When upgrading, ldap library is not loaded properly due to incorrect paths

[ghost]

Summary
On RHEL 7.6 we have encountered an authentication bug upon Cacti package upgrade from version 1.1.38 -> 1.2.2
On navigating to the web installer and attempting to log in with an LDAP account, the authentication page crashes (HTML 500).

To Reproduce

1. Upgrade the Cacti package from EPEL from version 1.1.38 -> 1.2.2 using yum package manager.
2. Navigate to the Web Installer in a web browser in order to complete the upgrade
3. Attempt to authenticate with an LDAP account when prompted

Expected behavior
The LDAP account is authenticated and the user is redirected to the web installer

Suspected Cause
It appears that auth_login.php is invoked with working directory <CACTI_PATH>/install/ which causes path resolution in the statement include_once('./lib/ldap.php'); to fail.

cacti/auth_login.php

Line 122 in 6ea486a

include_once('./lib/ldap.php');

In particular, it looks like the path './lib/ldap.php' is resolved to '<CACTI_PATH>/install/lib/ldap.php', a nonexistent file path. Temporarily changing the include statement to read include_once(‘lib/ldap.php’); allowed us to successfully login and complete the upgrade.

Desktop:

• OS: RHEL 7.6
• Browser: Firefox
• Version: 66

Additional context

• For reference, <CACTI_PATH> is /usr/share/cacti/ on RHEL from the EPEL RPM package.
• Current EPEL package is at https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/c/cacti-1.2.2-1.el7.noarch.rpm
• Logging in with a local account proceeds without issue

[cigamit]

Should be resolved now.

[ghost]

Okay, looks good. Thanks!