Add helper is_unknown_or_system_descriptor()

Open/close attribute support for xattrs backend

For the xattr/BSD (untyped) attribute backend implement fs_fopen_attr()
and fs_close_attr(). A new AttributeDescriptor is created. It is
currently used in write_pos() only.

Add helper is_unknown_or_system_descriptor()

Open/close attribute support for xattrs backend

For the xattr/BSD (untyped) attribute backend implement fs_fopen_attr()
and fs_close_attr(). A new AttributeDescriptor is created. It is
currently used in write_pos() only.

Under Linux it is now possible to emulate the BeOS attribute support via
xattrs. It can be enabled with the configure switch "--use-xattr". Note
that the amount of data stored in attributes may be limited by the used
file system -- e.g. AFAIK ext3 has a limit of one block (usually 4 KB)
for all attributes of a file, which might not suffice. XFS should be
fine, as should ReiserFS 3.6 (or any FS which stores attributes in
hidden files).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20609 a95241bf-73f2-0310-859d-f6bbb57e9c96

libroot_build.so:
* Reorganized sources a bit:
- The descriptor support is in a separate file now.
- Disentangled the attribute support from the other stuff.
* Removed broken xattr use for attribute support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20606 a95241bf-73f2-0310-859d-f6bbb57e9c96

Add helper is_unknown_or_system_descriptor()

Open/close attribute support for xattrs backend

For the xattr/BSD (untyped) attribute backend implement fs_fopen_attr()
and fs_close_attr(). A new AttributeDescriptor is created. It is
currently used in write_pos() only.

Add helper is_unknown_or_system_descriptor()

Open/close attribute support for xattrs backend

For the xattr/BSD (untyped) attribute backend implement fs_fopen_attr()
and fs_close_attr(). A new AttributeDescriptor is created. It is
currently used in write_pos() only.

Under Linux it is now possible to emulate the BeOS attribute support via
xattrs. It can be enabled with the configure switch "--use-xattr". Note
that the amount of data stored in attributes may be limited by the used
file system -- e.g. AFAIK ext3 has a limit of one block (usually 4 KB)
for all attributes of a file, which might not suffice. XFS should be
fine, as should ReiserFS 3.6 (or any FS which stores attributes in
hidden files).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20609 a95241bf-73f2-0310-859d-f6bbb57e9c96

libroot_build.so:
* Reorganized sources a bit:
- The descriptor support is in a separate file now.
- Disentangled the attribute support from the other stuff.
* Removed broken xattr use for attribute support.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20606 a95241bf-73f2-0310-859d-f6bbb57e9c96