random.c: fix failures on old Linux

This follows the behavior of fill_random_bytes_urandom and fixes
the following failures I encountered on my old machine:

1) Error:
TestSecureRandom#test_s_random_bytes_without_openssl:
NotImplementedError: No random device
    $RUBYDIR/lib/securerandom.rb:66:in `gen_random'
    $RUBYDIR/lib/securerandom.rb:94:in `random_bytes'
    $RUBYDIR/test/test_securerandom.rb:12:in `test_s_random_bytes'
    $RUBYDIR/test/test_securerandom.rb:97:in `block in test_s_random_bytes_without_openssl'
    $RUBYDIR/lib/tmpdir.rb:88:in `mktmpdir'
    $RUBYDIR/test/test_securerandom.rb:85:in `test_s_random_bytes_without_openssl'

  2) Error:
TestSecureRandom#test_s_urlsafe_base64:
NotImplementedError: No random device
    $RUBYDIR/lib/securerandom.rb:66:in `gen_random'
    $RUBYDIR/lib/securerandom.rb:94:in `random_bytes'
    $RUBYDIR/lib/securerandom.rb:164:in `urlsafe_base64'
    $RUBYDIR/test/test_securerandom.rb:131:in `block in test_s_urlsafe_base64'
    $RUBYDIR/test/test_securerandom.rb:130:in `times'
    $RUBYDIR/test/test_securerandom.rb:130:in `test_s_urlsafe_base64'

  3) Error:
TestSecureRandom#test_uuid:
NotImplementedError: No random device
    $RUBYDIR/lib/securerandom.rb:66:in `gen_random'
    $RUBYDIR/lib/securerandom.rb:94:in `random_bytes'
    $RUBYDIR/lib/securerandom.rb:230:in `uuid'
    $RUBYDIR/test/test_securerandom.rb:160:in `test_uuid'

* random.c (fill_random_bytes_syscall): return -1 for error
* random.c (fill_random_bytes): try urandom on syscall failure

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51183 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions