Kernel/ProcFS: Provide a way to write to ProcFS inodes

ProcFSGlobalInode now calls `write_bytes()`, `truncate()` and
`set_mtime()` on its associated component. This allows us to write 0 or
1 to a ProcFSSystemBoolean component to toggle a boolean value.

1 files changed, 10 insertions, 5 deletions

diff --git a/Kernel/FileSystem/ProcFS.cpp b/Kernel/FileSystem/ProcFS.cpp
index e6a034e8a6..fd88f671a4 100644
--- a/Kernel/FileSystem/ProcFS.cpp
+++ b/Kernel/FileSystem/ProcFS.cpp
@@ -99,11 +99,6 @@ KResult ProcFSInode::chown(UserID, GroupID)
     return EPERM;
 }
 
-KResult ProcFSInode::truncate(u64)
-{
-    return EPERM;
-}
-
 KResultOr<NonnullRefPtr<ProcFSGlobalInode>> ProcFSGlobalInode::try_create(const ProcFS& fs, const ProcFSExposedComponent& component)
 {
     return adopt_nonnull_ref_or_enomem(new (nothrow) ProcFSGlobalInode(fs, component));
@@ -151,6 +146,16 @@ KResultOr<NonnullRefPtr<Inode>> ProcFSGlobalInode::lookup(StringView)
     VERIFY_NOT_REACHED();
 }
 
+KResult ProcFSGlobalInode::truncate(u64 size)
+{
+    return m_associated_component->truncate(size);
+}
+
+KResult ProcFSGlobalInode::set_mtime(time_t time)
+{
+    return m_associated_component->set_mtime(time);
+}
+
 InodeMetadata ProcFSGlobalInode::metadata() const
 {
     MutexLocker locker(m_inode_lock);