Display error messages to the user
#include <security/pam_ext.h>
int pam_error(pam_handle_t *pamh, const char *fmt, ...); int pam_verror(pam_handle_t *pamh, const char *fmt, va_list args);
The pam_error function prints error messages through the conversation function to the user.
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
Memory buffer error.
PAM_CONV_ERR
Conversation failure.
PAM_SUCCESS
Error message was displayed.
PAM_SYSTEM_ERR
System error.
pam_info(3), pam_vinfo(3), pam_prompt(3), pam_vprompt(3), pam(7)
The pam_error and pam_verror functions are Linux-PAM extensions.