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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.268
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.268
+Problem:    Vim freezes when executing an external command with zsh.
+Solution:   Use O_NOCTTY both in the master and slave. (Bjorn Winckler)
+Files:	    src/os_unix.c
+
+
+*** ../vim-7.3.267/src/os_unix.c	2011-07-07 16:20:45.000000000 +0200
+--- src/os_unix.c	2011-08-04 19:06:14.000000000 +0200
+***************
+*** 3889,3899 ****
+  	if (p_guipty && !(options & (SHELL_READ|SHELL_WRITE)))
+  	{
+  	    pty_master_fd = OpenPTY(&tty_name);	    /* open pty */
+! 	    if (pty_master_fd >= 0 && ((pty_slave_fd =
+! 				    open(tty_name, O_RDWR | O_EXTRA, 0)) < 0))
+  	    {
+! 		close(pty_master_fd);
+! 		pty_master_fd = -1;
+  	    }
+  	}
+  	/*
+--- 3889,3909 ----
+  	if (p_guipty && !(options & (SHELL_READ|SHELL_WRITE)))
+  	{
+  	    pty_master_fd = OpenPTY(&tty_name);	    /* open pty */
+! 	    if (pty_master_fd >= 0)
+  	    {
+! 		/* Leaving out O_NOCTTY may lead to waitpid() always returning
+! 		 * 0 on Mac OS X 10.7 thereby causing freezes. Let's assume
+! 		 * adding O_NOCTTY always works when defined. */
+! #ifdef O_NOCTTY
+! 		pty_slave_fd = open(tty_name, O_RDWR | O_NOCTTY | O_EXTRA, 0);
+! #else
+! 		pty_slave_fd = open(tty_name, O_RDWR | O_EXTRA, 0);
+! #endif
+! 		if (pty_slave_fd < 0)
+! 		{
+! 		    close(pty_master_fd);
+! 		    pty_master_fd = -1;
+! 		}
+  	    }
+  	}
+  	/*
+*** ../vim-7.3.267/src/version.c	2011-08-04 19:34:55.000000000 +0200
+--- src/version.c	2011-08-04 19:36:00.000000000 +0200
+***************
+*** 711,712 ****
+--- 711,714 ----
+  {   /* Add new patch number below this line */
++ /**/
++     268,
+  /**/
+
+-- 
+Mental Floss prevents moral decay!
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///