diff --git a/include/tlibc/filesystem.h b/include/tlibc/filesystem.h
index 5c0a00c..14de757 100644
--- a/include/tlibc/filesystem.h
+++ b/include/tlibc/filesystem.h
@@ -130,6 +130,10 @@ static inline Result(void) file_readBytesArrayExactly(FILE* f, Array(u8) dst){
     return file_readStructsExactly(f, dst.data, 1, dst.size);
 }
 
+/// @brief allocates array of size equal `file_getSize()` and reads whole file
+/// @param out_buf output array allocated on heap
+Result(void) file_readWhole(FILE* f, Array(u8)* out_buf);
+
 //////////////////////////////////////////////////////////////////////////////
 //                                DIRECTORY                                 //
 //////////////////////////////////////////////////////////////////////////////
diff --git a/src/filesystem/file.c b/src/filesystem/file.c
index 4b52597..75b70f4 100644
--- a/src/filesystem/file.c
+++ b/src/filesystem/file.c
@@ -124,3 +124,17 @@ Result(void) file_readStructsExactly(FILE* f, void* dst, u64 struct_size, u64 ex
     }
     return RESULT_VOID;
 }
+
+Result(void) file_readWhole(FILE* f, Array(u8)* out_buf){
+    Deferral(1);
+    bool success = false;
+    
+    try(i64 f_size, i, file_getSize(f));
+    Array(u8) buf = Array_alloc(u8, f_size);
+    Defer(if(!success) free(buf.data));
+    try_void(file_readBytesArray(f, buf));
+
+    *out_buf = buf;
+    success = true;
+    Return RESULT_VOID;
+}