135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* dpkg-deb packs, unpacks and provides information about Debian archives.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config DPKG_DEB
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//config: bool "dpkg_deb"
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//config: default y
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//config: select FEATURE_SEAMLESS_GZ
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//config: help
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//config: dpkg-deb unpacks and provides information about Debian archives.
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//config:
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//config: This implementation of dpkg-deb cannot pack archives.
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//config:
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//config: Unless you have a specific application which requires dpkg-deb,
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//config: say N here.
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//applet:IF_DPKG_DEB(APPLET_ODDNAME(dpkg-deb, dpkg_deb, BB_DIR_USR_BIN, BB_SUID_DROP, dpkg_deb))
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//kbuild:lib-$(CONFIG_DPKG_DEB) += dpkg_deb.o
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//usage:#define dpkg_deb_trivial_usage
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//usage: "[-cefxX] FILE [DIR]"
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//usage:#define dpkg_deb_full_usage "\n\n"
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//usage: "Perform actions on Debian packages (.deb)\n"
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//usage: "\n -c List files"
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//usage: "\n -f Print control fields"
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//usage: "\n -e Extract control files to DIR (default: ./DEBIAN)"
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//usage: "\n -x Extract files to DIR (no default)"
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//usage: "\n -X Verbose -x"
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//usage:
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//usage:#define dpkg_deb_example_usage
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//usage: "$ dpkg-deb -X ./busybox_0.48-1_i386.deb /tmp\n"
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#include "libbb.h"
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#include "bb_archive.h"
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#define DPKG_DEB_OPT_CONTENTS 1
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#define DPKG_DEB_OPT_CONTROL 2
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#define DPKG_DEB_OPT_FIELD 4
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#define DPKG_DEB_OPT_EXTRACT_VERBOSE 8
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#define DPKG_DEB_OPT_EXTRACT 16
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int dpkg_deb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int dpkg_deb_main(int argc UNUSED_PARAM, char **argv)
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{
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archive_handle_t *ar_archive;
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archive_handle_t *tar_archive;
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llist_t *control_tar_llist = NULL;
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unsigned opt;
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const char *extract_dir;
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/* Setup the tar archive handle */
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tar_archive = init_handle();
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/* Setup an ar archive handle that refers to the gzip sub archive */
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ar_archive = init_handle();
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ar_archive->dpkg__sub_archive = tar_archive;
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ar_archive->filter = filter_accept_list_reassign;
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llist_add_to(&ar_archive->accept, (char*)"data.tar");
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llist_add_to(&control_tar_llist, (char*)"control.tar");
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#if ENABLE_FEATURE_SEAMLESS_GZ
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llist_add_to(&ar_archive->accept, (char*)"data.tar.gz");
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llist_add_to(&control_tar_llist, (char*)"control.tar.gz");
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#endif
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#if ENABLE_FEATURE_SEAMLESS_BZ2
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llist_add_to(&ar_archive->accept, (char*)"data.tar.bz2");
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llist_add_to(&control_tar_llist, (char*)"control.tar.bz2");
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#endif
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#if ENABLE_FEATURE_SEAMLESS_LZMA
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llist_add_to(&ar_archive->accept, (char*)"data.tar.lzma");
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llist_add_to(&control_tar_llist, (char*)"control.tar.lzma");
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#endif
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#if ENABLE_FEATURE_SEAMLESS_XZ
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llist_add_to(&ar_archive->accept, (char*)"data.tar.xz");
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llist_add_to(&control_tar_llist, (char*)"control.tar.xz");
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#endif
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/* Must have 1 or 2 args */
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opt_complementary = "-1:?2:c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
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opt = getopt32(argv, "cefXx");
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argv += optind;
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//argc -= optind;
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extract_dir = argv[1];
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if (opt & DPKG_DEB_OPT_CONTENTS) { // -c
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tar_archive->action_header = header_verbose_list;
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if (extract_dir)
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bb_show_usage();
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}
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if (opt & DPKG_DEB_OPT_FIELD) { // -f
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/* Print the entire control file */
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//TODO: standard tool accepts an optional list of fields to print
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ar_archive->accept = control_tar_llist;
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llist_add_to(&(tar_archive->accept), (char*)"./control");
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tar_archive->filter = filter_accept_list;
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tar_archive->action_data = data_extract_to_stdout;
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if (extract_dir)
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bb_show_usage();
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}
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if (opt & DPKG_DEB_OPT_CONTROL) { // -e
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ar_archive->accept = control_tar_llist;
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tar_archive->action_data = data_extract_all;
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if (!extract_dir)
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extract_dir = "./DEBIAN";
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}
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if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) { // -Xx
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if (opt & DPKG_DEB_OPT_EXTRACT_VERBOSE)
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tar_archive->action_header = header_list;
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tar_archive->action_data = data_extract_all;
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if (!extract_dir)
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bb_show_usage();
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}
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/* Standard tool supports "-" */
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tar_archive->src_fd = ar_archive->src_fd = xopen_stdin(argv[0]);
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if (extract_dir) {
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mkdir(extract_dir, 0777); /* bb_make_directory(extract_dir, 0777, 0) */
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xchdir(extract_dir);
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}
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/* Do it */
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unpack_ar_archive(ar_archive);
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/* Cleanup */
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if (ENABLE_FEATURE_CLEAN_UP)
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close(ar_archive->src_fd);
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return EXIT_SUCCESS;
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}
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