pam_open_session (3) - Linux Man Pages
pam_open_session: start PAM session management
pam_open_session - start PAM session management
*pamh, int flags);
It should be noted that the effective uid, geteuid(2). of the application should be of sufficient privilege to perform such tasks as creating or mounting the user's home directory for example.
The flags argument is the binary or of zero or more of the following values:
- Do not emit any messages.
- General failure.
- Memory buffer error.
- Session failure.
- Session was successful created.