mirror of https://github.com/jkjoy/sunpeiwen.git
97 lines
2.2 KiB
JavaScript
97 lines
2.2 KiB
JavaScript
const { dirname, resolve } = require('path')
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const url = require('url')
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const fs = require('../fs.js')
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// given a path, find the owner of the nearest parent
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const find = async (path) => {
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// if we have no getuid, permissions are irrelevant on this platform
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if (!process.getuid) {
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return {}
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}
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// fs methods accept URL objects with a scheme of file: so we need to unwrap
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// those into an actual path string before we can resolve it
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const resolved = path != null && path.href && path.origin
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? resolve(url.fileURLToPath(path))
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: resolve(path)
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let stat
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try {
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stat = await fs.lstat(resolved)
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} finally {
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// if we got a stat, return its contents
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if (stat) {
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return { uid: stat.uid, gid: stat.gid }
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}
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// try the parent directory
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if (resolved !== dirname(resolved)) {
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return find(dirname(resolved))
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}
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// no more parents, never got a stat, just return an empty object
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return {}
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}
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}
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// given a path, uid, and gid update the ownership of the path if necessary
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const update = async (path, uid, gid) => {
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// nothing to update, just exit
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if (uid === undefined && gid === undefined) {
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return
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}
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try {
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// see if the permissions are already the same, if they are we don't
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// need to do anything, so return early
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const stat = await fs.stat(path)
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if (uid === stat.uid && gid === stat.gid) {
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return
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}
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} catch {
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// ignore errors
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}
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try {
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await fs.chown(path, uid, gid)
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} catch {
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// ignore errors
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}
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}
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// accepts a `path` and the `owner` property of an options object and normalizes
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// it into an object with numerical `uid` and `gid`
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const validate = async (path, input) => {
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let uid
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let gid
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if (typeof input === 'string' || typeof input === 'number') {
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uid = input
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gid = input
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} else if (input && typeof input === 'object') {
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uid = input.uid
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gid = input.gid
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}
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if (uid === 'inherit' || gid === 'inherit') {
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const owner = await find(path)
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if (uid === 'inherit') {
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uid = owner.uid
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}
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if (gid === 'inherit') {
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gid = owner.gid
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}
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}
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return { uid, gid }
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}
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module.exports = {
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find,
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update,
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validate,
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}
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