Fix FUSE_COPY_FILE_RANGE in the passthrough example (#575)

Only close the file descriptors if they were just opened.  Otherwise,
the second FUSE_COPY_FILE_RANGE operation on any given file will fail
with EBADF.

diff --git a/example/passthrough.c b/example/passthrough.c
index 85cca5e7fbc8484230f643d548ccea75afd87c59..08273ff683f9b8a3fc2b8c7f5569ccf4bee280f9 100644 (file)
--- a/example/passthrough.c
+++ b/example/passthrough.c
@@ -477,8 +477,10 @@ static ssize_t xmp_copy_file_range(const char *path_in,
        if (res == -1)
                res = -errno;
 
-       close(fd_in);
-       close(fd_out);
+       if (fi_out == NULL)
+               close(fd_out);
+       if (fi_in == NULL)
+               close(fd_in);
 
        return res;
 }