Re: [PATCH] examples/vm_power: fix format-truncation warning

[Kevin Traynor <ktraynor@redhat.com>]

On 25/02/2026 18:32, Stephen Hemminger wrote:
> On Wed, 25 Feb 2026 17:36:32 +0000
> Kevin Traynor <ktraynor@redhat.com> wrote:
> 
>> Without libbsd-devel strlcpy is defined as rte_strlcpy and a warning is
>> raised for format-truncation. Observed with gcc 15.2.1.
>>
>> In function ‘rte_strlcpy’,
>>     inlined from ‘add_host_channels’ at
>> ../examples/vm_power_manager/channel_manager.c:600:3:
>> ../lib/eal/include/rte_string_fns.h:63:24:
>> warning: ‘%s’ directive output may be truncated writing up to
>> 4095 bytes into a region of size 108 [-Wformat-truncation=]
>> 63 |         return (size_t)snprintf(dst, size, "%s", src);
>>    |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> Check for truncation of socket_path[4096] into channel_path[108] to
>> remove warning.
>>
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Kevin Traynor <ktraynor@redhat.com>
> 
> Since socket_path is a unix domain socket path.
> It should be UNIX_PATH_MAX (108) not PATH_MAX (4096)
> 

Yeah, I had adjusted all the socket_path/names in the file to
UNIX_PATH_MAX as an initial fix but it spewed a different truncation
warning as one of them gets a copy from dirent->d_name which is 256.

So considering it's just an optimization of example code and hasn't
really been developed over the last few years, I just fixed the warning
that showed up.