148 lines
3.8 KiB
Plaintext
148 lines
3.8 KiB
Plaintext
/* BARE_OS_BIN_API 1.0.0 — bump when staged /bin script semantics change (see developer guide). */
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/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
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function bareStdin(ctx) {
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return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
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}
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/** @param {number} mode @param {'file' | 'directory' | 'symlink'} type */
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function bareFormatModeString(mode, type) {
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const typeChar = type === 'directory' ? 'd' : type === 'symlink' ? 'l' : '-'
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const perm = mode & 0o777
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const r = (bit) => (perm & bit ? 'r' : '-')
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const w = (bit) => (perm & bit ? 'w' : '-')
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const x = (bit) => (perm & bit ? 'x' : '-')
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return (
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typeChar +
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r(0o400) +
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w(0o200) +
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x(0o100) +
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r(0o040) +
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w(0o020) +
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x(0o010) +
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r(0o004) +
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w(0o002) +
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x(0o001)
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)
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}
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/** @param {number} mtimeMs @param {number} [nowMs] */
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function bareFormatLsMtime(mtimeMs, nowMs) {
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const now = nowMs != null ? nowMs : Date.now()
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const d = new Date(mtimeMs)
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const months = [
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'Jan',
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'Feb',
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'Mar',
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'Apr',
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'May',
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'Jun',
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'Jul',
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'Aug',
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'Sep',
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'Oct',
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'Nov',
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'Dec'
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]
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const mon = months[d.getMonth()]
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const day = String(d.getDate()).padStart(2, ' ')
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const sixMo = 180 * 24 * 3600 * 1000
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if (Math.abs(now - mtimeMs) > sixMo) {
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const yr = String(d.getFullYear()).padStart(4, ' ')
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return mon + ' ' + day + ' ' + yr
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}
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const hh = String(d.getHours()).padStart(2, '0')
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const mm = String(d.getMinutes()).padStart(2, '0')
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return mon + ' ' + day + ' ' + hh + ':' + mm
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}
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/** @param {number} size */
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function barePosixBlocks(size) {
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return Math.ceil(Number(size) / 512) || 0
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}
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/**
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* chgrp — change file group (Hyperdrive metadata on writable paths).
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*/
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/**
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* @param {string} spec
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* @param {Record<string, string>} env
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* @returns {number | null}
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*/
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function parseGroupSpec(spec, env) {
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const s = String(spec).trim()
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if (!s) return null
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if (/^\d+$/.test(s)) {
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const n = Number.parseInt(s, 10)
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return Number.isFinite(n) ? n : null
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}
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const g = (env.GROUP || env.USER || 'guest').trim()
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if (s === 'root') return 0
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if (s === 'guest' || s === 'nobody') return 65534
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if (g && s === g) {
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const gid = Number.parseInt(String(env.GID ?? '65534'), 10)
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return Number.isFinite(gid) ? gid : 65534
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}
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return null
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}
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async function run(ctx, argv) {
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let i = 1
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const files = []
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for (; i < argv.length; i++) {
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const a = argv[i]
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if (a === '-h' || a === '--help') {
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ctx.console.log(
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'usage: chgrp [-h] GROUP FILE...\n' +
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'GROUP may be a numeric gid or root/guest/nobody/current GROUP name.'
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)
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ctx.exitCode = 0
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return
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}
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if (!a.startsWith('-')) break
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ctx.console.error('chgrp: unsupported option: ' + a)
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ctx.exitCode = 1
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return
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}
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const groupSpec = argv[i++]
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if (!groupSpec || i >= argv.length) {
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ctx.console.error('usage: chgrp GROUP FILE...')
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ctx.exitCode = 1
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return
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}
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for (; i < argv.length; i++) files.push(argv[i])
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const gid = parseGroupSpec(groupSpec, ctx.vfs.env)
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if (gid == null) {
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ctx.console.error('chgrp: invalid group: ' + groupSpec)
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ctx.exitCode = 1
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return
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}
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const gname = /^\d+$/.test(groupSpec.trim())
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? undefined
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: groupSpec.trim() || undefined
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for (const f of files) {
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try {
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const st = await ctx.vfs.stat(f)
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if (!st) {
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ctx.console.error('chgrp: ' + f + ': No such file')
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ctx.exitCode = 1
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continue
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}
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if (typeof ctx.vfs.chown !== 'function') {
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ctx.console.error('chgrp: not supported by this VFS')
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ctx.exitCode = 1
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return
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}
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await ctx.vfs.chown(f, {
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uid: st.uid,
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gid,
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uname: st.user,
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gname
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})
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} catch (e) {
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ctx.console.error('chgrp: ' + f + ': ' + (e.message || e))
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ctx.exitCode = 1
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}
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}
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}
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