qga: add channel path to error messages

It's useful to know which device was used if/when it fails.

channel-win32.c had this since 2015, with
c69403fcd4a0cb89f838a212ab71e4a1a3464c95 ("qemu-ga: debug printouts to
help troubleshoot installation"), this brings channel-posix.c up to
speed.

Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>

diff --git a/qga/channel-posix.c b/qga/channel-posix.c
index 568350ded4d768ef0964ef3de2fdcbb773f81763..0c5175d95719ac9843f5caa2a1eaa95c7ef7e1cf 100644 (file)
--- a/qga/channel-posix.c
+++ b/qga/channel-posix.c
@@ -138,7 +138,7 @@ static gboolean ga_channel_open(GAChannel *c, const gchar *path,
             0
         );
         if (fd == -1) {
-            error_setg_errno(errp, errno, "error opening channel");
+            error_setg_errno(errp, errno, "error opening channel '%s'", path);
             return false;
         }
 #ifdef CONFIG_SOLARIS
@@ -182,7 +182,7 @@ static gboolean ga_channel_open(GAChannel *c, const gchar *path,
         assert(fd < 0);
         fd = qga_open_cloexec(path, O_RDWR | O_NOCTTY | O_NONBLOCK, 0);
         if (fd == -1) {
-            error_setg_errno(errp, errno, "error opening channel");
+            error_setg_errno(errp, errno, "error opening channel '%s'", path);
             return false;
         }
         tcgetattr(fd, &tio);