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/* * common.js: Common methods used in `forever-monitor`. * * (C) 2010 Charlie Robbins & the Contributors * MIT LICENCE * */ var psTree = require('ps-tree'), spawn = require('child_process').spawn; // // ### function checkProcess (pid, callback) // #### @pid {string} pid of the process to check // #### @callback {function} Continuation to pass control backto. // Utility function to check to see if a pid is running // exports.checkProcess = function (pid) { if (!pid) { return false; } try { // // Trying to kill non-existent process here raises a ESRCH - no such // process exception. Also, signal 0 doesn't do no harm to a process - it // only checks if sending a signal to a given process is possible. // process.kill(pid, 0); return true; } catch (err) { return false; } }; exports.kill = function (pid, killTree, signal, callback) { signal = signal || 'SIGKILL'; callback = callback || function () {}; if (killTree && process.platform !== 'win32') { psTree(pid, function (err, children) { [pid].concat( children.map(function (p) { return p.PID; }) ).forEach(function (tpid) { try { process.kill(tpid, signal) } catch (ex) { } }); callback(); }); } else { try { process.kill(pid, signal) } catch (ex) { } callback(); } };
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