Resolver Environment Variables

The settings from host.conf may be overridden using a number of environment variables. These are

RESOLV HOST CONF

This specifies a file to be read instead of /etc/host.conf.

RESOLV SERV ORDER

Overrides the order option given in host.conf. Services are given as hosts, bind, and nis, separated by a space, comma, colon, or semicolon.

RESOLV SPOOF CHECK

Determines the measures taken against spoofing. It is completely disabled by off. The values warn and warn off enable spoof checking, but turn logging on and off, respectively. A value of * turns on spoof checks, but leaves the logging facility as defined in host.conf.

RESOLV MULTI

A value of on or off may be used to override the multi options from tt host.conf.

RESOLV OVERRIDE TRIM DOMAINS

This environment specifies a list of trim domains which override those given in host.conf.

RESOLV ADD TRIM DOMAINS

This environment specifies a list of trim domains which are added to those given in host.conf.

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