[5587] wait for pts device file to appear

[Gavin D. Smith]

Revision: 5587
          http://svn.sv.gnu.org/viewvc/?view=rev&root=texinfo&revision=5587
Author:   gavin
Date:     2014-05-19 21:39:46 +0000 (Mon, 19 May 2014)
Log Message:
-----------
wait for pts device file to appear

Modified Paths:
--------------
    trunk/ChangeLog
    trunk/info/t/Init-intera.inc

Modified: trunk/ChangeLog
===================================================================
--- trunk/ChangeLog     2014-05-19 21:24:11 UTC (rev 5586)
+++ trunk/ChangeLog     2014-05-19 21:39:46 UTC (rev 5587)
@@ -1,5 +1,10 @@
 2014-05-19  Gavin Smith  <address@hidden>
 
+       * info/t/Init-intera.inc: Confirm pts file exists before redirecting
+       stdin, stdout and stderr.
+
+2014-05-19  Gavin Smith  <address@hidden>
+
        * info/nodemenu.c (get_visited_nodes): Don't reuse a local
        variable for an unrelated purpose.  Declared static.  Argument
        not set to anything other than null in calling code removed.  All

Modified: trunk/info/t/Init-intera.inc
===================================================================
--- trunk/info/t/Init-intera.inc        2014-05-19 21:24:11 UTC (rev 5586)
+++ trunk/info/t/Init-intera.inc        2014-05-19 21:39:46 UTC (rev 5587)
@@ -12,12 +12,24 @@
 rm -f $GINFO_PTY_FILE
 ./pseudotty >$GINFO_PTY_FILE &
 PTY_PID=$!
-# Wait for pseudotty process to create file
-while test ! -f $GINFO_PTY_FILE;
+
+# Wait for pseudotty process to create file containing name
+# of pts device file to use for input/output.
+while test ! -f $GINFO_PTY_FILE
 do
        # Sleep for 1 ms if usleep is available
        usleep 1000 2>/dev/null || sleep 1
 done
-exec >"$(cat $GINFO_PTY_FILE | tr -d '\n')" 2>&1 0<&1
+PTS_DEVICE="$(cat $GINFO_PTY_FILE | tr -d '\n')"
 rm -f $GINFO_PTY_FILE
 
+# Wait for pts device file to actually appear.  This shouldn't be
+# necessary, but occasionally we get a "no such file or directory"
+# error when we redirect the file descriptors below.
+while test ! -c $PTS_DEVICE
+do
+       usleep 1000 2>/dev/null || sleep 1
+done
+
+exec 0>$PTS_DEVICE 1<&0 2<&0
+