On Tue, 30 Oct 2018 10:34:45 -0600 David Ahern <dsah...@gmail.com> wrote:
> On 10/30/18 9:05 AM, Stefano Brivio wrote: > > Now that we have an abstraction for columns, it's relatively easy to > > selectively display only some of them, and Yoann has a use case for it. > > > > Patch 1/3 fixes a rendering issue that shows up only when display of > > arbitrary columns is disabled. Patch 2/3 implements the relevant option, > > and patch 3/3 makes the output more readable when some columns are > > disabled. > > > > > > I like the intent, and I have prototyped something similar for 'ip'. > > A more flexible approach is to use format strings to allow users to > customize the output order and whitespace as well. So for ss and your > column list (winging it here): > > netid = %N > state = %S > recv Q = %Qr > send Q = %Qs > local address = %Al > lport port = %Pl > remote address = %Ar > remote port = %Pr > process data = %p > ... > > then a format string could be: "%S %Qr %Qs %Al:%Pl %Ar:%Pr %p\n" > > or for csv output: "%S,%Qr,%Qs,%Al,%Pl,%Ar,%Pr,%p\n" > > I have not had time to look into an implementation for ip. Conceptually > - and scanning the kernel's vsprintf code - it does not look that > difficult, just time consuming on the frontend with the initial setup. The problem with custom formats is that you lose all ability for Gcc to check format strings.
