killport

#!/usr/bin/env python3
from subprocess import check_output, CalledProcessError
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("port", help="Port Number")
parser.add_argument("-n", "--dry-run", action="store_false", help="run without killing processes")
args = parser.parse_args()

# lsof
# -t show process only
# -i match prtocol and port
# -s protocol state
# -P -n just show port number
# lsof -t -iTCP:3449 -sTCP:LISTEN
try:
    pids = check_output(["lsof", "-t", "-i:" + args.port, "-sTCP:LISTEN"])
except CalledProcessError as error:
    print("No process found using port: " + args.port)
    exit()

pids = pids.decode('utf-8').strip().split('\n')

def pidinfo(pid):
    return check_output(["lsappinfo", "info " + pid])

def pidname(pid):
    return check_output(["ps", "-c", '-p {}'.format(pid), '-o comm=']).decode('utf-8').strip()

def pidpath(pid):
    return check_output(["ps", '-p {}'.format(pid), '-o comm=']).decode('utf-8').strip()

for pid in pids:
    if not args.dry_run:
        print('Would Kill: {} {} "{}"'.format(pidname(pid), pid, pidpath(pid)))
        continue

    error = check_output(["kill", pid])

    if error:
        print(error)
        continue

    print('Killed: {} {} "{}"'.format(pidname(pid), pid, pidpath(pid)))