The error message changes from

    open FILENAME failed

to

    Could not create 'FILENAME': REASON

where REASON is the value of strerror(errno).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/usb/bus.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 8dd2ce415e..714e33989f 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -259,10 +259,9 @@ static void usb_qdev_realize(DeviceState *qdev, Error **errp)
     }
 
     if (dev->pcap_filename) {
-        int fd = qemu_open_old(dev->pcap_filename,
-                               O_CREAT | O_WRONLY | O_TRUNC | O_BINARY, 0666);
+        int fd = qemu_create(dev->pcap_filename,
+                             O_WRONLY | O_TRUNC | O_BINARY, 0666, errp);
         if (fd < 0) {
-            error_setg(errp, "open %s failed", dev->pcap_filename);
             usb_qdev_unrealize(qdev);
             return;
         }
-- 
2.49.0

Hi Markus,

On 21/11/25 13:14, Markus Armbruster wrote:
> The error message changes from
> 
>      open FILENAME failed
> 
> to
> 
>      Could not create 'FILENAME': REASON
> 
> where REASON is the value of strerror(errno).
> 
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>   hw/usb/bus.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/usb/bus.c b/hw/usb/bus.c
> index 8dd2ce415e..714e33989f 100644
> --- a/hw/usb/bus.c
> +++ b/hw/usb/bus.c
> @@ -259,10 +259,9 @@ static void usb_qdev_realize(DeviceState *qdev, Error **errp)
>       }
>   
>       if (dev->pcap_filename) {
> -        int fd = qemu_open_old(dev->pcap_filename,
> -                               O_CREAT | O_WRONLY | O_TRUNC | O_BINARY, 0666);
> +        int fd = qemu_create(dev->pcap_filename,
> +                             O_WRONLY | O_TRUNC | O_BINARY, 0666, errp);
>           if (fd < 0) {
> -            error_setg(errp, "open %s failed", dev->pcap_filename);
>               usb_qdev_unrealize(qdev);

OK, but why not update usb_qdev_realize() in the same patch?

>               return;
>           }

Similarly, I don't get why you updated this (and the following patch),
without also doing the similar:

  - qemu_chr_open_pipe()

  - qmp_chardev_open_file_source() and qmp_screendump()

  - s390_qmp_dump_skeys()

Anyhow, for this patch:
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>