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rmp: add optional support for bz2 data. +50 bytes of code
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@ -133,6 +133,13 @@ config RPM
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help
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Mini RPM applet - queries and extracts RPM packages.
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config FEATURE_RPM_BZ2
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bool "Enable handling of rpms with bzip2-compressed data inside"
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default n
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depends on RPM
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help
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Enable handling of rpms with bzip2-compressed data inside.
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config TAR
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bool "tar"
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default n
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@ -155,7 +155,7 @@ char* make_new_name_bunzip2(char *filename)
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static
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USE_DESKTOP(long long) int unpack_bunzip2(void)
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{
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return uncompressStream(STDIN_FILENO, STDOUT_FILENO);
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return unpack_bz2_stream(STDIN_FILENO, STDOUT_FILENO);
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}
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int bunzip2_main(int argc, char **argv);
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@ -242,7 +242,7 @@ USE_DESKTOP(long long) int unpack_gunzip(void)
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status = uncompress(STDIN_FILENO, STDOUT_FILENO);
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} else if (magic2 == 0x8b) {
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check_header_gzip_or_die(STDIN_FILENO);
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status = inflate_gunzip(STDIN_FILENO, STDOUT_FILENO);
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status = unpack_gz_stream(STDIN_FILENO, STDOUT_FILENO);
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} else {
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goto bad_magic;
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}
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@ -292,7 +292,7 @@ char* make_new_name_unlzma(char *filename)
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static
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USE_DESKTOP(long long) int unpack_unlzma(void)
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{
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return unlzma(STDIN_FILENO, STDOUT_FILENO);
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return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
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}
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int unlzma_main(int argc, char **argv);
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@ -700,7 +700,7 @@ void dealloc_bunzip(bunzip_data *bd)
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/* Decompress src_fd to dst_fd. Stops at end of bzip data, not end of file. */
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USE_DESKTOP(long long) int
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uncompressStream(int src_fd, int dst_fd)
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unpack_bz2_stream(int src_fd, int dst_fd)
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{
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USE_DESKTOP(long long total_written = 0;)
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char *outbuf;
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@ -751,7 +751,7 @@ static char *const bunzip_errors[] = {
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/* Dumb little test thing, decompress stdin to stdout */
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int main(int argc, char **argv)
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{
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int i = uncompressStream(0, 1);
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int i = unpack_bz2_stream(0, 1);
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char c;
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if (i < 0)
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@ -228,7 +228,7 @@ enum {
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USE_DESKTOP(long long) int
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unlzma(int src_fd, int dst_fd)
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unpack_lzma_stream(int src_fd, int dst_fd)
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{
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USE_DESKTOP(long long total_written = 0;)
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lzma_header_t header;
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@ -981,7 +981,7 @@ static int inflate_get_next_window(STATE_PARAM_ONLY)
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}
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/* Called from inflate_gunzip() and inflate_unzip() */
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/* Called from unpack_gz_stream() and inflate_unzip() */
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/* NB: bytebuffer is allocated here but freeing it is left to the caller! */
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static USE_DESKTOP(long long) int
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inflate_unzip_internal(STATE_PARAM int in, int out)
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@ -1056,7 +1056,7 @@ inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out)
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USE_DESKTOP(long long) int
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inflate_gunzip(int in, int out)
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unpack_gz_stream(int in, int out)
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{
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uint32_t stored_crc = 0;
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unsigned count;
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@ -11,7 +11,7 @@ char get_header_tar_bz2(archive_handle_t *archive_handle)
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/* Can't lseek over pipes */
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archive_handle->seek = seek_by_read;
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompressStream);
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream);
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archive_handle->offset = 0;
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while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
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@ -20,7 +20,7 @@ char get_header_tar_gz(archive_handle_t *archive_handle)
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check_header_gzip_or_die(archive_handle->src_fd);
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream);
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archive_handle->offset = 0;
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while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
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@ -14,7 +14,7 @@ char get_header_tar_lzma(archive_handle_t * archive_handle)
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/* Can't lseek over pipes */
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archive_handle->seek = seek_by_read;
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, unlzma);
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream);
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archive_handle->offset = 0;
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while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
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@ -187,10 +187,11 @@ int rpm_main(int argc, char **argv)
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static void extract_cpio_gz(int fd)
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{
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USE_DESKTOP(long long) int (*xformer)(int src_fd, int dst_fd);
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archive_handle_t *archive_handle;
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unsigned char magic[2];
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/* Initialise */
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/* Initialize */
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archive_handle = init_handle();
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archive_handle->seek = seek_by_read;
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//archive_handle->action_header = header_list;
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@ -201,16 +202,26 @@ static void extract_cpio_gz(int fd)
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archive_handle->offset = 0;
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xread(archive_handle->src_fd, &magic, 2);
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xformer = unpack_gz_stream;
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if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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bb_error_msg_and_die("invalid gzip magic");
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}
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check_header_gzip_or_die(archive_handle->src_fd);
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xchdir("/"); /* Install RPM's to root */
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if (ENABLE_FEATURE_RPM_BZ2
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&& (magic[0] == 0x42) && (magic[1] == 0x5a)) {
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xformer = unpack_bz2_stream;
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/* We can do better, need modifying unpack_bz2_stream to not require
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* first 2 bytes. Not very hard to do... I mean, TODO :) */
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xlseek(archive_handle->src_fd, -2, SEEK_CUR);
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} else
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bb_error_msg_and_die("no gzip"
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USE_FEATURE_RPM_BZ2("/bzip")
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" magic");
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} else
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check_header_gzip_or_die(archive_handle->src_fd);
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
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xchdir("/"); /* Install RPM's to root */
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer);
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archive_handle->offset = 0;
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while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
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/* loop */;
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continue;
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}
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@ -80,7 +80,7 @@ int rpm2cpio_main(int argc, char **argv)
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}
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check_header_gzip_or_die(rpm_fd);
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if (inflate_gunzip(rpm_fd, STDOUT_FILENO) < 0) {
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if (unpack_gz_stream(rpm_fd, STDOUT_FILENO) < 0) {
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bb_error_msg("error inflating");
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}
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@ -65,7 +65,7 @@ archival/libunarchive/decompress_unzip.c:
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(see the rest of the file to get the idea)
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This example completely eliminates globals in that module.
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Required memory is allocated in inflate_gunzip() [its main module]
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Required memory is allocated in unpack_gz_stream() [its main module]
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and then passed down to all subroutines which need to access 'globals'
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as a parameter.
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@ -101,7 +101,6 @@ extern void data_align(archive_handle_t *archive_handle, const unsigned short bo
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extern const llist_t *find_list_entry(const llist_t *list, const char *filename);
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extern const llist_t *find_list_entry2(const llist_t *list, const char *filename);
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extern USE_DESKTOP(long long) int uncompressStream(int src_fd, int dst_fd);
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/* A bit of bunzip2 internals are exposed for compressed help support: */
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typedef struct bunzip_data bunzip_data;
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int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len);
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@ -113,9 +112,10 @@ typedef struct inflate_unzip_result {
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uint32_t crc;
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} inflate_unzip_result;
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extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int in, int out);
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extern USE_DESKTOP(long long) int inflate_gunzip(int in, int out);
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extern USE_DESKTOP(long long) int unlzma(int src_fd, int dst_fd);
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extern USE_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd);
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extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int src_fd, int dst_fd);
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extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd);
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extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd);
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extern int open_transformer(int src_fd,
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USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd));
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