Contents of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/get_header_tar_gz.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 991 byte(s)
-updated to busybox-1.13.4
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
4 | */ |
5 | |
6 | #include "libbb.h" |
7 | #include "unarchive.h" |
8 | |
9 | char 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 | } |