[exim-cvs] Docs: more indexing for localhost_number

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Autor: Exim Git Commits Mailing List
Data:  
Para: exim-cvs
Asunto: [exim-cvs] Docs: more indexing for localhost_number
Gitweb: https://git.exim.org/exim.git/commitdiff/311d71b8f18d544c79cc3a4cb1dafc206aaa1554
Commit:     311d71b8f18d544c79cc3a4cb1dafc206aaa1554
Parent:     c4eb4f03931be9d798ab085981b2cee6c058d109
Author:     Jeremy Harris <jgh146exb@???>
AuthorDate: Mon Dec 18 14:37:30 2023 +0000
Committer:  Jeremy Harris <jgh146exb@???>
CommitDate: Fri Dec 22 19:34:49 2023 +0000


    Docs: more indexing for localhost_number
---
 doc/doc-docbook/spec.xfpt | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)


diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index cc801a3a5..7ac7f5bda 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -16640,15 +16640,21 @@ See also the ACL modifier &`control = suppress_local_fixups`&. Section
.option localhost_number main string&!! unset
.cindex "host" "locally unique number for"
.cindex "message ids" "with multiple hosts"
+.cindex multiple "systems sharing a spool"
+.cindex "multiple hosts" "sharing a spool"
+.cindex "shared spool directory"
+.cindex "spool directory" sharing
.vindex "&$localhost_number$&"
Exim's message ids are normally unique only within the local host. If
-uniqueness among a set of hosts is required, each host must set a different
+uniqueness among a set of hosts is required
+(eg. because they share a spool directory),
+each host must set a different
value for the &%localhost_number%& option. The string is expanded immediately
after reading the configuration file (so that a number can be computed from the
host name, for example) and the result of the expansion must be a number in the
range 0&--16 (or 0&--10 on operating systems with case-insensitive file
systems). This is available in subsequent string expansions via the variable
-&$localhost_number$&. When &%localhost_number is set%&, the final two
+&$localhost_number$&. When &%localhost_number%& is set, the final four
characters of the message id, instead of just being a fractional part of the
time, are computed from the time and the local host number as described in
section &<<SECTmessiden>>&.

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