diff -Nur mingetty-0.9.4/Makefile mingetty-0.9.4.pld/Makefile
--- mingetty-0.9.4/Makefile	Tue Apr  9 21:11:26 1996
+++ mingetty-0.9.4.pld/Makefile	Thu Jun 10 17:04:24 1999
@@ -1,4 +1,6 @@
-CFLAGS=-Wall -O6 -fomit-frame-pointer -pipe
+CC=gcc
+OPT=-O2
+CFLAGS=$(OPT) -Wall -pipe -D_GNU_SOURCE
 # my compiler doesn't need -fno-strength-reduce
 LDFLAGS=-Wl,-warn-common -s
 
@@ -6,8 +8,8 @@
 		size mingetty
 
 install:	all
-		install -s mingetty /sbin/
-		install -m 644 mingetty.8 /usr/man/man8/
+		install -s -m 0755 -o root -g root mingetty /sbin/
+		install    -m 0644 -o root -g root mingetty.8 /usr/man/man8/
 
 mingetty:	mingetty.o
 
diff -Nur mingetty-0.9.4/mingetty.c mingetty-0.9.4.pld/mingetty.c
--- mingetty-0.9.4/mingetty.c	Thu Jun  6 12:29:30 1996
+++ mingetty-0.9.4.pld/mingetty.c	Thu Jun 10 17:06:27 1999
@@ -37,13 +37,17 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <sys/file.h>
-#include <sys/signal.h>
+#include <signal.h>
 #include <fcntl.h>
 #include <stdarg.h>
 #include <ctype.h>
 #include <utmp.h>
 #include <getopt.h>
 
+#ifndef _PATH_LOGIN
+#define _PATH_LOGIN "/bin/login"
+#endif
+
 #ifdef linux
 #include <sys/param.h>
 #define USE_SYSLOG
@@ -51,7 +55,7 @@
 
  /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
 #ifdef	USE_SYSLOG
-#include <syslog.h>
+#include <sys/syslog.h>
 #endif
 
 #define	ISSUE "/etc/issue"	/* displayed before the login prompt */
@@ -131,6 +135,7 @@
 	struct utmp ut;
 	int ut_fd;
 	struct utmp *utp;
+	void locktimeout();
 
 	utmpname (_PATH_UTMP);
 	setutent ();
@@ -158,7 +163,10 @@
 	endutent ();
 
 	if ((ut_fd = open (_PATH_WTMP, O_APPEND | O_WRONLY)) >= 0) {
+	        (void)signal(SIGALRM, locktimeout);
+		(void)alarm(3);
 		flock (ut_fd, LOCK_EX);
+		(void)alarm(0);
 		write (ut_fd, &ut, sizeof (ut));
 		flock (ut_fd, LOCK_UN);
 		close (ut_fd);
@@ -365,9 +373,9 @@
 			if (c == '\n' || c == '\r') {
 				*bp = 0;
 				break;
-			} else if (!isalnum (c) && c != '_')
-				error ("%s: invalid character for login name",
-								tty);
+			} else if (!isprint (c))
+				error ("%s: invalid character %c in login name",
+								tty, c);
 			else if (bp - logname >= sizeof (logname) - 1)
 				error ("%s: too long login name", tty);
 			else
@@ -437,3 +445,19 @@
 	exit (0);
 }
 
+ 
+void locktimeout()
+{
+#ifdef USE_SYSLOG
+    openlog (progname, LOG_PID, LOG_AUTH);
+    syslog(LOG_ALERT, "Lock failed on wtmp");
+    closelog ();
+#else
+    int fd;
+    char buf[]="Lock failed on wtmp\n";
+    if ((fd = open ("/dev/console", 1)) >= 0) {
+	write (fd, buf, strlen (buf));
+	close (fd);
+    }
+#endif
+}