From e2bb7d70affdd14d4a9249749da24ff3670e5f3e Mon Sep 17 00:00:00 2001
From: imp0s5ible <imp@tuta.io>
Date: Fri, 20 Mar 2026 15:21:12 +0100
Subject: [PATCH] Make map_file_from_path use the open flags

map_file_from_path now passes the appropriate flags on to os.open
instead of always calling it with os.O_RDWR.
It will no longer try to open a file with write permissions if the user
didn't request write access to the file mapping (or vice-versa).
---
 core/mem/virtual/file.odin | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/mem/virtual/file.odin b/core/mem/virtual/file.odin
index 660210bbf..af0449e66 100644
--- a/core/mem/virtual/file.odin
+++ b/core/mem/virtual/file.odin
@@ -10,7 +10,14 @@ map_file :: proc{
 }
 
 map_file_from_path :: proc(filename: string, flags: Map_File_Flags) -> (data: []byte, error: Map_File_Error) {
-	f, err := os.open(filename, os.O_RDWR)
+	open_flags : os.File_Flags
+	if .Read in flags {
+		open_flags += {.Read}
+	}
+	if .Write in flags {
+		open_flags += {.Write}
+	}
+	f, err := os.open(filename, open_flags)
 	if err != nil {
 		return nil, .Open_Failure
 	}
@@ -37,4 +44,4 @@ unmap_file :: proc(data: []byte) {
 	if raw_data(data) != nil {
 		_unmap_file(data)
 	}
-}
\ No newline at end of file
+}