Add an 'al' (autologin username) capability to getty/gettytab. This is a

damn useful thing for using with serial consoles in clusters etc or secure
console locations.  Using a custom gettytab entry for console with
an entry like 'al=root' means that there is *always* a root login ready on
the console.  This should replace hacks like those which go with conserver
etc.  (This is a loaded gun, watch out for those feet!)

Submitted by:  "Andrew J. Korty" <ajk@purdue.edu>

libexec/getty/gettytab.5

@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     from: @(#)gettytab.5	8.4 (Berkeley) 4/19/94
-.\"	$Id: gettytab.5,v 1.17 1998/05/04 02:37:24 steve Exp $
+.\"	$Id: gettytab.5,v 1.18 1998/06/10 12:34:25 phk Exp $
 .\" "
 .Dd April 19, 1994
 .Dt GETTYTAB 5
@@ -79,6 +79,7 @@ table.
 .Bl -column Namexx /usr/bin/login Default
 .It Sy Name	Type	Default	Description
 .It "ac	str	unused	expect-send chat script for modem answer"
+.It "al	str	unused	user to auto-login instead of prompting"
 .It "ap	bool	false	terminal uses any parity"
 .It "bk	str	0377	alternate end of line character (input break)"
 .It "c0	num	unused	tty control flags to write messages"

libexec/getty/gettytab.h

@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)gettytab.h	8.2 (Berkeley) 3/30/94
- *	$Id$
+ *	$Id: gettytab.h,v 1.8 1997/02/22 14:21:38 peter Exp $
  */
 
 /*
@@ -90,6 +90,7 @@ struct gettyflags {
 #define IF	gettystrs[26].value
 #define IC	gettystrs[27].value
 #define AC	gettystrs[28].value
+#define AL	gettystrs[29].value
 
 /*
  * Numeric definitions.

libexec/getty/init.c

@@ -36,7 +36,7 @@
 static char sccsid[] = "@(#)from: init.c	8.1 (Berkeley) 6/4/93";
 #endif
 static const char rcsid[] =
-	"$Id$";
+	"$Id: init.c,v 1.9 1997/11/21 07:43:49 charnier Exp $";
 #endif /* not lint */
 
 /*
@@ -83,6 +83,7 @@ struct	gettystrs gettystrs[] = {
 	{ "if" },			/* sysv-like 'issue' filename */
 	{ "ic" },			/* modem init-chat */
 	{ "ac" },			/* modem answer-chat */
+	{ "al" },			/* user to auto-login */
 	{ 0 }
 };
 

libexec/getty/main.c

@@ -42,7 +42,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)from: main.c	8.1 (Berkeley) 6/20/93";
 #endif
 static const char rcsid[] =
-	"$Id: main.c,v 1.23 1998/10/08 23:14:02 jkh Exp $";
+	"$Id: main.c,v 1.24 1999/03/09 22:04:44 brian Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -348,7 +348,23 @@ main(argc, argv)
 			signal(SIGALRM, dingdong);
 			alarm(TO);
 		}
-		if ((rval = getname()) == 2) {
+		if (AL) {
+			const char *p = AL;
+			char *q = name;
+			int n = sizeof name;
+
+			while (*p && q < &name[sizeof name - 1]) {
+				if (isupper(*p))
+					upper = 1;
+				else if (islower(*p))
+					lower = 1;
+				else if (isdigit(*p))
+					digit++;
+				*q++ = *p++;
+			}
+		} else
+			rval = getname();
+		if (rval == 2) {
 			oflush();
 			alarm(0);
 			limit.rlim_max = RLIM_INFINITY;
@@ -357,7 +373,7 @@ main(argc, argv)
 			execle(PP, "ppplogin", ttyn, (char *) 0, env);
 			syslog(LOG_ERR, "%s: %m", PP);
 			exit(1);
-		} else if (rval) {
+		} else if (rval || AL) {
 			register int i;
 
 			oflush();
@@ -392,7 +408,8 @@ main(argc, argv)
 			limit.rlim_max = RLIM_INFINITY;
 			limit.rlim_cur = RLIM_INFINITY;
 			(void)setrlimit(RLIMIT_CPU, &limit);
-			execle(LO, "login", "-p", name, (char *) 0, env);
+			execle(LO, "login", AL ? "-fp" : "-p", name,
+			    (char *) 0, env);
 			syslog(LOG_ERR, "%s: %m", LO);
 			exit(1);
 		}