diff -up netkit-telnet-0.17/telnetd/ext.h.sa-01-49 netkit-telnet-0.17/telnetd/ext.h

--- netkit-telnet-0.17/telnetd/ext.h.sa-01-49	1999-12-12 15:59:44.000000000 +0100

+++ netkit-telnet-0.17/telnetd/ext.h	2011-01-20 22:39:54.000000000 +0100

@@ -86,7 +86,10 @@ extern char *neturg;		/* one past last b

 extern int pcc, ncc;

 /* printf into netobuf */

-void netoprintf(const char *fmt, ...) __attribute((format (printf, 1, 2))); 

+/* void netoprintf(const char *fmt, ...) __attribute((format (printf, 1, 2))); */

+#define netoprintf output_data

+int	output_data(const char *, ...) __attribute((format (printf, 1, 2))); 

+void	output_datalen(const char *, int);

 extern int pty, net;

 extern char *line;

@@ -182,7 +185,10 @@ void tty_setsofttab(int);

 void tty_tspeed(int);

 void willoption(int);

 void wontoption(int);

+

+#if 0

 void writenet(unsigned char *, int);

+#endif

 #if defined(ENCRYPT)

 extern void (*encrypt_output)(unsigned char *, int);

diff -up netkit-telnet-0.17/telnetd/slc.c.sa-01-49 netkit-telnet-0.17/telnetd/slc.c

--- netkit-telnet-0.17/telnetd/slc.c.sa-01-49	1999-12-12 15:59:44.000000000 +0100

+++ netkit-telnet-0.17/telnetd/slc.c	2011-01-20 22:39:54.000000000 +0100

@@ -183,7 +183,7 @@ int end_slc(unsigned char **bufp) {

 	else {

 	    snprintf(slcbuf+slcoff, sizeof(slcbuf)-slcoff, "%c%c", IAC, SE);

 	    slcoff += 2;

-	    writenet(slcbuf, slcoff);

+	    output_datalen(slcbuf, slcoff);

 	    netflush();  /* force it out immediately */

 	}

     }

diff -up netkit-telnet-0.17/telnetd/state.c.sa-01-49 netkit-telnet-0.17/telnetd/state.c

--- netkit-telnet-0.17/telnetd/state.c.sa-01-49	1999-12-12 20:41:44.000000000 +0100

+++ netkit-telnet-0.17/telnetd/state.c	2011-01-20 22:43:34.000000000 +0100

@@ -37,6 +37,7 @@

 char state_rcsid[] = 

   "$Id: state.c,v 1.12 1999/12/12 19:41:44 dholland Exp $";

+#include <stdarg.h>

 #include "telnetd.h"

 int not42 = 1;

@@ -1365,7 +1366,7 @@ void send_status(void) {

     ADD(IAC);

     ADD(SE);

-    writenet(statusbuf, ncp - statusbuf);

+    output_datalen(statusbuf, ncp - statusbuf);

     netflush();	/* Send it on its way */

     DIAG(TD_OPTIONS, {printsub('>', statusbuf, ncp - statusbuf); netflush();});

diff -up netkit-telnet-0.17/telnetd/termstat.c.sa-01-49 netkit-telnet-0.17/telnetd/termstat.c

--- netkit-telnet-0.17/telnetd/termstat.c.sa-01-49	1999-12-12 15:59:45.000000000 +0100

+++ netkit-telnet-0.17/telnetd/termstat.c	2011-01-20 22:39:54.000000000 +0100

@@ -128,7 +128,6 @@ static int _terminit = 0;

 	void

 localstat()

 {

-	void netflush();

 	int need_will_echo = 0;

 	/*

diff -up netkit-telnet-0.17/telnetd/utility.c.sa-01-49 netkit-telnet-0.17/telnetd/utility.c

--- netkit-telnet-0.17/telnetd/utility.c.sa-01-49	2011-01-20 22:39:54.000000000 +0100

+++ netkit-telnet-0.17/telnetd/utility.c	2011-01-20 22:48:02.000000000 +0100

@@ -38,8 +38,10 @@ char util_rcsid[] = 

   "$Id: utility.c,v 1.11 1999/12/12 14:59:45 dholland Exp $";

 #define PRINTOPTIONS

+#define _GNU_SOURCE

 #include <stdarg.h>

+#include <stdio.h>

 #include <sys/utsname.h>

 #ifdef AUTHENTICATE

@@ -52,6 +54,53 @@ char util_rcsid[] = 

  * utility functions performing io related tasks

  */

+/*

+ * This function appends data to nfrontp and advances nfrontp.

+ * Returns the number of characters written altogether (the

+ * buffer may have been flushed in the process).

+ */

+

+int

+output_data(const char *format, ...)

+{

+	va_list args;

+	int len;

+	char *buf;

+

+	va_start(args, format);

+	if ((len = vasprintf(&buf, format, args)) == -1)

+		return -1;

+	output_datalen(buf, len);

+	va_end(args);

+	free(buf);

+	return (len);

+}

+

+void

+output_datalen(const char *buf, int len)

+{

+	int remaining, copied;

+	

+	remaining = BUFSIZ - (nfrontp - netobuf);

+	while (len > 0) {

+		/* Free up enough space if the room is too low*/

+		if ((len > BUFSIZ ? BUFSIZ : len) > remaining) {

+			netflush();

+			remaining = BUFSIZ - (nfrontp - netobuf);

+		}

+

+		/* Copy out as much as will fit */

+		copied = remaining > len ? len : remaining;

+		memmove(nfrontp, buf, copied);

+		nfrontp += copied;

+		len -= copied;

+		remaining -= copied;

+		buf += copied;

+	}

+	return;

+}

+

+/**

 void

 netoprintf(const char *fmt, ...)

 {

@@ -67,7 +116,7 @@ netoprintf(const char *fmt, ...)

       va_end(ap);

       if (len<0 || len==maxsize) {

-	 /* didn't fit */

+		/ * did not fit * /

 	 netflush();

       }

       else {

@@ -76,6 +125,7 @@ netoprintf(const char *fmt, ...)

    }

    nfrontp += len;

 }

+*/

 /*

  * ttloop

@@ -273,10 +323,15 @@ netflush(void)

     int n;

     if ((n = nfrontp - nbackp) > 0) {

+

+#if 0

+	/* XXX This causes output_data() to recurse and die */

 	DIAG(TD_REPORT,

 	    { netoprintf("td: netflush %d chars\r\n", n);

 	      n = nfrontp - nbackp;  /* update count */

 	    });

+#endif

+

 #if	defined(ENCRYPT)

 	if (encrypt_output) {

 		char *s = nclearto ? nclearto : nbackp;

@@ -310,11 +365,14 @@ netflush(void)

 	    }

 	}

     }

-    if (n < 0) {

-	if (errno == EWOULDBLOCK || errno == EINTR)

-		return;

-	cleanup(0);

-    }

+

+	 if (n == -1) {

+		if (errno == EWOULDBLOCK || errno == EINTR)

+		  return;

+		cleanup(0);

+		/* NOTREACHED */

+	 }

+

     nbackp += n;

 #if	defined(ENCRYPT)

     if (nbackp > nclearto)

@@ -332,7 +390,7 @@ netflush(void)

     return;

 }  /* end of netflush */

-

+#if 0

 /*

  * writenet

  *

@@ -355,7 +413,7 @@ void writenet(register unsigned char *pt

 	nfrontp += len;

 }  /* end of writenet */

-

+#endif

 /*

  * miscellaneous functions doing a variety of little jobs follow ...