* test/ruby/test_process.rb (test_execopts_gid): Skip a test

  that is known to fail on AIX. AIX allows setgid to
  a supplementary group, but Ruby does not allow the "-e"
  option when setgid'ed, so the test does not work as intended.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54010 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 1 deletions

diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 274492674f..8d6274adf3 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1,3 +1,4 @@
+# coding: utf-8
 # frozen_string_literal: false
 require 'test/unit'
 require 'tempfile'
@@ -1812,7 +1813,15 @@ class TestProcess < Test::Unit::TestCase
       assert_nothing_raised(feature6975) do
         begin
           g = IO.popen([RUBY, "-e", "print Process.gid", gid: group], &:read)
-          assert_equal(gid, g, feature6975)
+          # AIX allows a non-root process to setgid to its supplementary group,
+          # while other UNIXes do not. (This might be AIX's violation of the POSIX standard.)
+          # However, Ruby does not allow a setgid'ed Ruby process to use the -e option.
+          # As a result, the Ruby process invoked by "IO.popen([RUBY, "-e", ..." above fails
+          # with a message like "no -e allowed while running setgid (SecurityError)" to stderr,
+          # the exis status is set to 1, and the variable "g" is set to an empty string.
+          # To conclude, on AIX, if the "gid" variable is a supplementary group,
+          # the assert_equal next can fail, so skip it.
+          assert_equal(gid, g, feature6975) unless $?.exitstatus == 1 && /aix/ =~ RUBY_PLATFORM && gid != Process.gid
         rescue Errno::EPERM, NotImplementedError
         end
       end