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rmp: add optional support for bz2 data. +50 bytes of code

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This commit is contained in:
Denis Vlasenko 2007-06-08 13:05:39 +00:00
parent def8260219
commit c14d39e83a
12 changed files with 42 additions and 24 deletions
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7
archival/Config.in
View File

@ -133,6 +133,13 @@ config RPM
help
Mini RPM applet - queries and extracts RPM packages.
config FEATURE_RPM_BZ2
bool "Enable handling of rpms with bzip2-compressed data inside"
default n
depends on RPM
help
Enable handling of rpms with bzip2-compressed data inside.
config TAR
bool "tar"
default n

6
archival/bbunzip.c
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@ -155,7 +155,7 @@ char* make_new_name_bunzip2(char *filename)
static
USE_DESKTOP(long long) int unpack_bunzip2(void)
{
return uncompressStream(STDIN_FILENO, STDOUT_FILENO);
return unpack_bz2_stream(STDIN_FILENO, STDOUT_FILENO);
}
int bunzip2_main(int argc, char **argv);
@ -242,7 +242,7 @@ USE_DESKTOP(long long) int unpack_gunzip(void)
status = uncompress(STDIN_FILENO, STDOUT_FILENO);
} else if (magic2 == 0x8b) {
check_header_gzip_or_die(STDIN_FILENO);
status = inflate_gunzip(STDIN_FILENO, STDOUT_FILENO);
status = unpack_gz_stream(STDIN_FILENO, STDOUT_FILENO);
} else {
goto bad_magic;
}
@ -292,7 +292,7 @@ char* make_new_name_unlzma(char *filename)
static
USE_DESKTOP(long long) int unpack_unlzma(void)
{
return unlzma(STDIN_FILENO, STDOUT_FILENO);
return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
}
int unlzma_main(int argc, char **argv);

4
archival/libunarchive/decompress_bunzip2.c
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@ -700,7 +700,7 @@ void dealloc_bunzip(bunzip_data *bd)
/* Decompress src_fd to dst_fd. Stops at end of bzip data, not end of file. */
USE_DESKTOP(long long) int
uncompressStream(int src_fd, int dst_fd)
unpack_bz2_stream(int src_fd, int dst_fd)
{
USE_DESKTOP(long long total_written = 0;)
char *outbuf;
@ -751,7 +751,7 @@ static char *const bunzip_errors[] = {
/* Dumb little test thing, decompress stdin to stdout */
int main(int argc, char **argv)
{
int i = uncompressStream(0, 1);
int i = unpack_bz2_stream(0, 1);
char c;
if (i < 0)

2
archival/libunarchive/decompress_unlzma.c
View File

@ -228,7 +228,7 @@ enum {
USE_DESKTOP(long long) int
unlzma(int src_fd, int dst_fd)
unpack_lzma_stream(int src_fd, int dst_fd)
{
USE_DESKTOP(long long total_written = 0;)
lzma_header_t header;

4
archival/libunarchive/decompress_unzip.c
View File

@ -981,7 +981,7 @@ static int inflate_get_next_window(STATE_PARAM_ONLY)
}
/* Called from inflate_gunzip() and inflate_unzip() */
/* Called from unpack_gz_stream() and inflate_unzip() */
/* NB: bytebuffer is allocated here but freeing it is left to the caller! */
static USE_DESKTOP(long long) int
inflate_unzip_internal(STATE_PARAM int in, int out)
@ -1056,7 +1056,7 @@ inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out)
USE_DESKTOP(long long) int
inflate_gunzip(int in, int out)
unpack_gz_stream(int in, int out)
{
uint32_t stored_crc = 0;
unsigned count;

2
archival/libunarchive/get_header_tar_bz2.c
View File

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

2
archival/libunarchive/get_header_tar_gz.c
View File

@ -20,7 +20,7 @@ char get_header_tar_gz(archive_handle_t *archive_handle)
check_header_gzip_or_die(archive_handle->src_fd);
archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;

2
archival/libunarchive/get_header_tar_lzma.c
View File

@ -14,7 +14,7 @@ char get_header_tar_lzma(archive_handle_t * archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
archive_handle->src_fd = open_transformer(archive_handle->src_fd, unlzma);
archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;

25
archival/rpm.c
View File

@ -187,10 +187,11 @@ int rpm_main(int argc, char **argv)
static void extract_cpio_gz(int fd)
{
USE_DESKTOP(long long) int (*xformer)(int src_fd, int dst_fd);
archive_handle_t *archive_handle;
unsigned char magic[2];
/* Initialise */
/* Initialize */
archive_handle = init_handle();
archive_handle->seek = seek_by_read;
//archive_handle->action_header = header_list;
@ -201,16 +202,26 @@ static void extract_cpio_gz(int fd)
archive_handle->offset = 0;
xread(archive_handle->src_fd, &magic, 2);
xformer = unpack_gz_stream;
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
bb_error_msg_and_die("invalid gzip magic");
}
check_header_gzip_or_die(archive_handle->src_fd);
xchdir("/"); /* Install RPM's to root */
if (ENABLE_FEATURE_RPM_BZ2
&& (magic[0] == 0x42) && (magic[1] == 0x5a)) {
xformer = unpack_bz2_stream;
/* We can do better, need modifying unpack_bz2_stream to not require
* first 2 bytes. Not very hard to do... I mean, TODO :) */
xlseek(archive_handle->src_fd, -2, SEEK_CUR);
} else
bb_error_msg_and_die("no gzip"
USE_FEATURE_RPM_BZ2("/bzip")
" magic");
} else
check_header_gzip_or_die(archive_handle->src_fd);
archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
xchdir("/"); /* Install RPM's to root */
archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer);
archive_handle->offset = 0;
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
/* loop */;
continue;
}

2
archival/rpm2cpio.c
View File

@ -80,7 +80,7 @@ int rpm2cpio_main(int argc, char **argv)
}
check_header_gzip_or_die(rpm_fd);
if (inflate_gunzip(rpm_fd, STDOUT_FILENO) < 0) {
if (unpack_gz_stream(rpm_fd, STDOUT_FILENO) < 0) {
bb_error_msg("error inflating");
}

2
docs/keep_data_small.txt
View File

@ -65,7 +65,7 @@ archival/libunarchive/decompress_unzip.c:
(see the rest of the file to get the idea)
This example completely eliminates globals in that module.
Required memory is allocated in inflate_gunzip() [its main module]
Required memory is allocated in unpack_gz_stream() [its main module]
and then passed down to all subroutines which need to access 'globals'
as a parameter.

8
include/unarchive.h
View File

@ -101,7 +101,6 @@ extern void data_align(archive_handle_t *archive_handle, const unsigned short bo
extern const llist_t *find_list_entry(const llist_t *list, const char *filename);
extern const llist_t *find_list_entry2(const llist_t *list, const char *filename);
extern USE_DESKTOP(long long) int uncompressStream(int src_fd, int dst_fd);
/* A bit of bunzip2 internals are exposed for compressed help support: */
typedef struct bunzip_data bunzip_data;
int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len);
@ -113,9 +112,10 @@ typedef struct inflate_unzip_result {
uint32_t crc;
} inflate_unzip_result;
extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out);
extern USE_DESKTOP(long long) int inflate_gunzip(int in, int out);
extern USE_DESKTOP(long long) int unlzma(int src_fd, int dst_fd);
extern USE_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd);
extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int src_fd, int dst_fd);
extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd);
extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd);
extern int open_transformer(int src_fd,
USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd));