1 | #!/usr/bin/python |
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2 | """Debathena lpq wrapper script. |
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3 | |
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4 | A script that intelligently determines whether a command was intended |
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5 | for CUPS or LPRng and sends it off in the right direction |
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6 | """ |
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7 | |
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8 | |
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9 | import os |
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10 | import socket |
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11 | import subprocess |
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12 | import sys |
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13 | |
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14 | from debathena.printing import common |
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15 | from debathena.printing import simple |
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16 | |
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17 | |
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18 | opts = ( |
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19 | (common.SYSTEM_CUPS, 'EU:h:P:al'), |
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20 | (common.SYSTEM_LPRNG, 'aAlLVcvP:st:D:'), |
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21 | ) |
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22 | |
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23 | |
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24 | queue_opt = '-P' |
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25 | |
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26 | |
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27 | def cups_version_is_below_1_4(): |
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28 | """ |
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29 | On Debian-based systems, return whether cupsys-bsd is older than 1.4. |
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30 | |
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31 | On non-Debian-based systems, return False unconditionally. |
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32 | """ |
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33 | try: |
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34 | version = subprocess.Popen( |
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35 | ["dpkg-query", "-W", "-f", "${Version}", |
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36 | "cups-bsd"], stdout=subprocess.PIPE).communicate()[0] |
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37 | compare = subprocess.call( |
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38 | ["dpkg", "--compare-versions", |
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39 | version, |
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40 | "lt-nl", "1.4"]) |
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41 | return compare == 0 |
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42 | except OSError: |
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43 | # Assume the current version of CUPS is fine |
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44 | return False |
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45 | |
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46 | |
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47 | def _main(args): |
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48 | args.pop(0) |
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49 | |
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50 | queue = common.get_default_printer() |
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51 | try: |
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52 | argstyle, options, arguments = common.parse_args(args, opts) |
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53 | |
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54 | # Find the last queue specified in the arguments |
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55 | queue_args, options = common.extract_opt(options, queue_opt) |
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56 | if queue_args: |
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57 | queue = queue_args[-1][-1] |
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58 | |
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59 | # Now that we've sliced up the arguments, put them back |
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60 | # together |
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61 | args = [o + a for o, a in options] + arguments |
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62 | except ValueError: |
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63 | # parse_args returned None, so we learned nothing. We'll just |
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64 | # go with the default queue |
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65 | pass |
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66 | |
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67 | if not queue: |
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68 | # We tried and couldn't figure it out, so not our problem |
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69 | common.error(2, ("\n" |
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70 | "No default printer configured. Specify a %s option, or configure a\n" |
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71 | "default printer via e.g. System | Administration | Printing.\n" |
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72 | "\n" % queue_opt)) |
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73 | |
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74 | system, server, queue = common.find_queue(queue) |
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75 | |
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76 | if system == common.SYSTEM_CUPS and args == []: |
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77 | # CUPS clients before 1.4 and CUPS servers at least 1.4 don't |
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78 | # communicate well about lpq stuff, so just implement RFC 1179 lpq |
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79 | # stuff, so just implement lpq ourselves since that works |
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80 | if cups_version_is_below_1_4(): |
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81 | try: |
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82 | s = socket.socket() |
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83 | s.settimeout(10) |
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84 | s.connect((server, 515)) |
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85 | s.send("\x03" + queue + "\n") |
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86 | print s.makefile().read() |
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87 | return 0 |
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88 | except (socket.error, socket.timeout): |
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89 | # Oh well. |
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90 | pass |
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91 | |
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92 | args.insert(0, '%s%s' % (queue_opt, queue)) |
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93 | if server: |
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94 | os.environ['CUPS_SERVER'] = server |
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95 | |
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96 | common.dispatch_command(system, 'lpq', args) |
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97 | |
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98 | |
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99 | def main(): |
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100 | sys.exit(_main(sys.argv)) # pragma: nocover |
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101 | |
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102 | |
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103 | if __name__ == '__main__': |
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104 | main() # pragma: nocover |
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