source: branches/samba-3.5.x/source4/lib/registry/tools/regdiff.c

/*
   Unix SMB/CIFS implementation.
   simple registry frontend

   Copyright (C) Jelmer Vernooij 2004-2007
   Copyright (C) Wilco Baan Hofman 2006

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "lib/registry/registry.h"
#include "lib/events/events.h"
#include "lib/cmdline/popt_common.h"
#include "lib/registry/tools/common.h"
#include "param/param.h"

enum reg_backend { REG_UNKNOWN, REG_LOCAL, REG_REMOTE, REG_NULL };

static struct registry_context *open_backend(poptContext pc,
                                             struct tevent_context *ev_ctx,
                                             struct loadparm_context *lp_ctx,
                                             enum reg_backend backend,
                                             const char *remote_host)
{
        WERROR error;
        struct registry_context *ctx;

        switch (backend) {
        case REG_UNKNOWN:
                poptPrintUsage(pc, stderr, 0);
                return NULL;
        case REG_LOCAL:
                error = reg_open_samba(NULL, &ctx, ev_ctx, lp_ctx, NULL, cmdline_credentials);
                break;
        case REG_REMOTE:
                error = reg_open_remote(&ctx, NULL, cmdline_credentials, lp_ctx,
                                        remote_host, ev_ctx);
                break;
        case REG_NULL:
                error = reg_open_local(NULL, &ctx);
                break;
        }

        if (!W_ERROR_IS_OK(error)) {
                fprintf(stderr, "Error: %s\n", win_errstr(error));
                return NULL;
        }

        return ctx;
}

int main(int argc, const char **argv)
{
        int opt;
        poptContext pc;
        char *outputfile = NULL;
        enum reg_backend backend1 = REG_UNKNOWN, backend2 = REG_UNKNOWN;
        const char *remote1 = NULL, *remote2 = NULL;
        struct registry_context *h1 = NULL, *h2 = NULL;
        WERROR error;
        struct poptOption long_options[] = {
                POPT_AUTOHELP
                {"output", 'o', POPT_ARG_STRING, &outputfile, 0, "output file to use", NULL },
                {"null", 'n', POPT_ARG_NONE, NULL, 'n', "Diff from NULL", NULL },
                {"remote", 'R', POPT_ARG_STRING, NULL, 'R', "Connect to remote server" , NULL },
                {"local", 'L', POPT_ARG_NONE, NULL, 'L', "Open local registry", NULL },
                POPT_COMMON_SAMBA
                POPT_COMMON_CREDENTIALS
                POPT_COMMON_VERSION
                { NULL }
        };
        TALLOC_CTX *ctx;
        void *callback_data;
        struct tevent_context *ev_ctx;
        struct reg_diff_callbacks *callbacks;

        ctx = talloc_init("regdiff");

        pc = poptGetContext(argv[0], argc, argv, long_options,0);

        while((opt = poptGetNextOpt(pc)) != -1) {
                error = WERR_OK;
                switch(opt)     {
                case 'L':
                        if (backend1 == REG_UNKNOWN)
                                backend1 = REG_LOCAL;
                        else if (backend2 == REG_UNKNOWN)
                                backend2 = REG_LOCAL;
                        break;
                case 'n':
                        if (backend1 == REG_UNKNOWN)
                                backend1 = REG_NULL;
                        else if (backend2 == REG_UNKNOWN)
                                backend2 = REG_NULL;
                        break;
                case 'R':
                        if (backend1 == REG_UNKNOWN) {
                                backend1 = REG_REMOTE;
                                remote1 = poptGetOptArg(pc);
                        } else if (backend2 == REG_UNKNOWN) {
                                backend2 = REG_REMOTE;
                                remote2 = poptGetOptArg(pc);
                        }
                        break;
                }

        }

        ev_ctx = s4_event_context_init(NULL);

        h1 = open_backend(pc, ev_ctx, cmdline_lp_ctx, backend1, remote1);
        if (h1 == NULL)
                return 1;

        h2 = open_backend(pc, ev_ctx, cmdline_lp_ctx, backend2, remote2);
        if (h2 == NULL)
                return 1;

        poptFreeContext(pc);

        error = reg_dotreg_diff_save(ctx, outputfile, lp_iconv_convenience(cmdline_lp_ctx), &callbacks,
                                     &callback_data);
        if (!W_ERROR_IS_OK(error)) {
                fprintf(stderr, "Problem saving registry diff to '%s': %s\n",
                        outputfile, win_errstr(error));
                return -1;
        }

        error = reg_generate_diff(h1, h2, callbacks, callback_data);
        if (!W_ERROR_IS_OK(error)) {
                fprintf(stderr, "Unable to generate diff between keys: %s\n",
                        win_errstr(error));
                return -1;
        }

        return 0;
}