneflag = 0;
+	flags &= ~RFPROC;
+	if(flags&RFMEM){
+		cloneflag |= CLONE_VM;
+		flags &= ~RFMEM;
+	}
+	if(!(flags&RFFDG))
+		cloneflag |= CLONE_FILES;
+	else
+		flags &= ~RFFDG;
+	if(!(flags&RFNOWAIT))
+		cloneflag |= SIGCHLD;
+	else
+		flags &= ~RFNOWAIT;
+	if(flags){
+		fprint(2, "unknown rfork flags %x\n", flags);
+		return -1;
+	}
+	pid = clone((int(*)(void*))fn, p+fforkstacksize-16, cloneflag, arg);
+	if(pid < 0)
+		free(p);
+	return pid;
+}
+