pam_sm_acct_mgmt man page
pam_sm_acct_mgmt — PAM service function for account management
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv);
The pam_sm_acct_mgmt function is the service module's implementation of the pam_acct_mgmt(3) interface.
This function performs the task of establishing whether the user is permitted to gain access at this time. It should be understood that the user has previously been validated by an authentication module. This function checks for other things. Such things might be: the time of day or the date, the terminal line, remote hostname, etc. This function may also determine things like the expiration on passwords, and respond that the user change it before continuing.
Valid flags, which may be logically OR'd with PAM_SILENT, are:
Do not emit any messages.
Return PAM_AUTH_ERR if the database of authentication tokens for this authentication mechanism has a NULL entry for the user.
User account has expired.
The user's authentication token has expired. Before calling this function again the application will arrange for a new one to be given. This will likely result in a call to pam_sm_chauthtok().
The authentication token was successfully updated.
User unknown to password service.
pam(3), pam_acct_mgmt(3), pam_sm_chauthtok(3), pam_strerror(3), PAM(8)