Updates

packages/bare-os-coreutils/lib/commands.mjs

@@ -16,6 +16,7 @@ export const COREUTILS_COMMANDS = [
   'cksum',
   'clear',
   'comm',
+  'cmp',
   'cp',
   'crontab',
   'cut',

packages/bare-os-coreutils/man/pages/cmp.json

@@ -0,0 +1,16 @@
+{
+  "name": "cmp",
+  "section": 1,
+  "title": "compare two files",
+  "synopsis": ["cmp [-s] FILE1 FILE2"],
+  "description": "Byte-wise comparison of two regular files. Exit 0 if identical, 1 if different, 2 on error. -s suppresses output.",
+  "options": [
+    {
+      "flag": "-s, --silent",
+      "meaning": "No output; only set exit status"
+    }
+  ],
+  "keywords": ["cmp", "bare-os", "coreutils"],
+  "examples": [{ "caption": "basic", "code": "cmp a.txt b.txt" }],
+  "listCategory": "coreutils"
+}

packages/bare-os-coreutils/src/cmp.js

@@ -0,0 +1,46 @@
+async function run(ctx, argv) {
+  const silent = argv.includes('-s') || argv.includes('--silent')
+  const args = argv.filter((a) => !a.startsWith('-'))
+  const a = args[0]
+  const b = args[1]
+  if (!a || !b) {
+    ctx.console.error('usage: cmp [-s] file1 file2')
+    ctx.exitCode = 2
+    return
+  }
+  const vfs = ctx.vfs
+  let x
+  let y
+  try {
+    x = await vfs.readFile(a)
+    y = await vfs.readFile(b)
+  } catch (e) {
+    ctx.console.error('cmp: ' + ((e && e.message) || String(e)))
+    ctx.exitCode = 2
+    return
+  }
+  if (!x && !y) {
+    ctx.exitCode = 0
+    return
+  }
+  if (!x || !y) {
+    if (!silent) ctx.console.error('cmp: EOF on ' + (!x ? a : b))
+    ctx.exitCode = 1
+    return
+  }
+  const bx = ctx.b4a.toString(x)
+  const by = ctx.b4a.toString(y)
+  if (bx === by) {
+    ctx.exitCode = 0
+    return
+  }
+  if (!silent) {
+    const lim = Math.min(bx.length, by.length)
+    let pos = 0
+    while (pos < lim && bx.charCodeAt(pos) === by.charCodeAt(pos)) pos++
+    ctx.console.error(
+      `${a} ${b} differ: char ${pos + 1}, line 1`
+    )
+  }
+  ctx.exitCode = 1
+}