From f818840fea93cbbcb349aa426459e2849deab42c Mon Sep 17 00:00:00 2001
From: Tom Yu <tlyu@mit.edu>
Date: Wed, 24 Mar 1999 22:14:02 +0000
Subject: [PATCH] 	* ftpcmd.y (urgsafe_getc): New function; like getc()
 except it 	retries once if SIOCATMARK returns TRUE. 	(getline): Use
 urgsafe_getc() rather than getc() to avoid problems 	with certain Mac
 clients that cause the urgent pointer to end up 	in a location that
 results in EOF from getc().

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@11306 dc483132-0cff-0310-8789-dd5450dbe970
---
 src/appl/gssftp/ftpd/ChangeLog |  8 ++++++++
 src/appl/gssftp/ftpd/ftpcmd.y  | 35 ++++++++++++++++++++++++++++++----
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/src/appl/gssftp/ftpd/ChangeLog b/src/appl/gssftp/ftpd/ChangeLog
index ead623aef..3c7727883 100644
--- a/src/appl/gssftp/ftpd/ChangeLog
+++ b/src/appl/gssftp/ftpd/ChangeLog
@@ -1,3 +1,11 @@
+Wed Mar 24 17:11:32 1999  Tom Yu  <tlyu@mit.edu>
+
+	* ftpcmd.y (urgsafe_getc): New function; like getc() except it
+	retries once if SIOCATMARK returns TRUE.
+	(getline): Use urgsafe_getc() rather than getc() to avoid problems
+	with certain Mac clients that cause the urgent pointer to end up
+	in a location that results in EOF from getc().
+
 Fri Mar 12 07:35:01 1999  Tom Yu  <tlyu@mit.edu>
 
 	* ftpd.c (user): Remove extra "%s" in call to sprintf() to avoid
diff --git a/src/appl/gssftp/ftpd/ftpcmd.y b/src/appl/gssftp/ftpd/ftpcmd.y
index 5b75a4600..acd187112 100644
--- a/src/appl/gssftp/ftpd/ftpcmd.y
+++ b/src/appl/gssftp/ftpd/ftpcmd.y
@@ -49,6 +49,10 @@ static char sccsid[] = "@(#)ftpcmd.y	5.24 (Berkeley) 2/25/91";
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/socket.h>
+#include <sys/ioctl.h>
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
+#endif
 #include <sys/stat.h>
 #include <netinet/in.h>
 #include <arpa/ftp.h>
@@ -942,6 +946,26 @@ lookup(p, cmd)
 	return (0);
 }
 
+/*
+ * urgsafe_getc - hacked up getc to ignore EOF if SIOCATMARK returns TRUE
+ */
+int
+urgsafe_getc(f)
+	FILE *f;
+{
+	register int c;
+	int atmark;
+
+	c = getc(f);
+	if (c == EOF) {
+		if (ioctl(fileno(f), SIOCATMARK, &atmark) != -1) {
+			c = getc(f);
+			syslog(LOG_DEBUG, "atmark: c=%d", c);
+		}
+	}
+	return c;
+}
+
 #include <arpa/telnet.h>
 
 /*
@@ -954,6 +978,7 @@ getline(s, n, iop)
 {
 	register c;
 	register char *cs;
+	int atmark;
 
 	cs = s;
 /* tmpline may contain saved command from urgent mode interruption */
@@ -969,21 +994,23 @@ getline(s, n, iop)
 		if (c == 0)
 			tmpline[0] = '\0';
 	}
-	while ((c = getc(iop)) != EOF) {
+	while ((c = urgsafe_getc(iop)) != EOF) {
 		c &= 0377;
 		if (c == IAC) {
-		    if ((c = getc(iop)) != EOF) {
+			if (debug) syslog(LOG_DEBUG, "got IAC");
+		    if ((c = urgsafe_getc(iop)) != EOF) {
 			c &= 0377;
+			if (debug) syslog(LOG_DEBUG, "got IAC %d", c);
 			switch (c) {
 			case WILL:
 			case WONT:
-				c = getc(iop);
+				c = urgsafe_getc(iop);
 				printf("%c%c%c", IAC, DONT, 0377&c);
 				(void) fflush(stdout);
 				continue;
 			case DO:
 			case DONT:
-				c = getc(iop);
+				c = urgsafe_getc(iop);
 				printf("%c%c%c", IAC, WONT, 0377&c);
 				(void) fflush(stdout);
 				continue;
-- 
2.26.2