mirror of https://github.com/python/cpython.git
112 lines
2.4 KiB
Python
Executable File
112 lines
2.4 KiB
Python
Executable File
#! /ufs/guido/bin/sgi/python
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#! /usr/local/python
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# Watch line printer queue(s).
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# Intended for BSD 4.3 lpq.
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import posix
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import sys
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import time
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import string
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DEF_PRINTER = 'psc'
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DEF_DELAY = 10
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def main():
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delay = DEF_DELAY # XXX Use getopt() later
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try:
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thisuser = posix.environ['LOGNAME']
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except:
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thisuser = posix.environ['USER']
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printers = sys.argv[1:]
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if not printers:
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if posix.environ.has_key('PRINTER'):
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printers = [posix.environ['PRINTER']]
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else:
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printers = [DEF_PRINTER]
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#
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clearhome = posix.popen('clear', 'r').read()
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#
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while 1:
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# Pipe output through cat for extra buffering,
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# so the output (which overwrites the previous)
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# appears instantaneous.
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sys.stdout = posix.popen('exec cat', 'w')
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sys.stdout.write(clearhome)
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for name in printers:
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pipe = posix.popen('lpq -P' + name + ' 2>&1', 'r')
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showstatus(name, pipe, thisuser)
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sts = pipe.close()
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if sts:
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print name + ': *** lpq exit status', sts
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sts = sys.stdout.close()
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time.sleep(delay)
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def showstatus(name, pipe, thisuser):
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lines = 0
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users = {}
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aheadbytes = 0
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aheadjobs = 0
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userseen = 0
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totalbytes = 0
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totaljobs = 0
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while 1:
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line = pipe.readline()
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if not line: break
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fields = string.split(line)
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n = len(fields)
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if len(fields) >= 6 and fields[n-1] = 'bytes':
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rank = fields[0]
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user = fields[1]
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job = fields[2]
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files = fields[3:-2]
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bytes = eval(fields[n-2])
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if user = thisuser:
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userseen = 1
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elif not userseen:
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aheadbytes = aheadbytes + bytes
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aheadjobs = aheadjobs + 1
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totalbytes = totalbytes + bytes
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totaljobs = totaljobs + 1
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if users.has_key(user):
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ujobs, ubytes = users[user]
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else:
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ujobs, ubytes = 0, 0
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ujobs = ujobs + 1
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ubytes = ubytes + bytes
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users[user] = ujobs, ubytes
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else:
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if fields and fields[0] <> 'Rank':
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if line[-1:] = '\n':
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line = line[:-1]
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if not lines:
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print name + ':',
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else:
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print
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print line,
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lines = lines + 1
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if totaljobs:
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if lines > 1:
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print
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lines = lines+1
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print (totalbytes+1023)/1024, 'K',
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if totaljobs <> len(users):
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print '(' + `totaljobs` + ' jobs)',
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if len(users) = 1:
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print 'for', users.keys()[0],
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else:
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print 'for', len(users), 'users',
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if userseen:
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if aheadjobs = 0:
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print '(' + thisuser + ' first)',
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else:
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print '(' + `(aheadbytes+1023)/1024`,
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print 'K before', thisuser + ')'
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if lines:
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print
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try:
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main()
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except KeyboardInterrupt:
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pass
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