annotate MoinMoin/server/__init__.py @ 0:77665d8e2254

tag of nonpublic@localhost--archive/moin--enterprise--1.5--base-0 (automatically generated log message) imported from: moin--main--1.5--base-0
author Thomas Waldmann <tw-public@gmx.de>
date Thu, 22 Sep 2005 15:09:50 +0000
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children 65dc979761f0
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1 # -*- coding: iso-8859-1 -*-
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2 """
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3 MoinMoin server package
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4
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5 Supply common server utilities.
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6
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7 @copyright: 2004 by Nir Soffer
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8 @license: GNU GPL, see COPYING for details.
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9 """
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10
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11 # Imports
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12 import os
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13
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14
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15 def switchUID(uid, gid):
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16 """ Switch identity to safe user and group
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17
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18 Does not support Windows, because the necessary calls are not available.
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19 TODO: can we use win32api calls to achieve the same effect on Windows?
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20
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21 Raise RuntimeError if can't switch or trying to switch to root.
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22 """
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23 if uid == 0 or gid == 0:
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24 # We will not run as root. If you like to run a web
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25 # server as root, then hack this code.
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26 raise RuntimeError('will not run as root!')
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27
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28 try:
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29 os.setgid(gid)
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30 os.setuid(uid)
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31 except (OSError, AttributeError):
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32 # Either we can't switch, or we are on windows, which does not have
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33 # those calls.
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34 raise RuntimeError("can't change uid/gid to %s/%s" %
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35 (uid, gid))
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36 import sys
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37 sys.stderr.write("Running as uid/gid %d/%d\n" % (uid, gid))
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38
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39
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40 class Config:
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41 """ Base class for server configuration
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42
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43 When you create a server, you should run it with a Config
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44 instance. Sub class to define the default values.
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45
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46 This class does all error checking needed for config values, and will
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47 raise a RuntimeError on any fatal error.
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48 """
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49
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50 def __init__(self):
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51 """ Validate and post process configuration values
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52
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53 Will raise RuntimeError for any wrong config value.
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54 """
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55
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56 # Check that docs path is accessible
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57 self.docs = os.path.normpath(os.path.abspath(self.docs))
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58 if not os.access(self.docs, os.F_OK | os.R_OK | os.X_OK):
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59 raise RuntimeError("Can't access docs directory '%s'. Check docs "
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60 "setting and permissions." % self.docs)
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61
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62 # Don't check uid and gid on windows, those calls are not available.
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63 if os.name == 'nt':
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64 self.uid = self.gid = 0
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65 return
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66
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67 # If serving privileged port, we must run as root to bind the port.
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68 # we will give up root privileges later
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69 if self.port < 1024 and os.getuid() != 0:
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70 raise RuntimeError('Must run as root to serve port number under 1024. '
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71 'Run as root or change port setting.')
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72
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73 # If we run as root to serve privileged port, we change user and group
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74 # to a safe setting. Get the uid and gid now, switch later.
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75 self.uid = os.getuid()
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76 self.gid = os.getgid()
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77 if self.uid == 0:
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78 import pwd, grp
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79 try:
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80 self.uid = pwd.getpwnam(self.user)[2]
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81 except KeyError:
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82 raise RuntimeError("Unknown user: '%s', check user setting" %
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83 self.user)
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84 try:
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85 self.gid = grp.getgrnam(self.group)[2]
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86 except KeyError:
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87 raise RuntimeError("Unknown group: '%s', check group setting" %
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88 self.group)
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89