From edd7aa7ffe95105f82688057ded753c8f7f66728 Mon Sep 17 00:00:00 2001
From: Chris Hanson <org/chris-hanson/cph>
Date: Sun, 26 Feb 2012 00:33:59 -0800
Subject: [PATCH] Fix broken pty support on Mac OS X 10.7.

---
 src/microcode/configure.ac |  5 +++--
 src/microcode/ux.h         |  4 ++++
 src/microcode/uxterm.c     | 39 ++++++++++++++++++++++++++++++++++++--
 3 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/src/microcode/configure.ac b/src/microcode/configure.ac
index 2a032eec0..146cb32a1 100644
--- a/src/microcode/configure.ac
+++ b/src/microcode/configure.ac
@@ -219,7 +219,7 @@ AC_CHECK_HEADERS([stropts.h time.h])
 AC_CHECK_HEADERS([sys/file.h sys/ioctl.h sys/mount.h sys/param.h sys/poll.h])
 AC_CHECK_HEADERS([sys/ptyio.h sys/socket.h sys/time.h sys/timex.h sys/un.h])
 AC_CHECK_HEADERS([sys/vfs.h])
-AC_CHECK_HEADERS([termio.h termios.h unistd.h utime.h])
+AC_CHECK_HEADERS([termio.h termios.h unistd.h util.h utime.h])
 AC_CHECK_HEADERS([dlfcn.h netdb.h signal.h])
 AC_CHECK_HEADERS([sys/mman.h float.h assert.h stdint.h])
 
@@ -527,7 +527,8 @@ AC_CHECK_FUNCS([kill])
 AC_CHECK_FUNCS([lockf log1p])
 AC_CHECK_FUNCS([madvise memcpy mkdir mktime modf])
 AC_CHECK_FUNCS([nice ntp_adjtime ntp_gettime])
-AC_CHECK_FUNCS([poll posix_madvise prealloc])
+AC_CHECK_FUNCS([openpty])
+AC_CHECK_FUNCS([poll posix_madvise posix_openpt prealloc])
 AC_CHECK_FUNCS([rename rmdir])
 AC_CHECK_FUNCS([select setitimer setpgrp setpgrp2 shmat sigaction])
 AC_CHECK_FUNCS([sighold socket statfs strchr strerror strstr strtol])
diff --git a/src/microcode/ux.h b/src/microcode/ux.h
index afd1cdf87..fe61928e5 100644
--- a/src/microcode/ux.h
+++ b/src/microcode/ux.h
@@ -296,6 +296,10 @@ USA.
 #include <stropts.h>
 #endif
 
+#ifdef HAVE_UTIL_H
+#  include <util.h>
+#endif
+
 #include "intext.h"
 #include "dstack.h"
 #include "osscheme.h"
diff --git a/src/microcode/uxterm.c b/src/microcode/uxterm.c
index 8dcda5039..2f0f45099 100644
--- a/src/microcode/uxterm.c
+++ b/src/microcode/uxterm.c
@@ -51,6 +51,12 @@ extern int UX_terminal_control_ok (int fd);
 #    endif
 #  endif /* HAVE_SGTTY_H */
 #endif /* not HAVE_TERMIOS_H nor HAVE_TERMIO_H */
+
+#if defined(HAVE_POSIX_OPENPT) || defined(HAVE_OPENPTY)
+#  undef TRY_OPEN_PTY_MASTER_BSD
+#else 
+#  define TRY_OPEN_PTY_MASTER_BSD 1
+#endif
 
 struct terminal_state
 {
@@ -732,6 +738,8 @@ OS_have_ptys_p (void)
 #endif
 }
 
+#ifdef TRY_OPEN_PTY_MASTER_BSD
+
 static const char *
 open_pty_master_bsd (Tchannel * master_fd, const char ** master_fname)
 {
@@ -770,11 +778,18 @@ open_pty_master_bsd (Tchannel * master_fd, const char ** master_fname)
   return (0);
 }
 
+#endif /* not TRY_OPEN_PTY_MASTER_BSD */
+
 #ifndef O_NOCTTY
 #  define O_NOCTTY 0
 #endif
 
-/* Open an available pty, putting channel in (*ptyv),
+/* Don't use posix_openpt in Mac OS X; openpty works properly. */
+#ifdef __APPLE__
+#  undef HAVE_POSIX_OPENPT
+#endif
+
+/* Open an available pty, putting channel in (*master_fd),
    and return the file name of the pty.
    Signal error if none available.  */
 
@@ -785,11 +800,27 @@ OS_open_pty_master (Tchannel * master_fd, const char ** master_fname)
   while (1)
     {
       static char slave_name [24];
+#ifdef HAVE_POSIX_OPENPT
+      int fd = (posix_openpt (O_RDWR | O_NOCTTY));
+#else
+#ifdef HAVE_OPENPTY
+      int fd;
+      {
+	int slave_fd;
+	int rc = (openpty ((&fd), (&slave_fd), slave_name, 0, 0));
+	if (rc < 0)
+	  fd = -1;
+	else
+	  (void) UX_close(slave_fd);
+      }
+#else
 #ifdef HAVE_GETPT
       int fd = (getpt ());
 #else
       int fd = (UX_open ("/dev/ptmx", (O_RDWR | O_NOCTTY), 0));
-#endif
+#endif /* not HAVE_GETPT */
+#endif /* not HAVE_OPENPTY */
+#endif /* not HAVE_POSIX_OPENPT */
       if (fd < 0)
 	{
 	  if (errno == EINTR)
@@ -797,9 +828,13 @@ OS_open_pty_master (Tchannel * master_fd, const char ** master_fname)
 	      deliver_pending_interrupts ();
 	      continue;
 	    }
+#ifdef TRY_OPEN_PTY_MASTER_BSD
 	  /* Try BSD open.  This is needed for Linux which might have
 	     Unix98 support in the library but not the kernel.  */
 	  return (open_pty_master_bsd (master_fd, master_fname));
+#else
+	  return (0);
+#endif
 	}
 #ifdef sonyrisc
       sony_block_sigchld ();
-- 
2.25.1