258 lines
7.3 KiB
Plaintext
258 lines
7.3 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 run(ctx, argv) {
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let human = 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 === '--help') {
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ctx.console.log(
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'usage: df [-h] [FILE]...\nSynthetic disk free for Bare OS (Hyperdrive model; not block devices).'
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)
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return
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}
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if (a === '-h' || a === '--human-readable') {
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human = true
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continue
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}
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if (a.startsWith('-')) {
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ctx.console.error('df: 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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function fmtK(n) {
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if (!human) return String(n)
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if (n < 1024) return n + 'K'
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if (n < 1024 * 1024) return (n / 1024).toFixed(1) + 'M'
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return (n / 1024 / 1024).toFixed(1) + 'G'
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}
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function parseMounts(text) {
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const out = []
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const lines = String(text || '')
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.split('\n')
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.map((s) => s.trim())
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.filter(Boolean)
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for (const line of lines) {
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const cols = line.split(/\s+/)
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if (cols.length < 4) continue
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out.push({
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filesystem: cols[0],
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mountpoint: cols[1],
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fstype: cols[2],
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options: cols[3]
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})
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}
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return out
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}
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function normalizePath(p) {
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const s = String(p || '').trim()
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if (!s) return '/'
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if (s === '/') return '/'
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return s.replace(/\/+$/, '') || '/'
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}
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function mountForPath(p, mounts) {
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const path = normalizePath(p)
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let best = null
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for (const m of mounts) {
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const mp = normalizePath(m.mountpoint)
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if (mp === '/') {
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if (!best) best = m
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continue
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}
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if (path === mp || path.startsWith(mp + '/')) {
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if (!best || mp.length > normalizePath(best.mountpoint).length) best = m
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}
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}
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return best
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}
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function statsFromSv(sv, fallbackTotalK, fallbackUsedK) {
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if (sv && typeof sv.f_blocks === 'number' && typeof sv.f_bfree === 'number') {
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const bsize = typeof sv.f_bsize === 'number' ? sv.f_bsize : 4096
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const totalK = Math.max(1024, Math.ceil((sv.f_blocks * bsize) / 1024))
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const freeB = sv.f_bavail ?? sv.f_bfree
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const freeK = Math.max(0, Math.ceil((freeB * bsize) / 1024))
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const usedK = Math.max(0, totalK - freeK)
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return { totalK, usedK, freeK }
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}
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const totalK = Math.max(1024, Number(fallbackTotalK) || 1024)
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const usedK = Math.max(0, Number(fallbackUsedK) || 0)
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return { totalK, usedK, freeK: Math.max(0, totalK - usedK) }
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}
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let totalK = 1024 * 1024
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let usedK = 4096
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/** @type {Record<string, unknown> | null} */
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let resources = null
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try {
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const buf = await ctx.vfs.readFile('/proc/bare_os_quotas')
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if (buf) {
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const j = JSON.parse(ctx.b4a.toString(buf))
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if (j && typeof j.pipelineMaxBytes === 'number')
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totalK = Math.max(1024, Math.ceil(j.pipelineMaxBytes / 1024) * 1024)
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}
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} catch {
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/* ignore */
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}
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try {
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const rbuf = await ctx.vfs.readFile('/proc/bare_os_resources')
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if (rbuf) {
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const j = JSON.parse(ctx.b4a.toString(rbuf))
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resources = j && typeof j === 'object' ? j : null
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const sv = j && j.statvfs
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const st = statsFromSv(sv, totalK, usedK)
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totalK = st.totalK
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usedK = st.usedK
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}
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} catch {
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/* ignore */
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}
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/** @type {{ filesystem: string, mountpoint: string, fstype: string, options: string }[]} */
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let mounts = []
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try {
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const mbuf = await ctx.vfs.readFile('/proc/mounts')
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if (mbuf) mounts = parseMounts(ctx.b4a.toString(mbuf))
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} catch {
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/* ignore */
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}
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if (!mounts.length) {
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mounts = [
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{ filesystem: 'bare-hyperdrive', mountpoint: '/', fstype: 'hyperdrive', options: 'ro' }
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]
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}
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/** @type {typeof mounts} */
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let selected = mounts
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if (paths.length) {
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const byMount = new Map()
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for (const p of paths) {
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const m = mountForPath(p, mounts)
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if (m) byMount.set(normalizePath(m.mountpoint), m)
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}
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selected = [...byMount.values()]
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}
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if (!selected.length) {
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ctx.console.error('df: no matching filesystems')
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ctx.exitCode = 1
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return
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}
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const sv =
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resources &&
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typeof resources === 'object' &&
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resources.statvfs &&
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typeof resources.statvfs === 'object'
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? resources.statvfs
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: null
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const sysSv =
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sv && typeof sv.systemDrive === 'object' && sv.systemDrive
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? sv.systemDrive
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: sv
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const base = statsFromSv(sysSv, totalK, usedK)
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ctx.console.log('Filesystem 1K-blocks Used Available Use% Mounted on')
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for (const m of selected) {
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const st = base
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const pct = st.totalK > 0 ? Math.min(100, Math.round((st.usedK / st.totalK) * 100)) : 0
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ctx.console.log(
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String(m.filesystem || 'bare-hyperdrive').padEnd(15) +
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' ' +
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fmtK(st.totalK).padStart(12) +
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' ' +
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fmtK(st.usedK).padStart(8) +
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' ' +
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fmtK(st.freeK).padStart(10) +
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' ' +
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String(pct).padStart(3) +
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'% ' +
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String(m.mountpoint || '/')
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)
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}
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}
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