RFA: fix CLI/9591 (pagination and --batch)

[Tom Tromey <tromey at redhat dot com>]

This needs a doc review.

This patch disables pagination when --batch is given.  As discussed on
this list earlier, the current situation is strange; pagination only
really makes sense interactively.

Built and regtested on x86-64 (compile farm).

Tom

2010-03-05  Tom Tromey  <tromey@redhat.com>

	PR cli/9591:
	* utils.c: Include main.h.
	(fputs_maybe_filtered): Don't pagination if `batch'.
	* main.h (batch): Declare.
	* main.c (batch): New global.
	(captured_main): Remove 'batch'.

2010-03-05  Tom Tromey  <tromey@redhat.com>

	PR cli/9591:
	* gdb.texinfo (Mode Options): Mention lack of pagination with
	--batch.

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 6bb7d52..69765fd 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -1028,7 +1028,8 @@ Run in batch mode.  Exit with status @code{0} after processing all the
 command files specified with @samp{-x} (and all commands from
 initialization files, if not inhibited with @samp{-n}).  Exit with
 nonzero status if an error occurs in executing the @value{GDBN} commands
-in the command files.
+in the command files.  Batch mode also disables pagination;
+@pxref{Screen Size}.
 
 Batch mode may be useful for running @value{GDBN} as a filter, for
 example to download and run a program on another computer; in order to
diff --git a/gdb/main.c b/gdb/main.c
index e261348..e9f852e 100644
--- a/gdb/main.c
+++ b/gdb/main.c
@@ -76,6 +76,9 @@ struct ui_file *gdb_stdtargin;
 struct ui_file *gdb_stdtarg;
 struct ui_file *gdb_stdtargerr;
 
+/* True if --batch or --batch-silent was seen.  */
+int batch = 0;
+
 /* Support for the --batch-silent option.  */
 int batch_silent = 0;
 
@@ -247,7 +250,6 @@ captured_main (void *data)
   int argc = context->argc;
   char **argv = context->argv;
   static int quiet = 0;
-  static int batch = 0;
   static int set_args = 0;
 
   /* Pointers to various arguments from command line.  */
diff --git a/gdb/main.h b/gdb/main.h
index 5e45724..d94903c 100644
--- a/gdb/main.h
+++ b/gdb/main.h
@@ -34,5 +34,6 @@ extern int gdb_main (struct captured_main_args *);
 extern int return_child_result;
 extern int return_child_result_value;
 extern int batch_silent;
+extern int batch;
 
 #endif
diff --git a/gdb/utils.c b/gdb/utils.c
index 52596ca..deab50d 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -58,6 +58,7 @@
 #include "gdb_obstack.h"
 #include "gdbcore.h"
 #include "top.h"
+#include "main.h"
 
 #include "inferior.h"		/* for signed_pointer_to_address */
 
@@ -2209,7 +2210,7 @@ fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
     return;
 
   /* Don't do any filtering if it is disabled.  */
-  if ((stream != gdb_stdout) || !pagination_enabled
+  if ((stream != gdb_stdout) || !pagination_enabled || batch
       || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX))
     {
       fputs_unfiltered (linebuffer, stream);