From 08f9ffc3f7503eb3dc94f16c615b20d2ae9a059c Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 30 Jan 2015 15:15:38 +0100 Subject: [PATCH] dpkg: update supported compression methods Based on a patch by Ron Yorston 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 --- archival/dpkg.c | 11 ++++++++++ archival/dpkg_deb.c | 6 ++++++ archival/libarchive/Kbuild.src | 1 + .../libarchive/filter_accept_list_reassign.c | 10 +++++++++ archival/libarchive/get_header_tar_xz.c | 21 +++++++++++++++++++ include/bb_archive.h | 1 + 6 files changed, 50 insertions(+) create mode 100644 archival/libarchive/get_header_tar_xz.c diff --git a/archival/dpkg.c b/archival/dpkg.c index 2893cfc2d..151f0ca43 100644 --- a/archival/dpkg.c +++ b/archival/dpkg.c @@ -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; diff --git a/archival/dpkg_deb.c b/archival/dpkg_deb.c index 13f9db991..0285273fe 100644 --- a/archival/dpkg_deb.c +++ b/archival/dpkg_deb.c @@ -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"); diff --git a/archival/libarchive/Kbuild.src b/archival/libarchive/Kbuild.src index 968fdf8ab..7e89e9e89 100644 --- a/archival/libarchive/Kbuild.src +++ b/archival/libarchive/Kbuild.src @@ -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 diff --git a/archival/libarchive/filter_accept_list_reassign.c b/archival/libarchive/filter_accept_list_reassign.c index 3d19abe44..b9acfbc05 100644 --- a/archival/libarchive/filter_accept_list_reassign.c +++ b/archival/libarchive/filter_accept_list_reassign.c @@ -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; } diff --git a/archival/libarchive/get_header_tar_xz.c b/archival/libarchive/get_header_tar_xz.c new file mode 100644 index 000000000..7bf3b3b56 --- /dev/null +++ b/archival/libarchive/get_header_tar_xz.c @@ -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; +} diff --git a/include/bb_archive.h b/include/bb_archive.h index a6b166fe3..5d9e24c17 100644 --- a/include/bb_archive.h +++ b/include/bb_archive.h @@ -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; -- 2.25.1