forked from olcxjas-softworks/LarpixClient
51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
var fs = require('fs')
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/**
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* Provides symlink loop detection to directory traversal algorithm.
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*/
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module.exports = {
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detectLoop: function (entry, symlinkCache) {
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if (entry && entry.isSymlink) {
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var realPath = fs.realpathSync(entry.absolutePath)
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if (symlinkCache[realPath]) {
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return true
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}
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}
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return false
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},
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initSymlinkCache: function() {
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return {
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dir1: {},
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dir2: {}
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}
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},
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updateSymlinkCache: function(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2) {
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var symlinkCachePath1, symlinkCachePath2
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if (rootEntry1 && !loopDetected1) {
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symlinkCachePath1 = rootEntry1.isSymlink ? fs.realpathSync(rootEntry1.absolutePath) : rootEntry1.absolutePath
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symlinkCache.dir1[symlinkCachePath1] = true
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}
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if (rootEntry2 && !loopDetected2) {
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symlinkCachePath2 = rootEntry2.isSymlink ? fs.realpathSync(rootEntry2.absolutePath) : rootEntry2.absolutePath
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symlinkCache.dir2[symlinkCachePath2] = true
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}
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},
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cloneSymlinkCache: function (symlinkCache) {
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return {
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dir1: shallowClone(symlinkCache.dir1),
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dir2: shallowClone(symlinkCache.dir2)
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}
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},
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}
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function shallowClone(obj) {
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var cloned = {}
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Object.keys(obj).forEach(function (key) {
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cloned[key] = obj[key]
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})
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return cloned
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}
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