94 lines
2.5 KiB
Plaintext
94 lines
2.5 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 =
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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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async function evalTest(ctx, args) {
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if (!args.length) return false
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if (args[0] === '!') {
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const inner = await evalTest(ctx, args.slice(1))
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return !inner
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}
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if (args.length === 3) {
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const [a, op, b] = args
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if (op === '=') return a === b
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if (op === '!=') return a !== b
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return false
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}
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if (args.length === 2) {
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const op = args[0]
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const p = args[1]
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const st = await ctx.vfs.stat(p)
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if (op === '-e' || op === '-a') return st != null
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if (op === '-f') return st != null && st.type === 'file'
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if (op === '-d') return st != null && st.type === 'directory'
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if (op === '-z') return p.length === 0
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if (op === '-n') return p.length > 0
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return false
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}
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if (args.length === 1) return args[0] !== ''
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return false
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}
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async function run(ctx, argv) {
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ctx.exitCode = (await evalTest(ctx, argv.slice(1))) ? 0 : 1
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}
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