import os
import shlex
import subprocess
import sys

def ps(arg='axwww'):
    """
    python front-end to `ps`
    http://en.wikipedia.org/wiki/Ps_%28Unix%29
    returns a list of process dicts based on the `ps` header
    """
    retval = []
    process = subprocess.Popen(['ps', arg], stdout=subprocess.PIPE)
    stdout, _ = process.communicate()
    header = None
    for line in stdout.splitlines():
        line = line.strip()
        if header is None:
            # first line is the header
            header = line.split()
            continue
        split = line.split(None, len(header)-1)
        process_dict = dict(zip(header, split))
        retval.append(process_dict)
    return retval

def running_processes(name, defunct=True):
    """
    returns a list of 
    {'PID': PID of process (int)
     'command': command line of process (list)}
     with the executable named `name`.
     - defunct: whether to return defunct processes
    """
    retval = []
    for process in ps():
        command = process['COMMAND']
        command = shlex.split(command)
        if command[-1] == '<defunct>':
            command = command[:-1]
            if not command or not defunct:
                continue
        prog = command[0]
        basename = os.path.basename(prog)
        if basename == name:
            retval.append((int(process['PID']), command))
    return retval

if __name__ == '__main__':
    for arg in sys.argv[1:]:
        processes = running_processes(arg)
        for pid, command in processes:
            print '%s %s : %s' % (pid, arg, command)