*** 3000userlogin.c	2021-02-06 13:11:42.000000000 -0500
--- 3000userlogin-pam.c	2025-02-21 21:13:59.032226383 -0500
***************
*** 6,11 ****
--- 6,18 ----
  #include <unistd.h>
  #include <stdlib.h>
  #include <pwd.h>
+ #include <security/pam_appl.h>
+ #include <security/pam_misc.h>
+ 
+ static struct pam_conv conv = {
+     misc_conv,
+     NULL
+ };
  
  int main(int argc, char *argv[])
  {
***************
*** 14,19 ****
--- 21,28 ----
          char *username;
          extern char **environ;
          struct passwd *pw_entry;
+ 	pam_handle_t *ph = NULL;
+ 	int authenticated = 0;
                  
          if (argc < 2) {
                  fprintf(stderr, "Usage: %s <username>\n", argv[0]);
***************
*** 24,30 ****
                 getuid(), geteuid(), getgid(), getegid());
  
          username = argv[1];
!         
          pw_entry = getpwnam(username);
          if (pw_entry == NULL) {
                  fprintf(stderr, "Could not find user %s.\n", username);
--- 33,59 ----
                 getuid(), geteuid(), getgid(), getegid());
  
          username = argv[1];
! 
! 	result = pam_start("", username, &conv, &ph);
! 	if (result == PAM_SUCCESS)
! 	        result = pam_authenticate(ph, 0);
! 	else {
! 		fprintf(stderr, "PAM session failed to start.\n");
! 		exit(-2);
! 	}
! 
! 	if (result != PAM_SUCCESS) 
! 		fprintf(stderr, "Authentication failed.\n");
! 	else
! 		authenticated = 1;
! 
! 	if (pam_end(ph,result) != PAM_SUCCESS) {
! 		fprintf(stderr, "PAM session failed to end.\n");
! 		exit(-2);
! 	}
! 
! 	if (!authenticated) exit(-2);
! 
          pw_entry = getpwnam(username);
          if (pw_entry == NULL) {
                  fprintf(stderr, "Could not find user %s.\n", username);