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38 lines
800 B
38 lines
800 B
3 years ago
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const exec = require('child_process').exec;
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const tree = require('./tree');
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const utils = require('./utils');
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var hasPS = true;
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// discover if the OS has `ps`, and therefore can use psTree
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exec('ps', (error) => {
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module.exports.hasPS = hasPS = !error;
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});
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module.exports = function main(pid, callback) {
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if (typeof pid === 'number') {
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pid = pid.toString();
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}
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if (hasPS && !process.env.NO_PS) {
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return tree(pid, callback);
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}
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utils
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.getStat()
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.then(utils.tree)
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.then((tree) => utils.pidsForTree(tree, pid))
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.then((res) =>
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callback(
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null,
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res.map((p) => p.PID)
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)
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)
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.catch((error) => callback(error));
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};
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if (!module.parent) {
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module.exports(process.argv[2], (e, pids) => console.log(pids));
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}
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module.exports.hasPS = hasPS;
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