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dpkg: update supported compression methods 

Based on a patch by Ron Yorston <rmy@tigress.co.uk>

function                                             old     new   delta
get_header_tar_xz                                      -      60     +60
filter_accept_list_reassign                          128     188     +60
unpack_package                                       585     621     +36
init_archive_deb_control                              52      76     +24
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/0 up/down: 180/0)             Total: 180 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2015-01-30 15:15:38 +01:00
parent 8c05a74f7e
commit 08f9ffc3f7
6 changed files with 50 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
archival/dpkg.c
View File

@ -1472,12 +1472,16 @@ static void init_archive_deb_control(archive_handle_t *ar_handle)
tar_handle->src_fd = ar_handle->src_fd;
/* We don't care about data.tar.* or debian-binary, just control.tar.* */
llist_add_to(&(ar_handle->accept), (char*)"control.tar");
#if ENABLE_FEATURE_SEAMLESS_GZ
llist_add_to(&(ar_handle->accept), (char*)"control.tar.gz");
#endif
#if ENABLE_FEATURE_SEAMLESS_BZ2
llist_add_to(&(ar_handle->accept), (char*)"control.tar.bz2");
#endif
#if ENABLE_FEATURE_SEAMLESS_XZ
llist_add_to(&(ar_handle->accept), (char*)"control.tar.xz");
#endif
/* Assign the tar handle as a subarchive of the ar handle */
ar_handle->dpkg__sub_archive = tar_handle;
@ -1492,12 +1496,19 @@ static void init_archive_deb_data(archive_handle_t *ar_handle)
tar_handle->src_fd = ar_handle->src_fd;
/* We don't care about control.tar.* or debian-binary, just data.tar.* */
llist_add_to(&(ar_handle->accept), (char*)"data.tar");
#if ENABLE_FEATURE_SEAMLESS_GZ
llist_add_to(&(ar_handle->accept), (char*)"data.tar.gz");
#endif
#if ENABLE_FEATURE_SEAMLESS_BZ2
llist_add_to(&(ar_handle->accept), (char*)"data.tar.bz2");
#endif
#if ENABLE_FEATURE_SEAMLESS_LZMA
llist_add_to(&(ar_handle->accept), (char*)"data.tar.lzma");
#endif
#if ENABLE_FEATURE_SEAMLESS_XZ
llist_add_to(&(ar_handle->accept), (char*)"data.tar.xz");
#endif
/* Assign the tar handle as a subarchive of the ar handle */
ar_handle->dpkg__sub_archive = tar_handle;

6
archival/dpkg_deb.c
View File

@ -70,6 +70,8 @@ int dpkg_deb_main(int argc, char **argv)
ar_archive->dpkg__sub_archive = tar_archive;
ar_archive->filter = filter_accept_list_reassign;
llist_add_to(&ar_archive->accept, (char*)"data.tar");
llist_add_to(&control_tar_llist, (char*)"control.tar");
#if ENABLE_FEATURE_SEAMLESS_GZ
llist_add_to(&ar_archive->accept, (char*)"data.tar.gz");
llist_add_to(&control_tar_llist, (char*)"control.tar.gz");
@ -82,6 +84,10 @@ int dpkg_deb_main(int argc, char **argv)
llist_add_to(&ar_archive->accept, (char*)"data.tar.lzma");
llist_add_to(&control_tar_llist, (char*)"control.tar.lzma");
#endif
#if ENABLE_FEATURE_SEAMLESS_XZ
llist_add_to(&ar_archive->accept, (char*)"data.tar.xz");
llist_add_to(&control_tar_llist, (char*)"control.tar.xz");
#endif
opt_complementary = "c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
opt = getopt32(argv, "cefXx");

1
archival/libarchive/Kbuild.src
View File

@ -35,6 +35,7 @@ DPKG_FILES:= \
get_header_tar_gz.o \
get_header_tar_bz2.o \
get_header_tar_lzma.o \
get_header_tar_xz.o \
INSERT

10
archival/libarchive/filter_accept_list_reassign.c
View File

@ -28,6 +28,10 @@ char FAST_FUNC filter_accept_list_reassign(archive_handle_t *archive_handle)
name_ptr++;
/* Modify the subarchive handler based on the extension */
if (strcmp(name_ptr, "tar") == 0) {
archive_handle->dpkg__action_data_subarchive = get_header_tar;
return EXIT_SUCCESS;
}
if (ENABLE_FEATURE_SEAMLESS_GZ
&& strcmp(name_ptr, "gz") == 0
) {
@ -46,6 +50,12 @@ char FAST_FUNC filter_accept_list_reassign(archive_handle_t *archive_handle)
archive_handle->dpkg__action_data_subarchive = get_header_tar_lzma;
return EXIT_SUCCESS;
}
if (ENABLE_FEATURE_SEAMLESS_XZ
&& strcmp(name_ptr, "xz") == 0
) {
archive_handle->dpkg__action_data_subarchive = get_header_tar_xz;
return EXIT_SUCCESS;
}
}
return EXIT_FAILURE;
}

21
archival/libarchive/get_header_tar_xz.c Normal file
View File

@ -0,0 +1,21 @@
/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
#include "bb_archive.h"
char FAST_FUNC get_header_tar_xz(archive_handle_t *archive_handle)
{
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
fork_transformer_with_sig(archive_handle->src_fd, unpack_xz_stream, "unxz");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
/* Can only do one file at a time */
return EXIT_FAILURE;
}

1
include/bb_archive.h
View File

@ -184,6 +184,7 @@ char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
char get_header_tar_xz(archive_handle_t *archive_handle) FAST_FUNC;
void seek_by_jump(int fd, off_t amount) FAST_FUNC;
void seek_by_read(int fd, off_t amount) FAST_FUNC;