From: Alan Somers <asomers@gmail.com>
Date: Fri, 1 Jan 2021 19:34:58 +0000 (-0700)
Subject: Fix FUSE_COPY_FILE_RANGE in the passthrough example (#575)
X-Git-Tag: fuse-3.10.2~7
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ccba27fbec00d253102395cbdab048f0553c1938;p=qemu-gpiodev%2Flibfuse.git

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 85cca5e..08273ff 100644
--- 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;
 }