Inserting arbitrary messages into strace output

Justin Dearing zippy1981 at gmail.com
Fri Dec 19 03:35:59 UTC 2014


Ok, so writing to an invalid descriptor makes sense. However, the line will
still be decorated with the fact that its a write call. I'd like just the
message written.

Or is the negative -1 file descriptor unique and not just a variation on
this? http://ewontfix.com/10/

On Thu, Dec 18, 2014 at 10:22 PM, enh <enh at google.com> wrote:
>
> already implemented...
>
>   write(-1, "GOT HERE", strlen("GOT HERE"));
>
>
> On Thu, Dec 18, 2014 at 7:17 PM, Justin Dearing <zippy1981 at gmail.com>
> wrote:
> > Hello,
> >
> > Inspired by a feature of the windows utility process monitor, Id like a
> > simple elegant way to insert arbitrary streams of text into strace
> output.
> > Basically, I want to insert "GOT HERE" messaged into strace output. The
> > procmon feature is described here
> > (https://github.com/Wintellect/ProcMonDebugOutput)
> >
> > Specifically what I propose is as follows
> >
> > strace by default will open the  named pipe /tmp/straceProfiling.X for
> > reading, creating it if it does not exist. X will be the pid of the child
> > process. any data written to that named pipe, gets immediaty flushed to
> the
> > strace output preceded with MSG: There will be a switch to name the
> socket,
> > a switch to disable it, and a switch to change the message prefix.
> >
> > Does this sound like a useful feature request?
> >
> > Regards,
> >
> > Justin Dearing
> >
> >
> >
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>
>
>
> --
> Elliott Hughes - http://who/enh - http://jessies.org/~enh/
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>
>
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