internal/lockedfile: optionally force write lock

For acquiring a write lock on a directory.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 5 insertions, 1 deletions

diff --git a/internal/lockedfile/lockedfile_filelock.go b/internal/lockedfile/lockedfile_filelock.go
index 9fc16a9b..1f5ca310 100644
--- a/internal/lockedfile/lockedfile_filelock.go
+++ b/internal/lockedfile/lockedfile_filelock.go
@@ -13,7 +13,7 @@ import (
 	"hakurei.app/internal/lockedfile/internal/filelock"
 )
 
-func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
+func osOpenFile(name string, flag int, perm fs.FileMode, w bool) (*os.File, error) {
 	// On BSD systems, we could add the O_SHLOCK or O_EXLOCK flag to the OpenFile
 	// call instead of locking separately, but we have to support separate locking
 	// calls for Linux and Windows anyway, so it's simpler to use that approach
@@ -24,6 +24,10 @@ func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
 		return nil, err
 	}
 
+	if w {
+		flag |= os.O_WRONLY
+	}
+
 	switch flag & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR) {
 	case os.O_WRONLY, os.O_RDWR:
 		err = filelock.Lock(f)