[PATCH] specify arguments to debugee from commandline

[David Deephanphongs]

This patch will add the option --args=<args> to gdb.
It assumes that <args> is one argument (i.e., is in quotes, or has the
spaces escaped).
--args acts just like calling 'set args <args>' does from the gdb prompt:
gdb --args '--color=never -l gdb' /bin/ls
is equivalent to:
gdb /bin/ls
gdb> set args --color=never -l gdb

It also adds a description of --args when 'gdb -h' is run,
and adds a description of --args to the manpage.

The patch is against the 20010327 snapshot.

======= Changelog =========
2001-03-30  David Deephanphongs  <david@llamedos.org>

	* main.c:
	(set_inferior_args): Added extern prototype of set_inferior_args.
	(captured_main): Add --args option to gdb.
	* infcmd.c:
	(inferior_args): initialize to zero.
	(_initialize_infcmd): only call set_inferior_args (xtrdup ("")) 
	if inferior_args is set to zero.
	* gdb.1, main.c (print_gdb_help):
	Document --args option

====== Patch =======
diff -c3p gdb-orig/gdb.1 gdb/gdb.1
*** gdb-orig/gdb.1	Tue Mar  6 03:21:07 2001
--- gdb/gdb.1	Fri Mar 30 00:22:00 2001
*************** gdb \- The GNU Debugger
*** 38,43 ****
--- 38,46 ----
  .RB "[\|" "\-d "\c
  .I dir\c
  \&\|]
+ .RB "[\|" "\-args "\c
+ .I args\c
+ \&\|]
  .RB "[\|" \c
  .I prog\c
  .RB "[\|" \c
*************** Execute GDB commands from file \c
*** 264,269 ****
--- 267,280 ----
  Add \c
  .I directory\c
  \& to the path to search for source files.
+ 
+ 
+ .TP
+ .BI "\-args=" "args"\c
+ \&
+ Set \c
+ .I args\c
+ \& as the default arguments for the program to be debugged.
  .PP
  
  .TP
diff -c3p gdb-orig/infcmd.c gdb/infcmd.c
*** gdb-orig/infcmd.c	Wed Mar 21 11:42:38 2001
--- gdb/infcmd.c	Thu Mar 29 23:27:07 2001
*************** static void breakpoint_auto_delete_conte
*** 121,127 ****
  /* String containing arguments to give to the program, separated by spaces.
     Empty string (pointer to '\0') means no args.  */
  
! static char *inferior_args;
  
  /* File name for default use for standard in/out in the inferior.  */
  
--- 121,127 ----
  /* String containing arguments to give to the program, separated by spaces.
     Empty string (pointer to '\0') means no args.  */
  
! static char *inferior_args = 0;
  
  /* File name for default use for standard in/out in the inferior.  */
  
*************** Register name as argument means describe
*** 1967,1973 ****
    add_info ("float", float_info,
  	    "Print the status of the floating point unit\n");
  
!   set_inferior_args (xstrdup (""));	/* Initially no args */
    inferior_environ = make_environ ();
    init_environ (inferior_environ);
  }
--- 1967,1974 ----
    add_info ("float", float_info,
  	    "Print the status of the floating point unit\n");
  
!   if (inferior_args == 0)
! 	set_inferior_args (xstrdup (""));	/* Initially no args */
    inferior_environ = make_environ ();
    init_environ (inferior_environ);
  }
diff -c3p gdb-orig/main.c gdb/main.c
*** gdb-orig/main.c	Tue Mar  6 03:21:10 2001
--- gdb/main.c	Fri Mar 30 00:14:39 2001
*************** static void print_gdb_help (struct ui_fi
*** 89,94 ****
--- 89,98 ----
  extern int enable_external_editor;
  extern char *external_editor_command;
  
+ /* Used to set the arguments to the inferior program (i.e., the program that
+    is being debugged.) */
+ extern char *set_inferior_args (char *newargs);
+ 
  #ifdef __CYGWIN__
  #include <windows.h>		/* for MAX_PATH */
  #include <sys/cygwin.h>		/* for cygwin32_conv_to_posix_path */
*************** captured_main (void *data)
*** 284,289 ****
--- 288,294 ----
        {"windows", no_argument, &use_windows, 1},
        {"statistics", no_argument, 0, 13},
        {"write", no_argument, &write_files, 1},
+ 	  {"args", required_argument, 0, 14},
  /* Allow machine descriptions to add more options... */
  #ifdef ADDITIONAL_OPTIONS
        ADDITIONAL_OPTIONS
*************** captured_main (void *data)
*** 325,330 ****
--- 330,339 ----
  	    display_time = 1;
  	    display_space = 1;
  	    break;
+ 	  case 14:
+ 	    /* Set the arguments for the inferior program. */
+ 	    set_inferior_args ( xstrdup (optarg) );
+ 	    break;
  	  case 'f':
  	    annotation_level = 1;
  /* We have probably been invoked from emacs.  Disable window interface.  */
*************** Options:\n\n\
*** 824,829 ****
--- 833,841 ----
    -w                 Use a window interface.\n\
    --write            Set writing into executable and core files.\n\
    --xdb              XDB compatibility mode.\n\
+ ", stream);
+   fputs_unfiltered ("\
+   --args=args        Set arguments to give debugged program when it is run.\n\
  ", stream);
  #ifdef ADDITIONAL_OPTION_HELP
    fputs_unfiltered (ADDITIONAL_OPTION_HELP, stream);