Girish Ramakrishnan
91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
'use strict';
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exports = module.exports = {
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spawn: spawn,
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exec: exec,
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sudo: sudo
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};
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var assert = require('assert'),
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child_process = require('child_process'),
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debug = require('debug')('box:shell'),
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once = require('once'),
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util = require('util');
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var SUDO = '/usr/bin/sudo';
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function exec(tag, cmd, callback) {
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assert.strictEqual(typeof tag, 'string');
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assert.strictEqual(typeof cmd, 'string');
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assert.strictEqual(typeof callback, 'function');
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debug(`${tag} exec: ${cmd}`);
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child_process.exec(cmd, function (error, stdout, stderr) {
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debug(`${tag} (stdout): %s`, stdout.toString('utf8'));
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debug(`${tag} (stderr): %s`, stderr.toString('utf8'));
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callback(error);
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});
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}
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function spawn(tag, file, args, options, callback) {
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assert.strictEqual(typeof tag, 'string');
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assert.strictEqual(typeof file, 'string');
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assert(util.isArray(args));
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assert.strictEqual(typeof options, 'object');
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assert.strictEqual(typeof callback, 'function');
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callback = once(callback); // exit may or may not be called after an 'error'
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debug(tag + ' spawn: %s %s', file, args.join(' '));
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if (options.ipc) options.stdio = ['pipe', 'pipe', 'pipe', 'ipc'];
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var cp = child_process.spawn(file, args, options);
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if (options.logStream) {
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cp.stdout.pipe(options.logStream);
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cp.stderr.pipe(options.logStream);
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} else {
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cp.stdout.on('data', function (data) {
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debug(tag + ' (stdout): %s', data.toString('utf8'));
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});
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cp.stderr.on('data', function (data) {
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debug(tag + ' (stdout): %s', data.toString('utf8'));
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});
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}
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cp.on('exit', function (code, signal) {
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if (code || signal) debug(tag + ' code: %s, signal: %s', code, signal);
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if (code === 0) return callback(null);
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var e = new Error(util.format(tag + ' exited with error %s signal %s', code, signal));
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e.code = code;
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e.signal = signal;
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callback(e);
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});
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cp.on('error', function (error) {
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debug(tag + ' code: %s, signal: %s', error.code, error.signal);
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callback(error);
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});
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return cp;
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}
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function sudo(tag, args, options, callback) {
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assert.strictEqual(typeof tag, 'string');
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assert(util.isArray(args));
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assert.strictEqual(typeof options, 'object');
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assert.strictEqual(typeof callback, 'function');
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let sudoArgs = [ '-S' ]; // -S makes sudo read stdin for password
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if (options.preserveEnv) sudoArgs.push('-E'); // -E preserves environment
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if (options.ipc) sudoArgs.push('--close-from=4'); // keep the ipc open. requires closefrom_override in sudoers file
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var cp = spawn(tag, SUDO, sudoArgs.concat(args), options, callback);
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cp.stdin.end();
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return cp;
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}
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