jointr.md

Motivation

This is utility to make it easier to read strace -f output. If you do something like

strace --decode-fds -fvs8192 -oFoo multi-process-program

and there is significant clone/fork spawning then you are likely to see a great many system calls which are reported twice - once at initiation, are then suspended and then again at resumption.

The problem with this is that there can be a lot of other intervening text between these two points and the parameters of the initial call are not repeated by strace upon resumption.

So, what jointr does is act as a filter to either stitch the two halves together or at least repeat the call parameters at the continuation to help make sense of things.

Never resumed calls are just printed in hash order at the bottom.

Usage

Usage:
  jointr [optional-params] strace log path (or none for stdin)

  -c=, --cont=  string " <unfinished ...>" line suffix saying it continues
  -b=, --boc=   string "<... "             beg of contin. indication to eat
  -e=, --eoc=   string " resumed>"         end of contin. indication to eat
  -a, --all     bool   false               retain "unfinished ..." in-place