TTY a better version of tty

[VanRietschote]

---
This version of tty allows an optional argument being the login whose
tty you need to know. without arguments it works like the standard tty 
without arguments.
For more info see tty(1) or next news item with manual page.

Feel free to use or abuse this program at your own risk.

-- cut here ---
/* tty improved version will take login name as argument -*-update-version-*-
** HFVR VERSION=Thu Dec 12 14:34:46 1985
*/

#include <sys/types.h>
#include <utmp.h>
#include <stdio.h>
#include <string.h>

main(argc,argv)
int	argc;
char	*argv[];
{ struct utmp *record;
  extern struct utmp *getutent();
  extern char *getlogin();
  int user;
  char *name;

/* checkoptions */
  if ( argc >= 2 ) {
   if ( argv[1][0] == '-' ) {
    switch (argv[1][1]) {
     case 'V': fprintf(stderr,"%s: version 0.99\n",argv[0]);
               exit(1);
	       break;
     default : fprintf(stderr,"Usage: %s [login]\n",argv[0]);
               exit(1);
               break;
    }/*switch*/
   }/*fi*/
  }/*fi*/

  if ( argc == 2 ) {
   name = argv[1];
  } else {
   name = getlogin();
  }
  while ( (record = getutent()) != NULL ) {
    if ( strncmp(record->ut_user,name,8) == 0 ) {
     printf("/dev/%s\n",record->ut_line);
     exit(0);
    }/*fi*/
  }/*while*/
  exit(1);
}/*main*/