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Diffstat (limited to 'deps/npm/node_modules/tar/tar.js')
-rw-r--r-- | deps/npm/node_modules/tar/tar.js | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/deps/npm/node_modules/tar/tar.js b/deps/npm/node_modules/tar/tar.js new file mode 100644 index 00000000000..b9dbca489c0 --- /dev/null +++ b/deps/npm/node_modules/tar/tar.js @@ -0,0 +1,172 @@ +// field paths that every tar file must have. +// header is padded to 512 bytes. +var f = 0 + , fields = {} + , path = fields.path = f++ + , mode = fields.mode = f++ + , uid = fields.uid = f++ + , gid = fields.gid = f++ + , size = fields.size = f++ + , mtime = fields.mtime = f++ + , cksum = fields.cksum = f++ + , type = fields.type = f++ + , linkpath = fields.linkpath = f++ + , headerSize = 512 + , blockSize = 512 + , fieldSize = [] + +fieldSize[path] = 100 +fieldSize[mode] = 8 +fieldSize[uid] = 8 +fieldSize[gid] = 8 +fieldSize[size] = 12 +fieldSize[mtime] = 12 +fieldSize[cksum] = 8 +fieldSize[type] = 1 +fieldSize[linkpath] = 100 + +// "ustar\0" may introduce another bunch of headers. +// these are optional, and will be nulled out if not present. + +var ustar = fields.ustar = f++ + , ustarver = fields.ustarver = f++ + , uname = fields.uname = f++ + , gname = fields.gname = f++ + , devmaj = fields.devmaj = f++ + , devmin = fields.devmin = f++ + , prefix = fields.prefix = f++ + , fill = fields.fill = f++ + +// terminate fields. +fields[f] = null + +fieldSize[ustar] = 6 +fieldSize[ustarver] = 2 +fieldSize[uname] = 32 +fieldSize[gname] = 32 +fieldSize[devmaj] = 8 +fieldSize[devmin] = 8 +fieldSize[prefix] = 155 +fieldSize[fill] = 12 + +// nb: prefix field may in fact be 130 bytes of prefix, +// a null char, 12 bytes for atime, 12 bytes for ctime. +// +// To recognize this format: +// 1. prefix[130] === ' ' or '\0' +// 2. atime and ctime are octal numeric values +// 3. atime and ctime have ' ' in their last byte + +var fieldEnds = {} + , fieldOffs = {} + , fe = 0 +for (var i = 0; i < f; i ++) { + fieldOffs[i] = fe + fieldEnds[i] = (fe += fieldSize[i]) +} + +// build a translation table of field paths. +Object.keys(fields).forEach(function (f) { + if (fields[f] !== null) fields[fields[f]] = f +}) + +// different values of the 'type' field +// paths match the values of Stats.isX() functions, where appropriate +var types = + { 0: "File" + , "\0": "OldFile" // like 0 + , 1: "Link" + , 2: "SymbolicLink" + , 3: "CharacterDevice" + , 4: "BlockDevice" + , 5: "Directory" + , 6: "FIFO" + , 7: "ContiguousFile" // like 0 + // posix headers + , g: "GlobalExtendedHeader" // k=v for the rest of the archive + , x: "ExtendedHeader" // k=v for the next file + // vendor-specific stuff + , A: "SolarisACL" // skip + , D: "GNUDumpDir" // like 5, but with data, which should be skipped + , I: "Inode" // metadata only, skip + , K: "NextFileHasLongLinkpath" // data = link path of next file + , L: "NextFileHasLongPath" // data = path of next file + , M: "ContinuationFile" // skip + , N: "OldGnuLongPath" // like L + , S: "SparseFile" // skip + , V: "TapeVolumeHeader" // skip + , X: "OldExtendedHeader" // like x + } + +Object.keys(types).forEach(function (t) { + types[types[t]] = types[types[t]] || t +}) + +// values for the mode field +var modes = + { suid: 04000 // set uid on extraction + , sgid: 02000 // set gid on extraction + , svtx: 01000 // set restricted deletion flag on dirs on extraction + , uread: 0400 + , uwrite: 0200 + , uexec: 0100 + , gread: 040 + , gwrite: 020 + , gexec: 010 + , oread: 4 + , owrite: 2 + , oexec: 1 + , all: 07777 + } + +var numeric = + { mode: true + , uid: true + , gid: true + , size: true + , mtime: true + , devmaj: true + , devmin: true + , cksum: true + , atime: true + , ctime: true + , dev: true + , ino: true + , nlink: true + } + +Object.keys(modes).forEach(function (t) { + modes[modes[t]] = modes[modes[t]] || t +}) + +var knownExtended = + { atime: true + , charset: true + , comment: true + , ctime: true + , gid: true + , gname: true + , linkpath: true + , mtime: true + , path: true + , realtime: true + , security: true + , size: true + , uid: true + , uname: true } + + +exports.fields = fields +exports.fieldSize = fieldSize +exports.fieldOffs = fieldOffs +exports.fieldEnds = fieldEnds +exports.types = types +exports.modes = modes +exports.numeric = numeric +exports.headerSize = headerSize +exports.blockSize = blockSize +exports.knownExtended = knownExtended + +exports.Pack = require("./lib/pack.js") +exports.Parse = require("./lib/parse.js") +exports.Extract = require("./lib/extract.js") |