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41 lines
909 B
41 lines
909 B
module.exports = isexe |
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isexe.sync = sync |
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var fs = require('fs') |
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function isexe (path, options, cb) { |
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fs.stat(path, function (er, stat) { |
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cb(er, er ? false : checkStat(stat, options)) |
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}) |
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} |
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function sync (path, options) { |
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return checkStat(fs.statSync(path), options) |
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} |
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function checkStat (stat, options) { |
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return stat.isFile() && checkMode(stat, options) |
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} |
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function checkMode (stat, options) { |
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var mod = stat.mode |
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var uid = stat.uid |
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var gid = stat.gid |
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var myUid = options.uid !== undefined ? |
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options.uid : process.getuid && process.getuid() |
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var myGid = options.gid !== undefined ? |
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options.gid : process.getgid && process.getgid() |
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var u = parseInt('100', 8) |
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var g = parseInt('010', 8) |
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var o = parseInt('001', 8) |
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var ug = u | g |
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var ret = (mod & o) || |
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(mod & g) && gid === myGid || |
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(mod & u) && uid === myUid || |
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(mod & ug) && myUid === 0 |
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return ret |
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}
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