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
}
