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Re: Proposed patch for gdb/mi 741


No problem.  Hopefully the last iteration.  I added the
reset option to -environment-path and also added new tests
to mi-basics.exp.  The Makefile.in has been cleaned
up properly w/r the header files and I fixed the typo you noticed
in the call to mi_getopt.

Ok to commit?

-- Jeff J.

gdb/ChangeLog:

2002-12-09  Jeff Johnston  <jjohnstn@redhat.com>

        * defs.h (init_last_source_visited): New prototype.
        (add_path): Ditto.
        * source.c (add_path): New function that adds to a specified path.
        (mod_path): Change to call add_path.
        (init_last_source_visited): New function to allow interfaces to
        initialize static variable: last_source_visited.  Part of fix
        for PR gdb/741.
	* Makefile.in: Add support for mi/mi-cmd-env.c.
	
gdb/mi/ChangeLog:

2002-12-09  Jeff Johnston  <jjohnstn@redhat.com>

        * mi-cmds.c (-environment-directory) Change to use mi_cmd_env_dir,
        (-environment-cd): Change to use mi_cmd_env_cd,.
        (-environment-pwd): Change to use mi_cmd_env_pwd.
        (-environment-path): Change to use mi_cmd_env_path.
        * mi-cmds.h (mi_cmd_env_cd, mi_cmd_env_dir): New prototypes.
        (mi_cmd_env_path, mi_cmd_env_pwd): Ditto.
        * mi-cmd-env.c: New file.  Part of fix for PR gdb/741.
        * gdbmi.texinfo (environment-cd): Update output and example.
        (environment-pwd): Ditto.
        (environment-dir): Update output, description, and examples.
        (environment-path): Ditto.

gdb/testsuite/gdb.mi/ChangeLog:

2002-12-09  Jeff Johnston  <jjohnstn@redhat.com>

        * mi-basics.exp: Change tests for -environment-directory.  Also add
        tests for -environment-cd, -environment-pwd, and -environment-path.
	Part of fix for PR gdb/741.

Elena Zannoni wrote:
J. Johnston writes:
>
Ok I noticed a few more things in mi-cmd-env.c, the rest is ok.

Sorry, another iteration....

See below.



> gdb/ChangeLog:
> > 2002-11-11 Jeff Johnston <jjohnstn@redhat.com>
> > * defs.h (init_last_source_visited): New prototype.
> (add_path): Ditto.
> * source.c (add_path): New function that adds to a specified path.
> (mod_path): Change to call add_path.
> (init_last_source_visited): New function to allow interfaces to > initialize static variable: last_source_visited. Part of fix
> for PR gdb/741.
> * Makefile.in: Add support for mi/mi-cmd-env.c.
>
> gdb/mi/ChangeLog:
> > 2002-11-11 Jeff Johnston <jjohnstn@redhat.com>
> > * mi-cmds.c (-environment-directory) Change to use mi_cmd_env_dir,
> (-environment-cd): Change to use mi_cmd_env_cd,.
> (-environment-pwd): Change to use mi_cmd_env_pwd.
> (-environment-path): Change to use mi_cmd_env_path.
> * mi-cmds.h (mi_cmd_env_cd, mi_cmd_env_dir): New prototypes.
> (mi_cmd_env_path, mi_cmd_env_pwd): Ditto.
> * mi-cmd-env.c: New file. Part of fix for PR gdb/741.
> * gdbmi.texinfo (environment-cd): Update output and example.
> (environment-pwd): Ditto.
> (environment-dir): Update output, description, and examples.
> (environment-path): Ditto.
> > gdb/testsuite/gdb.mi/ChangeLog:
> > 2002-11-11 Jeff Johnston <jjohnstn@redhat.com>
> > * mi-basics.exp: Change tests for -environment-directory. Also add
> tests for -environment-cd and -environment-pwd. Part of fix for
> PR gdb/741.Index: defs.h
> ===================================================================
> RCS file: /cvs/src/src/gdb/defs.h,v
> retrieving revision 1.102
> diff -u -r1.102 defs.h
> --- defs.h 15 Oct 2002 02:16:51 -0000 1.102
> +++ defs.h 9 Nov 2002 00:33:14 -0000
> @@ -572,9 +572,15 @@
> > extern void mod_path (char *, char **);
> > +extern void add_path (char *, char **, int);
> +
> extern void directory_command (char *, int);
> > +extern char *source_path;
> +
> extern void init_source_path (void);
> +
> +extern void init_last_source_visited (void);
> > extern char *symtab_to_filename (struct symtab *);
> > Index: source.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/source.c,v
> retrieving revision 1.36
> diff -u -r1.36 source.c
> --- source.c 24 Oct 2002 21:02:53 -0000 1.36
> +++ source.c 9 Nov 2002 00:33:14 -0000
> @@ -357,6 +357,12 @@
> forget_cached_source_info ();
> }
> > +void
> +init_last_source_visited (void)
> +{
> + last_source_visited = NULL;
> +}
> +
> /* Add zero or more directories to the front of the source path. */
> > void
> @@ -387,6 +393,18 @@
> void
> mod_path (char *dirname, char **which_path)
> {
> + add_path (dirname, which_path, 1);
> +}
> +
> +/* Workhorse of mod_path. Takes an extra argument to determine
> + if dirname should be parsed for separators that indicate multiple
> + directories. This allows for interfaces that pre-parse the dirname
> + and allow specification of traditional separator characters such
> + as space or tab. */
> +
> +void
> +add_path (char *dirname, char **which_path, int parse_separators)
> +{
> char *old = *which_path;
> int prefix = 0;
> > @@ -403,9 +421,16 @@
> struct stat st;
> > {
> - char *separator = strchr (name, DIRNAME_SEPARATOR);
> - char *space = strchr (name, ' ');
> - char *tab = strchr (name, '\t');
> + char *separator = NULL;
> + char *space = NULL;
> + char *tab = NULL;
> +
> + if (parse_separators)
> + {
> + separator = strchr (name, DIRNAME_SEPARATOR);
> + space = strchr (name, ' ');
> + tab = strchr (name, '\t');
> + }
> > if (separator == 0 && space == 0 && tab == 0)
> p = dirname = name + strlen (name);
> @@ -536,7 +561,8 @@
> tinybuf[0] = DIRNAME_SEPARATOR;
> tinybuf[1] = '\0';
> > - /* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */
> + /* If we have already tacked on a name(s) in this command, be sure they stay > + on the front as we tack on some more. */
> if (prefix)
> {
> char *temp, c;
> Index: Makefile.in
> ===================================================================
> RCS file: /cvs/src/src/gdb/Makefile.in,v
> retrieving revision 1.278
> diff -u -r1.278 Makefile.in
> --- Makefile.in 8 Nov 2002 20:48:54 -0000 1.278
> +++ Makefile.in 9 Nov 2002 00:33:14 -0000
> @@ -166,12 +166,12 @@
> #
> SUBDIR_MI_OBS = \
> mi-out.o mi-console.o \
> - mi-cmds.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o \
> + mi-cmds.o mi-cmd-env.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o \
> mi-cmd-disas.o \
> mi-main.o mi-parse.o mi-getopt.o
> SUBDIR_MI_SRCS = \
> mi/mi-out.c mi/mi-console.c \
> - mi/mi-cmds.c \
> + mi/mi-cmds.c mi/mi-cmd-env.c \
> mi/mi-cmd-var.c mi/mi-cmd-break.c mi/mi-cmd-stack.c \
> mi/mi-cmd-disas.c \
> mi/mi-main.c mi/mi-parse.c mi/mi-getopt.c
> @@ -2487,6 +2487,10 @@
> mi-cmd-disas.o: $(srcdir)/mi/mi-cmd-disas.c $(defs_h) $(target_h) $(value_h) \
> $(mi_cmds_h) $(mi_getopt_h) $(ui_out_h) $(gdb_string_h) $(disasm_h)
> $(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-disas.c
> +mi-cmd-env.o: $(srcdir)/mi/mi-cmd-env.c $(defs_h) $(mi_cmds_h) $(ui_out_h) \
> + $(mi_out_h) $(varobj_h) $(value_h) $(gdb_string_h) $(inferior.h) \
> + $(mi_getopt_h)
> + $(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-env.c
> mi-cmd-stack.o: $(srcdir)/mi/mi-cmd-stack.c $(defs_h) $(target_h) $(frame_h) \
> $(value_h) $(mi_cmds_h) $(ui_out_h) $(symtab_h)
> $(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-stack.c
> Index: mi/mi-cmd-env.c
> ===================================================================
> RCS file: mi/mi-cmd-env.c
> diff -N mi/mi-cmd-env.c
> --- mi/mi-cmd-env.c 1 Jan 1970 00:00:00 -0000
> +++ mi/mi-cmd-env.c 9 Nov 2002 00:33:14 -0000
> @@ -0,0 +1,202 @@
> +/* MI Command Set - environment commands.
> + Copyright 2002 Free Software Foundation, Inc.
> + Contributed by Red Hat Inc.
> +
> + This file is part of GDB.
> +
> + This program is free software; you can redistribute it and/or modify
> + it under the terms of the GNU General Public License as published by
> + the Free Software Foundation; either version 2 of the License, or
> + (at your option) any later version.
> +
> + This program is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + GNU General Public License for more details.
> +
> + You should have received a copy of the GNU General Public License
> + along with this program; if not, write to the Free Software
> + Foundation, Inc., 59 Temple Place - Suite 330,
> + Boston, MA 02111-1307, USA. */
> +
> +#include <string.h>
> +#include <sys/stat.h>
> +
> +#include "defs.h"
> +#include "target.h"
> +#include "frame.h"
> +#include "value.h"
> +#include "mi-cmds.h"
> +#include "mi-out.h"
> +#include "mi-getopt.h"
> +#include "ui-out.h"
> +#include "symtab.h"
> +#include "filenames.h"
> +#include "environ.h"
> +#include "command.h"
> +#include "top.h"
> +#include "inferior.h"
> +

Are all these includes needed? they are not listed in the Makefile
dependencies.


> +static void env_cli_command (const char *cli, char *args);
> +static void env_mod_path (char *dirname, char **which_path);
> +
> +static const char path_var_name[] = "PATH";
> +
> +/* The following is copied from mi-main.c so for m1 and below we
> + can perform old behavior and use cli commands. */
> +static void
> +env_execute_cli_command (const char *cli, char *args)
> +{
> + if (cli != 0)
> + {
> + struct cleanup *old_cleanups;
> + char *run;
> + xasprintf (&run, cli, args);
> + old_cleanups = make_cleanup (xfree, run);
> + execute_command ( /*ui */ run, 0 /*from_tty */ );
> + do_cleanups (old_cleanups);
> + return;
> + }
> +}
> +
> +
> +/* Print working directory. */
> +enum mi_cmd_result
> +mi_cmd_env_pwd (char *command, char **argv, int argc)
> +{
> + if (argc > 0)
> + error ("mi_cmd_env_pwd: No arguments required");
> + > + if (mi_version (uiout) < 2)
> + {
> + env_execute_cli_command ("pwd", NULL);
> + return MI_CMD_DONE;
> + }
> + > + /* Otherwise the mi level is 2 or higher. */
> +
> + getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
> + ui_out_field_string (uiout, "cwd", gdb_dirbuf);
> +
> + return MI_CMD_DONE;
> +}
> +
> +/* Change working directory. */
> +enum mi_cmd_result
> +mi_cmd_env_cd (char *command, char **argv, int argc)
> +{
> + if (argc == 0 || argc > 1)
> + error ("mi_cmd_env_cd: Usage DIRECTORY");
> + > + env_execute_cli_command ("cd %s", argv[0]);
> +
> + return MI_CMD_DONE;
> +}
> +
> +static void
> +env_mod_path (char *dirname, char **which_path)
> +{
> + if (dirname == 0 || dirname[0] == '\0')
> + return;
> +
> + /* Call add_path with last arg 0 to indicate not to parse for > + separator characters. */
> + add_path (dirname, which_path, 0);
> +}
> +
> +/* Add one or more directories to start of executable search path. */
> +enum mi_cmd_result
> +mi_cmd_env_path (char *command, char **argv, int argc)
> +{
> + char *exec_path;
> + char *env;
> + int i;
> +
> + if (mi_version (uiout) < 2)
> + {
> + for (i = argc - 1; i >= 0; --i)
> + env_execute_cli_command ("path %s", argv[i]);
> + return MI_CMD_DONE;
> + }
> +
> + /* Otherwise the mi level is 2 or higher. */
> + dont_repeat ();
> + env = get_in_environ (inferior_environ, path_var_name);
> +
> + /* Can be null if path is not set. */
> + if (!env)
> + env = "";
> + exec_path = xstrdup (env);
> +
> + for (i = argc - 1; i >= 0; --i)
> + env_mod_path (argv[i], &exec_path);
> +


Could you add a -reset option here too? We might as well have some symmetry.

> + set_in_environ (inferior_environ, path_var_name, exec_path);
> + xfree (exec_path);
> + env = get_in_environ (inferior_environ, path_var_name);
> + ui_out_field_string (uiout, "path", env);
> +
> + return MI_CMD_DONE;
> +}
> +
> +/* Add zero or more directories to the front of the source path. */
> +enum mi_cmd_result
> +mi_cmd_env_dir (char *command, char **argv, int argc)
> +{
> + int i;
> + int optind = 0;
> + int reset = 0;
> + char *optarg;
> + enum opt
> + {
> + RESET_OPT
> + };
> + static struct mi_opt opts[] =
> + {
> + {"r", RESET_OPT, 0},
> + 0
> + };
> +
> + dont_repeat ();
> +
> + if (mi_version (uiout) < 2)
> + {
> + for (i = argc - 1; i >= 0; --i)
> + env_execute_cli_command ("dir %s", argv[i]);
> + return MI_CMD_DONE;
> + }
> +
> + /* Otherwise mi level is 2 or higher. */
> + while (1)
> + {
> + int opt = mi_getopt ("mi_cmd_data_read_memory", argc, argv, opts,
^^^^^^^^^^^^^^^^^^^^^^^


> + &optind, &optarg);
> + if (opt < 0)
> + break;
> + switch ((enum opt) opt)
> + {
> + case RESET_OPT:
> + reset = 1;
> + break;
> + }
> + }
> + argv += optind;
> + argc -= optind;
> +
> + if (reset)
> + {
> + /* No args implies reset to default path. */
> + xfree (source_path);
> + init_source_path ();
> + }
> +
> + for (i = argc - 1; i >= 0; --i)
> + env_mod_path (argv[i], &source_path);
> + init_last_source_visited ();
> +
> + ui_out_field_string (uiout, "source-path", source_path);
> + forget_cached_source_info ();
> +
> + return MI_CMD_DONE;
> +}
> +
> Index: mi/mi-cmds.h
> ===================================================================
> RCS file: /cvs/src/src/gdb/mi/mi-cmds.h,v
> retrieving revision 1.5
> diff -u -r1.5 mi-cmds.h
> --- mi/mi-cmds.h 6 Mar 2001 08:21:45 -0000 1.5
> +++ mi/mi-cmds.h 9 Nov 2002 00:33:14 -0000
> @@ -64,6 +64,10 @@
> extern mi_cmd_argv_ftype mi_cmd_data_read_memory;
> extern mi_cmd_argv_ftype mi_cmd_data_write_memory;
> extern mi_cmd_argv_ftype mi_cmd_data_write_register_values;
> +extern mi_cmd_argv_ftype mi_cmd_env_cd;
> +extern mi_cmd_argv_ftype mi_cmd_env_dir;
> +extern mi_cmd_argv_ftype mi_cmd_env_path;
> +extern mi_cmd_argv_ftype mi_cmd_env_pwd;
> extern mi_cmd_args_ftype mi_cmd_exec_continue;
> extern mi_cmd_args_ftype mi_cmd_exec_finish;
> extern mi_cmd_args_ftype mi_cmd_exec_next;
> Index: mi/mi-cmds.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/mi/mi-cmds.c,v
> retrieving revision 1.8
> diff -u -r1.8 mi-cmds.c
> --- mi/mi-cmds.c 6 Mar 2001 08:21:45 -0000 1.8
> +++ mi/mi-cmds.c 9 Nov 2002 00:33:14 -0000
> @@ -56,10 +56,10 @@
> {"display-enable", 0, 0},
> {"display-insert", 0, 0},
> {"display-list", 0, 0},
> - {"environment-cd", "cd %s", 0},
> - {"environment-directory", "dir %s", 0},
> - {"environment-path", "path %s", 0},
> - {"environment-pwd", "pwd", 0},
> + {"environment-cd", 0, 0, mi_cmd_env_cd},
> + {"environment-directory", 0, 0, mi_cmd_env_dir},
> + {"environment-path", 0, 0, mi_cmd_env_path},
> + {"environment-pwd", 0, 0, mi_cmd_env_pwd},
> {"exec-abort", 0, 0},
> {"exec-arguments", "set args %s", 0},
> {"exec-continue", 0, mi_cmd_exec_continue},
> Index: gdbmi.texinfo
> ===================================================================
> RCS file: /cvs/src/src/gdb/mi/gdbmi.texinfo,v
> retrieving revision 1.29
> diff -u -r1.29 gdbmi.texinfo
> --- gdbmi.texinfo 3 Oct 2002 22:31:31 -0000 1.29
> +++ gdbmi.texinfo 9 Nov 2002 00:30:50 -0000
> @@ -1665,10 +1665,18 @@
> @subsubheading Synopsis
> > @example
> - -environment-directory @var{pathdir}
> + -environment-directory [ -r ] [ @var{pathdir} ]+
> @end example
> > -Add directory @var{pathdir} to beginning of search path for source files.
> +Add directories @var{pathdir} to beginning of search path for source files.
> +If the @samp{-r} option is used, the search path is reset to the default
> +search path. If directories @var{pathdir} are supplied in addition to the > +@samp{-r} option, the search path is first reset and then addition
> +occurs as normal.
> +Specifying multiple directories in a single command
> +results in the directories added to the beginning of the
> +search path in the same order they were presented in the command.
> +If no directories are specified, the current search path is displayed.
> > @subsubheading @value{GDBN} Command
> > @@ -1679,7 +1687,16 @@
> @smallexample
> (@value{GDBP})
> -environment-directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb
> -^done
> +^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
> +(@value{GDBP})
> +-environment-directory ""
> +^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
> +(@value{GDBP})
> +-environment-directory -r /home/jjohnstn/src/gdb
> +^done,source-path="/home/jjohnstn/src/gdb:$cdir:$cwd"
> +(@value{GDBP})
> +-environment-directory -r
> +^done,source-path="$cdir:$cwd"
> (@value{GDBP})
> @end smallexample
> > @@ -1690,10 +1707,12 @@
> @subsubheading Synopsis
> > @example
> - -environment-path ( @var{pathdir} )+
> + -environment-path [ @var{pathdir} ]+
> @end example
> > Add directories @var{pathdir} to beginning of search path for object files.
> +If no paths or an empty path is specified, the current object search path
> +is displayed with no modification.
> > @subsubheading @value{GDBN} Command
> > @@ -1704,7 +1723,10 @@
> @smallexample
> (@value{GDBP})
> -environment-path /kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb
> -^done
> +^done,path="/kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb:/usr/bin"
> +(@value{GDBP})
> +-environment-path > +^done,path="/kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb:/usr/bin"
> (@value{GDBP})
> @end smallexample
> > @@ -1729,8 +1751,7 @@
> @smallexample
> (@value{GDBP})
> -environment-pwd
> -~Working directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb.
> -^done
> +^done,cwd="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb"
> (@value{GDBP})
> @end smallexample
> > Index: mi-basics.exp
> ===================================================================
> RCS file: /cvs/src/src/gdb/testsuite/gdb.mi/mi-basics.exp,v
> retrieving revision 1.6
> diff -u -r1.6 mi-basics.exp
> --- mi-basics.exp 27 Jun 2001 17:27:07 -0000 1.6
> +++ mi-basics.exp 11 Nov 2002 21:11:07 -0000
> @@ -148,26 +148,52 @@
> global srcdir
> global subdir
> > - # Clear the search directories, then specify one to be searched
> + # Add to the search directories, display, then reset back to default
> # Tests:
> - # -environment-directory
> # -environment-directory arg
> + # -environment-directory > + # -environment-directory -r
> > #exp_internal 1
> - mi_gdb_test "202-environment-directory" \
> - "\\\^done" \
> + mi_gdb_test "202-environment-directory ${srcdir}/${subdir}" \
> + "\\\^done,source-path=\"${srcdir}/${subdir}:\\\$cdir:\\\$cwd\"" \
> + "environment-directory arg operation"
> +
> + mi_gdb_test "203-environment-directory" \
> + "\\\^done,source-path=\"${srcdir}/${subdir}:\\\$cdir:\\\$cwd\"" \
> + "environment-directory empty-string operation"
> +
> + mi_gdb_test "204-environment-directory -r" \
> + "\\\^done,source-path=\"\\\$cdir:\\\$cwd\"" \
> "environment-directory operation"
> > - mi_gdb_test "203-environment-directory ${srcdir}/${subdir}" \
> - "\\\^done" \
> - "environment-directory arg operation"
> #exp_internal 0
> }
> > +proc test_cwd_specification {} {
> + global mi_gdb_prompt
> + global objdir
> + global subdir
> +
> + # Change the working directory, then print the current working directory
> + # Tests:
> + # -environment-cd ${objdir}
> + # -environment-pwd
> +
> + mi_gdb_test "205-environment-cd ${objdir}" \
> + "\\\^done" \
> + "environment-cd arg operation"
> +
> + mi_gdb_test "206-environment-pwd" \
> + "\\\^done,cwd=\"${objdir}\"" \
> + "environment-pwd operation"
> +}
> +
> if [test_mi_interpreter_selection] {
> test_exec_and_symbol_mi_operatons
> test_breakpoints_deletion
> test_dir_specification
> + test_cwd_specification
> }
> > mi_gdb_exit

Index: defs.h
===================================================================
RCS file: /cvs/src/src/gdb/defs.h,v
retrieving revision 1.102
diff -u -r1.102 defs.h
--- defs.h	15 Oct 2002 02:16:51 -0000	1.102
+++ defs.h	10 Dec 2002 00:15:26 -0000
@@ -572,9 +572,15 @@
 
 extern void mod_path (char *, char **);
 
+extern void add_path (char *, char **, int);
+
 extern void directory_command (char *, int);
 
+extern char *source_path;
+
 extern void init_source_path (void);
+
+extern void init_last_source_visited (void);
 
 extern char *symtab_to_filename (struct symtab *);
 
Index: source.c
===================================================================
RCS file: /cvs/src/src/gdb/source.c,v
retrieving revision 1.36
diff -u -r1.36 source.c
--- source.c	24 Oct 2002 21:02:53 -0000	1.36
+++ source.c	10 Dec 2002 00:15:26 -0000
@@ -357,6 +357,12 @@
   forget_cached_source_info ();
 }
 
+void
+init_last_source_visited (void)
+{
+  last_source_visited = NULL;
+}
+
 /* Add zero or more directories to the front of the source path.  */
 
 void
@@ -387,6 +393,18 @@
 void
 mod_path (char *dirname, char **which_path)
 {
+  add_path (dirname, which_path, 1);
+}
+
+/* Workhorse of mod_path.  Takes an extra argument to determine
+   if dirname should be parsed for separators that indicate multiple
+   directories.  This allows for interfaces that pre-parse the dirname
+   and allow specification of traditional separator characters such
+   as space or tab. */
+
+void
+add_path (char *dirname, char **which_path, int parse_separators)
+{
   char *old = *which_path;
   int prefix = 0;
 
@@ -403,9 +421,16 @@
       struct stat st;
 
       {
-	char *separator = strchr (name, DIRNAME_SEPARATOR);
-	char *space = strchr (name, ' ');
-	char *tab = strchr (name, '\t');
+	char *separator = NULL;
+	char *space = NULL;
+	char *tab = NULL;
+
+	if (parse_separators)
+	  {
+	    separator = strchr (name, DIRNAME_SEPARATOR);
+	    space = strchr (name, ' ');
+	    tab = strchr (name, '\t');
+	  }
 
 	if (separator == 0 && space == 0 && tab == 0)
 	  p = dirname = name + strlen (name);
@@ -536,7 +561,8 @@
 	    tinybuf[0] = DIRNAME_SEPARATOR;
 	    tinybuf[1] = '\0';
 
-	    /* If we have already tacked on a name(s) in this command,                     be sure they stay on the front as we tack on some more.  */
+	    /* If we have already tacked on a name(s) in this command, be sure they stay 
+	       on the front as we tack on some more.  */
 	    if (prefix)
 	      {
 		char *temp, c;
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.290
diff -u -r1.290 Makefile.in
--- Makefile.in	5 Dec 2002 05:17:39 -0000	1.290
+++ Makefile.in	10 Dec 2002 00:15:26 -0000
@@ -168,12 +168,12 @@
 #
 SUBDIR_MI_OBS = \
 	mi-out.o mi-console.o \
-	mi-cmds.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o \
+	mi-cmds.o mi-cmd-env.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o \
 	mi-cmd-disas.o \
 	mi-main.o mi-parse.o mi-getopt.o
 SUBDIR_MI_SRCS = \
 	mi/mi-out.c mi/mi-console.c \
-	mi/mi-cmds.c \
+	mi/mi-cmds.c mi/mi-cmd-env.c \
 	mi/mi-cmd-var.c mi/mi-cmd-break.c mi/mi-cmd-stack.c \
 	mi/mi-cmd-disas.c \
 	mi/mi-main.c mi/mi-parse.c mi/mi-getopt.c
@@ -2526,6 +2526,10 @@
 mi-cmd-disas.o: $(srcdir)/mi/mi-cmd-disas.c $(defs_h) $(target_h) $(value_h) \
 	$(mi_cmds_h) $(mi_getopt_h) $(ui_out_h) $(gdb_string_h) $(disasm_h)
 	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-disas.c
+mi-cmd-env.o: $(srcdir)/mi/mi-cmd-env.c $(defs_h) $(mi_cmds_h) $(ui_out_h) \
+	$(mi_out_h) $(varobj_h) $(value_h) $(gdb_string_h) $(inferior.h) \
+	$(mi_getopt_h) $(environ_h) $(gdbcmd_h) $(top_h)
+	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-env.c
 mi-cmd-stack.o: $(srcdir)/mi/mi-cmd-stack.c $(defs_h) $(target_h) $(frame_h) \
 	$(value_h) $(mi_cmds_h) $(ui_out_h) $(symtab_h)
 	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-stack.c
Index: mi-cmd-env.c
===================================================================
RCS file: mi-cmd-env.c
diff -N mi-cmd-env.c
--- mi-cmd-env.c	1 Jan 1970 00:00:00 -0000
+++ mi-cmd-env.c	10 Dec 2002 00:16:45 -0000
@@ -0,0 +1,254 @@
+/* MI Command Set - environment commands.
+   Copyright 2002 Free Software Foundation, Inc.
+   Contributed by Red Hat Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <string.h>
+#include <sys/stat.h>
+
+#include "defs.h"
+#include "inferior.h"
+#include "value.h"
+#include "mi-out.h"
+#include "mi-cmds.h"
+#include "mi-getopt.h"
+#include "symtab.h"
+#include "target.h"
+#include "environ.h"
+#include "command.h"
+#include "ui-out.h"
+#include "top.h"
+
+static void env_cli_command (const char *cli, char *args);
+static void env_mod_path (char *dirname, char **which_path);
+extern void _initialize_mi_cmd_env (void);
+
+static const char path_var_name[] = "PATH";
+static char *orig_path = NULL;
+
+/* The following is copied from mi-main.c so for m1 and below we
+   can perform old behavior and use cli commands.  */
+static void
+env_execute_cli_command (const char *cli, char *args)
+{
+  if (cli != 0)
+    {
+      struct cleanup *old_cleanups;
+      char *run;
+      xasprintf (&run, cli, args);
+      old_cleanups = make_cleanup (xfree, run);
+      execute_command ( /*ui */ run, 0 /*from_tty */ );
+      do_cleanups (old_cleanups);
+      return;
+    }
+}
+
+
+/* Print working directory.  */
+enum mi_cmd_result
+mi_cmd_env_pwd (char *command, char **argv, int argc)
+{
+  if (argc > 0)
+    error ("mi_cmd_env_pwd: No arguments required");
+          
+  if (mi_version (uiout) < 2)
+    {
+      env_execute_cli_command ("pwd", NULL);
+      return MI_CMD_DONE;
+    }
+     
+  /* Otherwise the mi level is 2 or higher.  */
+
+  getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
+  ui_out_field_string (uiout, "cwd", gdb_dirbuf);
+
+  return MI_CMD_DONE;
+}
+
+/* Change working directory.  */
+enum mi_cmd_result
+mi_cmd_env_cd (char *command, char **argv, int argc)
+{
+  if (argc == 0 || argc > 1)
+    error ("mi_cmd_env_cd: Usage DIRECTORY");
+          
+  env_execute_cli_command ("cd %s", argv[0]);
+
+  return MI_CMD_DONE;
+}
+
+static void
+env_mod_path (char *dirname, char **which_path)
+{
+  if (dirname == 0 || dirname[0] == '\0')
+    return;
+
+  /* Call add_path with last arg 0 to indicate not to parse for 
+     separator characters.  */
+  add_path (dirname, which_path, 0);
+}
+
+/* Add one or more directories to start of executable search path.  */
+enum mi_cmd_result
+mi_cmd_env_path (char *command, char **argv, int argc)
+{
+  char *exec_path;
+  char *env;
+  int reset = 0;
+  int optind = 0;
+  int i;
+  char *optarg;
+  enum opt
+    {
+      RESET_OPT
+    };
+  static struct mi_opt opts[] =
+  {
+    {"r", RESET_OPT, 0},
+    0
+  };
+
+  dont_repeat ();
+
+  if (mi_version (uiout) < 2)
+    {
+      for (i = argc - 1; i >= 0; --i)
+	env_execute_cli_command ("path %s", argv[i]);
+      return MI_CMD_DONE;
+    }
+
+  /* Otherwise the mi level is 2 or higher.  */
+  while (1)
+    {
+      int opt = mi_getopt ("mi_cmd_env_path", argc, argv, opts,
+                           &optind, &optarg);
+      if (opt < 0)
+        break;
+      switch ((enum opt) opt)
+        {
+        case RESET_OPT:
+          reset = 1;
+          break;
+        }
+    }
+  argv += optind;
+  argc -= optind;
+
+
+  if (reset)
+    {
+      /* Reset implies resetting to original path first.  */
+      exec_path = xstrdup (orig_path);
+    }
+  else
+    {
+      /* Otherwise, get current path to modify.  */
+      env = get_in_environ (inferior_environ, path_var_name);
+
+      /* Can be null if path is not set.  */
+      if (!env)
+        env = "";
+      exec_path = xstrdup (env);
+    }
+
+  for (i = argc - 1; i >= 0; --i)
+    env_mod_path (argv[i], &exec_path);
+
+  set_in_environ (inferior_environ, path_var_name, exec_path);
+  xfree (exec_path);
+  env = get_in_environ (inferior_environ, path_var_name);
+  ui_out_field_string (uiout, "path", env);
+
+  return MI_CMD_DONE;
+}
+
+/* Add zero or more directories to the front of the source path.  */
+enum mi_cmd_result
+mi_cmd_env_dir (char *command, char **argv, int argc)
+{
+  int i;
+  int optind = 0;
+  int reset = 0;
+  char *optarg;
+  enum opt
+    {
+      RESET_OPT
+    };
+  static struct mi_opt opts[] =
+  {
+    {"r", RESET_OPT, 0},
+    0
+  };
+
+  dont_repeat ();
+
+  if (mi_version (uiout) < 2)
+    {
+      for (i = argc - 1; i >= 0; --i)
+	env_execute_cli_command ("dir %s", argv[i]);
+      return MI_CMD_DONE;
+    }
+
+  /* Otherwise mi level is 2 or higher.  */
+  while (1)
+    {
+      int opt = mi_getopt ("mi_cmd_env_dir", argc, argv, opts,
+                           &optind, &optarg);
+      if (opt < 0)
+        break;
+      switch ((enum opt) opt)
+        {
+        case RESET_OPT:
+          reset = 1;
+          break;
+        }
+    }
+  argv += optind;
+  argc -= optind;
+
+  if (reset)
+    {
+      /* Reset means setting to default path first.  */
+      xfree (source_path);
+      init_source_path ();
+    }
+
+  for (i = argc - 1; i >= 0; --i)
+    env_mod_path (argv[i], &source_path);
+  init_last_source_visited ();
+
+  ui_out_field_string (uiout, "source-path", source_path);
+  forget_cached_source_info ();
+
+  return MI_CMD_DONE;
+}
+
+void 
+_initialize_mi_cmd_env (void)
+{
+  char *env;
+
+  /* We want original execution path to reset to, if desired later.  */
+  env = get_in_environ (inferior_environ, path_var_name);
+
+  /* Can be null if path is not set.  */
+  if (!env)
+    env = "";
+  orig_path = xstrdup (env);
+}
Index: mi-cmds.h
===================================================================
RCS file: /cvs/src/src/gdb/mi/mi-cmds.h,v
retrieving revision 1.5
diff -u -r1.5 mi-cmds.h
--- mi-cmds.h	6 Mar 2001 08:21:45 -0000	1.5
+++ mi-cmds.h	10 Dec 2002 00:16:45 -0000
@@ -64,6 +64,10 @@
 extern mi_cmd_argv_ftype mi_cmd_data_read_memory;
 extern mi_cmd_argv_ftype mi_cmd_data_write_memory;
 extern mi_cmd_argv_ftype mi_cmd_data_write_register_values;
+extern mi_cmd_argv_ftype mi_cmd_env_cd;
+extern mi_cmd_argv_ftype mi_cmd_env_dir;
+extern mi_cmd_argv_ftype mi_cmd_env_path;
+extern mi_cmd_argv_ftype mi_cmd_env_pwd;
 extern mi_cmd_args_ftype mi_cmd_exec_continue;
 extern mi_cmd_args_ftype mi_cmd_exec_finish;
 extern mi_cmd_args_ftype mi_cmd_exec_next;
Index: mi-cmds.c
===================================================================
RCS file: /cvs/src/src/gdb/mi/mi-cmds.c,v
retrieving revision 1.8
diff -u -r1.8 mi-cmds.c
--- mi-cmds.c	6 Mar 2001 08:21:45 -0000	1.8
+++ mi-cmds.c	10 Dec 2002 00:16:45 -0000
@@ -56,10 +56,10 @@
   {"display-enable", 0, 0},
   {"display-insert", 0, 0},
   {"display-list", 0, 0},
-  {"environment-cd", "cd %s", 0},
-  {"environment-directory", "dir %s", 0},
-  {"environment-path", "path %s", 0},
-  {"environment-pwd", "pwd", 0},
+  {"environment-cd", 0, 0, mi_cmd_env_cd},
+  {"environment-directory", 0, 0, mi_cmd_env_dir},
+  {"environment-path", 0, 0, mi_cmd_env_path},
+  {"environment-pwd", 0, 0, mi_cmd_env_pwd},
   {"exec-abort", 0, 0},
   {"exec-arguments", "set args %s", 0},
   {"exec-continue", 0, mi_cmd_exec_continue},
Index: testsuite/gdb.mi/mi-basics.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.mi/mi-basics.exp,v
retrieving revision 1.6
diff -u -r1.6 mi-basics.exp
--- testsuite/gdb.mi/mi-basics.exp	27 Jun 2001 17:27:07 -0000	1.6
+++ testsuite/gdb.mi/mi-basics.exp	10 Dec 2002 00:18:48 -0000
@@ -148,26 +148,98 @@
     global srcdir
     global subdir
 
-    # Clear the search directories, then specify one to be searched
+    # Add to the search directories, display, then reset back to default
     # Tests:
-    # -environment-directory
     # -environment-directory arg
+    # -environment-directory 
+    # -environment-directory -r
 
 #exp_internal 1
-    mi_gdb_test "202-environment-directory" \
-             "\\\^done" \
+    mi_gdb_test "202-environment-directory ${srcdir}/${subdir}" \
+             "\\\^done,source-path=\"${srcdir}/${subdir}:\\\$cdir:\\\$cwd\"" \
+             "environment-directory arg operation"
+
+    mi_gdb_test "203-environment-directory" \
+             "\\\^done,source-path=\"${srcdir}/${subdir}:\\\$cdir:\\\$cwd\"" \
+             "environment-directory empty-string operation"
+
+    mi_gdb_test "204-environment-directory -r" \
+             "\\\^done,source-path=\"\\\$cdir:\\\$cwd\"" \
              "environment-directory operation"
 
-    mi_gdb_test "203-environment-directory ${srcdir}/${subdir}" \
-             "\\\^done" \
-             "environment-directory arg operation"
 #exp_internal 0
 }
 
+proc test_cwd_specification {} {
+    global mi_gdb_prompt
+    global objdir
+    global subdir
+
+    # Change the working directory, then print the current working directory
+    # Tests:
+    # -environment-cd ${objdir}
+    # -environment-pwd
+
+    mi_gdb_test "205-environment-cd ${objdir}" \
+             "\\\^done" \
+             "environment-cd arg operation"
+
+    mi_gdb_test "206-environment-pwd" \
+             "\\\^done,cwd=\"${objdir}\"" \
+             "environment-pwd operation"
+}
+
+proc test_path_specification {} {
+    global mi_gdb_prompt
+    global orig_path
+    global objdir
+    global srcdir
+
+    # Add to the path, display, then reset 
+    # Tests:
+    # -environment-path 
+    # -environment-path dir1 dir2
+    # -environment-path -r dir
+    # -environment-path -r
+
+#exp_internal 1
+
+    send_gdb "-environment-path\n"
+    gdb_expect 20 {
+	-re "\\\^done,path=\"\(.*\)\"\r\n$mi_gdb_prompt" { 
+	  set orig_path $expect_out(1,string); 
+	}
+	timeout { 
+	  perror "-environment-path (timeout)" ; 
+	  return 
+	}
+    }
+
+    mi_gdb_test "207-environment-path" \
+             "\\\^done,path=\"$orig_path\"" \
+             "environment-path no-args operation"
+
+    mi_gdb_test "208-environment-path $srcdir $objdir" \
+             "\\\^done,path=\"$srcdir:$objdir:$orig_path\"" \
+             "environment-path dir1 dir2 operation"
+
+    mi_gdb_test "209-environment-path -r $objdir" \
+             "\\\^done,path=\"$objdir:$orig_path\"" \
+             "environment-path -r dir operation"
+
+    mi_gdb_test "210-environment-path -r" \
+             "\\\^done,path=\"$orig_path\"" \
+             "environment-path -r operation"
+
+#exp_internal 0
+} 
+
 if [test_mi_interpreter_selection] {
   test_exec_and_symbol_mi_operatons
   test_breakpoints_deletion
   test_dir_specification
+  test_cwd_specification
+  test_path_specification
 }
 
 mi_gdb_exit
Index: gdbmi.texinfo
===================================================================
RCS file: /cvs/src/src/gdb/mi/gdbmi.texinfo,v
retrieving revision 1.30
diff -u -r1.30 gdbmi.texinfo
--- gdbmi.texinfo	11 Nov 2002 17:09:50 -0000	1.30
+++ gdbmi.texinfo	10 Dec 2002 00:12:25 -0000
@@ -1665,10 +1665,18 @@
 @subsubheading Synopsis
 
 @example
- -environment-directory @var{pathdir}
+ -environment-directory [ -r ] [ @var{pathdir} ]+
 @end example
 
-Add directory @var{pathdir} to beginning of search path for source files.
+Add directories @var{pathdir} to beginning of search path for source files.
+If the @samp{-r} option is used, the search path is reset to the default
+search path.  If directories @var{pathdir} are supplied in addition to the 
+@samp{-r} option, the search path is first reset and then addition
+occurs as normal.
+Specifying multiple directories in a single command
+results in the directories added to the beginning of the
+search path in the same order they were presented in the command.
+If no directories are specified, the current search path is displayed.
 
 @subsubheading @value{GDBN} Command
 
@@ -1679,7 +1687,16 @@
 @smallexample
 (@value{GDBP})
 -environment-directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb
-^done
+^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
+(@value{GDBP})
+-environment-directory ""
+^done,source-path="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb:$cdir:$cwd"
+(@value{GDBP})
+-environment-directory -r /home/jjohnstn/src/gdb
+^done,source-path="/home/jjohnstn/src/gdb:$cdir:$cwd"
+(@value{GDBP})
+-environment-directory -r
+^done,source-path="$cdir:$cwd"
 (@value{GDBP})
 @end smallexample
 
@@ -1690,10 +1707,19 @@
 @subsubheading Synopsis
 
 @example
- -environment-path ( @var{pathdir} )+
+ -environment-path [ -r ] [ @var{pathdir} ]+
 @end example
 
 Add directories @var{pathdir} to beginning of search path for object files.
+If the @samp{-r} option is used, the search path is reset to the original
+search path that existed at gdb start-up.  If directories @var{pathdir} are 
+supplied in addition to the 
+@samp{-r} option, the search path is first reset and then addition
+occurs as normal.
+Specifying multiple directories in a single command
+results in the directories added to the beginning of the
+search path in the same order they were presented in the command.
+If no directories are specified, the current path is displayed.
 
 @subsubheading @value{GDBN} Command
 
@@ -1703,8 +1729,14 @@
 
 @smallexample
 (@value{GDBP})
+-environment-path 
+^done,path="/usr/bin"
+(@value{GDBP})
 -environment-path /kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb
-^done
+^done,path="/kwikemart/marge/ezannoni/flathead-dev/ppc-eabi/gdb:/usr/bin"
+(@value{GDBP})
+-environment-path -r /usr/local/bin
+^done,path="/usr/local/bin:/usr/bin"
 (@value{GDBP})
 @end smallexample
 
@@ -1729,8 +1761,7 @@
 @smallexample
 (@value{GDBP})
 -environment-pwd
-~Working directory /kwikemart/marge/ezannoni/flathead-dev/devo/gdb.
-^done
+^done,cwd="/kwikemart/marge/ezannoni/flathead-dev/devo/gdb"
 (@value{GDBP})
 @end smallexample
 

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