68 lines
1.6 KiB
JavaScript
68 lines
1.6 KiB
JavaScript
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// commands for handling umask
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var util = require("util")
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var log = require("npmlog")
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var defaultUmask = 0022
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var defaultUmaskString = toString(defaultUmask)
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exports.toString = toString
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exports.fromString = fromString
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exports.validate = validate
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function toString(val) {
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val = val.toString(8)
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while (val.length < 4) val = "0" + val
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return val
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}
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function validate (data, k, val) {
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// must be either an integer or an octal string.
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if (typeof val === "number") {
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data[k] = val
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return true
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}
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if (typeof val === "string") {
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if (val.charAt(0) !== "0" || isNaN(val)) return false
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data[k] = parseInt(val, 8)
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return true
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}
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return false
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}
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function fromString(val, cb) {
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// synchronous callback, no zalgo
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_fromString(val, cb || function (err, result) {
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if (err) log.warn("invalid umask", err.message)
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val = result
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})
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return val
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}
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function _fromString(val, cb) {
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if(typeof val === "string") {
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if (!/^[0-7]+$/.test(val)) {
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return cb(new Error(util.format("Expected octal string, got %j, defaulting to %j",
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val, defaultUmaskString)),
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defaultUmask)
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}
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val = parseInt(val, 8)
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} else if(typeof val !== "number") {
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return cb(new Error(util.format("Expected number or octal string, got %j, defaulting to %j",
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val, defaultUmaskString)),
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defaultUmask)
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}
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if ((val < 0) || (val > 511)) {
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return cb(new Error(util.format("Must be in range 0..511 (0000..0777), got %j", val)),
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defaultUmask)
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}
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cb(null, val)
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}
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