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 }