2 files changed, 31 insertions, 0 deletions
diff --git a/Kernel/FileSystem/Custody.cpp b/Kernel/FileSystem/Custody.cpp
index af21e32687..85500ea16d 100644
--- a/Kernel/FileSystem/Custody.cpp
+++ b/Kernel/FileSystem/Custody.cpp
@@ -35,6 +35,36 @@ Custody::~Custody()
 {
 }
 
+OwnPtr<KString> Custody::try_create_absolute_path() const
+{
+    if (!parent())
+        return KString::try_create("/"sv);
+
+    Vector<Custody const*, 32> custody_chain;
+    size_t path_length = 0;
+    for (auto* custody = this; custody; custody = custody->parent()) {
+        custody_chain.append(custody);
+        path_length += custody->m_name->length() + 1;
+    }
+    VERIFY(path_length > 0);
+
+    char* buffer;
+    auto string = KString::try_create_uninitialized(path_length - 1, buffer);
+    if (!string)
+        return string;
+    size_t string_index = 0;
+    for (size_t custody_index = custody_chain.size() - 1; custody_index > 0; --custody_index) {
+        buffer[string_index] = '/';
+        ++string_index;
+        auto& custody_name = *custody_chain[custody_index - 1]->m_name;
+        __builtin_memcpy(buffer + string_index, custody_name.characters(), custody_name.length());
+        string_index += custody_name.length();
+    }
+    VERIFY(string->length() == string_index);
+    buffer[string_index] = 0;
+    return string;
+}
+
 String Custody::absolute_path() const
 {
     if (!parent())
diff --git a/Kernel/FileSystem/Custody.h b/Kernel/FileSystem/Custody.h
index 47b7815fd0..b2eaa1ee2c 100644
--- a/Kernel/FileSystem/Custody.h
+++ b/Kernel/FileSystem/Custody.h
@@ -30,6 +30,7 @@ public:
     Inode& inode() { return *m_inode; }
     const Inode& inode() const { return *m_inode; }
     StringView name() const { return m_name->view(); }
+    OwnPtr<KString> try_create_absolute_path() const;
     String absolute_path() const;
 
     int mount_flags() const { return m_mount_flags; }