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#! /usr/bin/env python

# Tkinter interface to SYSV `ps' and `kill' commands.

from Tkinter import *

if TkVersion < 4.0:
    raise ImportError, "This version of svkill requires Tk 4.0 or later"

from string import splitfields
from string import split
import commands
import os

user = os.environ['LOGNAME']

class BarButton(Menubutton):
    def __init__(self, master=None, **cnf):
        apply(Menubutton.__init__, (self, master), cnf)
        self.pack(side=LEFT)
        self.menu = Menu(self, name='menu')
        self['menu'] = self.menu

class Kill(Frame):
    # List of (name, option, pid_column)
    view_list = [
            ('Default', ''),
            ('Every (-e)', '-e'),
            ('Non process group leaders (-d)', '-d'),
            ('Non leaders with tty (-a)', '-a'),
            ('For this user (-u %s)' % user, '-u %s' % user),
            ]
    format_list = [
            ('Default', '', 0),
            ('Long (-l)', '-l', 3),
            ('Full (-f)', '-f', 1),
            ('Full Long (-f -l)', '-l -f', 3),
            ('Session and group ID (-j)', '-j', 0),
            ('Scheduler properties (-c)', '-c', 0),
            ]
    def kill(self, selected):
        c = self.format_list[self.format.get()][2]
        pid = split(selected)[c]
        os.system('kill -9 ' + pid)
        self.do_update()
    def do_update(self):
        format = self.format_list[self.format.get()][1]
        view = self.view_list[self.view.get()][1]
        s = commands.getoutput('ps %s %s' % (view, format))
        list = splitfields(s, '\n')
        self.header.set(list[0] + '          ')
        del list[0]
        self.frame.list.delete(0, AtEnd())
        for line in list:
            self.frame.list.insert(0, line)
    def do_motion(self, e):
        e.widget.select_clear('0', 'end')
        e.widget.select_set(e.widget.nearest(e.y))
    def do_leave(self, e):
        e.widget.select_clear('0', 'end')
    def do_1(self, e):
        self.kill(e.widget.get(e.widget.nearest(e.y)))
    def __init__(self, master=None, **cnf):
        apply(Frame.__init__, (self, master), cnf)
        self.pack(expand=1, fill=BOTH)
        self.bar = Frame(self, name='bar', relief=RAISED,
                         borderwidth=2)
        self.bar.pack(fill=X)
        self.bar.file = BarButton(self.bar, text='File')
        self.bar.file.menu.add_command(
                label='Quit', command=self.quit)
        self.bar.view = BarButton(self.bar, text='View')
        self.bar.format = BarButton(self.bar, text='Format')
        self.view = IntVar(self)
        self.view.set(0)
        self.format = IntVar(self)
        self.format.set(0)
        for num in range(len(self.view_list)):
            label, option = self.view_list[num]
            self.bar.view.menu.add_radiobutton(
                    label=label,
                    command=self.do_update,
                    variable=self.view,
                    value=num)
        for num in range(len(self.format_list)):
            label, option, col = self.format_list[num]
            self.bar.format.menu.add_radiobutton(
                    label=label,
                    command=self.do_update,
                    variable=self.format,
                    value=num)
        self.bar.tk_menuBar(self.bar.file,
                            self.bar.view,
                            self.bar.format)
        self.frame = Frame(self, relief=RAISED, borderwidth=2)
        self.frame.pack(expand=1, fill=BOTH)
        self.header = StringVar(self)
        self.frame.label = Label(
                self.frame, relief=FLAT, anchor=NW, borderwidth=0,
                font='*-Courier-Bold-R-Normal-*-120-*',
                textvariable=self.header)
        self.frame.label.pack(fill=Y, anchor=W)
        self.frame.vscroll = Scrollbar(self.frame, orient=VERTICAL)
        self.frame.list = Listbox(
                self.frame,
                relief=SUNKEN,
                font='*-Courier-Medium-R-Normal-*-120-*',
                width=40, height=10,
                selectbackground='#eed5b7',
                selectborderwidth=0,
                selectmode=BROWSE,
                yscroll=self.frame.vscroll.set)
        self.frame.vscroll['command'] = self.frame.list.yview
        self.frame.vscroll.pack(side=RIGHT, fill=Y)
        self.frame.list.pack(expand=1, fill=BOTH)
        self.update = Button(self, text='Update',
                             command=self.do_update)
        self.update.pack(fill=X)
        self.frame.list.bind('<Motion>', self.do_motion)
        self.frame.list.bind('<Leave>', self.do_leave)
        self.frame.list.bind('<1>', self.do_1)
        self.do_update()

if __name__ == '__main__':
    kill = Kill(None, borderwidth=5)
    kill.winfo_toplevel().title('Tkinter Process Killer (SYSV)')
    kill.winfo_toplevel().minsize(1, 1)
    kill.mainloop()
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