Bug #15429: Fix test failure if ENV["USER"] doesn't match Process.euid

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.6.0dev (2018-12-17 trunk 66427) [x86_64-openbsd]
• Backport: 2.4: UNKNOWN, 2.5: UNKNOWN

[jeremyevans0 (Jeremy Evans)]

When dropping privileges to run tests, ENV["USER"] could be set
to a user that doesn't match Process.euid, which causes
test_seteuid_name to fail with Errno::EPERM.

Attached is a patch that fixes this issue by trying to get the
name for the current euid, and only fallback to ENV["USER"] if
that doesn't work.

[normalperson (Eric Wong)]

• Status changed from Open to Closed

Thanks. r66428

Oops, forgot to edit commit message before committing :x