summaryrefslogtreecommitdiff
path: root/internal/fusefrontend/fs.go
diff options
context:
space:
mode:
Diffstat (limited to 'internal/fusefrontend/fs.go')
-rw-r--r--internal/fusefrontend/fs.go11
1 files changed, 11 insertions, 0 deletions
diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index e7c3903..5c52a19 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -160,6 +160,17 @@ func (fs *FS) Open(path string, flags uint32, context *fuse.Context) (fuseFile n
return NewFile(f, fs)
}
+// openBackingFile opens the ciphertext file that backs relative plaintext
+// path "relPath". Always adds O_NOFOLLOW to the flags.
+func (fs *FS) openBackingFile(relPath string, flags int) (fd int, err error) {
+ dirfd, cName, err := fs.openBackingDir(relPath)
+ if err != nil {
+ return -1, err
+ }
+ defer syscall.Close(dirfd)
+ return syscallcompat.Openat(dirfd, cName, flags|syscall.O_NOFOLLOW, 0)
+}
+
// Due to RMW, we always need read permissions on the backing file. This is a
// problem if the file permissions do not allow reading (i.e. 0200 permissions).
// This function works around that problem by chmod'ing the file, obtaining a fd,