#include <security/pam_ext.h>
The pam_verror function performs the same task as pam_error() with the difference that it takes a set of arguments which have been obtained using the stdarg(3) variable argument list macros.
PAM_BUF_ERR
PAM_CONV_ERR
PAM_SUCCESS
PAM_SYSTEM_ERR
pam_info(3), pam_vinfo(3), pam_prompt(3), pam_vprompt(3), pam(8)
The pam_error and pam_verror functions are Linux-PAM extensions.