Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!cmcl2!adm!xadmx!drears@ardec.arpa
From: drears@ardec.arpa (Dennis G. Rears (FSAC))
Newsgroups: comp.unix.wizards
Subject: script & lock
Message-ID: <17972@adm.BRL.MIL>
Date: 27 Dec 88 15:06:59 GMT
Sender: news@adm.BRL.MIL
Lines: 61


  This happens on a VAX 8600 running ULTRIK but does not happen on
Goulds or Pyramids.   I have a lock program I wrote several years
ago.  When I run it on top of /usr/ucb/script I get a Bus Error when I
type in my password.  Any idea why?  Here is the program lock:

#include <stdio.h>
#include <pwd.h>
#include <signal.h>

/*     lock.c  Author 1LT Dennis Rears  724-2474 <drears@ardc>   
    
     This program locks  the terminal until that person's password
     is typed in.  This is in place of the system lock program. This
     must be compiled using the berekly universe.
                                                                           */

main()

{

	struct passwd *pwd, *getpwent();
	char	*strcpy();
	char	*getpass(), *getlogin(), *uname,  *oldpass, *pass, *crypt();
	int	endpwent(), tries = 0, wrong;

	(void)signal(SIGINT, SIG_IGN);
	(void)signal(SIGQUIT, SIG_IGN);
	(void)signal(SIGTSTP, SIG_IGN);

	/*  This gets the password entry from the file      */

	uname = getlogin();  /* What happens if the UTMP file is screwed? */
	while ((pwd = getpwent()) != NULL && strcmp (pwd->pw_name, uname) != 0)
		;
	(void)endpwent();

	/*   This checks the response                       */

	wrong = 1;
	while (wrong) {
		(void)printf("Enter Password");
		(void)fflush(stdout);
		oldpass = getpass("");
		pass = crypt(oldpass, pwd->pw_passwd);
		if (strcmp(pass, pwd->pw_passwd) == 0)
			wrong = 0;
		tries++;
	}

	if (tries > 1)
		(void)printf("There were %d tries at unlocking your terminal\n", tries);
}

Dennis
--------------------------------------------------------------------------
		Dennis G. Rears
ARPA:	drears@ardec-ac4.arpa	UUCP:  	...!uunet!ardec-ac4.arpa!drears
AT&T:	201-724-6639		USPS:	Box 210, Wharton, NJ 07885
Work:	SMCAR-FSS-E, Bldg 94, Picatinny Ars, NJ 07806
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