The
pam_acct_mgmt function verifies and enforces account restrictions after the user has been authenticated.
The
flags argument is the binary or of zero or more of the following values:
PAM_SILENT
Do not emit any messages.
PAM_DISALLOW_NULL_AUTHTOK
Fail if the user's authentication token is null.
If any other bits are set,
pam_acct_mgmt will return
PAM_SYMBOL_ERR.