109 lines
3.0 KiB
Plaintext
109 lines
3.0 KiB
Plaintext
/** 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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function barePrintfFormat(fmt, args) {
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let ai = 0
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let o = ''
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for (let i = 0; i < fmt.length; i++) {
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if (fmt[i] !== '%') {
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o += fmt[i]
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continue
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}
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if (fmt[i + 1] === '%') {
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o += '%'
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i++
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continue
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}
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let j = i + 1
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while (j < fmt.length && /[0-9.#\-+ ]/.test(fmt[j])) j++
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const spec = fmt[j] || 's'
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const arg = args[ai++]
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if (spec === 's') o += String(arg)
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else if (spec === 'd' || spec === 'i') o += String(Math.trunc(Number(arg)))
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else if (spec === 'u') o += String(Math.trunc(Number(arg)) >>> 0)
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else if (spec === 'x') o += (Math.trunc(Number(arg)) >>> 0).toString(16)
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else if (spec === 'X') o += (Math.trunc(Number(arg)) >>> 0).toString(16).toUpperCase()
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else if (spec === 'o') o += (Math.trunc(Number(arg)) >>> 0).toString(8)
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else if (spec === 'c') o += String.fromCharCode(Number(arg) || 0)
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else if (spec === 'f') o += String(Number(arg))
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else o += String(arg)
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i = j
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}
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return o
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}
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async function run(ctx, argv) {
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if (argv.length < 2) {
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ctx.console.error('usage: printf FORMAT [ARG...]')
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ctx.exitCode = 1
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return
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}
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const fmt = argv[1]
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const args = argv.slice(2)
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let unescaped = fmt
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unescaped = unescaped.replace(/\\n/g, '\n')
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unescaped = unescaped.replace(/\\t/g, '\t')
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unescaped = unescaped.replace(/\\r/g, '\r')
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unescaped = unescaped.replace(/\\\\/g, '\\')
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ctx.console.log(barePrintfFormat(unescaped, args))
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}
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