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Add unlink() syscall and /bin/rm.

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This patch adds most of the plumbing for working file deletion in Ext2FS.
Directory entries are removed and inode link counts updated.
We don't yet update the inode or block bitmaps, I will do that separately.
This commit is contained in:
Andreas Kling 2019-01-22 07:03:44 +01:00
parent 2f2f28f212
commit bda0c935c2
16 changed files with 142 additions and 6 deletions
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26
VirtualFileSystem/VirtualFileSystem.cpp
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@ -222,6 +222,32 @@ bool VFS::mkdir(const String& path, mode_t mode, InodeIdentifier base, int& erro
return false;
}
bool VFS::unlink(const String& path, Inode& base, int& error)
{
error = -EWHYTHO;
// FIXME: This won't work nicely across mount boundaries.
FileSystemPath p(path);
if (!p.is_valid()) {
error = -EINVAL;
return false;
}
InodeIdentifier parent_dir;
auto inode_id = resolve_path(path, base.identifier(), error, 0, &parent_dir);
if (!inode_id.is_valid()) {
error = -ENOENT;
return false;
}
auto parent_inode = get_inode(parent_dir);
// FIXME: The reverse_lookup here can definitely be avoided.
if (!parent_inode->remove_child(parent_inode->reverse_lookup(inode_id), error))
return false;
error = 0;
return true;
}
InodeIdentifier VFS::resolve_symbolic_link(InodeIdentifier base, Inode& symlink_inode, int& error)
{
auto symlink_contents = symlink_inode.read_entire();