From 85a6f1cfefa339bd285eea7690e422eed0c1ee01 Mon Sep 17 00:00:00 2001
From: mostafaroshdy1 <66712535+mostafaroshdy1@users.noreply.github.com>
Date: Sun, 9 Nov 2025 23:42:19 +0200
Subject: [PATCH 1/2] module: read from stdin when input is a pipe

Update the CommonJS module loader to detect when the input
filename is /dev/stdin and stdin is a pipe (FIFO). In such
cases, read directly from file descriptor 0 instead of
attempting to open the /proc/<pid>/fd/pipe:[...] path, which
can result in ENOENT errors.

This change ensures that running Node with piped input like:
  printf 'console.log(1)' | node /dev/stdin
works reliably on Linux systems.

Fixes: https://github.com/nodejs/node/issues/54200
---
 lib/internal/modules/cjs/loader.js          |  5 +++++
 test/parallel/test-typescript-stdin-pipe.js | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 test/parallel/test-typescript-stdin-pipe.js

diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js
index b8aac380da7974..74e1e8c5227bd3 100644
--- a/lib/internal/modules/cjs/loader.js
+++ b/lib/internal/modules/cjs/loader.js
@@ -1135,6 +1135,11 @@ function defaultLoadImpl(filename, format) {
     case 'module-typescript':
     case 'commonjs-typescript':
     case 'typescript': {
+      const isPipePath = ['/dev/stdin', '/dev/fd/0'].includes(filename) ||
+                         (filename.startsWith('/proc/') && filename.includes('/fd/pipe:'));
+      if (isPipePath) {
+        return fs.readFileSync(0, 'utf8');
+      }
       return fs.readFileSync(filename, 'utf8');
     }
     case 'builtin':
diff --git a/test/parallel/test-typescript-stdin-pipe.js b/test/parallel/test-typescript-stdin-pipe.js
new file mode 100644
index 00000000000000..e144a3c8d57251
--- /dev/null
+++ b/test/parallel/test-typescript-stdin-pipe.js
@@ -0,0 +1,21 @@
+'use strict';
+const common = require('../common');
+
+if (common.isWindows || common.isAIX || common.isIBMi)
+  common.skip(`No /dev/stdin on ${process.platform}.`);
+
+const assert = require('assert');
+const { exec } = require('child_process');
+
+const tsCode = `
+const message = "JavaScript from pipe";
+console.log(message);
+`;
+
+
+const [cmd, opts] = common.escapePOSIXShell`echo ${tsCode} | ${process.execPath} /dev/stdin`;
+
+exec(cmd, opts, common.mustSucceed((stdout, stderr) => {
+  assert.strictEqual(stdout.trim(), 'JavaScript from pipe');
+  assert.strictEqual(stderr, '');
+}));

From 78959f7fddbb53ac960333bb2b9c197a841ca55d Mon Sep 17 00:00:00 2001
From: mostafaroshdy1 <66712535+mostafaroshdy1@users.noreply.github.com>
Date: Mon, 10 Nov 2025 01:31:49 +0200
Subject: [PATCH 2/2] test: replace echo with printf for reliable multi-line
 stdin piping

---
 test/parallel/test-typescript-stdin-pipe.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/parallel/test-typescript-stdin-pipe.js b/test/parallel/test-typescript-stdin-pipe.js
index e144a3c8d57251..741fa8c7bbab42 100644
--- a/test/parallel/test-typescript-stdin-pipe.js
+++ b/test/parallel/test-typescript-stdin-pipe.js
@@ -13,7 +13,7 @@ console.log(message);
 `;
 
 
-const [cmd, opts] = common.escapePOSIXShell`echo ${tsCode} | ${process.execPath} /dev/stdin`;
+const [cmd, opts] = common.escapePOSIXShell`printf "${tsCode}" | ${process.execPath} /dev/stdin`;
 
 exec(cmd, opts, common.mustSucceed((stdout, stderr) => {
   assert.strictEqual(stdout.trim(), 'JavaScript from pipe');