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- #! /usr/local/bin/python
-
- # Watch line printer queues (only works with BSD 4.3 lpq).
- #
- # This brings up a window containing one line per printer argument.
- #
- # Each line gives a small summary of the printer's status and queue.
- # The status tries to give as much relevant information as possible,
- # and gives extra info if you have jobs in the queue.
- #
- # The line's background color gives a hint at the status: navajo white
- # for idle, green if your job is now printing, yellow/orange for
- # small/large queue, red for errors.
- #
- # To reduce the duration of the unresponsive time while it is waiting
- # for an lpq subprocess to finish, it polls one printer every
- # delay/len(printers) seconds. A tiny dot indicates the last printer
- # updated. Hit the mouse button in the window to update the next one.
- #
- # To do:
- # - add an argument to override the default delay
- # - add arguments to override the default colors
- # - better heuristic for small/large queue (and more colors!)
- # - mouse clicks should update the printer clicked in
- # - better visual appearance, e.g., boxes around the lines?
-
- import posix
- import sys
- import time
- import string
-
- import stdwin
- from stdwinevents import *
- import mainloop
-
- # Default parameters
- DEF_PRINTER = 'oce' # This is CWI specific!
- DEF_DELAY = 10
-
- # Color assignments
- c_unknown = stdwin.fetchcolor('white')
- c_idle = stdwin.fetchcolor('navajo white')
- c_ontop = stdwin.fetchcolor('green')
- c_smallqueue = stdwin.fetchcolor('yellow')
- c_bigqueue = stdwin.fetchcolor('orange')
- c_error = stdwin.fetchcolor('red')
-
- def main():
- delay = DEF_DELAY
- #
- try:
- thisuser = posix.environ['LOGNAME']
- except:
- thisuser = posix.environ['USER']
- #
- printers = sys.argv[1:]
- if printers:
- # Strip '-P' from printer names just in case
- # the user specified it...
- for i in range(len(printers)):
- if printers[i][:2] == '-P':
- printers[i] = printers[i][2:]
- else:
- if posix.environ.has_key('PRINTER'):
- printers = [posix.environ['PRINTER']]
- else:
- printers = [DEF_PRINTER]
- #
- width = stdwin.textwidth('in')*20
- height = len(printers) * stdwin.lineheight() + 5
- stdwin.setdefwinsize(width, height)
- stdwin.setdefscrollbars(0, 0)
- #
- win = stdwin.open('lpwin')
- #
- win.printers = printers
- win.colors = [c_unknown] * len(printers)
- win.texts = printers[:]
- win.next = 0
- win.delay = DEF_DELAY
- win.thisuser = thisuser
- win.dispatch = lpdispatch
- #
- win.settimer(1)
- #
- mainloop.register(win)
- mainloop.mainloop()
-
- def lpdispatch(event):
- type, win, detail = event
- if type == WE_CLOSE or type == WE_CHAR and detail in ('q', 'Q'):
- mainloop.unregister(win)
- elif type == WE_DRAW:
- drawproc(win)
- elif type == WE_TIMER:
- update(win)
- win.change((0,0), (10000, 10000))
- elif type == WE_MOUSE_UP:
- win.settimer(1)
-
- def drawproc(win):
- d = win.begindrawing()
- offset = d.textwidth('.')
- h, v = 0, 0
- for i in range(len(win.printers)):
- text = win.texts[i]
- color = win.colors[i]
- d.setbgcolor(color)
- d.erase((h, v), (h+10000, v+d.lineheight()))
- if (i+1) % len(win.printers) == win.next and color <> c_unknown:
- d.text((h, v), '.')
- d.text((h+offset, v), text)
- v = v + d.lineheight()
-
- def update(win):
- i = win.next
- win.next = (i+1) % len(win.printers)
- win.texts[i], win.colors[i] = makestatus(win.printers[i], win.thisuser)
- win.settimer(int(win.delay * 10.0 / len(win.printers)))
-
- def makestatus(name, thisuser):
- pipe = posix.popen('lpq -P' + name + ' 2>&1', 'r')
- lines = []
- users = {}
- aheadbytes = 0
- aheadjobs = 0
- userseen = 0
- totalbytes = 0
- totaljobs = 0
- color = c_unknown
- while 1:
- line = pipe.readline()
- if not line: break
- fields = string.split(line)
- n = len(fields)
- if len(fields) >= 6 and fields[n-1] == 'bytes':
- rank = fields[0]
- user = fields[1]
- job = fields[2]
- files = fields[3:-2]
- bytes = eval(fields[n-2])
- if user == thisuser:
- userseen = 1
- if aheadjobs == 0:
- color = c_ontop
- elif not userseen:
- aheadbytes = aheadbytes + bytes
- aheadjobs = aheadjobs + 1
- totalbytes = totalbytes + bytes
- totaljobs = totaljobs + 1
- if color == c_unknown:
- color = c_smallqueue
- elif color == c_smallqueue:
- color = c_bigqueue
- if users.has_key(user):
- ujobs, ubytes = users[user]
- else:
- ujobs, ubytes = 0, 0
- ujobs = ujobs + 1
- ubytes = ubytes + bytes
- users[user] = ujobs, ubytes
- else:
- if fields and fields[0] <> 'Rank':
- line = string.strip(line)
- if line == 'no entries':
- line = name + ': idle'
- if color == c_unknown:
- color = c_idle
- elif line[-22:] == ' is ready and printing':
- line = line[:-22]
- else:
- line = name + ': ' + line
- color = c_error
- lines.append(line)
- #
- if totaljobs:
- line = `(totalbytes+1023)/1024` + ' K'
- if totaljobs <> len(users):
- line = line + ' (' + `totaljobs` + ' jobs)'
- if len(users) == 1:
- line = line + ' for ' + users.keys()[0]
- else:
- line = line + ' for ' + `len(users)` + ' users'
- if userseen:
- if aheadjobs == 0:
- line = line + ' (' + thisuser + ' first)'
- else:
- line = line + ' (' + `(aheadbytes+1023)/1024`
- line = line + ' K before ' + thisuser + ')'
- lines.append(line)
- #
- sts = pipe.close()
- if sts:
- lines.append('lpq exit status ' + `sts`)
- color = c_error
- return string.joinfields(lines, ': '), color
-
- main()
-