frazenshtein / optrace

optrace records output files written by each process and accumulates total written data size

optrace

optrace records output files written by each process and accumulates total written data size.

Usage example

-> cat sample.py

import os

print("dumping data...")
with open("out.txt", "w") as afile:
        afile.write("world\nhello")
print("sorting data...")
os.system("cat out.txt | sort > out.sort.txt")
os.abort()

-> optrace -hf python sample.py >log

Output tracer summary report (limit: 24)
   380KiB /tmp/core (pid:13830|37900288)
      32b /tmp/log (pid:13830|37900288)
      12b /tmp/out.sort.txt (pid:13833|37900016)
      11b /tmp/out.txt (pid:13830|37900288)
Proc legend:
  13833|37900016 (ppid:13831) sort
  13830|37900288 (ppid:0) python sample.py
Total output: 380KiB

Help

Usage: optrace [-fJhaCDS] [-o FILE] [-c VAL]
               [-r VAL] [-j VAL] [-s SIG] PROG [ARGS]

Output format:
  -c|--cmdline-size VAL    maximum string size for cmd lines
                           (negative for unlimited, 0 to disable, default:120)
  -r|--report-size VAL     number of files to print in report
                           (negative for unlimited, 0 to disable, default:24)
  -o|--output FILE         send report to FILE instead of stderr
  -a|--append              don't overwrite output FILE
  -h|--human-readable      print sizes in human readable format

Behavior:
  -D|--no-coredumps        don't take into account core dump files
  -e|--empty-files         trace empty files
  -s|--forward-sig SIG     append signum to the list of forwarding signals to the PROG
                           (default: [SIGINT])
  -S|--forward-all-signals append signum to the list of forwarding signals to the PROG

Tracing:
  -F|--no-follow-forks     don't follow forks
  -J|--no-jail-forks       don't kill all created processes, when optrace exits
  -W|--no-wait-daemons     don't wait for daemon processes when following forks
  -C|--no-seccomp          don't use seccomp anyway

Building

make -j