Use dbus to parse system problems

problems.py

# Fergus In London - https://fergus.london <fergus@fergus.london>
#
# Uses the org.freedesktop.problems dbus channel to read out reported problems.
#
# Requires pydbus from pip.
# Requires python-gobject and glib installed on your distro.
#
import sys
import argparse
from pydbus import SystemBus
from datetime import datetime
from gi.repository import GLib


#
# Display a problem in the following format:
#  "[TIME - USERNAME - PID] EXECUTABLE_LOCATION"
#
def parse_problem(problem_data):
    time = problem_data.get("time", ("","", False))[2]
    executable = problem_data.get("executable", ("","", False))[2]
    pid = problem_data.get("global_pid", ("", "", "Unavailable"))[2]
    user = problem_data.get("username", ("", "", "Unavailable"))[2]

    time_string = "Unavailable" if not time else datetime.fromtimestamp(
        int(time)
    ).strftime('%Y-%m-%d %H:%M:%S')

    if executable:
        print("[%s - %s - %s]\t %s" % (time_string, user, pid, executable))


#
# GLib listener - pass object to parse_problem()
#
def problem_listener(pr):
    print("Recieved new error.")
    parse_problem(pr)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Problem Browser")
    parser.add_argument('-d', '--display', action="store_true", help="display all logged problems")
    parser.add_argument('-l', '--listen', action="store_true", help="listen for new problems")
    args = parser.parse_args()

    bus = SystemBus()
    problems = bus.get('.problems')

    # Iterate over all available problems and output them to the user.
    if args.display or len(sys.argv) <= 1:
        print("Previously logged errors:")
        for problem in problems.GetAllProblems():
            parse_problem( problems.GetProblemData(problem) )

    # Configure GLib event loop, and listen for dbus errors
    if args.listen:
        print("Listening for new errors:")
        problems.onJobNew = problem_listener
        GLib.MainLoop().run()