Perl Scripts Usage

Enable CGI and use Perl script.

[1] Install Perl.

[[email protected] ~]# dnf install perl perl-CGI -y

[2] By default, CGI is allowed under the [/var/www/cgi-bin] directory. It's possible to use Perl Scripts to put under the directory. All files under it is processed as CGI, though.

[[email protected] ~]# grep -n "^ *ScriptAlias" /etc/httpd/conf/httpd.conf
250:    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

[3] If you'd like to allow CGI in other directories, configure like follows. For example, allow in [/var/www/html/cgi-enabled].

[[email protected] ~]# vi /etc/httpd/conf.d/cgi-enabled.conf

# create new
# processes .cgi and .pl as CGI scripts

<Directory "/var/www/html/cgi-enabled">
    Options +ExecCGI
    AddHandler cgi-script .cgi .pl
</Directory>

[[email protected] ~]# mkdir -p /var/www/html/cgi-enabled
[[email protected] ~]# systemctl restart httpd

[4] If SELinux is enabled and also enable CGI except default location like above, add rules like follows.

[[email protected] ~]# dnf install checkpolicy policycoreutils-python-utils -y
[[email protected] ~]# semanage fcontext -a -t httpd_sys_script_exec_t /var/www/html/cgi-enabled
[[email protected] ~]# restorecon /var/www/html/cgi-enabled

[5] Create a CGI test page and access to it from client PC with web browser. It's OK if following page is shown.

[[email protected] ~]# vi /var/www/html/cgi-enabled/index.cgi

#!/usr/bin/perl

print "Content-type: text/html\n\n";
print "CGI Test Page\n";

[[email protected] ~]# chmod 705 /var/www/html/cgi-enabled/index.cgi