SELinux makes use of extended attributes that can appended to the directory structures on the disk. Think if these as meta data. Access Control Lists (ACLs) being another.
The extended attributes that you need to append to a directory are called contexts and SELinux acts like a traffic cop, making sure that an executable that has certain contexts is allowed to access the filesystem based on these contexts. You can see what's available on the directory using the
-Z switch to
$ sudo ls -Z /var/www
drwxr-xr-x. root root system_u:object_r:httpd_sys_script_exec_t:s0 cgi-bin
drwxr-xr-x. root root system_u:object_r:httpd_sys_content_t:s0 html
Here you can see that these directories have the context
httpd_sys_script_exec_t:s0 on the
cgi-bin dir. and the
html dir. has
You can add these using the
$ sudo chcon -t httpd_sys_content_t public_html
The command you're asking about will simply load the module
mypoll.pp I do not believe it will grant any permissions to anything, there is likely more messages in the
audit.log that you're missing with your command, that will tell you in more detail what you need to do to allow access.
I'd encourage you to take some time and familiarize yourself with SELinux. It's confusing at first but is generally straightforward, after spending a little time with it. See the resources below to get you started.