In environments where username not in /etc/passwd codex errors out

What version of Codex is running?

0.1.2505172129

Which model were you using?

Any

What platform is your computer?

Linux 5.14.0-503.21.1.el9_5.x86_64 x86_64 x86_64

What steps can reproduce the bug?

1. Run on a machine where users are not in /etc/passwd (e.g. auth is handled by LDAP)
2. Install node via Nix
3. Run node -e 'console.log(require("os").userInfo())'

Nix-provided Node (and glibc) only consults NSS modules installed in the Nix store (not /lib64/libnss_sss.so.2), even if you use FHS mode. When using SSSD/LDAP, only the system Node (linked to host glibc and NSS modules) will work for LDAP/NSS user lookups. Python sometimes "escapes" this problem, but Node never will in this setup.

See also https://nodejs.org/docs/latest-v22.x/api/os.html#os_os_userinfo_options

What is the expected behavior?

codex not to fail in these environments

What do you see instead?

codex --help
SystemError [ERR_SYSTEM_ERROR]: A system error occurred: uv_os_get_passwd returned ENOENT (no such file or directory)
    at Object.userInfo (node:os:359:11)
    at SOME_BASE_PATH/node_modules/@openai/codex/dist/cli.js:600:3739 {
  code: 'ERR_SYSTEM_ERROR',
  info: {
    errno: -2,
    code: 'ENOENT',
    message: 'no such file or directory',
    syscall: 'uv_os_get_passwd'
  },
  errno: [Getter/Setter: -2],
  syscall: [Getter/Setter: 'uv_os_get_passwd']
}

Additional information

Proposed solution:

Change agent-loop.ts line 1600 from:

const userName = os.userInfo().username;

To:

try {
  userName = os.userInfo().username;
} catch (error) {
  log("os.userInfo() failed, attempting to read username from environment variables:", error);
  userName = process.env["USER"] || "unknown_user";
  if (userName === "unknown_user") {
    log("Could not determine username from os.userInfo() or environment variable USER. Using default 'unknown_user'.");
  }
}