a

libc/getpid.c

@@ -0,0 +1,17 @@
+#include	<u.h>
+#include	<libc.h>
+
+int
+getpid(void)
+{
+	char b[20];
+	int f;
+
+	memset(b, 0, sizeof(b));
+	f = open("#c/pid", 0);
+	if(f >= 0) {
+		read(f, b, sizeof(b));
+		close(f);
+	}
+	return atol(b);
+}