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Kernel: Virtualize the File::stat() operation

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Instead of FileDescriptor branching on the type of File it's wrapping,
add a File::stat() function that can be overridden to provide custom
behavior for the stat syscalls.
This commit is contained in:
Andreas Kling 2020-09-06 18:31:51 +02:00
parent 5444cabd39
commit 22831033d0
6 changed files with 28 additions and 20 deletions
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19
Kernel/FileSystem/FileDescription.cpp
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@ -77,20 +77,11 @@ FileDescription::~FileDescription()
KResult FileDescription::stat(::stat& buffer)
{
if (is_fifo()) {
memset(&buffer, 0, sizeof(buffer));
buffer.st_mode = S_IFIFO;
return KSuccess;
}
if (is_socket()) {
memset(&buffer, 0, sizeof(buffer));
buffer.st_mode = S_IFSOCK;
return KSuccess;
}
if (!m_inode)
return KResult(-EBADF);
return metadata().stat(buffer);
LOCKER(m_lock);
// FIXME: This is a little awkward, why can't we always forward to File::stat()?
if (m_inode)
return metadata().stat(buffer);
return m_file->stat(buffer);
}
off_t FileDescription::seek(off_t offset, int whence)