			module.exports = isexe
			isexe.sync = sync

			var fs = require('fs')

			function isexe (path, options, cb) {
			fs.stat(path, function (er, stat) {
			cb(er, er ? false : checkStat(stat, options))
			})
			}

			function sync (path, options) {
			return checkStat(fs.statSync(path), options)
			}

			function checkStat (stat, options) {
			return stat.isFile() && checkMode(stat, options)
			}

			function checkMode (stat, options) {
			var mod = stat.mode
			var uid = stat.uid
			var gid = stat.gid

			var myUid = options.uid !== undefined ?
			options.uid : process.getuid && process.getuid()
			var myGid = options.gid !== undefined ?
			options.gid : process.getgid && process.getgid()

			var u = parseInt('100', 8)
			var g = parseInt('010', 8)
			var o = parseInt('001', 8)
			var ug = u \| g

			var ret = (mod & o) \|\|
			(mod & g) && gid === myGid \|\|
			(mod & u) && uid === myUid \|\|
			(mod & ug) && myUid === 0

			return ret
			}

rOACCT/node_modules/isexe/mode.js
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mode.js
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