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author | naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2011-11-23 11:24:49 +0000 |
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committer | naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2011-11-23 11:24:49 +0000 |
commit | fd8d9d9dceb445099aacbe75eb08246925c98527 (patch) | |
tree | 537f5285cb769812bfabe8683ef93ac49d725c14 /test | |
parent | d47a1f8aaca58788baaabd84fb3cda66ed8f57b7 (diff) | |
download | ruby-fd8d9d9dceb445099aacbe75eb08246925c98527.tar.gz |
* io.c (ioctl_narg_len): don't use _IOC_SIZE macro on Linux.
On Linux some constants for ioctl(2) doesn't include the size of
its return value and 16bit value; for example FIONREAD 0x541B.
Moreover the manual, ioctl_list(2), says "Note that the size
bits are very unreliable: in lots of cases they are wrong,
either because of buggy macros using sizeof(sizeof(struct)),
or because of legacy values."
So we shouldn't use it.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33819 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
-rw-r--r-- | test/ruby/test_io.rb | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb index f1fc3233b6..d877f5e832 100644 --- a/test/ruby/test_io.rb +++ b/test/ruby/test_io.rb @@ -2112,5 +2112,14 @@ End f1.ioctl(0x80045200, entropy_count) } end + + buf = '' + assert_nothing_raised do + fionread = 0x541B + File.open(__FILE__){|f1| + f1.ioctl(fionread, buf) + } + end + assert_equal(File.size(__FILE__), buf.unpack('i!')[0]) end end |