[RFA] Use vfork in shell_escape

[Daniel Jacobowitz <drow@mvista.com>]

This patch is pretty obvious.  I couldn't figure out why my machine was
running out of memory; forking GDB to run an 'ls' during the maint.exp tests
can be a bit heavy, since it may have all of glibc's debug info loaded. 
This patch seems logical to me... OK to commit?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

2002-10-21  Daniel Jacobowitz  <drow@mvista.com>

	* cli/cli-cmds.c (shell_escape): Use vfork.

Index: cli/cli-cmds.c
===================================================================
RCS file: /cvs/src/src/gdb/cli/cli-cmds.c,v
retrieving revision 1.22
diff -u -p -r1.22 cli-cmds.c
--- cli/cli-cmds.c	22 Sep 2002 22:18:41 -0000	1.22
+++ cli/cli-cmds.c	22 Oct 2002 01:47:15 -0000
@@ -517,7 +517,7 @@ shell_escape (char *arg, int from_tty)
   else
     p++;			/* Get past '/' */
 
-  if ((pid = fork ()) == 0)
+  if ((pid = vfork ()) == 0)
     {
       if (!arg)
 	execl (user_shell, p, 0);