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annotate docs/uucp-setup @ 221:8742d2cee364

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added a note to the long vs. int question in md5.h Solar Designer explained to me in privat conversation that the int had performed much better on some systems and that 16bit ints are very rare. Still I like using the long.
author meillo@marmaro.de
date Fri, 23 Jul 2010 10:53:04 +0200 (2010-07-23)
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1 This document includes UUCP related information
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2
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3 Note: My knowledge of UUCP setups is very poor. I hope that the
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4 provided information is correct. Improvements to this document
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5 are very welcome. --meillo
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6
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7 UUCP setups call the MTA as `rmail'. Until version 0.2.23 masqmail
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8 could be called with this name. It switched to read-message-from-stdin
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9 mode then. AFAIK this is not enough to support UUCP, at least not at
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10 the level that is presumed by UUCP software. It seems as if at least
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11 the first input line should be handled special as it includes the
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12 envelope recipient. (Correct me if I'm wrong.) I discovered that exim
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13 has rmail support like this. That's probably the reason why it was
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14 the same in masqmail.
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16 A better, through still basic approach, was introduced with 0.2.24:
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17 misc/rmail is a small shell script (taken from postfix), which calls
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18 masqmail with appropriate options. Copy the script into your path and
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19 ensure that the included sendmail variable points to the masqmail
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20 executable.
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21
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22 A more sophisticated rmail implementation seems to be available from
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23 sendmail. I don't know details about it and whether it is needed. The
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24 difference of sendmail's rmail implementation could be related to
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25 address rewriting (user@example.org <-> org!example!user). But I
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26 don't know details -- if you do, please let me know.
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29 UUCP makes use of the -f (set return path address, i.e. from whom the
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30 mail is) option of masqmail which is only permitted for user root,
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31 the trusted user (usually `mail'), and the trusted group (often group
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32 `mail'). UUCP, however, usually runs as user and group `uucp'.
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33
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34 Masqmail currently supports only one trusted group and it is planned
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35 to remain so for simplicity reasons. (If you have good arguments on
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36 the case, try to convince me of the opposite.) Therefore the solution
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37 for masqmail is to add the user `uucp' to the trusted group (often
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38 group `mail'):
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39
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40 usermod -G mail -a uucp
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41
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42 This is not the perfect solution but an acceptable trade-off.
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45 If one really needs to enable user `uucp' to set -f but can not add
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46 it to the trusted group, see the comment in is_privileged_user() in
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47 permissions.c. It shows a hack which allows to trust another group,
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48 for instance the group `uucp'.
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51 See [1] for reasons why -f is important and needed.
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53 [1] http://bugs.hylafax.org/show_bug.cgi?id=842
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56 meillo