From: Dunrong Huang <riegama...@gmail.com>
If we failed to create temporary snapshot, the error message did not match
with the error, for example:
$ TMPDIR=/tmp/bad_path qemu-system-x86_64 -enable-kvm debian.qcow2 -snapshot
qemu-system-x86_64: -enable-kvm: could not open disk image
/home/mathslinux/Images/debian.qcow2: No such file or directory
Indeed, the file which cant be created is /tmp/bad_path/vl.xxxxxx, not
debian.qcow2. so the error message makes users feel confused.
Signed-off-by: Dunrong Huang <riegama...@gmail.com>
---
v1 -> v2:
Output error message only if fd < 0
v2 -> v3:
Output error message in the caller of get_tmp_filename()
block.c | 2 ++
1 个文件被修改，插入 2 行(+)
diff --git a/block.c b/block.c
index 470bdcc..074987e 100644
--- a/block.c
+++ b/block.c
@@ -764,6 +764,8 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
int flags,
ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
if (ret < 0) {
+ fprintf(stderr, "Could not create temporary snapshot %s: %s\n",
+ tmp_filename, strerror(errno));
return ret;
}
--
1.7.12
