Attachment 895977 Details for Bug 1098151 – patch to check if the kernel supports SEEK_DATA/SEEK_HOLE

patch to check if the kernel supports SEEK_DATA/SEEK_HOLE

ruby-2.1.1-lseek.patch (text/x-m4), 3.15 KB, created by Karsten Hopp on 2014-05-15 15:20:22 UTC

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Creator: Karsten Hopp

Created: 2014-05-15 15:20:22 UTC

Size: 3.15 KB

patch

obsolete

>diff -up ruby-2.1.1/test/ruby/test_io.rb.seek ruby-2.1.1/test/ruby/test_io.rb
>--- ruby-2.1.1/test/ruby/test_io.rb.seek	2014-05-15 16:45:49.000000000 +0200
>+++ ruby-2.1.1/test/ruby/test_io.rb	2014-05-15 16:45:53.000000000 +0200
>@@ -1666,6 +1666,27 @@ class TestIO < Test::Unit::TestCase
>     }
>   end
> 
>+  def can_seek_data(f)
>+    if /linux/ =~ RUBY_PLATFORM
>+      # include/uapi/linux/magic.h
>+      case f.statfs.type
>+      when 0x9123683E # BTRFS_SUPER_MAGIC
>+      when 0x7461636f # OCFS2_SUPER_MAGIC
>+      when 0xEF53 # EXT4_SUPER_MAGIC
>+        return false if (`/bin/uname -r`.split('.').map(&:to_i) <=> [3,8]) < 0
>+        # ext3's timestamp resolution is seconds
>+        s = f.stat
>+        s.mtime.nsec != 0 || s.atime.nsec != 0 || s.ctime.nsec != 0
>+      when 0x58465342 # XFS_SUPER_MAGIC
>+        return false if (`/bin/uname -r`.split('.').map(&:to_i) <=> [3,5]) < 0
>+      when 0x01021994 # TMPFS_MAGIC
>+        return false if (`/bin/uname -r`.split('.').map(&:to_i) <=> [3,8]) < 0
>+      else
>+        return false
>+      end
>+    end
>+    true
>+  end
> 
>   def test_seek
>     make_tempfile {|t|
>@@ -1692,16 +1713,30 @@ class TestIO < Test::Unit::TestCase
> 
>       if defined?(IO::SEEK_DATA)
>         open(t.path) { |f|
>+          break unless can_seek_data(f)
>           assert_equal("foo\n", f.gets)
>-          f.seek(0, IO::SEEK_DATA)
>+          assert_nothing_raised(proc {"cannot SEEK_DATA on FS(0x%X)" % f.statfs.type}) do
>+            f.seek(0, IO::SEEK_DATA)
>+          end
>           assert_equal("foo\nbar\nbaz\n", f.read)
>         }
>+        open(t.path, 'r+') { |f|
>+          break unless can_seek_data(f)
>+          f.seek(100*1024, IO::SEEK_SET)
>+          f.print("zot\n")
>+          f.seek(50*1024, IO::SEEK_DATA)
>+          assert_operator(f.pos, :>=, 50*1024)
>+          assert_match(/\A\0*zot\n\z/, f.read)
>+        }
>       end
> 
>       if defined?(IO::SEEK_HOLE)
>         open(t.path) { |f|2
>+          break unless can_seek_data(f)
>           assert_equal("foo\n", f.gets)
>           f.seek(0, IO::SEEK_HOLE)
>+          assert_operator(f.pos, :>, 20)
>+          f.seek(100*1024, IO::SEEK_HOLE)
>           assert_equal("", f.read)
>         }
>       end
>@@ -1728,16 +1763,30 @@ class TestIO < Test::Unit::TestCase
> 
>       if defined?(IO::SEEK_DATA)
>         open(t.path) { |f|
>+          break unless can_seek_data(f)
>           assert_equal("foo\n", f.gets)
>-          f.seek(0, :DATA)
>+          assert_nothing_raised(proc {"cannot SEEK_DATA on FS(0x%X)" % f.statfs.type}) do
>+            f.seek(0, :DATA)
>+          end
>           assert_equal("foo\nbar\nbaz\n", f.read)
>         }
>+        open(t.path, 'r+') { |f|
>+          break unless can_seek_data(f)
>+          f.seek(100*1024, :SET)
>+          f.print("zot\n")
>+          f.seek(50*1024, :DATA)
>+          assert_operator(f.pos, :>=, 50*1024)
>+          assert_match(/\A\0*zot\n\z/, f.read)
>+        }
>       end
> 
>       if defined?(IO::SEEK_HOLE)
>         open(t.path) { |f|
>+          break unless can_seek_data(f)
>           assert_equal("foo\n", f.gets)
>           f.seek(0, :HOLE)
>+          assert_operator(f.pos, :>, 20)
>+          f.seek(100*1024, :HOLE)
>           assert_equal("", f.read)
>         }
>       end

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Attachments on bug 1098151: 895873 | 895977 | 896528