From 1f56f817112df3e3644c4039c806e770620ca692 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Mon, 28 Nov 2011 21:50:54 +0100 Subject: add generic uncompress command Using the new uncompress function we can now implement a command which can uncompress all known compression types. This supplements the unlzo command. Signed-off-by: Sascha Hauer --- commands/uncompress.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 commands/uncompress.c (limited to 'commands/uncompress.c') diff --git a/commands/uncompress.c b/commands/uncompress.c new file mode 100644 index 0000000000..fff62275bb --- /dev/null +++ b/commands/uncompress.c @@ -0,0 +1,70 @@ +/* + * uncompress.c - uncompress a lzo compressed file + * + * Copyright (c) 2010 Sascha Hauer , Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * 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 +#include +#include +#include +#include +#include + +static int do_uncompress(struct command *cmdtp, int argc, char *argv[]) +{ + int from, to, ret; + + if (argc != 3) + return COMMAND_ERROR_USAGE; + + from = open(argv[1], O_RDONLY); + if (from < 0) { + perror("open"); + return 1; + } + + to = open(argv[2], O_WRONLY | O_CREAT); + if (to < 0) { + perror("open"); + ret = 1; + goto exit_close; + } + + ret = uncompress_fd_to_fd(from, to, uncompress_err_stdout); + + if (ret) + printf("failed to decompress\n"); + + close(to); +exit_close: + close(from); + return ret; +} + +static const __maybe_unused char cmd_uncompress_help[] = +"Usage: uncompress \n" +"Uncompress a compressed file\n"; + +BAREBOX_CMD_START(uncompress) + .cmd = do_uncompress, + .usage = "lzop ", + BAREBOX_CMD_HELP(cmd_uncompress_help) +BAREBOX_CMD_END + -- cgit v1.2.3