shithub: lua9

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Add close function

	This function allows for closing file descriptors and is required
	to close files opened through libplumb for instance.

--- a/lib9.c

+++ b/lib9.c

@@ -1,5 +1,6 @@

 #include <u.h>

 #include <lib9.h>

+#include <unistd.h>

 #include <lua.h>

 #include <lauxlib.h>

 #include <lualib.h>

@@ -26,9 +27,18 @@

 	return 0;

 }

+static int

+lclose(lua_State *L)

+{

+	int fd;

+	fd = luaL_checkinteger(L, 1);

+	close(fd);

+	return 0;

+}

 static const struct luaL_Reg lib9 [] = {

 	{ "fork", lfork },

+	{ "close", lclose },

 	{ NULL, NULL }

 };