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*: refactor handling of archived files. "tar f file.tar.lzma" now works too.

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function                                             old     new   delta
unpack_Z_stream                                        -    1229   +1229
open_zipped                                            -     176    +176
unpack_bz2_stream_prime                                -      60     +60
tar_main                                             642     677     +35
find_main                                            406     418     +12
sv_main                                             1222    1233     +11
decode_format_string                                 829     837      +8
cmp_main                                             641     649      +8
popstring                                            134     140      +6
filter_accept_list_reassign                          120     125      +5
parse_and_put_prompt                                 800     804      +4
passwd_main                                         1053    1049      -4
make_new_name_gunzip                                 119     114      -5
rpm_main                                            1688    1670     -18
prepare                                              302     283     -19
xmalloc_open_zipped_read_close                       135      61     -74
uncompress                                          1229       -   -1229
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 8/5 up/down: 1554/-1349)        Total: 205 bytes
This commit is contained in:
Denis Vlasenko
2008-08-05 13:10:34 +00:00
parent 9b44613202
commit e9ad84dfd4
21 changed files with 325 additions and 320 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
archival/libunarchive/Kbuild
View File

@@ -32,36 +32,20 @@ DPKG_FILES:= \
get_header_tar.o \
filter_accept_list_reassign.o
lib-$(CONFIG_RPM) += open_transformer.o
lib-$(CONFIG_FEATURE_TAR_BZIP2) += open_transformer.o
lib-$(CONFIG_FEATURE_TAR_LZMA) += open_transformer.o
lib-$(CONFIG_FEATURE_TAR_GZIP) += open_transformer.o
lib-$(CONFIG_FEATURE_TAR_COMPRESS) += open_transformer.o
lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += open_transformer.o
lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += open_transformer.o
lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += open_transformer.o
lib-$(CONFIG_FEATURE_MODPROBE_SMALL_ZIPPED) += open_transformer.o decompress_unzip.o decompress_bunzip2.o
lib-$(CONFIG_AR) += get_header_ar.o unpack_ar_archive.o
lib-$(CONFIG_BUNZIP2) += decompress_bunzip2.o
lib-$(CONFIG_UNLZMA) += decompress_unlzma.o
lib-$(CONFIG_CPIO) += get_header_cpio.o
lib-$(CONFIG_DPKG) += $(DPKG_FILES)
lib-$(CONFIG_DPKG_DEB) += $(DPKG_FILES)
lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += decompress_unzip.o get_header_tar_gz.o
lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += decompress_bunzip2.o get_header_tar_bz2.o
lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
lib-$(CONFIG_GUNZIP) += decompress_unzip.o
lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o
lib-$(CONFIG_RPM2CPIO) += decompress_unzip.o get_header_cpio.o
lib-$(CONFIG_RPM) += decompress_unzip.o get_header_cpio.o
lib-$(CONFIG_FEATURE_RPM_BZ2) += decompress_bunzip2.o
lib-$(CONFIG_RPM) += open_transformer.o decompress_unzip.o get_header_cpio.o
lib-$(CONFIG_TAR) += get_header_tar.o
lib-$(CONFIG_FEATURE_TAR_BZIP2) += decompress_bunzip2.o get_header_tar_bz2.o
lib-$(CONFIG_FEATURE_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o
lib-$(CONFIG_FEATURE_TAR_GZIP) += decompress_unzip.o get_header_tar_gz.o
lib-$(CONFIG_FEATURE_TAR_COMPRESS) += decompress_uncompress.o
lib-$(CONFIG_UNCOMPRESS) += decompress_uncompress.o
lib-$(CONFIG_UNZIP) += decompress_unzip.o
lib-$(CONFIG_FEATURE_SEAMLESS_Z) += open_transformer.o decompress_uncompress.o
lib-$(CONFIG_FEATURE_SEAMLESS_GZ) += open_transformer.o decompress_unzip.o get_header_tar_gz.o
lib-$(CONFIG_FEATURE_SEAMLESS_BZ2) += open_transformer.o decompress_bunzip2.o get_header_tar_bz2.o
lib-$(CONFIG_FEATURE_SEAMLESS_LZMA) += open_transformer.o decompress_unlzma.o get_header_tar_lzma.o
lib-$(CONFIG_FEATURE_COMPRESS_USAGE) += decompress_bunzip2.o

29
archival/libunarchive/decompress_bunzip2.c
View File

@@ -590,7 +590,8 @@ int FAST_FUNC start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *in
bunzip_data *bd;
unsigned i;
enum {
BZh0 = ('B' << 24) + ('Z' << 16) + ('h' << 8) + '0'
BZh0 = ('B' << 24) + ('Z' << 16) + ('h' << 8) + '0',
h0 = ('h' << 8) + '0',
};
/* Figure out how much data to allocate */
@@ -617,12 +618,18 @@ int FAST_FUNC start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *in
if (i) return i;
/* Ensure that file starts with "BZh['1'-'9']." */
i = get_bits(bd, 32);
if ((unsigned)(i - BZh0 - 1) >= 9) return RETVAL_NOT_BZIP_DATA;
/* Update: now caller verifies 1st two bytes, makes .gz/.bz2
* integration easier */
/* was: */
/* i = get_bits(bd, 32); */
/* if ((unsigned)(i - BZh0 - 1) >= 9) return RETVAL_NOT_BZIP_DATA; */
i = get_bits(bd, 16);
if ((unsigned)(i - h0 - 1) >= 9) return RETVAL_NOT_BZIP_DATA;
/* Fourth byte (ascii '1'-'9') indicates block size in units of 100k of
uncompressed data. Allocate intermediate buffer for block. */
bd->dbufSize = 100000 * (i - BZh0);
/* bd->dbufSize = 100000 * (i - BZh0); */
bd->dbufSize = 100000 * (i - h0);
/* Cannot use xmalloc - may leak bd in NOFORK case! */
bd->dbuf = malloc_or_warn(bd->dbufSize * sizeof(int));
@@ -682,6 +689,17 @@ unpack_bz2_stream(int src_fd, int dst_fd)
return i ? i : USE_DESKTOP(total_written) + 0;
}
USE_DESKTOP(long long) int FAST_FUNC
unpack_bz2_stream_prime(int src_fd, int dst_fd)
{
unsigned char magic[2];
xread(src_fd, magic, 2);
if (magic[0] != 'B' || magic[1] != 'Z') {
bb_error_msg_and_die("invalid magic");
}
return unpack_bz2_stream(src_fd, dst_fd);
}
#ifdef TESTING
static char *const bunzip_errors[] = {
@@ -693,9 +711,10 @@ static char *const bunzip_errors[] = {
/* Dumb little test thing, decompress stdin to stdout */
int main(int argc, char **argv)
{
int i = unpack_bz2_stream(0, 1);
int i;
char c;
int i = unpack_bz2_stream_prime(0, 1);
if (i < 0)
fprintf(stderr, "%s\n", bunzip_errors[-i]);
else if (read(STDIN_FILENO, &c, 1))

8
archival/libunarchive/decompress_uncompress.c
View File

@@ -1,6 +1,4 @@
/* vi: set sw=4 ts=4: */
#include "libbb.h"
/* uncompress for busybox -- (c) 2002 Robert Griebl
*
* based on the original compress42.c source
@@ -26,6 +24,10 @@
*
*/
#include "libbb.h"
#include "unarchive.h"
/* Default input buffer size */
#define IBUFSIZ 2048
@@ -71,7 +73,7 @@
*/
USE_DESKTOP(long long) int FAST_FUNC
uncompress(int fd_in, int fd_out)
unpack_Z_stream(int fd_in, int fd_out)
{
USE_DESKTOP(long long total_written = 0;)
USE_DESKTOP(long long) int retval = -1;

15
archival/libunarchive/filter_accept_list_reassign.c
View File

@@ -23,22 +23,25 @@ char FAST_FUNC filter_accept_list_reassign(archive_handle_t *archive_handle)
/* Find extension */
name_ptr = strrchr(archive_handle->file_header->name, '.');
if (!name_ptr)
return EXIT_FAILURE;
name_ptr++;
/* Modify the subarchive handler based on the extension */
if (ENABLE_FEATURE_DEB_TAR_GZ
&& strcmp(name_ptr, ".gz") == 0
if (ENABLE_FEATURE_SEAMLESS_GZ
&& strcmp(name_ptr, "gz") == 0
) {
archive_handle->action_data_subarchive = get_header_tar_gz;
return EXIT_SUCCESS;
}
if (ENABLE_FEATURE_DEB_TAR_BZ2
&& strcmp(name_ptr, ".bz2") == 0
if (ENABLE_FEATURE_SEAMLESS_BZ2
&& strcmp(name_ptr, "bz2") == 0
) {
archive_handle->action_data_subarchive = get_header_tar_bz2;
return EXIT_SUCCESS;
}
if (ENABLE_FEATURE_DEB_TAR_LZMA
&& strcmp(name_ptr, ".lzma") == 0
if (ENABLE_FEATURE_SEAMLESS_LZMA
&& strcmp(name_ptr, "lzma") == 0
) {
archive_handle->action_data_subarchive = get_header_tar_lzma;
return EXIT_SUCCESS;

4
archival/libunarchive/get_header_tar.c
View File

@@ -148,12 +148,12 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
* we can switch to get_header_tar_gz/bz2/lzma().
* Needs seekable fd. I wish recv(MSG_PEEK) works
* on any fd... */
#if ENABLE_FEATURE_TAR_GZIP
#if ENABLE_FEATURE_SEAMLESS_GZ
if (tar.name[0] == 0x1f && tar.name[1] == (char)0x8b) { /* gzip */
get_header_ptr = get_header_tar_gz;
} else
#endif
#if ENABLE_FEATURE_TAR_BZIP2
#if ENABLE_FEATURE_SEAMLESS_BZ2
if (tar.name[0] == 'B' && tar.name[1] == 'Z'
&& tar.name[2] == 'h' && isdigit(tar.name[3])
) { /* bzip2 */

2
archival/libunarchive/get_header_tar_bz2.c
View File

@@ -11,7 +11,7 @@ char FAST_FUNC get_header_tar_bz2(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
open_transformer(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
open_transformer(archive_handle->src_fd, unpack_bz2_stream_prime, "bunzip2");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;