From: Ben Wong <ben@wongs.net>
Date: Tue, 25 Sep 2007 01:48:30 -0700
Subject: Use GNU openpty library for pty.h

---
 configure.in | 11 +++++++++--
 openpty.c    |  4 ++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index a8f1441..af2cad0 100644
--- a/configure.in
+++ b/configure.in
@@ -57,7 +57,7 @@ AC_CONFIG_HEADER(config.h)
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS(fcntl.h paths.h sys/ioctl.h sys/time.h termios.h unistd.h \
-	err.h sys/cdefs.h sys/param.h util.h stropts.h)
+	err.h sys/cdefs.h sys/param.h util.h stropts.h pty.h)
 
 
 
@@ -97,7 +97,14 @@ AC_CHECK_FUNCS(strdup getpt isastream tcsetpgrp)
 
 
 dnl Check what is available for tty/pty allocation 
-AC_CHECK_FUNCS(_getpty getpseudotty openpty grantpt unlockpt)
+AC_CHECK_FUNCS(_getpty getpseudotty grantpt unlockpt)
+AC_CHECK_FUNCS(openpty,,
+	[AC_CHECK_LIB(util,openpty,
+		[AC_DEFINE(HAVE_OPENPTY)
+		LIBS="$LIBS -lutil"]
+	)])
+
+
 AC_MSG_CHECKING(for pseudo ttys)
 if test -c /dev/getpty && test $ac_cv_func_getpseudotty = yes
 then
diff --git a/openpty.c b/openpty.c
index 42cb203..0b8a642 100644
--- a/openpty.c
+++ b/openpty.c
@@ -25,6 +25,10 @@ static char	gl_slavename[GL_SLAVENAMELEN + 1] = {0};
 #include <util.h>
 #endif
 
+#ifdef HAVE_PTY_H
+#include <pty.h>
+#endif
+
 void	getmaster()
 {
 #ifdef DEBUG