feat: implement utime libc function, SYS_UTIME syscall, filesystem support (ext2 only)

kernel/src/Api/Filesystem.hpp

@@ -15,6 +15,7 @@
 #include <Memory/Paging.hpp>
 #include <Libraries/Memory.hpp>
 #include <Ipc/Ipc.hpp>
+#include <Timekeeping/Time.hpp>
 #include "Path.hpp"
 
 namespace montauk::abi {
@@ -133,6 +134,18 @@ namespace montauk::abi {
         return 0;
     }
 
+    static int Sys_Utime(const char* path, int64_t atime, int64_t mtime,
+                         bool useCurrent) {
+        char resolved[256];
+        if (!ResolveProcessPath(path, resolved, sizeof(resolved))) return -1;
+        if (useCurrent) {
+            int64_t now = Timekeeping::GetUnixTimestamp();
+            atime = now;
+            mtime = now;
+        }
+        return Fs::Vfs::VfsSetTimes(resolved, atime, mtime);
+    }
+
     static int Sys_FMkdir(const char* path) {
         char resolved[256];
         if (!ResolveProcessPath(path, resolved, sizeof(resolved))) return -1;