qmail-ifenvexec

Section: User Commands (1)
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NAME

qmail-ifenvexec - execute a program named by an environment variable

SYNOPSIS

Invoked from tcpserver:

tcpserver ... qmail-ifenvexec VARIABLE prog

DESCRIPTION

qmail-ifenvexec checks if the enviroment variable VARIABLE is set. If it is, it takes the value as the name of a program to execute. Any other arguments on the command line to qmail-ifenvexec are passed as arguments to the new program.

If the variable is not set, prog is executed.

EXAMPLES

If a tcprules CDB has the entry:

192.168.1.0:allow,RECORDIO="/usr/local/bin/recordio"

and a service is started with the following command:

tcpserver -x rules.cdb 0 25 qmail-ifenvexec RECORDIO qmail-smtpd

then connections from 192.168.1.0 will have the SMTP conversation recorded in the logs, while connections from other IP addresses will not.