Cannot require() a FIFO

[alxndrsn]

Version

• v22.14.0
• v24.10.0

Platform

6.8.0-85-generic #85~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 19 16:18:59 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

Subsystem

require?

What steps will reproduce the bug?

$ node -e 'const [,f] = process.argv; console.log(require(f))' <(echo 'console.log("hi")')
node:fs:442
    return binding.readFileUtf8(path, stringToFlags(options.flag));
                   ^

Error: ENOENT: no such file or directory, open '/proc/5569/fd/pipe:[27076]'
    at Object.readFileSync (node:fs:442:20)
    at loadSource (node:internal/modules/cjs/loader:1581:17)
    at Object..js (node:internal/modules/cjs/loader:1700:44)
    at Module.load (node:internal/modules/cjs/loader:1289:32)
    at Function._load (node:internal/modules/cjs/loader:1108:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:220:24)
    at Module.require (node:internal/modules/cjs/loader:1311:12)
    at require (node:internal/modules/helpers:136:16)
    at [eval]:1:40 {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/proc/5569/fd/pipe:[27076]'
}

Node.js v22.14.0

How often does it reproduce? Is there a required condition?

100%.

What is the expected behavior? Why is that the expected behavior?

Should just require the code and print hi to stdout.

What do you see instead?

$ node -e 'const [,f] = process.argv; console.log(require(f))' <(echo 'console.log("hi")')
node:fs:442
    return binding.readFileUtf8(path, stringToFlags(options.flag));
                   ^

Error: ENOENT: no such file or directory, open '/proc/5569/fd/pipe:[27076]'
    at Object.readFileSync (node:fs:442:20)
    at loadSource (node:internal/modules/cjs/loader:1581:17)
    at Object..js (node:internal/modules/cjs/loader:1700:44)
    at Module.load (node:internal/modules/cjs/loader:1289:32)
    at Function._load (node:internal/modules/cjs/loader:1108:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:220:24)
    at Module.require (node:internal/modules/cjs/loader:1311:12)
    at require (node:internal/modules/helpers:136:16)
    at [eval]:1:40 {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/proc/5569/fd/pipe:[27076]'
}

Node.js v22.14.0

Additional information

This works fine:

$ node -e 'const [,f] = process.argv; console.log(require("node:fs").readFileSync(f, "utf8"))' <(echo 'console.log("hi")')
console.log("hi")

[Renegade334]

This needs --preserve-symlinks. node is being passed a symlink to an anonymous pipe from the process substitution, which can't be resolved to an absolute path.

[alxndrsn]

Thanks @Renegade334 - --preserve-symlinks does the job. Presumably this is working as expected 👍