Kernel: Implement mkdir() from a single path

This is done using dirname() and basename() :)

kernel/include/fs/VFS.h

@@ -35,7 +35,8 @@ namespace VFS
 
     ssize_t read(Node* node, size_t offset, size_t length, char* buffer);
     ssize_t write(Node* node, size_t offset, size_t length, const char* buffer);
-    int mkdir(const char* path, const char* name); // FIXME: Support deducing this via a single path.
+    int mkdir(const char* path, const char* name);
+    int mkdir(const char* pathname);
 
     void mount_root(Node* root);
 

kernel/src/fs/VFS.cpp

@@ -3,6 +3,7 @@
 #include "fs/VFS.h"
 #include "errno.h"
 #include "log/Log.h"
+#include "std/libgen.h"
 #include "std/stdlib.h"
 #include "std/string.h"
 
@@ -141,6 +142,24 @@ int VFS::mkdir(const char* path, const char* name)
     return node->mkdir_func(node, name);
 }
 
+int VFS::mkdir(const char* pathname)
+{
+    char* bstr = strdup(pathname);
+    char* dstr = strdup(pathname);
+
+    char* base = basename(bstr);
+    char* dir = dirname(dstr);
+
+    kdbgln("mkdir(): creating %s in directory %s", base, dir);
+
+    int result = mkdir(dir, base);
+
+    kfree(bstr);
+    kfree(dstr);
+
+    return result;
+}
+
 void VFS::mount(Node* mountpoint, Node* mounted)
 {
     if (!mountpoint || !mounted) return;

kernel/src/main.cpp

@@ -77,7 +77,7 @@ extern "C" void _start()
 
     kinfoln("Prepared scheduler tasks");
 
-    ASSERT(VFS::mkdir("/", "dev") == 0);
+    ASSERT(VFS::mkdir("/dev") == 0);
     VFS::mount("/dev", DeviceFS::get());
 
     Init::finish_kernel_boot();