great.

From: Robert Moskowitz rgm@htt-consult.com To: CentOS mailing list centos@centos.org Sent: Tuesday, February 21, 2017 11:40 AM Subject: Re: [CentOS] Problems with my simple write conf files method

On 02/21/2017 11:03 AM, KM wrote:

I have never used this method per se, but in general in any script if you want to preserve the $ (dollar sign) or variable name you must use a backslash to preserve it. For example change your $CONF to $CONF.  The $CONF should then be printed into your conf file.

Thanks that worked.

KM

From: Robert Moskowitz rgm@htt-consult.com   To: centos@centos.org   Sent: Tuesday, February 21, 2017 10:50 AM   Subject: [CentOS] Problems with my simple write conf files method     I have been creating conf files and similar with the following method that I picked up (I think from psotfix docs):

cat <<EOF>>/etc/aliases || exit 1 root: youremail EOF

See: http://medon.htt-consult.com/Centos7-armv7.html

But with postfixadmin I stumbled onto a problem.  The following:

cat <<EOF>/usr/share/postfixadmin/config.local.php || exit 1

<?php $CONF['database_type'] = 'mysqli'; $CONF['database_user'] = 'postfix'; $CONF['database_password'] = 'xyz'; $CONF['database_name'] = 'postfix'; $CONF['configured'] = true; ?>

EOF

produces:

cat <<EOF>/usr/share/postfixadmin/config.local.php || exit 1

<?php ['database_type'] = 'mysqli'; ['database_user'] = 'postfix'; ['database_password'] = 'xyz'; ['database_name'] = 'postfix'; ['configured'] = true; ?>

That is the '$CONF' gets processed.

What can I do to avoid this (and any other 'gotchas') or can someone provide an alternative?

thanks

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On 02/21/2017 09:27 PM, Ian Mortimer wrote:

On Tue, 2017-02-21 at 10:50 -0500, Robert Moskowitz wrote:

...

cat <<EOF>/usr/share/postfixadmin/config.local.php || exit 1

<?php $CONF['database_type'] = 'mysqli'; $CONF['database_user'] = 'postfix'; $CONF['database_password'] = 'xyz'; $CONF['database_name'] = 'postfix'; $CONF['configured'] = true; ?>

EOF

KMs method of escaping every $ in the here document works but a simpler method is to escape the EOF. That tells the shell not to do variable expansion in the document:

cat <<\EOF>/usr/share/postfixadmin/config.local.php || exit 1

Thank you. I actually had problems with changes to /etc/postfix/master.cf where I have things like ${sender} that do not work as ${sender}. So mass changes of $ to $ did not always work. :)

Do I end with 'EOF' or \EOF'?