Bug #7718: test_ioctl_linux fails on PPC and PPC64

• Status: Closed
• Priority: Normal
• Assignee: -
• Target version: 2.0.0
• ruby -v: ruby -v: ruby 2.0.0dev (2013-01-16 trunk 38848) [powerpc-linux] and ruby 1.9.3p362 (2012-12-25 revision 38607) [powerpc64-linux]

[vo.x (Vit Ondruch)]

=begin
test_ioctl_linux(TestIO) [/builddir/build/BUILD/ruby-2.0.0-r38848/test/ruby/test_io.rb:2443]:
Exception raised:
<#<Errno::EINVAL: Invalid argument - /dev/urandom>>.

The above mentioned test case fails on PPC and PPC64. The test case was introduced in 33716. It fails with Ruby 2.0 and Ruby 1.9.3 as well.
=end

[kosaki (Motohiro KOSAKI)]

• Status changed from Open to Feedback
• Assignee deleted (kosaki (Motohiro KOSAKI))

PPC is not supported platform. so, we need more detailed description why the issue was happen.

[vo.x (Vit Ondruch)]

This is the strace output if that might help:

http://paste.fedoraproject.org/2488/

[kosaki (Motohiro KOSAKI)]

ioctl(5, RNDGETENTCNT, 0x1001000bd40) = -1 EINVAL (Invalid argument)

Weird.
RNDGETENTCNT doesn't have returning EINVAL path.

[kosaki (Motohiro KOSAKI)]

Please run following program. I guess alpha, mips, sparc and ppc have different RNDGETENTCNT number against x86.

---

#include <linux/random.h>

main(){
printf("%lx\n", RNDGETENTCNT);
}

[vo.x (Vit Ondruch)]

=begin
This is the output:

./a.out

40045200

And here is my testing IRB session:

irb

irb(main):001:0> File.open('/dev/urandom'){|f1|
irb(main):002:1* entropy_count = ""
irb(main):003:1> # get entropy count
irb(main):004:1* f1.ioctl(0x80045200, entropy_count)
irb(main):005:1> }
Errno::EINVAL: Invalid argument - /dev/urandom
from (irb):4:in ioctl' from (irb):4:in block in irb_binding'
from (irb):1:in open' from (irb):1 from /usr/bin/irb:12:in '
irb(main):006:0> File.open('/dev/urandom'){|f1|
irb(main):007:1* entropy_count = ""
irb(main):008:1> f1.ioctl(0x40045200, entropy_count)
irb(main):009:1> }
=> 0
irb(main):010:0>

And similar script run with strace: http://paste.fedoraproject.org/2489/
=end

[ko1 (Koichi Sasada)]

• Category set to core
• Target version set to 2.0.0

[kosaki (Motohiro KOSAKI)]

• Status changed from Feedback to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r38941.
Vit, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• test/ruby/test_io.rb (test_ioctl_linux): skip if a platform is
  not x86 because linux ioctl request number depend on cpu arch.
  At least, alpha, mips, sparc and ppc have a different number.
  [Bug #7718] [ruby-core:51544]