Sys::Trace - Interface to system call tracing interfaces
use Sys::Trace; my $trace = Sys::Trace->new(exec => [qw(ls foo)]); $trace->start; # Returns a PID which you can watch $trace->wait; # Alternatively call this to wait on the PID my $result = $trace->results; # Returns a Sys::Trace::Results object use Cwd; print $result->files(getcwd . "/"); # Should show an attempt to look at "foo" # in the current directory (i.e. "ls # foo", above)
Provides a way to programmatically run or trace a program and see the system calls it makes.
This can be useful during testing as a way to ensure a particular file is actually opened, or another hard to test interaction actually occurs.
Currently supported tracing mechanisms are ktrace, strace and truss.
%args can be:
exec: Program and arguments to execute
pid: PID of program to trace
follow_forks: Follow child processes too (default is 1, set to 0 to disable)
Only one of exec or pid must be provided.
Start running the trace.
Wait for the trace to finish
Return a Sys::Trace::Results object populated with the results of the trace.
This does what I wanted, it is probably woefully incomplete in places.
This program is free software. It comes without any warranty, to the extent permitted by applicable law. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See http://sam.zoy.org/wtfpl/COPYING or Software::License::WTFPL_2 for more details.
David Leadbeater <email@example.com>, 2010