42 lines
909 B
JavaScript
42 lines
909 B
JavaScript
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
|
|
}
|