77 lines
2.1 KiB
JavaScript
77 lines
2.1 KiB
JavaScript
'use strict';
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const log = require('npmlog');
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const config = require('config');
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const fs = require('fs');
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const tryRequire = require('try-require');
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const posix = tryRequire('posix');
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function _getConfigUidGid(prefix, defaultUid, defaultGid) {
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let uid = defaultUid;
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let gid = defaultGid;
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if (posix) {
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try {
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if (config.user) {
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uid = posix.getpwnam(config[prefix + 'user']).uid;
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}
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} catch (err) {
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log.info('PrivilegeHelpers', 'Failed to resolve user id "%s"', config[prefix + 'user']);
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}
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try {
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if (config.user) {
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gid = posix.getpwnam(config[prefix + 'group']).gid;
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}
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} catch (err) {
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log.info('PrivilegeHelpers', 'Failed to resolve group id "%s"', config[prefix + 'group']);
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}
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} else {
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log.info('PrivilegeHelpers', 'Posix module not installed. Cannot resolve uid/gid');
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}
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return { uid, gid };
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}
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function getConfigUidGid() {
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return _getConfigUidGid('', process.getuid(), process.getgid());
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}
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function getConfigROUidGid() {
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let rwIds = getConfigUidGid();
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return _getConfigUidGid('ro', rwIds.uid, rwIds.gid);
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}
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function ensureMailtrainOwner(file, callback) {
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const ids = getConfigUidGid();
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fs.chown(file, ids.uid, ids.gid, callback);
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}
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function dropRootPrivileges() {
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if (config.group) {
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try {
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process.setgid(config.group);
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log.info('PrivilegeHelpers', 'Changed group to "%s" (%s)', config.group, process.getgid());
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} catch (E) {
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log.info('PrivilegeHelpers', 'Failed to change group to "%s" (%s)', config.group, E.message);
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}
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}
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if (config.user) {
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try {
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process.setuid(config.user);
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log.info('PrivilegeHelpers', 'Changed user to "%s" (%s)', config.user, process.getuid());
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} catch (E) {
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log.info('PrivilegeHelpers', 'Failed to change user to "%s" (%s)', config.user, E.message);
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}
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}
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}
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module.exports = {
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dropRootPrivileges,
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ensureMailtrainOwner,
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getConfigUidGid,
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getConfigROUidGid
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};
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