run-lock.php

<?php


// simple lock, prevent script from running multiple times at once
$lockfile = '/tmp/.run.php-lock-' . md5(implode('', array_slice($argv, 1)));
if (($lock = fopen($lockfile, 'w+')) === false) {
  echo "fopen($lockfile) failed\n";
  die(-1);
}

// lock that bitch
if (flock($lock, LOCK_EX | LOCK_NB) === false) {
  echo "flock($lockfile) failed - possibly already running?\n";
  die(-1);
}

$unlock = function() use (&$lock, $lockfile) {
  printf("unlocking %s\n", $lockfile);
  
  if (is_resource($lock)) {
    fclose($lock);
  }

  if (file_exists($lockfile)) {
    unlink($lockfile);
  }
};

// just in case something fails, clean up
register_shutdown_function($unlock);

// create the actual command

array_shift($argv);

$command = [];
foreach ($argv as $arg) {
  $command[] = '"' . str_replace('"', '\"', $arg) . '"';
}

$command = implode(' ', $command);

echo "running $command\n\n";

passthru($command);