From: Richard M. Stallman <rms@gnu.org>
Date: Mon, 10 Sep 2007 17:34:24 +0000 (+0000)
Subject: (x_term_init): Give error if can't open DISPLAY_NAME.
X-Git-Tag: emacs-pretest-23.0.90~10980
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=5632bd0fc4b3f06fff0ce55d53675f285b6a43d2;p=emacs.git

(x_term_init): Give error if can't open DISPLAY_NAME.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index 0324d958aa4..e476eac4a3e 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2007-09-10  Richard Stallman  <rms@gnu.org>
+
+	* xterm.c (x_term_init): Give error if can't open DISPLAY_NAME.
+
 2007-09-10  Micha,Ak(Bl Cadilhac  <michael@cadilhac.name>
 
 	* lisp.h (struct Lisp_Subr): Rename `prompt' field to `intspec'.
diff --git a/src/xterm.c b/src/xterm.c
index 0e56b04c1b0..af35fbe8799 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -10586,9 +10586,12 @@ get_bits_and_offset (mask, bits, offset)
   *bits = nr;
 }
 
+/* Return 1 if display DISPLAY is available for use, 0 otherwise.
+   But don't permanently open it, just test its availability.  */
+
 int
 x_display_ok (display)
-    const char * display;
+    const char *display;
 {
     int dpy_ok = 1;
     Display *dpy;
@@ -10601,6 +10604,10 @@ x_display_ok (display)
     return dpy_ok;
 }
 
+/* Open a connection to X display DISPLAY_NAME, and return
+   the structure that describes the open display.
+   If we cannot contact the display, return null.  */
+
 struct x_display_info *
 x_term_init (display_name, xrm_option, resource_name)
      Lisp_Object display_name;
@@ -10621,6 +10628,9 @@ x_term_init (display_name, xrm_option, resource_name)
       ++x_initialized;
     }
 
+  if (! x_display_ok (SDATA (display_name)))
+    error ("Display %s can't be opened", SDATA (display_name));
+
 #ifdef USE_GTK
   {
 #define NUM_ARGV 10