commands/unlzo.c

   1 /*
   2  * unlzo.c - uncompress a lzo compressed file
   3  *
   4  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2
  11  * as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <common.h>
  24 #include <command.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <fs.h>
  28 #include <lzo.h>
  29
  30 static int do_unlzo(struct command *cmdtp, int argc, char *argv[])
  31 {
  32         int from, to, ret, retlen;
  33
  34         if (argc != 3)
  35                 return COMMAND_ERROR_USAGE;
  36
  37         from = open(argv[1], O_RDONLY);
  38         if (from < 0) {
  39                 perror("open");
  40                 return 1;
  41         }
  42
  43         to = open(argv[2], O_WRONLY | O_CREAT);
  44         if (to < 0) {
  45                 perror("open");
  46                 ret = 1;
  47                 goto exit_close;
  48         }
  49
  50         ret = unlzo(from, to, &retlen);
  51         if (ret)
  52                 printf("failed to decompress\n");
  53
  54         close(to);
  55 exit_close:
  56         close(from);
  57         return ret;
  58 }
  59
  60 static const __maybe_unused char cmd_unlzo_help[] =
  61 "Usage: unlzo <infile> <outfile>\n"
  62 "Uncompress a lzo compressed file\n";
  63
  64 BAREBOX_CMD_START(unlzo)
  65         .cmd            = do_unlzo,
  66         .usage          = "lzop <infile> <outfile>",
  67         BAREBOX_CMD_HELP(cmd_unlzo_help)
  68 BAREBOX_CMD_END
  69