opensnoop-nd.stp

#!/usr/bin/stap
/*
 * opensnoop-nd.stp	Trace file open()s. Basic version of opensnoop.
 *			For Linux, uses SystemTap (non-debuginfo).
 *
 * Copyright (C) 2015 Brendan Gregg.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * 21-Mar-2014	Brendan Gregg	Created this.
 */

probe begin
{
	printf("%6s %6s %16s %4s %s\n", "UID", "PID", "COMM", "FD", "PATH");
}

probe nd_syscall.open.return
{
	/* trace on return to ensure the pathname has faulted in */
	printf("%6d %6d %16s %4d %s\n", uid(), pid(), execname(),
	    returnval(), user_string2(@entry(pointer_arg(1)), "-"));
}