busybox/archival/libunarchive/get_header_tar_gz.c

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/* vi: set sw=4 ts=4: */
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/*
* 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 Library 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 <stdlib.h>
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#include "libbb.h"
#include "unarchive.h"
char get_header_tar_gz(archive_handle_t *archive_handle)
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{
unsigned char magic[2];
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/* Cant lseek over pipe's */
archive_handle->seek = seek_by_char;
archive_xread_all(archive_handle, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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bb_error_msg_and_die("Invalid gzip magic");
}
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check_header_gzip(archive_handle->src_fd);
archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
archive_handle->offset = 0;
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while (get_header_tar(archive_handle) == EXIT_SUCCESS);
/* Can only do one file at a time */
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return(EXIT_FAILURE);
}