[PATCH v2] cmdline: increase input buffer size

[Morten Brørup]

+CC: Bruce, Stephen

> From: Gregory Etelson [mailto:getelson at nvidia.com]
> Sent: Wednesday, 1 May 2024 19.18
> 
> DPDK defines cmdline input buffer size to 512 characters.
> That buffer size can be too small for long application input.
> For example, the following flow template API testpmd command is 444
> bytes long:
> ```
> flow queue 0 create 0 template_table 1000 \
>   pattern_template 0 actions_template 0 postpone no \
>   pattern eth / ipv4 / udp / end \
>   actions modify_field op set dst_type tag dst_level 0 dst_offset 0 \
>     src_type value src_value 0x31 width 32 /  \
>     modify_field op set dst_type ipv4_src src_type value \
>     src_value 10101010 width 32 / modify_field op add dst_type \
>     ipv4_ttl dst_level 0 dst_offset 0 src_type value \
>     src_value ff width 8 / count / jump group 100 / end
> ```
> 
> The patch increases cmdline input buffer size to the LINE_MAX value.

+ ... , which typically is 2048.

> 
> Signed-off-by: Gregory Etelson <getelson at nvidia.com>
> ---

With or without suggested patch description change,
Reviewed-by: Morten Brørup <mb at smartsharesystems.com>