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

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

Also add a simple /bin/ln implementation to exercise it.
This commit is contained in:
Andreas Kling 2019-02-21 13:26:40 +01:00
parent b6115ee5b7
commit 7d288aafb2
13 changed files with 138 additions and 93 deletions
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2
Kernel/VirtualFileSystem.h
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@ -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);