source: branches/samba-3.5.x/source4/libgpo/gpo_filesync.c

/*
 *  Unix SMB/CIFS implementation.
 *  Group Policy Object Support
 *
 *  Copyright (C) Guenther Deschner 2006
 *  Copyright (C) Wilco Baan Hofman 2008
 *
 *  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 "libcli/libcli.h"
#include "system/filesys.h"


struct sync_context {
        TALLOC_CTX *mem_ctx;
        struct smbcli_state *cli;
        char *remote_path;
        char *local_path;
        char *mask;
        uint16_t attribute;
};

static void gpo_sync_func(struct clilist_file_info *info,
                          const char *mask,
                          void *state);

NTSTATUS gpo_copy_file(TALLOC_CTX *mem_ctx,
                       struct smbcli_state *cli,
                       const char *nt_path,
                       const char *unix_path)
{
        NTSTATUS result;
        int fnum;
        int fd = 0;
        char *data = NULL;
        static int io_bufsize = 64512;
        int read_size = io_bufsize;
        off_t nread = 0;

        if ((fnum = smbcli_open(cli->tree, nt_path, O_RDONLY, DENY_NONE)) == -1) {
                result = NT_STATUS_NO_SUCH_FILE;
                goto out;
        }

        if ((fd = open(unix_path, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) {
                result = map_nt_error_from_unix(errno);
                goto out;
        }

        if ((data = talloc_size(mem_ctx, read_size)) == NULL) {
                result = NT_STATUS_NO_MEMORY;
                goto out;
        }

        while (1) {

                int n = smbcli_read(cli->tree, fnum, data, nread, read_size);

                if (n <= 0)
                        break;

                if (write(fd, data, n) != n) {
                        break;
                }

                nread += n;
        }

        result = NT_STATUS_OK;

 out:
        SAFE_FREE(data);
        if (fnum) {
                smbcli_close(cli->tree, fnum);
        }
        if (fd) {
                close(fd);
        }

        return result;
}

/****************************************************************
 copy dir
****************************************************************/

static NTSTATUS gpo_copy_dir(const char *nt_dir, const char *unix_path)
{
        if ((mkdir(unix_path, 0644)) < 0 && errno != EEXIST) {
                return NT_STATUS_ACCESS_DENIED;
        }

        return NT_STATUS_OK;
}

/****************************************************************
 sync files
****************************************************************/

static bool gpo_sync_files(struct sync_context *ctx)
{
        DEBUG(3,("calling cli_list with mask: %s\n", ctx->mask));

        if (smbcli_list(ctx->cli->tree,
                     ctx->mask,
                     ctx->attribute,
                     gpo_sync_func,
                     ctx) == -1) {
                DEBUG(1,("listing [%s] failed with error: %s\n",
                        ctx->mask, smbcli_errstr(ctx->cli->tree)));
                return false;
        }

        return true;
}

/****************************************************************
 syncronisation call back
****************************************************************/

static void gpo_sync_func(struct clilist_file_info *info,
                          const char *mask,
                          void *state)
{
        NTSTATUS result;
        struct sync_context *ctx;
        char *nt_filename, *unix_filename;
        char *nt_dir, *unix_dir;
        char *old_nt_dir, *old_unix_dir;

        ctx = (struct sync_context *)state;

        if (strequal(info->name, ".") || strequal(info->name, "..")) {
                return;
        }

        DEBUG(5,("gpo_sync_func: got mask: [%s], name: [%s]\n",
                mask, info->name));

        if (info->attrib & FILE_ATTRIBUTE_DIRECTORY) {

                DEBUG(3,("got dir: [%s]\n", info->name));

                nt_dir = talloc_asprintf(ctx->mem_ctx, "%s\\%s",
                                ctx->remote_path,
                                info->name);

                unix_dir = talloc_asprintf(ctx->mem_ctx, "%s/%s",
                                ctx->local_path,
                                info->name);

                result = gpo_copy_dir(nt_dir, unix_dir);
                if (!NT_STATUS_IS_OK(result)) {
                        DEBUG(1,("failed to copy dir: %s\n",
                                nt_errstr(result)));
                }

                old_nt_dir = ctx->remote_path;
                ctx->remote_path = talloc_strdup(ctx->mem_ctx, nt_dir);

                old_unix_dir = ctx->local_path;
                ctx->local_path = talloc_strdup(ctx->mem_ctx, unix_dir);

                ctx->mask = talloc_asprintf(ctx->mem_ctx,
                                        "%s\\*",
                                        nt_dir);
                if (!ctx->local_path || !ctx->mask || !ctx->remote_path) {
                        DEBUG(0,("gpo_sync_func: ENOMEM\n"));
                        return;
                }
                if (!gpo_sync_files(ctx)) {
                        DEBUG(0,("could not sync files\n"));
                }

                ctx->remote_path = old_nt_dir;
                ctx->local_path = old_unix_dir;
                return;
        }

        DEBUG(3,("got file: [%s]\n", info->name));

        nt_filename = talloc_asprintf(ctx->mem_ctx, "%s\\%s",
                        ctx->remote_path,
                        info->name);

        unix_filename = talloc_asprintf(ctx->mem_ctx, "%s/%s",
                        ctx->local_path,
                        info->name);

        result = gpo_copy_file(ctx->mem_ctx, ctx->cli,
                               nt_filename, unix_filename);
        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(1,("failed to copy file: %s\n",
                        nt_errstr(result)));
        }
}


/****************************************************************
 list a remote directory and download recursivly
****************************************************************/

NTSTATUS gpo_sync_directories(TALLOC_CTX *mem_ctx,
                              struct smbcli_state *cli,
                              const char *nt_path,
                              const char *local_path)
{
        struct sync_context ctx;

        ctx.mem_ctx     = mem_ctx;
        ctx.cli         = cli;
        ctx.remote_path = discard_const_p(char, nt_path);
        ctx.local_path  = discard_const_p(char, local_path);
        ctx.attribute   = (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_DIRECTORY);

        ctx.mask = talloc_asprintf(mem_ctx,
                                "%s\\*",
                                nt_path);
        if (!ctx.mask) {
                return NT_STATUS_NO_MEMORY;
        }

        if (!gpo_sync_files(&ctx)) {
                return NT_STATUS_NO_SUCH_FILE;
        }

        return NT_STATUS_OK;
}