129 lines
3.2 KiB
Plaintext
129 lines
3.2 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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/**
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* Subset of POSIX.1-2017 getconf — fixed values for Bare OS (no host sysconf).
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* Unknown names exit with status 1 (matches common getconf for invalid var).
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*/
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const CONF = {
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PATH_MAX: '4096',
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NAME_MAX: '255',
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/** POSIX minimum for ARG_MAX; Bare uses a conservative cap for runBinCommand argv. */
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_POSIX_ARG_MAX: '4096',
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ARG_MAX: '262144',
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LINE_MAX: '2048',
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/** POSIX.1-2008 */
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_POSIX_VERSION: '200809',
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_POSIX2_VERSION: '200809',
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NGROUPS_MAX: '32',
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OPEN_MAX: '256',
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STREAM_MAX: '256',
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TZNAME_MAX: '32',
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_POSIX_CHOWN_RESTRICTED: '1',
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_POSIX_NO_TRUNC: '1',
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_POSIX_VDISABLE: '0',
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_POSIX_JOB_CONTROL: '0',
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_POSIX_SAVED_IDS: '0',
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/** Bare shell line length (reasonable REPL limit, not a hard kernel cap). */
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BARE_OS_INPUT_LINE_MAX: '8192'
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}
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async function run(ctx, argv) {
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const args = argv.slice(1).filter((a) => a !== '--')
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let dumpAll = false
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let name = null
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for (const a of args) {
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if (a === '-a') dumpAll = true
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else if (!a.startsWith('-')) name = a
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else {
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ctx.console.error('getconf: unknown option: ' + a)
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ctx.exitCode = 1
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return
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}
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}
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if (dumpAll) {
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for (const k of Object.keys(CONF).sort()) {
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ctx.console.log(k + '\n' + CONF[k])
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}
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ctx.exitCode = 0
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return
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}
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if (!name) {
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ctx.console.error('usage: getconf [-a] system_var')
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ctx.exitCode = 1
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return
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}
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if (Object.prototype.hasOwnProperty.call(CONF, name)) {
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ctx.console.log(CONF[name])
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ctx.exitCode = 0
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return
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}
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ctx.console.error('getconf: ' + name + ': unknown variable')
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ctx.exitCode = 1
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}
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