source: branches/2.2.9/mindi-busybox/archival/libarchive/get_header_tar_gz.c @ 2725

Last change on this file since 2725 was 2725, checked in by Bruno Cornec, 9 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
  • Property svn:eol-style set to native
File size: 981 bytes
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
4 */
5
6#include "libbb.h"
7#include "archive.h"
8
9char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle)
10{
11#if BB_MMU
12    unsigned char magic[2];
13#endif
14
15    /* Can't lseek over pipes */
16    archive_handle->seek = seek_by_read;
17
18    /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
19     * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
20     * need the header. */
21#if BB_MMU
22    xread(archive_handle->src_fd, &magic, 2);
23    /* Can skip this check, but error message will be less clear */
24    if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
25        bb_error_msg_and_die("invalid gzip magic");
26    }
27#endif
28
29    open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip");
30    archive_handle->offset = 0;
31    while (get_header_tar(archive_handle) == EXIT_SUCCESS)
32        continue;
33
34    /* Can only do one file at a time */
35    return EXIT_FAILURE;
36}
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