diff options
| -rw-r--r-- | archival/Config.in | 11 | ||||
| -rw-r--r-- | archival/ar.c | 10 | ||||
| -rw-r--r-- | archival/dpkg_deb.c | 29 | ||||
| -rw-r--r-- | archival/libunarchive/filter_accept_list_reassign.c | 20 | ||||
| -rw-r--r-- | archival/libunarchive/get_header_ar.c | 5 | ||||
| -rw-r--r-- | archival/libunarchive/get_header_tar.c | 27 | ||||
| -rw-r--r-- | archival/libunarchive/get_header_tar_gz.c | 1 | ||||
| -rw-r--r-- | archival/libunarchive/unpack_ar_archive.c | 3 | ||||
| -rw-r--r-- | include/unarchive.h | 4 |
9 files changed, 65 insertions, 45 deletions
diff --git a/archival/Config.in b/archival/Config.in index 4599b68..02daae1 100644 --- a/archival/Config.in +++ b/archival/Config.in @@ -90,10 +90,11 @@ config DPKG bool "dpkg" default n help - dpkg is a medium-level tool to install, build, remove and manage Debian packages. + dpkg is a medium-level tool to install, build, remove and manage + Debian packages. - This implementation of dpkg has a number of limitations, you should use the - official dpkg if possible. + This implementation of dpkg has a number of limitations, + you should use the official dpkg if possible. config DPKG_DEB bool "dpkg_deb" @@ -103,8 +104,8 @@ config DPKG_DEB This implementation of dpkg-deb cannot pack archives. - Unless you have a specific application which requires dpkg-deb, you should - probably say N here. + Unless you have a specific application which requires dpkg-deb, + say N here. config FEATURE_DPKG_DEB_EXTRACT_ONLY bool "Extract only (-x)" diff --git a/archival/ar.c b/archival/ar.c index d49329c..dbff677 100644 --- a/archival/ar.c +++ b/archival/ar.c @@ -45,7 +45,6 @@ int ar_main(int argc, char **argv) archive_handle_t *archive_handle; unsigned opt; - char magic[8]; archive_handle = init_handle(); @@ -82,14 +81,7 @@ int ar_main(int argc, char **argv) llist_add_to(&(archive_handle->accept), argv[optind++]); } - xread(archive_handle->src_fd, magic, 7); - if (strncmp(magic, "!<arch>", 7) != 0) { - bb_error_msg_and_die("invalid ar magic"); - } - archive_handle->offset += 7; - - while (get_header_ar(archive_handle) == EXIT_SUCCESS) - continue; + unpack_ar_archive(archive_handle); return EXIT_SUCCESS; } diff --git a/archival/dpkg_deb.c b/archival/dpkg_deb.c index cbacc91..9e6340f 100644 --- a/archival/dpkg_deb.c +++ b/archival/dpkg_deb.c @@ -20,8 +20,8 @@ int dpkg_deb_main(int argc, char **argv) archive_handle_t *tar_archive; llist_t *control_tar_llist = NULL; unsigned opt; - const char *extract_dir = NULL; - short argcount = 1; + const char *extract_dir; + int need_args; /* Setup the tar archive handle */ tar_archive = init_handle(); @@ -43,17 +43,21 @@ int dpkg_deb_main(int argc, char **argv) opt_complementary = "c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX"; opt = getopt32(argv, "cefXx"); + argv += optind; + argc -= optind; if (opt & DPKG_DEB_OPT_CONTENTS) { tar_archive->action_header = header_verbose_list; } + extract_dir = NULL; + need_args = 1; if (opt & DPKG_DEB_OPT_CONTROL) { ar_archive->accept = control_tar_llist; tar_archive->action_data = data_extract_all; - if (optind + 1 == argc) { + if (1 == argc) { extract_dir = "./DEBIAN"; } else { - argcount++; + need_args++; } } if (opt & DPKG_DEB_OPT_FIELD) { @@ -70,28 +74,31 @@ int dpkg_deb_main(int argc, char **argv) } if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) { tar_archive->action_data = data_extract_all; - argcount = 2; + need_args = 2; } - if ((optind + argcount) != argc) { + if (need_args != argc) { bb_show_usage(); } - tar_archive->src_fd = ar_archive->src_fd = xopen(argv[optind++], O_RDONLY); + tar_archive->src_fd = ar_archive->src_fd = xopen(argv[0], O_RDONLY); - /* Workout where to extract the files */ + /* Work out where to extract the files */ /* 2nd argument is a dir name */ - if (argv[optind]) { - extract_dir = argv[optind]; + if (argv[1]) { + extract_dir = argv[1]; } if (extract_dir) { mkdir(extract_dir, 0777); /* bb_make_directory(extract_dir, 0777, 0) */ xchdir(extract_dir); } + + /* Do it */ unpack_ar_archive(ar_archive); /* Cleanup */ - close(ar_archive->src_fd); + if (ENABLE_FEATURE_CLEAN_UP) + close(ar_archive->src_fd); return EXIT_SUCCESS; } diff --git a/archival/libunarchive/filter_accept_list_reassign.c b/archival/libunarchive/filter_accept_list_reassign.c index 4f2d4cd..4dbc2d1 100644 --- a/archival/libunarchive/filter_accept_list_reassign.c +++ b/archival/libunarchive/filter_accept_list_reassign.c @@ -8,6 +8,8 @@ #include "libbb.h" #include "unarchive.h" +/* Built and used only if ENABLE_DPKG || ENABLE_DPKG_DEB */ + /* * Reassign the subarchive metadata parser based on the filename extension * e.g. if its a .tar.gz modify archive_handle->sub_archive to process a .tar.gz @@ -19,23 +21,25 @@ char FAST_FUNC filter_accept_list_reassign(archive_handle_t *archive_handle) if (find_list_entry(archive_handle->accept, archive_handle->file_header->name)) { const char *name_ptr; - /* Extract the last 2 extensions */ + /* Find extension */ name_ptr = strrchr(archive_handle->file_header->name, '.'); /* Modify the subarchive handler based on the extension */ -#if ENABLE_FEATURE_DEB_TAR_GZ - if (strcmp(name_ptr, ".gz") == 0) { + if (ENABLE_FEATURE_DEB_TAR_GZ + && strcmp(name_ptr, ".gz") == 0 + ) { archive_handle->action_data_subarchive = get_header_tar_gz; return EXIT_SUCCESS; } -#endif -#if ENABLE_FEATURE_DEB_TAR_BZ2 - if (strcmp(name_ptr, ".bz2") == 0) { + if (ENABLE_FEATURE_DEB_TAR_BZ2 + && strcmp(name_ptr, ".bz2") == 0 + ) { archive_handle->action_data_subarchive = get_header_tar_bz2; return EXIT_SUCCESS; } -#endif - if (ENABLE_FEATURE_DEB_TAR_LZMA && !strcmp(name_ptr, ".lzma")) { + if (ENABLE_FEATURE_DEB_TAR_LZMA + && strcmp(name_ptr, ".lzma") == 0 + ) { archive_handle->action_data_subarchive = get_header_tar_lzma; return EXIT_SUCCESS; } diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c index 59fd34c..d476a9d 100644 --- a/archival/libunarchive/get_header_ar.c +++ b/archival/libunarchive/get_header_ar.c @@ -108,12 +108,13 @@ char FAST_FUNC get_header_ar(archive_handle_t *archive_handle) if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { archive_handle->action_header(typed); +#if ENABLE_DPKG || ENABLE_DPKG_DEB if (archive_handle->sub_archive) { while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS) continue; - } else { + } else +#endif archive_handle->action_data(archive_handle); - } } else { data_skip(archive_handle); } diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c index 69362f1..cf35d41 100644 --- a/archival/libunarchive/get_header_tar.c +++ b/archival/libunarchive/get_header_tar.c @@ -92,22 +92,32 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) again_after_align: #if ENABLE_DESKTOP + /* to prevent misdetection of bz2 sig */ + *(uint32_t*)(&tar) = 0; i = full_read(archive_handle->src_fd, &tar, 512); /* If GNU tar sees EOF in above read, it says: * "tar: A lone zero block at N", where N = kilobyte * where EOF was met (not EOF block, actual EOF!), - * and tar will exit with error code 0. + * and exits with EXIT_SUCCESS. * We will mimic exit(EXIT_SUCCESS), although we will not mimic * the message and we don't check whether we indeed * saw zero block directly before this. */ - if (i == 0) + if (i == 0) { xfunc_error_retval = 0; - if (i != 512) + short_read: bb_error_msg_and_die("short read"); + } + if (i != 512) { + if (ENABLE_FEATURE_TAR_AUTODETECT) + goto autodetect; + goto short_read; + } + #else - xread(archive_handle->src_fd, &tar, 512); + i = 512; + xread(archive_handle->src_fd, &tar, i); #endif - archive_handle->offset += 512; + archive_handle->offset += i; /* If there is no filename its an empty header */ if (tar.name[0] == 0 && tar.prefix[0] == 0) { @@ -133,6 +143,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) #if ENABLE_FEATURE_TAR_AUTODETECT char FAST_FUNC (*get_header_ptr)(archive_handle_t *); + USE_DESKTOP(autodetect:) /* tar gz/bz autodetect: check for gz/bz2 magic. * If we see the magic, and it is the very first block, * we can switch to get_header_tar_gz/bz2/lzma(). @@ -154,7 +165,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) /* Two different causes for lseek() != 0: * unseekable fd (would like to support that too, but...), * or not first block (false positive, it's not .gz/.bz2!) */ - if (lseek(archive_handle->src_fd, -512, SEEK_CUR) != 0) + if (lseek(archive_handle->src_fd, -i, SEEK_CUR) != 0) goto err; while (get_header_ptr(archive_handle) == EXIT_SUCCESS) continue; @@ -328,7 +339,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) p_linkname = NULL; } #endif - if (!strncmp(file_header->name, "/../"+1, 3) + if (strncmp(file_header->name, "/../"+1, 3) == 0 || strstr(file_header->name, "/../") ) { bb_error_msg_and_die("name with '..' encountered: '%s'", @@ -340,7 +351,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) cp = last_char_is(file_header->name, '/'); if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { - archive_handle->action_header(archive_handle->file_header); + archive_handle->action_header(/*archive_handle->*/ file_header); /* Note that we kill the '/' only after action_header() */ /* (like GNU tar 1.15.1: verbose mode outputs "dir/dir/") */ if (cp) *cp = '\0'; diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c index 086c6df..e88b720 100644 --- a/archival/libunarchive/get_header_tar_gz.c +++ b/archival/libunarchive/get_header_tar_gz.c @@ -20,6 +20,7 @@ char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle) * need the header. */ #if BB_MMU xread(archive_handle->src_fd, &magic, 2); + /* Can skip this check, but error message will be less clear */ if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) { bb_error_msg_and_die("invalid gzip magic"); } diff --git a/archival/libunarchive/unpack_ar_archive.c b/archival/libunarchive/unpack_ar_archive.c index 9c2f68b..dc2eec2 100644 --- a/archival/libunarchive/unpack_ar_archive.c +++ b/archival/libunarchive/unpack_ar_archive.c @@ -16,5 +16,6 @@ void FAST_FUNC unpack_ar_archive(archive_handle_t *ar_archive) } ar_archive->offset += 7; - while (get_header_ar(ar_archive) == EXIT_SUCCESS); + while (get_header_ar(ar_archive) == EXIT_SUCCESS) + continue; } diff --git a/include/unarchive.h b/include/unarchive.h index 0e380db..5b71d3e 100644 --- a/include/unarchive.h +++ b/include/unarchive.h @@ -47,11 +47,13 @@ typedef struct archive_handle_t { /* Process the data component, e.g. extract to filesystem */ void FAST_FUNC (*action_data)(struct archive_handle_t *); +#if ENABLE_DPKG || ENABLE_DPKG_DEB + /* "subarchive" is used only by dpkg[-deb] applets */ /* How to process any sub archive, e.g. get_header_tar_gz */ char FAST_FUNC (*action_data_subarchive)(struct archive_handle_t *); - /* Contains the handle to a sub archive */ struct archive_handle_t *sub_archive; +#endif /* The raw stream as read from disk or stdin */ int src_fd; |