[6350] TIOCSWINSZ ioctl in pseudotty

[Gavin D. Smith]

Revision: 6350
          http://svn.sv.gnu.org/viewvc/?view=rev&root=texinfo&revision=6350
Author:   gavin
Date:     2015-06-20 15:28:39 +0000 (Sat, 20 Jun 2015)
Log Message:
-----------
TIOCSWINSZ ioctl in pseudotty

Modified Paths:
--------------
    trunk/ChangeLog
    trunk/info/pseudotty.c
    trunk/info/t/c-u-m-x-scroll-forward.sh

Modified: trunk/ChangeLog
===================================================================
--- trunk/ChangeLog     2015-06-20 14:15:09 UTC (rev 6349)
+++ trunk/ChangeLog     2015-06-20 15:28:39 UTC (rev 6350)
@@ -1,3 +1,8 @@
+2015-06-20  Gavin Smith  <address@hidden>
+
+       * info/pseudotty.c: Attempt to register display size as 0 by 0.
+       * info/t/c-u-m-x-scroll-forward.sh: Comment changed.
+
 2015-06-20  Eli Zaretskii  <address@hidden>
 
        * info/pcterm.c (kill): Move prototype from here...

Modified: trunk/info/pseudotty.c
===================================================================
--- trunk/info/pseudotty.c      2015-06-20 14:15:09 UTC (rev 6349)
+++ trunk/info/pseudotty.c      2015-06-20 15:28:39 UTC (rev 6350)
@@ -37,6 +37,8 @@
 #include <stropts.h>
 #endif
 
+#include "termdep.h"
+
 /* Used by "error" function. */
 const char *program_name = "pseudotty";
 
@@ -84,6 +86,19 @@
   */
 #endif
 
+#if defined (TIOCSWINSZ)
+  {
+    struct winsize ws;
+    ws.ws_col = ws.ws_row = 0;
+
+    error (0, 0, "attempting to set window size");
+    if (ioctl (master, TIOCSWINSZ, &ws) == 0)
+      error (0, 0, "...succeeded");
+    else
+      error (0, 0, "...failed");
+  }
+#endif 
+
   printf ("%s\n", name);
   if (fclose (stdout) != 0)
     error (1, 0, "error closing stdout: aborting");

Modified: trunk/info/t/c-u-m-x-scroll-forward.sh
===================================================================
--- trunk/info/t/c-u-m-x-scroll-forward.sh      2015-06-20 14:15:09 UTC (rev 
6349)
+++ trunk/info/t/c-u-m-x-scroll-forward.sh      2015-06-20 15:28:39 UTC (rev 
6350)
@@ -21,8 +21,10 @@
 # Set screen geometry so that scrolling down by screens goes to 
 # predictable places.  5 lines of the node should be visible at once, 1 
 # status line and 1 line for the echo area.
-# This relies on the TIOCGWINSZ ioctl failing for the pseudotty (see 
-# terminal_get_screen_size in terminal.c).
+# This relies on the TIOCGWINSZ ioctl either failing for the pseudotty,
+# or returning non-positive values.
+# (See terminal_get_screen_size in terminal.c, and the use of
+# TIOCSWINSZ in pseudotty.c.)
 LINES=7; export LINES
 COLUMNS=80; export COLUMNS