566 lines
15 KiB
Plaintext
566 lines
15 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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/** Session env map (`vfs.env`, then `ctx.env`). Never throws. */
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function bareOsEnv(ctx) {
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const v = ctx && ctx.vfs && ctx.vfs.env
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if (v && typeof v === 'object') return v
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const e = ctx && ctx.env
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if (e && typeof e === 'object') return e
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return {}
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}
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/**
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* Strict POSIX-ish decimal integer (no octal, no exponent, no empty).
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* @param {unknown} s
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* @returns {number}
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*/
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function bareOsParseDecInt(s) {
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const t = String(s == null ? '' : s).trim()
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if (!/^[+-]?(?:0|[1-9][0-9]*)$/.test(t)) return NaN
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const n = Number.parseInt(t, 10)
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return Number.isSafeInteger(n) ? n : NaN
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}
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/** @param {unknown} s */
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function bareOsParseNonNegInt(s) {
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const n = bareOsParseDecInt(s)
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return n >= 0 ? n : NaN
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}
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/**
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* @param {Record<string, unknown>} ctx
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* @param {string} name
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* @param {number} fallback
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* @param {number} [min]
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* @param {number} [max]
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*/
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function bareOsEnvInt(ctx, name, fallback, min, max) {
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const raw = bareOsEnv(ctx)[name]
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if (raw == null || raw === '') return fallback
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const n = Number.parseInt(String(raw), 10)
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if (!Number.isFinite(n)) return fallback
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let v = n
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if (min != null && v < min) v = min
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if (max != null && v > max) v = max
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return v
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}
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/**
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* @param {Record<string, unknown>} ctx
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* @param {string} msg
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* @param {number} [code]
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*/
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function bareOsFail(ctx, msg, code) {
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if (msg) ctx.console.error(msg)
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ctx.exitCode = code == null ? 1 : code
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}
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/** @param {unknown} e */
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function bareOsIsNotFoundErr(e) {
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const code = e && typeof e === 'object' ? e.code : ''
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if (code === 'ENOENT') return true
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const msg = String((e && e.message) || e || '')
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return /ENOENT|No such file|not found/i.test(msg)
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}
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/**
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* @param {Record<string, unknown>} ctx
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* @param {unknown} buf
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* @returns {Uint8Array}
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*/
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function bareOsToU8(ctx, buf) {
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if (!buf) return new Uint8Array(0)
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if (buf instanceof Uint8Array) return buf
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if (ctx && ctx.b4a && typeof ctx.b4a.from === 'function') return ctx.b4a.from(buf)
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return new Uint8Array(buf)
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}
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/** @param {string} dir @param {string} name */
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function bareOsJoinPath(dir, name) {
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const d = String(dir || '').replace(/\/+$/, '')
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const n = String(name || '').replace(/^\/+/, '')
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if (!d || d === '/') return '/' + n
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return d + '/' + n
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}
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/** @param {string} p */
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function bareOsBaseName(p) {
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const t = String(p || '').replace(/\/+$/, '')
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if (!t || t === '/') return t === '/' ? '/' : ''
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const i = t.lastIndexOf('/')
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return i < 0 ? t : t.slice(i + 1) || t
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}
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/** @param {string} p */
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function bareOsParentDir(p) {
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const t = String(p || '').replace(/\/+$/, '') || '/'
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if (t === '/') return '/'
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const i = t.lastIndexOf('/')
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return i <= 0 ? '/' : t.slice(0, i) || '/'
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}
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/** @param {string} p */
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function bareOsNormPath(p) {
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return String(p || '').replace(/\/+$/, '') || '/'
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}
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/**
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* @param {Record<string, unknown>} ctx
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* @param {string} p
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*/
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function bareOsResolvePath(ctx, p) {
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if (ctx && ctx.vfs && typeof ctx.vfs.resolveLogical === 'function') {
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try {
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return String(ctx.vfs.resolveLogical(p) || p)
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} catch {
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/* fall through */
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}
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}
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return String(p || '')
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}
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/**
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* True when dest is src or lives under src (self-copy / self-move).
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* @param {Record<string, unknown>} ctx
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* @param {string} src
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* @param {string} dest
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*/
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function bareOsDestInsideSrc(ctx, src, dest) {
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const s = bareOsNormPath(bareOsResolvePath(ctx, src))
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const d = bareOsNormPath(bareOsResolvePath(ctx, dest))
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if (s === d) return true
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if (s === '/') return d !== '/'
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return d === s || d.startsWith(s + '/')
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}
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const BARE_OS_B64_ALPH =
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
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/** @param {Uint8Array} u8 */
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function bareOsB64Encode(u8) {
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let out = ''
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let i = 0
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for (; i + 2 < u8.length; i += 3) {
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const n = (u8[i] << 16) | (u8[i + 1] << 8) | u8[i + 2]
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out +=
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BARE_OS_B64_ALPH[(n >> 18) & 63] +
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BARE_OS_B64_ALPH[(n >> 12) & 63] +
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BARE_OS_B64_ALPH[(n >> 6) & 63] +
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BARE_OS_B64_ALPH[n & 63]
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}
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const rest = u8.length - i
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if (rest === 1) {
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const n = u8[i] << 16
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out += BARE_OS_B64_ALPH[(n >> 18) & 63] + BARE_OS_B64_ALPH[(n >> 12) & 63] + '=='
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} else if (rest === 2) {
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const n = (u8[i] << 16) | (u8[i + 1] << 8)
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out +=
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BARE_OS_B64_ALPH[(n >> 18) & 63] +
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BARE_OS_B64_ALPH[(n >> 12) & 63] +
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BARE_OS_B64_ALPH[(n >> 6) & 63] +
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'='
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}
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return out
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}
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/**
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* RFC 4648 Base64 decode (also accepts URL-safe alphabet). Rejects junk.
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* @param {string} s
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* @returns {Uint8Array}
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*/
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function bareOsB64Decode(s) {
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const t = String(s).replace(/\s+/g, '')
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if (!t) return new Uint8Array(0)
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if (t.length % 4 === 1) throw new Error('invalid base64 length')
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let pad = 0
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if (t.endsWith('==')) pad = 2
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else if (t.endsWith('=')) pad = 1
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const body = pad ? t.slice(0, t.length - pad) : t
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const bytes = []
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let buf = 0
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let bits = 0
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for (let i = 0; i < body.length; i++) {
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const c = body[i]
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let v = BARE_OS_B64_ALPH.indexOf(c)
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if (v < 0) {
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if (c === '-') v = 62
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else if (c === '_') v = 63
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else throw new Error('invalid base64 character')
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}
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buf = (buf << 6) | v
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bits += 6
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if (bits >= 8) {
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bits -= 8
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bytes.push((buf >> bits) & 255)
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}
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}
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if (pad) {
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const want = Math.floor((body.length * 6) / 8)
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if (bytes.length > want) bytes.length = want
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}
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return new Uint8Array(bytes)
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}
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/**
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* @param {string} s
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* @returns {Uint8Array}
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*/
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function bareOsHexDecode(s) {
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const t = String(s).replace(/\s+/g, '')
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if (t.length % 2 !== 0) throw new Error('odd hex length')
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const out = new Uint8Array(t.length / 2)
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for (let i = 0; i < out.length; i++) {
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const pair = t.slice(i * 2, i * 2 + 2)
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if (!/^[0-9a-fA-F]{2}$/.test(pair)) throw new Error('invalid hex')
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out[i] = Number.parseInt(pair, 16)
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}
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return out
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}
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/** @param {Uint8Array} u8 */
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function bareOsHexEncode(u8) {
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let s = ''
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for (let i = 0; i < u8.length; i++) s += u8[i].toString(16).padStart(2, '0')
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return s
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}
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/**
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* Parse leading NAME=value assignments; first non-assignment starts the utility argv.
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* @param {string[]} rest
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* @returns {{ assigns: Record<string, string>, utility: string[] }}
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*/
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function parseEnvLeadingAssigns(rest) {
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const assigns = {}
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let i = 0
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for (; i < rest.length; i++) {
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const a = rest[i]
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const eq = a.indexOf('=')
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if (eq <= 0) break
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const name = a.slice(0, eq)
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if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(name)) break
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assigns[name] = a.slice(eq + 1)
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}
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return { assigns, utility: rest.slice(i) }
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}
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/**
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* GNU-like splitting for `env -S` (bounded).
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* @param {string} s
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* @returns {string[] | null}
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*/
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function splitEnvDashS(s) {
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const maxStr = 4096
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const maxArgs = 64
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if (typeof s !== 'string' || s.length > maxStr) return null
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/** @type {string[]} */
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const out = []
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let i = 0
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while (i < s.length) {
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while (i < s.length && /\s/.test(s[i])) i++
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if (i >= s.length) break
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if (out.length >= maxArgs) return null
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/** @type {string} */
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let arg = ''
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const q = s[i]
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if (q === "'" || q === '"') {
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i++
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while (i < s.length && s[i] !== q) {
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if (q === '"' && s[i] === '\\' && i + 1 < s.length) {
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arg += s[i + 1]
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i += 2
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continue
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}
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arg += s[i++]
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}
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if (s[i] !== q) return null
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i++
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} else {
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while (i < s.length && !/\s/.test(s[i])) arg += s[i++]
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}
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out.push(arg)
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}
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return out
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}
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/**
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* Subset: KEY=VAL lines, # comments, optional leading `export `.
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* @param {string} text
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* @returns {Record<string, string>}
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*/
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function parseEnvFileSubset(text) {
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/** @type {Record<string, string>} */
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const out = {}
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let lines = 0
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const maxLines = 512
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for (const raw of text.split(/\r?\n/)) {
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if (lines++ > maxLines) break
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const line = raw.trim()
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if (!line || line.startsWith('#')) continue
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let t = line
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if (/^export\s+/i.test(t)) t = t.replace(/^export\s+/i, '')
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const eq = t.indexOf('=')
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if (eq <= 0) continue
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const name = t.slice(0, eq).trim()
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if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(name)) continue
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let val = t.slice(eq + 1)
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if (
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(val.startsWith('"') && val.endsWith('"')) ||
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(val.startsWith("'") && val.endsWith("'"))
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) {
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val = val.slice(1, -1)
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}
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if (val.length > 8192) val = val.slice(0, 8192)
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out[name] = val
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}
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return out
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}
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/**
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* @param {Record<string, unknown>} ctx
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* @param {string} path
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* @returns {Promise<Record<string, string>>}
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*/
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async function readEnvFileIntoAssigns(ctx, path) {
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const vfs = ctx.vfs
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if (!vfs || typeof vfs.readFile !== 'function') {
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throw new Error('vfs.readFile unavailable')
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}
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const buf = await vfs.readFile(path)
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if (!buf) throw new Error(path + ': No such file')
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const text = ctx.b4a.toString(buf)
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return parseEnvFileSubset(text)
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}
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async function run(ctx, argv) {
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const dashSOn =
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ctx.vfs?.env?.BARE_OS_ENV_DASH_S === '1' ||
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ctx.vfs?.env?.BARE_OS_ENV_DASH_S === 'true'
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let ignore = false
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let i = 1
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/** @type {string[]} */
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const splitPrefix = []
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/** @type {Record<string, string>} */
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const fileAssigns = {}
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for (; i < argv.length; i++) {
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const a = argv[i]
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if (a === '--') {
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i++
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break
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}
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if (a === '-i' || a === '--ignore-environment') {
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ignore = true
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continue
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}
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if (dashSOn && a === '-S') {
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const next = argv[i + 1]
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if (next == null) {
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ctx.console.error('env: option requires an argument -- S')
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ctx.exitCode = 1
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return
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}
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const parts = splitEnvDashS(String(next))
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if (!parts) {
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ctx.console.error('env: invalid -S string')
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ctx.exitCode = 1
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return
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}
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splitPrefix.push(...parts)
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i++
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continue
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}
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|
if (dashSOn && a.startsWith('-S=')) {
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const parts = splitEnvDashS(a.slice(3))
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if (!parts) {
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ctx.console.error('env: invalid -S string')
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ctx.exitCode = 1
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return
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}
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splitPrefix.push(...parts)
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continue
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}
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|
if (dashSOn && a === '--split-string') {
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const next = argv[i + 1]
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if (next == null) {
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ctx.console.error('env: option requires an argument -- split-string')
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ctx.exitCode = 1
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return
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}
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const parts = splitEnvDashS(String(next))
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if (!parts) {
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ctx.console.error('env: invalid --split-string')
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ctx.exitCode = 1
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return
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}
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splitPrefix.push(...parts)
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i++
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continue
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}
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if (dashSOn && a.startsWith('--split-string=')) {
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const parts = splitEnvDashS(a.slice('--split-string='.length))
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if (!parts) {
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ctx.console.error('env: invalid --split-string')
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ctx.exitCode = 1
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return
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}
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splitPrefix.push(...parts)
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continue
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}
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|
if (dashSOn && a === '--env-file') {
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const next = argv[i + 1]
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if (next == null) {
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ctx.console.error('env: option requires an argument -- env-file')
|
|
ctx.exitCode = 1
|
|
return
|
|
}
|
|
try {
|
|
Object.assign(fileAssigns, await readEnvFileIntoAssigns(ctx, String(next)))
|
|
} catch (e) {
|
|
ctx.console.error('env: ' + ((e && e.message) || e))
|
|
ctx.exitCode = 1
|
|
return
|
|
}
|
|
i++
|
|
continue
|
|
}
|
|
if (dashSOn && a.startsWith('--env-file=')) {
|
|
const p = a.slice('--env-file='.length)
|
|
try {
|
|
Object.assign(fileAssigns, await readEnvFileIntoAssigns(ctx, p))
|
|
} catch (e) {
|
|
ctx.console.error('env: ' + ((e && e.message) || e))
|
|
ctx.exitCode = 1
|
|
return
|
|
}
|
|
continue
|
|
}
|
|
if (a.startsWith('-')) {
|
|
ctx.console.error('env: unsupported option ' + a)
|
|
ctx.exitCode = 1
|
|
return
|
|
}
|
|
break
|
|
}
|
|
const rest = argv.slice(i)
|
|
const mergedRest = [...splitPrefix, ...rest]
|
|
const { assigns, utility } = parseEnvLeadingAssigns(mergedRest)
|
|
const base = ignore ? {} : { ...ctx.vfs.env }
|
|
const newEnv = Object.assign(base, fileAssigns, assigns)
|
|
|
|
if (!utility.length) {
|
|
for (const k of Object.keys(newEnv).sort()) {
|
|
ctx.console.log(k + '=' + (newEnv[k] ?? ''))
|
|
}
|
|
return
|
|
}
|
|
|
|
if (typeof ctx.runBinCommand !== 'function') {
|
|
ctx.console.error(
|
|
'env: ctx.runBinCommand is not available (requires a Bare OS booter session)'
|
|
)
|
|
ctx.exitCode = 1
|
|
return
|
|
}
|
|
|
|
const oldEnv = ctx.vfs.env
|
|
ctx.vfs.env = newEnv
|
|
if (ctx.env && typeof ctx.env === 'object') ctx.env = newEnv
|
|
try {
|
|
ctx.exitCode = 0
|
|
await ctx.runBinCommand(utility)
|
|
} catch (e) {
|
|
ctx.console.error('env: ' + ((e && e.message) || e))
|
|
if (!ctx.exitCode) ctx.exitCode = 1
|
|
} finally {
|
|
ctx.vfs.env = oldEnv
|
|
if (ctx.env && typeof ctx.env === 'object') ctx.env = oldEnv
|
|
}
|
|
}
|