updated for version 7.0-130

runtime/doc/options.txt

@@ -4792,10 +4792,22 @@ A jump table for the options with a short description can be found at |Q_op|.
 	completion with CTRL-X CTRL-O. |i_CTRL-X_CTRL-O|
 	See |complete-functions| for an explanation of how the function is
 	invoked and what it should return.
-	This option is usually set by a filetype plugin.
+	This option is usually set by a filetype plugin:
 	|:filetype-plugin-on|
 
 
+				*'opendevice* *'odev* *'noopendevice* *'noodev*
+'opendevice' 'odev'	boolean	(default off)
+			global
+			{not in Vi}
+			{only for MS-DOS, MS-Windows and OS/2}
+	Enable reading and writing from devices.  This may get Vim stuck on a
+	device that can be opened but doesn't actually do the I/O.  Therefore
+	it is off by default.
+	Note that on MS-Windows editing "aux.h", "lpt1.txt" and the like also
+	result in editing a device.
+
+
 						*'operatorfunc'* *'opfunc'*
 'operatorfunc' 'opfunc'	string	(default: empty)
 			global

src/fileio.c

@@ -419,6 +419,20 @@ readfile(fname, sfname, from, lines_to_skip, lines_to_read, eap, flags)
     }
 #endif
 
+#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+    /*
+     * MS-Windows allows opening a device, but we will probably get stuck
+     * trying to read it.
+     */
+    if (!p_odev && mch_nodetype(fname) == NODE_WRITABLE)
+    {
+	filemess(curbuf, fname, (char_u *)_("is a device (disabled with 'opendevice' option"), 0);
+	msg_end();
+	msg_scroll = msg_save;
+	return FAIL;
+    }
+#endif
+
     /* set default 'fileformat' */
     if (set_options)
     {
@@ -3163,6 +3177,16 @@ buf_write(buf, fname, sfname, start, end, eap, append, forceit,
     }
     if (c == NODE_WRITABLE)
     {
+# if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+	/* MS-Windows allows opening a device, but we will probably get stuck
+	 * trying to write to it.  */
+	if (!p_odev)
+	{
+	    errnum = (char_u *)"E796: ";
+	    errmsg = (char_u *)_("writing to device disabled with 'opendevice' option");
+	    goto fail;
+	}
+# endif
 	device = TRUE;
 	newfile = TRUE;
 	perm = -1;

src/option.c

@@ -1810,6 +1810,14 @@ static struct vimoption
     {"open",	    NULL,   P_BOOL|P_VI_DEF,
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L}},
+    {"opendevice",  "odev", P_BOOL|P_VI_DEF,
+#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+			    (char_u *)&p_odev, PV_NONE,
+#else
+			    (char_u *)NULL, PV_NONE,
+#endif
+			    {(char_u *)FALSE, (char_u *)FALSE}
+			    },
     {"operatorfunc", "opfunc", P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_opfunc, PV_NONE,
 			    {(char_u *)"", (char_u *)0L} },

src/option.h

@@ -618,6 +618,9 @@ EXTERN int	p_more;		/* 'more' */
 #ifdef FEAT_MZSCHEME
 EXTERN long	p_mzq;		/* 'mzquantum */
 #endif
+#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+EXTERN int	p_odev;		/* 'opendevice' */
+#endif
 EXTERN char_u	*p_opfunc;	/* 'operatorfunc' */
 EXTERN char_u	*p_para;	/* 'paragraphs' */
 EXTERN int	p_paste;	/* 'paste' */

src/os_win32.c

@@ -2702,6 +2702,12 @@ mch_nodetype(char_u *name)
     HANDLE	hFile;
     int		type;
 
+    /* We can't open a file with a name "\\.\con" or "\\.\prn" and trying to
+     * read from it later will cause Vim to hang.  Thus return NODE_WRITABLE
+     * here. */
+    if (STRNCMP(name, "\\\\.\\", 4) == 0)
+	return NODE_WRITABLE;
+
     hFile = CreateFile(name,		/* file name */
 		GENERIC_WRITE,		/* access mode */
 		0,			/* share mode */

src/version.c

@@ -666,6 +666,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    130,
 /**/
     129,
 /**/