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'use strict';
var childProcess = require('child_process');
var spawn = childProcess.spawn;
var exec = childProcess.exec;
module.exports = function (pid, signal, callback) {
if (typeof signal === 'function' && callback === undefined) {
callback = signal;
signal = undefined;
}
pid = parseInt(pid);
if (Number.isNaN(pid)) {
if (callback) {
return callback(new Error("pid must be a number"));
} else {
throw new Error("pid must be a number");
}
}
var tree = {};
var pidsToProcess = {};
tree[pid] = [];
pidsToProcess[pid] = 1;
switch (process.platform) {
case 'win32':
exec('taskkill /pid ' + pid + ' /T /F', callback);
break;
case 'darwin':
buildProcessTree(pid, tree, pidsToProcess, function (parentPid) {
return spawn('pgrep', ['-P', parentPid]);
}, function () {
killAll(tree, signal, callback);
});
break;
// case 'sunos':
// buildProcessTreeSunOS(pid, tree, pidsToProcess, function () {
// killAll(tree, signal, callback);
// });
// break;
default: // Linux
buildProcessTree(pid, tree, pidsToProcess, function (parentPid) {
return spawn('ps', ['-o', 'pid', '--no-headers', '--ppid', parentPid]);
}, function () {
killAll(tree, signal, callback);
});
break;
}
};
function killAll (tree, signal, callback) {
var killed = {};
try {
Object.keys(tree).forEach(function (pid) {
tree[pid].forEach(function (pidpid) {
if (!killed[pidpid]) {
killPid(pidpid, signal);
killed[pidpid] = 1;
}
});
if (!killed[pid]) {
killPid(pid, signal);
killed[pid] = 1;
}
});
} catch (err) {
if (callback) {
return callback(err);
} else {
throw err;
}
}
if (callback) {
return callback();
}
}
function killPid(pid, signal) {
try {
process.kill(parseInt(pid, 10), signal);
}
catch (err) {
if (err.code !== 'ESRCH') throw err;
}
}
function buildProcessTree (parentPid, tree, pidsToProcess, spawnChildProcessesList, cb) {
var ps = spawnChildProcessesList(parentPid);
var allData = '';
ps.stdout.on('data', function (data) {
var data = data.toString('ascii');
allData += data;
});
var onClose = function (code) {
delete pidsToProcess[parentPid];
if (code != 0) {
// no more parent processes
if (Object.keys(pidsToProcess).length == 0) {
cb();
}
return;
}
allData.match(/\d+/g).forEach(function (pid) {
pid = parseInt(pid, 10);
tree[parentPid].push(pid);
tree[pid] = [];
pidsToProcess[pid] = 1;
buildProcessTree(pid, tree, pidsToProcess, spawnChildProcessesList, cb);
});
};
ps.on('close', onClose);
}
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