[Ltrace-devel] suppressing process creation output

[Joe Damato]

On Fri, Mar 18, 2011 at 5:23 AM, Adam Dingle <adam at yorba.org> wrote:
> ltrace is an extremely useful tool!

Glad you like it.

> I find that when I'm tracing a tree of child processes using the -f option,
> the following type of output (which is printed unconditionally) becomes
> distracting:
> [pid 6494] --- Called exec() ---
> [pid 6496] --- Called exec() ---
> [pid 6496] +++ exited (status 0) +++
> [pid 6495] --- SIGCHLD (Child exited) ---
> [pid 6495] +++ exited (status 0) +++
> [pid 6494] --- SIGCHLD (Child exited) ---
> [pid 6494] --- Called exec() ---
> [pid 6499] --- Called exec() ---
> [pid 6500] +++ exited (status 0) +++
> [pid 6499] +++ exited (status 0) +++
> ...
> I'd like to propose that this ouput appear only when DEBUG_PROCESS is
> enabled.  Does this seem reasonable?

There is already a patch in the official git repository that provides
a flag to prevent printing signals in ltrace output. I suppose we
could consider an additional patch that would conditionally silence
the other output.

If you submit a patch I can take a look, but I would almost certainly
reject a patch that moves this output to only display when
DEBUG_PROCESS is enabled.

Joe