localclient.c++

好东东。linux下面的文件节点、文件状态的变化监听代码

//  Copyright (C) 1999 Silicon Graphics, Inc.  All Rights Reserved.
//  
//  This program is free software; you can redistribute it and/or modify it
//  under the terms of version 2 of the GNU General Public License as
//  published by the Free Software Foundation.
//
//  This program is distributed in the hope that it would be useful, but
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  Further, any
//  license provided herein, whether implied or otherwise, is limited to
//  this program in accordance with the express provisions of the GNU
//  General Public License.  Patent licenses, if any, provided herein do not
//  apply to combinations of this program with other product or programs, or
//  any other product whatsoever.  This program is distributed without any
//  warranty that the program is delivered free of the rightful claim of any
//  third person by way of infringement or the like.  See the GNU General
//  Public License for more details.
//
//  You should have received a copy of the GNU General Public License along
//  with this program; if not, write the Free Software Foundation, Inc., 59
//  Temple Place - Suite 330, Boston MA 02111-1307, USA.

#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <assert.h>

#include "LocalClient.h"
#include "Log.h"
#include "Cred.h"

LocalClient::LocalClient(int fd, const struct sockaddr_un *addr, Cred &cred)
: TCP_Client(LOCALHOST(), fd, cred)
{
    assert(cred.is_valid());
    sun.sun_family = AF_UNIX;
    strncpy(sun.sun_path, addr->sun_path, sizeof(sun.sun_path));
    sun.sun_path[sizeof(sun.sun_path) - 1] = '\0';
}

LocalClient::~LocalClient()
{
    if (geteuid() != cred.uid()) cred.become_user();
    unlink(sun.sun_path);
}