HP-UX Reference (11i v2 07/12) - 1M System Administration Commands N-Z (vol 4)

s
service.switch(1M) service.switch(1M)
NAME
service.switch - indicate lookup sources and fallback mechanism
SYNOPSIS
/etc/mail/service.switch
DESCRIPTION
/etc/mail/service.switch
is a sendmail(1M) service switch similar to
/etc/nsswitch.conf
(see switch(4)) that indicates the lookup source for host names and aliases. It consists of two lines, one for
hosts and one for aliases. The lookup sources are listed after the
hosts or aliases name.
For
hosts, one or more of the following can be listed:
files (for /etc/hosts )
dns (for Domain Name Service)
nis (for NIS)
nisplus (for NIS+)
For aliases, one or more of the following can be listed:
files (for /etc/mail/aliases
)
nis (for NIS)
nisplus (for NIS+)
Sample Configurations
1. The default configuration for service.switch
is to use dns for host name lookups and the
aliases file for aliases. (Note that due to a bug, the host name lookup will never fall back to a
file lookup, so anything listed after dns will be ignored.)
hosts dns files
aliases files
2. To work with a non-DNS environment that uses file lookups (/etc/hosts
), the following
service.switch can be used:
hosts files
aliases files
3. To work with a NIS environment that does not use DNS, the following service.switch can be used:
hosts nis files
aliases nis files
4. To work with a NISPLUS environment that does not use DNS, the following service.switch
can
be used:
hosts nisplus files
aliases nisplus files
Modifying sendmail.cf
The sendmail.cf file must be modified to request the usage of the service.switch
file. Otherwise,
the default for
sendmail.cf is to use DNS for host name lookups, and files for alias lookups. To use
NIS, NISPLUS, or files, the following line must be uncommented in sendmail.cf :
#O ServiceSwitchFile=/etc/mail/service.switch
History
The service.switch file appeared in sendmail V8.
SEE ALSO
sendmail(1M).
320 Hewlett-Packard Company − 1 − HP-UX 11i Version 2: December 2007 Update