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fopen() might return FALSE if permission was denied to read/write the file

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Dylan K. Taylor
2021-02-12 16:16:36 +00:00
parent 2aef83e7d7
commit 094102fe92
2 changed files with 6 additions and 31 deletions
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7
src/pocketmine/PocketMine.php
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@@ -228,7 +228,12 @@ namespace pocketmine {
mkdir(\pocketmine\DATA, 0777, true);
}
define('pocketmine\LOCK_FILE', fopen(\pocketmine\DATA . 'server.lock', "a+b"));
$lockFile = fopen(\pocketmine\DATA . 'server.lock', "a+b");
if($lockFile === false){
critical_error("Unable to open server.lock file. Please check that the current user has read/write permissions to it.");
exit(1);
}
define('pocketmine\LOCK_FILE', $lockFile);
if(!flock(\pocketmine\LOCK_FILE, LOCK_EX | LOCK_NB)){
//wait for a shared lock to avoid race conditions if two servers started at the same time - this makes sure the
//other server wrote its PID and released exclusive lock before we get our lock