[1015] | 1 | #! /usr/bin/env python |
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| 2 | |
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| 3 | # PyKota Print Quota Warning sender |
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| 4 | # |
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| 5 | # PyKota - Print Quotas for CUPS and LPRng |
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| 6 | # |
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[1257] | 7 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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[1015] | 8 | # This program is free software; you can redistribute it and/or modify |
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| 9 | # it under the terms of the GNU General Public License as published by |
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| 10 | # the Free Software Foundation; either version 2 of the License, or |
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| 11 | # (at your option) any later version. |
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| 12 | # |
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| 13 | # This program is distributed in the hope that it will be useful, |
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | # GNU General Public License for more details. |
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| 17 | # |
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| 18 | # You should have received a copy of the GNU General Public License |
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| 19 | # along with this program; if not, write to the Free Software |
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| 20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 21 | # |
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| 22 | # $Id$ |
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| 23 | # |
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| 24 | # THIS IS AN UPGRADE SCRIPT FOR OLD PYKOTA DATABASES TO THE 1.03 VERSION |
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| 25 | # |
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| 26 | |
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| 27 | import sys |
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| 28 | import os |
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| 29 | try : |
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| 30 | import pg |
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| 31 | except ImportError : |
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| 32 | sys.stderr.write("The PyGreSQL Python module doesn't seem to be available. ABORTED.\n") |
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| 33 | sys.exit(-1) |
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| 34 | |
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| 35 | def dump_old_database() : |
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| 36 | """Dumps the existing PyKota database to a file, to avoir loosing data. |
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| 37 | |
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| 38 | Returns 1 if dump is successfull, 0 if it isn't. |
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| 39 | """ |
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| 40 | pipeinput = os.popen("pg_dump -C -D -N -U postgres -f pykota-dump.sql pykota") |
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| 41 | dummy = pipeinput.read() |
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| 42 | return (pipeinput.close() is None) or 0 |
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| 43 | |
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| 44 | def create_new_database() : |
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| 45 | """Creates the empty database.""" |
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| 46 | pipeinput = os.popen("psql -U postgres template1 <pykota-postgresql.sql") |
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| 47 | dummy = pipeinput.read() |
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| 48 | return (pipeinput.close() is None) or 0 |
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| 49 | |
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| 50 | def restore_original_database() : |
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| 51 | """Creates the empty database.""" |
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| 52 | pipeinput = os.popen("psql -U postgres template1 <pykota-dump.sql") |
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| 53 | dummy = pipeinput.read() |
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| 54 | return (pipeinput.close() is None) or 0 |
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| 55 | |
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| 56 | def open_database(dbname="pykota") : |
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| 57 | """Returns the database object or None if we can't connect to it.""" |
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| 58 | try : |
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| 59 | pykotadb = pg.connect(host="localhost", port=5432, dbname=dbname, user="postgres") |
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| 60 | except pg.error, msg : |
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| 61 | sys.stderr.write("%s\n" % msg) |
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| 62 | sys.stderr.write("Unable to connect to the local PostgreSQL server.\nPlease modify the open_database() method in %s\nto connect to the correct PostgreSQL server\nand relaunch the script.\n" % sys.argv[0]) |
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| 63 | return |
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| 64 | else : |
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| 65 | return pykotadb |
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| 66 | |
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| 67 | |
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| 68 | def doQuote(field) : |
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| 69 | """Quotes a field for use as a string in SQL queries.""" |
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| 70 | if type(field) == type(0) : # TODO : do something safer |
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| 71 | typ = "decimal" |
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| 72 | else : |
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| 73 | typ = "text" |
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| 74 | return pg._quote(field, typ) |
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| 75 | |
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| 76 | def main() : |
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| 77 | """Does the work.""" |
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| 78 | |
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| 79 | # First we make a dump of the old database |
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| 80 | print "Dumping old database for safety...", |
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| 81 | if not dump_old_database() : |
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| 82 | sys.stderr.write("Error while dumping old database. ABORTED.\n") |
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| 83 | return -1 |
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| 84 | print "Done." |
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| 85 | |
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| 86 | # Second we try to connect to it |
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| 87 | print "Extracting datas from old database...", |
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| 88 | db = open_database() |
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| 89 | if db is None : |
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| 90 | sys.stderr.write("Impossible to connect to old PyKota database. ABORTED.\nAre you sure you are upgrading an existing installation ?\n") |
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| 91 | return -1 |
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| 92 | |
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| 93 | # Third we extract datas |
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| 94 | oldprinters = db.query("SELECT * FROM printers ORDER BY id;") |
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| 95 | oldusers = db.query("SELECT * FROM users ORDER BY id;") |
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| 96 | oldquotas = db.query("SELECT * FROM userpquota ORDER BY printerid, userid;") |
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| 97 | |
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| 98 | # Fourth close the database |
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| 99 | db.close() |
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| 100 | print "Done." |
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| 101 | |
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| 102 | # Fifth we delete the old database ! |
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| 103 | answer = raw_input("The old database will be deleted for the upgrade to take place.\nAre you sure you want to continue (y/N) ? ") |
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| 104 | if answer[0:1].upper() != 'Y' : |
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| 105 | sys.stderr.write("User wants to stop now ! ABORTED.\n") |
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| 106 | return -1 |
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| 107 | db = open_database("template1") |
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| 108 | if db is None : |
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| 109 | sys.stderr.write("Impossible to connect to database template1. ABORTED.\nPlease report to your Database administrator.\n") |
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| 110 | return -1 |
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| 111 | try : |
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| 112 | db.query("DROP DATABASE pykota;") |
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| 113 | except pg.error, msg : |
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| 114 | sys.stderr.write("Impossible to delete old database. ABORTED.\n%s\n" % msg) |
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| 115 | db.close() |
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| 116 | return -1 |
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| 117 | else : |
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| 118 | db.close() |
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| 119 | |
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| 120 | # Sixth we create the new database |
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| 121 | print "Creating the new database...", |
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| 122 | if not create_new_database() : |
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| 123 | sys.stderr.write("impossible to create new database ! ABORTED.\n") |
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| 124 | return -1 |
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| 125 | print "Done." |
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| 126 | |
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| 127 | # Seventh we restore old data |
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| 128 | print "Restoring old datas..." |
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| 129 | db = open_database() |
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| 130 | if db is None : |
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| 131 | sys.stderr.write("Impossible to connect to new PyKota database. ABORTED.\nOld database will be restored if possible.") |
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| 132 | print "An error occured, I'll try to restore the original database..." |
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| 133 | if not restore_original_database() : |
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| 134 | sys.stderr.write("Shit ! A double-error occured !!!\nPlease report problem to your database administrator.\n") |
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| 135 | sys.stderr.write("And file a bug report to alet@librelogiciel.com\n") |
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| 136 | else : |
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| 137 | print "Done." |
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| 138 | return -1 |
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| 139 | db.query("BEGIN;") |
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| 140 | try : |
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| 141 | newprinters = {} |
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| 142 | for oldprinter in oldprinters.dictresult() : |
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| 143 | db.query("INSERT INTO printers (printername) VALUES (%s);" % doQuote(oldprinter["printername"])) |
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| 144 | newid = db.query("SELECT id FROM printers WHERE printername='%s';" % oldprinter["printername"]).dictresult()[0]["id"] |
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| 145 | newprinters[oldprinter["id"]] = newid |
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| 146 | newusers = {} |
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| 147 | for olduser in oldusers.dictresult() : |
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| 148 | db.query("INSERT INTO users (username) VALUES (%s);" % doQuote(olduser["username"])) |
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| 149 | newid = db.query("SELECT id FROM users WHERE username='%s';" % olduser["username"]).dictresult()[0]["id"] |
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| 150 | newusers[olduser["id"]] = newid |
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| 151 | for oldquota in oldquotas.dictresult() : |
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| 152 | db.query("INSERT INTO userpquota (userid, printerid, pagecounter, lifepagecounter, softlimit, hardlimit, datelimit) VALUES (%s, %s, %s, %s, %s, %s, %s);" % |
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| 153 | (doQuote(newusers[oldquota["userid"]]) , doQuote(newprinters[oldquota["printerid"]]), doQuote(oldquota["pagecounter"]), doQuote(oldquota["lifepagecounter"]), doQuote(oldquota["softlimit"]), doQuote(oldquota["hardlimit"]), doQuote(oldquota["datelimit"]))) |
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| 154 | except pg.error, msg : |
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| 155 | sys.stderr.write("ERROR : %s\nABORTED.\n" % msg) |
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| 156 | db.query("ROLLBACK;") |
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| 157 | db.close() |
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| 158 | return -1 |
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| 159 | except : |
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| 160 | sys.stderr.write("Unknown error ! ABORTED.\n") |
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| 161 | db.query("ROLLBACK;") |
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| 162 | db.close() |
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| 163 | return -1 |
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| 164 | else : |
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| 165 | db.query("COMMIT;") |
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| 166 | db.close() |
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| 167 | print "Done." |
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| 168 | print "NB : Last job on each printer was lost. This is normal !" |
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| 169 | return 0 |
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| 170 | |
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| 171 | if __name__ == "__main__" : |
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| 172 | sys.exit(main()) |
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