--- a/src/ChangeLog	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/ChangeLog	Tue Feb 15 12:06:44 2005 +0000
@@ -1,3 +1,16 @@
+2005-02-15  John W. Eaton  <jwe@octave.org>
+
+	* pt-mat.cc (tree_matrix::rvalue): Min size of ra_idx is 2.
+
+	* file-io.cc (Ffclear): New function.
+
+	* sighandlers.h: Define SIGCHLD if it is not already defined and
+	SIGCLD is defined.
+
+	* sighandlers.cc (octave_set_signal_handler): Request system calls
+	restarted if interrupted by signals (except for SIGALRM).
+	* dirfns.cc (Fls): Don't bother with sleeping or checking errno.
+
 2005-02-11  John W. Eaton  <jwe@octave.org>
 
 	* sighandlers.cc (sigpipe_handler): Don't try to take action.

--- a/src/dirfns.cc	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/dirfns.cc	Tue Feb 15 12:06:44 2005 +0000
@@ -182,16 +182,8 @@
 
   unwind_protect::add (cleanup_iprocstream, cmd);
 
-  // XXX FIXME XXX -- Perhaps we should read more than one character
-  // at a time and find a way to avoid the call to octave_usleep as
-  // well?
-
   if (cmd && *cmd)
     {
-      // This is a bit of a kluge...
-
-      octave_usleep (100);
-
       char ch;
 
       OSSTREAM output_buf;
@@ -204,16 +196,7 @@
 	      output_buf << ch;
 	    }
 	  else
-	    {
-	      if (! cmd->eof () && errno == EAGAIN)
-		{
-		  cmd->clear ();
-
-		  octave_usleep (100);
-		}
-	      else
-		break;
-	    }
+	    break;
 	}
 
       output_buf << OSSTREAM_ENDS;

--- a/src/file-io.cc	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/file-io.cc	Tue Feb 15 12:06:44 2005 +0000
@@ -219,6 +219,31 @@
   return retval;
 }
 
+DEFUN (fclear, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} fclear (@var{fid})\n\
+Clear the stream state for the specified file.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin == 1)
+    {
+      int fid = octave_stream_list::get_file_number (args (0));
+
+      octave_stream os = octave_stream_list::lookup (fid, "fclear");
+
+      if (! error_state)
+	os.clearerr ();
+    }
+  else
+    print_usage ("fclear");
+
+  return retval;
+}
+
 DEFUN (fflush, args, ,
   "-*- texinfo -*-\n\
 @deftypefn {Built-in Function} {} fflush (@var{fid})\n\

--- a/src/pt-mat.cc	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/pt-mat.cc	Tue Feb 15 12:06:44 2005 +0000
@@ -603,7 +603,8 @@
 
       // Now, extract the values from the individual elements and
       // insert them in the result matrix.
-      Array<int> ra_idx (dv.length (), 0);
+      int dv_len = dv.length ();
+      Array<int> ra_idx (dv_len > 1 ? dv_len : 2, 0);
       for (tm_const::iterator p = tmp.begin (); p != tmp.end (); p++)
 	{
 	  tm_row_const row = *p;

--- a/src/sighandlers.cc	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/sighandlers.cc	Tue Feb 15 12:06:44 2005 +0000
@@ -176,11 +176,28 @@
 {
 #if defined (HAVE_POSIX_SIGNALS)
   struct sigaction act, oact;
+
   act.sa_handler = handler;
   act.sa_flags = 0;
+
+  if (sig == SIGALRM)
+    {
+#if defined (SA_INTERRUPT)
+      act.sa_flags |= SA_INTERRUPT;
+#endif
+    }
+  else
+    {
+#if defined (SA_RESTART)
+      act.sa_flags |= SA_RESTART;
+#endif
+    }
+
   sigemptyset (&act.sa_mask);
   sigemptyset (&oact.sa_mask);
+
   sigaction (sig, &act, &oact);
+
   return oact.sa_handler;
 #else
   return signal (sig, handler);

--- a/src/sighandlers.h	Mon Feb 14 15:48:47 2005 +0000
+++ b/src/sighandlers.h	Tue Feb 15 12:06:44 2005 +0000
@@ -61,6 +61,10 @@
     } \
   while (0)
 
+#if !defined (SIGCHLD) && defined (SIGCLD)
+#define SIGCHLD SIGCLD
+#endif
+
 #if defined (HAVE_POSIX_SIGNALS)
 #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
 #define UNBLOCK_CHILD(ovar) sigprocmask (SIG_SETMASK, &ovar, 0)