syscalls: make execve and vfs_read_file_by_path use follow_path, fix vfs_read_file_by_path name, fix execve-related pagefault

src/fs/vfs.c

@@ -191,18 +191,14 @@ void test_iso9660()
     }
 }
 
-int vsf_read_file_by_path(const char* path, uint8_t** buffer, l9660_dir* dir)
+int vfs_read_file_by_path(const char* path, uint8_t** buffer)
 {
     l9660_file* file = (l9660_file*)malloc(sizeof(l9660_file));
+    l9660_dir* dir = (l9660_dir*)malloc(sizeof(l9660_dir));
 
     l9660_status err;
 
-    err = l9660_openat(file, dir, path);
-    if (err != L9660_OK)
-    {
-        debug_log("read_file: err: 0x%X\n", err);
-        return err;
-    }
+    follow_path(path, file, dir);
 
     debug_log("HEHE %s\n", path);
 
@@ -218,6 +214,7 @@ int vsf_read_file_by_path(const char* path, uint8_t** buffer, l9660_dir* dir)
 
     read = vfs_read_file(file, *buffer);
     free(file);
+    free(dir);
     debug_log("bytes read: 0x%X\n", read);
     
     return 0;