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/*
* Perian Update Checker main.m
* Created by Augie Fackler on 1/6/07.
*
* This file is part of Perian.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#import <Cocoa/Cocoa.h>
#include <sys/stat.h>
#include <unistd.h>
#define lockPath "/tmp/PerianUpdateLock"
static int fp = -1;
static void deleteLock()
{
close(fp);
unlink(lockPath);
}
int main(int argc, char *argv[])
{
fp = open(lockPath, O_CREAT | O_EXCL, S_IWUSR | S_IRUSR);
if(fp == -1)
{
struct stat lockfile;
time_t current = time(NULL);
if(stat(lockPath, &lockfile))
{
if(lockfile.st_ctimespec.tv_sec + 60*60 > current) //Only pay attention to lock file if it is no more than an hour old
{
unlink(lockPath);
fp = open(lockPath, O_CREAT | O_EXCL | O_EXLOCK, S_IWUSR | S_IRUSR);
}
}
}
if(fp == -1)
return 0;
atexit(deleteLock);
int ret = NSApplicationMain(argc, (const char **) argv);
return ret;
}