269 lines
7.6 KiB
Plaintext
269 lines
7.6 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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* Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
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* If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
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* @param {Record<string, unknown>} ctx
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* @param {string | Uint8Array} chunk
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* @returns {boolean}
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*/
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function bareOsEmitRaw(ctx, chunk) {
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if (typeof ctx.bareOsBinWrite === 'function') {
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const b4 = ctx.b4a
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const u8 =
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typeof chunk === 'string'
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? b4 && typeof b4.from === 'function'
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? b4.from(chunk)
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: new TextEncoder().encode(chunk)
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: chunk
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ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
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return true
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}
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const w = globalThis.process?.stdout?.write
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if (typeof w === 'function') {
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w.call(globalThis.process.stdout, chunk)
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return true
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}
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return false
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}
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async function copyPath(ctx, from, to, recursive, followSymlink, opts) {
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const preserve = opts && opts.preserveTime
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const update = opts && opts.update
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const verbose = opts && opts.verbose
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const st = await ctx.vfs.lstat(from)
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if (!st) {
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ctx.console.error('cp: ' + from + ': No such file')
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return false
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}
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if (st.type === 'symlink') {
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if (!followSymlink) {
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const t = await ctx.vfs.readlink(from)
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await ctx.vfs.symlink(t, to)
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if (verbose) ctx.console.log("'" + from + "' -> '" + to + "'")
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return true
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}
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const fst = await ctx.vfs.stat(from)
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if (fst.type === 'file') {
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const buf = await ctx.vfs.readFile(from)
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if (!buf) {
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ctx.console.error('cp: cannot read ' + from)
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return false
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}
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if (update) {
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const dst = await ctx.vfs.lstat(to)
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if (dst && dst.mtimeMs >= fst.mtimeMs) {
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if (verbose) ctx.console.log('skipped: ' + to)
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return true
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}
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}
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const wopts =
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preserve && typeof fst.mtimeMs === 'number'
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? { mtimeMs: fst.mtimeMs, ctimeMs: fst.ctimeMs }
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: {}
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await ctx.vfs.writeFile(to, buf, wopts)
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if (verbose) ctx.console.log("'" + from + "' -> '" + to + "'")
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return true
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}
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if (fst.type === 'directory') {
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if (!recursive) {
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ctx.console.error('cp: ' + from + ': Is a directory')
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return false
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}
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await ctx.vfs.mkdir(to, { recursive: true })
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const names = await ctx.vfs.readdir(from)
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for (const n of names) {
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if (n === '.bareos_empty') continue
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const f = from.replace(/\/+$/, '') + '/' + n
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const t = to.replace(/\/+$/, '') + '/' + n
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if (!(await copyPath(ctx, f, t, true, followSymlink, opts)))
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return false
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}
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if (verbose) ctx.console.log("'" + from + "' -> '" + to + "'")
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return true
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}
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ctx.console.error('cp: cannot copy special file ' + from)
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return false
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}
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if (st.type === 'file') {
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const buf = await ctx.vfs.readFile(from)
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if (!buf) {
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ctx.console.error('cp: cannot read ' + from)
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return false
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}
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if (update) {
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const dst = await ctx.vfs.lstat(to)
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if (dst && dst.mtimeMs >= st.mtimeMs) {
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if (verbose) ctx.console.log('skipped: ' + to)
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return true
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}
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}
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const wopts =
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preserve && typeof st.mtimeMs === 'number'
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? { mtimeMs: st.mtimeMs, ctimeMs: st.ctimeMs }
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: {}
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await ctx.vfs.writeFile(to, buf, wopts)
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if (verbose) ctx.console.log("'" + from + "' -> '" + to + "'")
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return true
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}
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if (st.type === 'directory') {
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if (!recursive) {
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ctx.console.error('cp: ' + from + ': Is a directory')
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return false
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}
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await ctx.vfs.mkdir(to, { recursive: true })
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const names = await ctx.vfs.readdir(from)
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for (const n of names) {
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if (n === '.bareos_empty') continue
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const f = from.replace(/\/+$/, '') + '/' + n
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const t = to.replace(/\/+$/, '') + '/' + n
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if (!(await copyPath(ctx, f, t, true, followSymlink, opts))) return false
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}
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if (verbose) ctx.console.log("'" + from + "' -> '" + to + "'")
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return true
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}
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return false
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}
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async function run(ctx, argv) {
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let recursive = false
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let followSymlink = false
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let update = false
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let verbose = false
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let preserveTime = false
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const paths = []
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for (let i = 1; i < argv.length; i++) {
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const a = argv[i]
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if (a === '-R' || a === '-r' || a === '--recursive') {
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recursive = true
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continue
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}
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if (a === '-L' || a === '--dereference') {
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followSymlink = true
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continue
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}
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if (a === '-P' || a === '--no-dereference') {
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followSymlink = false
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continue
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}
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if (a === '-u' || a === '--update') {
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update = true
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continue
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}
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if (a === '-v' || a === '--verbose') {
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verbose = true
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continue
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}
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if (a === '--preserve' || a === '-p') {
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preserveTime = true
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continue
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}
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if (a.startsWith('--preserve=')) {
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const v = a.slice('--preserve='.length)
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if (v === 'timestamps' || v === 'time' || v === 'all') preserveTime = true
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continue
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}
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if (a === '--') {
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paths.push(...argv.slice(i + 1))
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break
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}
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if (a.startsWith('-')) {
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ctx.console.error('cp: unsupported option ' + a)
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ctx.exitCode = 1
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return
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}
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paths.push(a)
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}
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if (paths.length < 2) {
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ctx.console.error(
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'usage: cp [-R] [-L|-P] [-u] [-v] [-p|--preserve[=timestamps]] SOURCE... DEST'
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)
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ctx.exitCode = 1
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return
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}
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const dest = paths.pop()
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const sources = paths
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let destIsDir = false
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try {
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const dst = await ctx.vfs.lstat(dest)
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destIsDir = !!(dst && dst.type === 'directory')
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} catch {
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destIsDir = false
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}
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if (sources.length > 1 && !destIsDir) {
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ctx.console.error('cp: target is not a directory')
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ctx.exitCode = 1
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return
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}
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const opts = { preserveTime, update, verbose }
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for (const src of sources) {
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const base = src.replace(/\/+$/, '').split('/').pop() || src
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const target =
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destIsDir || sources.length > 1
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? dest.replace(/\/+$/, '') + '/' + base
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: dest
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if (!(await copyPath(ctx, src, target, recursive, followSymlink, opts)))
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ctx.exitCode = 1
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}
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}
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