#!/usr/local/bin/python
#
# dupr - duplex postscript printing helper; use it just like lpr
#
# usage: dupr [lprargs] [[--] file ...]
#
# result value will be 0 if all lpr subcommands succeeded, or the 
# nonzero result of (one of) the failed command(s)
#
# dan sandler <dsandler@cs.rice.edu>

import sys, os

DUPLEX_PREAMBLE='''%! 
statusdict begin true setduplexmode end
'''

def runit(lpargs='', fd=sys.stdin):
    #if os.isatty(sys.stdout.fileno()):
    #    sys.stdout.write("running: " + cmd)
    pipe = os.popen("lpr " + lpargs, 'w')
    pipe.write(DUPLEX_PREAMBLE)
    pipe.write(fd.read())
    return pipe.close()

def main(args):
    lpargv = []
    filev = []

    while len(args) > 0:
        arg = args[0] ; args = args[1:]
        if arg[0] == '-':
            if arg == '--':
                 filev += args ; break
            lpargv.append(arg)
        else:
            filev.append(arg)

    lpargs = " ".join(['%s' % s for s in lpargv])

    if len(filev) > 0:
        results = [runit('-J "%s" ' % fn + lpargs, open(fn,'r')) 
            for fn in filev]
    else:
        results = [runit(lpargs)]

    return reduce(lambda x,y: x or y, results)

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))