It works. I tested on RHEL8
Before this fix:
```
# /root/qemu/build/tools/virtiofsd/virtiofsd --socket-path=/tmp/sock -o
source=/home/test -d
[(null)] [ID: 00133152] virtio_session_mount: Waiting for vhost-user
socket connection...
```
After applying this patch
```
# /root/qemu/build/tools/virtiofsd/virtiofsd --socket-path=/tmp/sock -o
source=/home/test -d
[2022-08-19 01:45:41.981608+0000] [ID: 00134587] virtio_session_mount:
Waiting for vhost-user socket connection...
```
On 8/19/22 01:46, Yusuke Okada wrote:
> The "%f" specifier in g_date_time_format() is only available in glib
> 2.65.2 or later. If combined with older glib, the function returns null
> and the timestamp displayed as "(null)".
>
> For backward compatibility, g_date_time_get_microsecond should be used
> to retrieve subsecond.
>
> In this patch the g_date_time_format() leaves subsecond field as "%06d"
> and let next snprintf to format with g_date_time_get_microsecond.
>
> Signed-off-by: Yusuke Okada <okada.yus...@jp.fujitsu.com>
> ---
> tools/virtiofsd/passthrough_ll.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/tools/virtiofsd/passthrough_ll.c
> b/tools/virtiofsd/passthrough_ll.c
> index 371a7bead6..20f0f41f99 100644
> --- a/tools/virtiofsd/passthrough_ll.c
> +++ b/tools/virtiofsd/passthrough_ll.c
> @@ -4185,6 +4185,7 @@ static void setup_nofile_rlimit(unsigned long
> rlimit_nofile)
> static void log_func(enum fuse_log_level level, const char *fmt, va_list ap)
> {
> g_autofree char *localfmt = NULL;
> + char buf[64];
>
> if (current_log_level < level) {
> return;
> @@ -4197,9 +4198,11 @@ static void log_func(enum fuse_log_level level, const
> char *fmt, va_list ap)
> fmt);
> } else {
> g_autoptr(GDateTime) now = g_date_time_new_now_utc();
> - g_autofree char *nowstr = g_date_time_format(now, "%Y-%m-%d
> %H:%M:%S.%f%z");
> + g_autofree char *nowstr = g_date_time_format(now,
> + "%Y-%m-%d %H:%M:%S.%%06d%z");
> + snprintf(buf, 64, nowstr, g_date_time_get_microsecond(now));
> localfmt = g_strdup_printf("[%s] [ID: %08ld] %s",
> - nowstr, syscall(__NR_gettid), fmt);
> + buf, syscall(__NR_gettid), fmt);
> }
> fmt = localfmt;
> }
--
Thanks,
Yiding
