X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/f0884f3947f99919d82e82e787845b56917843a8..1705dd20918634cfce236049e47d0fe43753dbc8:/doc/doc-src/FAQ.src

diff --git a/doc/doc-src/FAQ.src b/doc/doc-src/FAQ.src
index b1a1ae743..03360be6a 100644
--- a/doc/doc-src/FAQ.src
+++ b/doc/doc-src/FAQ.src
@@ -1,4 +1,3 @@
-## $Cambridge: exim/doc/doc-src/FAQ.src,v 1.7 2005/05/06 08:28:16 ph10 Exp $
 ##
 ## This file is processed by Perl scripts to produce an ASCII and an HTML
 ## version. Lines starting with ## are omitted. The markup used with paragraphs
@@ -467,7 +466,7 @@ A0020: These kinds of delay are usually caused by some kind of network problem
 ==>          deny  hosts = *.x.example
 
            If at all possible, you should use IP addresses instead of host
-           names in blocking lists in order to to avoid this problem.
+           names in blocking lists in order to avoid this problem.
 
        You can use the \-bh-\ option to get more information about what is
        happening at the start of a connection. However, note that the \-bh-\
@@ -851,7 +850,9 @@ A0044: Exim has been unable to create a file in its spool area in which to
 
        If you are running Exim with an alternate configuration file using a
        command such as \"exim -C altconfig..."\, remember that the use of -C
-       takes away Exim's root privilege.
+       takes away Exim's root privilege, unless \\TRUSTED_CONFIG_LIST\\
+       is set in \(Local/Makefile)\ and the corresponding file contains a
+       prefix which matches the alternative configuration file being used.
 
        Check that you have defined the spool directory correctly by running
 
@@ -1147,25 +1148,17 @@ Q0065: When (as \/root/\) I use -C to run Exim with an alternate configuration
        trying to run an \%autoreply%\ transport. Why is this?
 
 A0065: When Exim is called with -C, it passes on -C to any instances of itself
-       that it calls (so that the whole sequence uses the same config file). If
-       it's running as \/exim/\ when it does this, all is well. However, if it
-       happens as a consequence of a non-privileged user running \%autoreply%\,
-       the called Exim gives up its root privilege. Then it can't write to the
-       spool.
-
-       This means that you can't use -C (even as \/root/\) to run an instance of
-       Exim that is going to try to run \%autoreply%\ from a process that is
-       neither \/root/\ nor \/exim/\. Because of the architecture of Exim (using
-       re-execs to regain privilege), there isn't any way round this
-       restriction. Therefore, the only way you can make this scenario work is
-       to run the \%autoreply%\ transport as \/exim/\ (that is, the user that
-       owns the Exim spool files). This may be satisfactory for autoreplies
-       that are essentially system-generated, but of course is no good for
-       autoreplies from unprivileged users, where you want the \%autoreply%\
-       transport to be run as the user. To get that to work with an alternate
-       configuration, you'll have to use two Exim binaries, with different
-       configuration file names in each. See S001 for a script that patches
-       the configuration name in an Exim binary.
+       that it calls (so that the whole sequence uses the same config file).
+       However, Exim gives up its root privilege if any user except \/root\/
+       passes a -C option to use a non-default configuration file, and that
+       includes the case where Exim re-execs itself to regain root privilege.
+       Thus it can't write to the spool.
+
+       The fix for this is to use the \\TRUSTED_CONFIG_LIST\\ build-time
+       option. This defines a file containing a list of 'trusted' prefixes for
+       configuration files. Any configuration file specified with -C, if it
+       matches a prefix listed in that file, will be used without dropping root
+       privileges (as long as it is not writeable by a non-root user).
 
 
 Q0066: What does the message \*unable to set gid=xxx or uid=xxx*\ mean?
@@ -2684,7 +2677,7 @@ A0408: Set the \qualify_preserve_domain\ option on the \%redirect%\ router.
 Q0409: I want mail for any local part at certain virtual domains to go
        to a single address for each domain.
 
-A0409: One way to to this is
+A0409: One way to do this is
 
 ==>      virtual:
            driver = redirect