Bash script to update path to ssl certificate file in ssl.conf

Question

I am creating a reusable script for automating the setup of new SSLs on server setups. I have a few different lines that need to get the file paths updated.

The defaults in the ssl.conf file look like this (One has leading # tag):

SSLCertificateFile /etc/pki/tls/certs/localhost.crt

I need it to be dynamically set in the bash script, to end up like this:

SSLCertificateFile /etc/pki/tls/certs/example.crt

So far I started out with this, but i'm not sure what I'm doing.

~/update_ssl_conf.sh

Code:

#!/bin/bash
SSL_CONFIG_PATH="/etc/httpd/conf.d/ssl.conf"

SSL_DEFAULT_CERT_PATH="SSLCertificateFile /etc/pki/tls/certs/localhost.crt"
SSL_CERT_PATH="SSLCertificateFile /etc/pki/tls/certs/example.crt"
sed "s/.*\b$SSL_DEFAULT_CERT_PATH\b.*/$SSL_CERT_PATH/" $SSL_CONFIG_PATH

***UPDATED AREA, Also need sed command to update lines that begin with #.

The defaults in the ssl.conf file look like this (Has leading # tag):

#SSLCACertificateFile /etc/pki/tls/certs/ca-bundle.crt

I need it to be dynamically set in the bash script, to end up like this:

 SSLCACertificateFile /etc/pki/tls/certs/example-ca-bundle.crt

So far I started out with this, but i'm not sure what I'm doing.

~/update_ssl_conf.sh

Code:

#!/bin/bash
SSL_CONFIG_PATH="/etc/httpd/conf.d/ssl.conf"

SSL_DEFAULT_CA_CERT_PATH="#SSLCACertificateFile /etc/pki/tls/certs/ca-bundle.crt" 
SSL_CA_CERT_PATH="SSLCACertificateFile /etc/pki/tls/certs/example-ca-bundle.crt"

I tried from the accepted solution for the

sed -i "s|.*\b#$SSL_DEFAULT_CA_CERT_PATH\b.*|$SSL_CA_CERT_PATH|" SSL_CONFIG_PATH

and

sed -i "s|(?s).*(?<!\\w)$SSL_DEFAULT_CA_CERT_PATH(?!\\w).*|$SSL_CA_‌​CERT_PATH|" $SSL_CONFIG_PATH

neither are working because the regular expression is not correct.

Answer 1

The problem is with slashes. Your variable contains them and the final command will have multiple forward slashes, which affect your original sed syntax ofs/ <search>/<replace/ syntax. Just change your sed word separator from / to | (or any other character eg say @ or ~ ) to fix it.

sed -i "s|.*\b$SSL_DEFAULT_CERT_PATH\b.*|$SSL_CERT_PATH|" file

should solve your problem and use the -i flag to do in-place substitution and do -i.bak to save a backup of the file in the format <filename>.bak

The GNU sed , man page says

The / characters may be uniformly replaced by any other single character within any given s command. The / character (or whatever other character is used in its stead) can appear in the regexp or replacement only if it is preceded by a \\ character.