Only in mingetty-1.01: mingetty
diff -u mingetty-1.01-orig/mingetty.8 mingetty-1.01/mingetty.8
--- mingetty-1.01-orig/mingetty.8	2004-05-07 12:48:12.000000000 -0300
+++ mingetty-1.01/mingetty.8	2004-05-07 12:53:36.000000000 -0300
@@ -3,7 +3,7 @@
 mingetty \- minimal getty for consoles
 .SH SYNOPSIS
 .B mingetty
-[\-\-noclear] [\-\-long\-hostname]
+[\-\-noclear] [\-\-long\-hostname] [\-\-autologin username]
 .I tty
 .PP
 .SH DESCRIPTION
@@ -26,6 +26,42 @@
 .B \-\-long\-hostname
 By default the hostname is only printed until the first dot.
 With this option enabled, the full text from gethostname() is shown.
+.TP
+.B \-\-autologin username
+Log the specified user onto the console (normally
+.IR  /dev/tty1 )
+when the system is first booted without prompting for a username or
+password.
+.IP
+When the autologin option is supplied,
+.B mingetty 
+will check that the controlling terminal is the console (normally
+.IR /dev/tty1 ), 
+that a reasonable username has been supplied, and that this is the
+first autologin request since the system has booted.  If all of these
+conditions have been met, a request for an unauthenticated login is
+passed to the
+.B login 
+program.  Otherwise, a normal interactive login is performed.
+.IP
+The
+.B login 
+program may deny the request for an unauthenticated login.  Typically
+this will happen when the user is root, has a UID of 0, or whenever a
+normal interactive login would be denied due to the access
+restrictions specified in the
+.IR nologin , 
+.IR usertty , 
+or
+.I securetty 
+files.
+.IP
+Only a single autologin request will be issued after a system boot.
+If the automated login request is denied, or if the user logs out, 
+.B mingetty
+will revert to performing normal interactive logins for all subsequent
+login requests.
+.TP
 .PP
 .SH "ISSUE ESCAPES"
 .B mingetty 
@@ -64,7 +100,8 @@
 .PP
 .SH FILES
 .IR /etc/issue ,
-.IR /var/run/utmp .
+.IR /var/run/utmp ,
+.IR /var/log/autologin .
 .PP
 .SH "SEE ALSO"
 .BR mgetty (8),
Only in mingetty-1.01: mingetty.8~
diff -u mingetty-1.01-orig/mingetty.c mingetty-1.01/mingetty.c
--- mingetty-1.01-orig/mingetty.c	2004-05-07 12:48:12.000000000 -0300
+++ mingetty-1.01/mingetty.c	2004-05-07 13:27:03.000000000 -0300
@@ -10,7 +10,7 @@
  *  should be very reliable. For a modem getty, I'd also use nothing else
  *  but mgetty.
  *
- *  Usage: mingetty [--noclear] [--nohangup] tty
+ *  Usage: mingetty [--noclear] [--nohangup] [--autologin username] tty
  *  Example entry in /etc/inittab: 1:123:respawn:/sbin/mingetty tty1
  *
  *  This program is free software; you can redistribute it and/or
@@ -42,6 +42,19 @@
 #endif
 
 #if defined(linux) || defined(__linux__)
+/* Autologin stuff.  Currently Linux-specific, since there's no
+   standard way of getting the system boot time.  The kernel.h and the
+   sysinfo prototype are used to get the system uptime under Linux. */
+#include <linux/kernel.h>
+int sysinfo(struct sysinfo *info);
+
+/* AUTO_LAST points to a timestamp file used to limit autologins to
+   one per system boot. */
+#define AUTO_LAST "/var/log/autologin"
+
+/* AUTO_TTY is the tty on which autologins will be accepted.  If set
+   to an empty string, autologins will be accepted on any tty. */
+#define AUTO_TTY "tty1"
 #include <sys/param.h>
 #define USE_SYSLOG
 #endif
@@ -71,6 +84,8 @@
 static time_t cur_time;
 /* do not send a reset string to the terminal ? */
 static int noclear = 0;
+/* If supplied, attempt an automatic login with this username. */
+static char *autologin_name = NULL;
 /* Print the whole string of gethostname() instead of just until the next "." */
 static int longhostname = 0;
 /* do not call vhangup() on the tty */
@@ -377,6 +392,64 @@
 	return logname;
 }
 
+/*
+ * autologin_ok -- returns 1 if it's okay to auto-login when:
+ *   this login is from /dev/tty1; and
+ *   there was a login name passed with the --autologin option; and
+ *   the autologin_name contains only "nice" characters; and
+ *   this is the first autologin attempt since the last boot; 
+ * return 0 otherwise.
+ */
+static int autologin_ok(void)
+{
+	char c, *cp;
+	int stat_err, fd;
+	struct sysinfo info;
+	struct stat sbuf;
+
+	/* Autologins are restricted to AUTO_TTY if non-empty. */
+	if (AUTO_TTY[0] && strcmp(tty, AUTO_TTY))
+		return 0;
+
+	/* An all-alphanumeric autologin name must be supplied. */
+	if (autologin_name == NULL || autologin_name[0] == '\0')
+		return 0;
+	for (cp = autologin_name; (c = *cp); cp++)
+		if (!isalnum(c) && c != '_')
+			return 0;
+
+	/* Get the uptime in info.uptime, and the last autologin time
+           in sbuf.st_mtime. */
+	sysinfo(&info);
+	stat_err = stat(AUTO_LAST, &sbuf);
+
+	/* If a stat error other than "no such file" occurs, I don't
+           know what went wrong, so I'll proceed with caution by
+           denying the autologin request. */
+	if (stat_err && errno != ENOENT)
+		return 0;
+
+	/* If there's been an autologin granted since the last boot,
+           deny this and any subsequent attempts.  Note that this test
+           is skipped if the AUTO_LAST file doesn't exist. */
+	if (!stat_err && time(NULL) - info.uptime < sbuf.st_mtime)
+		return 0;
+
+	/* Create the AUTO_LAST file.  The mtime of this file provides
+           a persistent record of the last time that an autologin
+           request was granted.  Deny the autologin request if either
+           the file open or file close fails. */
+	if ((fd=open(AUTO_LAST, O_WRONLY | O_CREAT | O_TRUNC, 0644)) < 0)
+		return 0;
+	if (close(fd) != 0)
+		return 0;
+
+	/* All tests are okay, so grant the autologin request. */
+	return 1;
+}
+
+
+
 static void usage (void)
 {
 	error ("usage: '%s tty' with e.g. tty=tty1", progname);
@@ -385,6 +458,7 @@
 static struct option const long_options[] = {
 	{ "noclear", no_argument, &noclear, 1},
 	{ "long-hostname", no_argument, &longhostname, 1},
+	{ "autologin", required_argument, NULL, 'a'},
 	{ "nohangup", no_argument, &nohangup, 1},
 	{ 0, 0, 0, 0 }
 };
@@ -414,6 +488,9 @@
 		switch (c) {
 			case 0:
 				break;
+                       case 'a':
+                               autologin_name = optarg;
+                               break;
 			default:
 				usage ();
 		}
@@ -434,9 +511,13 @@
 	/* flush input and output queues, important for modems */
 	ioctl (0, TCFLSH, 2);
 
-	while ((logname = get_logname ()) == 0);
-
-	execl (_PATH_LOGIN, _PATH_LOGIN, "--", logname, NULL);
+ 	if (autologin_ok()) 
+ 		execl (_PATH_LOGIN, _PATH_LOGIN, "-f", autologin_name, NULL);
+ 	else 
+		while ((logname = get_logname ()) == 0);
+			execl (_PATH_LOGIN, _PATH_LOGIN, "--", logname, NULL);
+	
+	
 	error ("%s: can't exec " _PATH_LOGIN ": %s", tty, strerror(errno));
 	exit (0);
 }
Only in mingetty-1.01: mingetty.c~
Only in mingetty-1.01: mingetty.o