Kernel: Add link() syscall to create hard links.

This accidentally grew into a little bit of VFS cleanup as well.

Also add a simple /bin/ln implementation to exercise it.

1 files changed, 2 insertions, 0 deletions

diff --git a/Kernel/VirtualFileSystem.h b/Kernel/VirtualFileSystem.h
index f5b57c98a0..ca822ce5fa 100644
--- a/Kernel/VirtualFileSystem.h
+++ b/Kernel/VirtualFileSystem.h
@@ -66,6 +66,7 @@ public:
     RetainPtr<FileDescriptor> open(const String& path, int& error, int options, mode_t mode, Inode& base);
     RetainPtr<FileDescriptor> create(const String& path, int& error, int options, mode_t mode, Inode& base);
     bool mkdir(const String& path, mode_t mode, Inode& base, int& error);
+    bool link(const String& old_path, const String& new_path, Inode& base, int& error);
     bool unlink(const String& path, Inode& base, int& error);
     bool rmdir(const String& path, Inode& base, int& error);
     bool chmod(const String& path, mode_t, Inode& base, int& error);
@@ -96,6 +97,7 @@ private:
 
     void traverse_directory_inode(Inode&, Function<bool(const FS::DirectoryEntry&)>);
     InodeIdentifier resolve_path(const String& path, InodeIdentifier base, int& error, int options = 0, InodeIdentifier* parent_id = nullptr);
+    RetainPtr<Inode> resolve_path_to_inode(const String& path, Inode& base, int& error, RetainPtr<Inode>* parent_id = nullptr);
     InodeIdentifier resolve_symbolic_link(InodeIdentifier base, Inode& symlink_inode, int& error);
 
     Mount* find_mount_for_host(InodeIdentifier);