diff options
Diffstat (limited to 'archival/libunarchive/decompress_bunzip2.c')
| -rw-r--r-- | archival/libunarchive/decompress_bunzip2.c | 74 |
1 files changed, 49 insertions, 25 deletions
diff --git a/archival/libunarchive/decompress_bunzip2.c b/archival/libunarchive/decompress_bunzip2.c index 2201568..549c8b1 100644 --- a/archival/libunarchive/decompress_bunzip2.c +++ b/archival/libunarchive/decompress_bunzip2.c @@ -44,7 +44,7 @@ #define RETVAL_LAST_BLOCK (-1) #define RETVAL_NOT_BZIP_DATA (-2) #define RETVAL_UNEXPECTED_INPUT_EOF (-3) -#define RETVAL_SHORT_WRITE (-4) +//#define RETVAL_SHORT_WRITE (-4) #define RETVAL_DATA_ERROR (-5) #define RETVAL_OUT_OF_MEMORY (-6) #define RETVAL_OBSOLETE_INPUT (-7) @@ -584,8 +584,8 @@ int FAST_FUNC read_bunzip(bunzip_data *bd, char *outbuf, int len) /* Because bunzip2 is used for help text unpacking, and because bb_show_usage() should work for NOFORK applets too, we must be extremely careful to not leak any allocations! */ -int FAST_FUNC start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, - int len) +int FAST_FUNC start_bunzip(bunzip_data **bdp, int in_fd, + const void *inbuf, int len) { bunzip_data *bd; unsigned i; @@ -606,9 +606,11 @@ int FAST_FUNC start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *in if (-1 == in_fd) { /* in this case, bd->inbuf is read-only */ bd->inbuf = (void*)inbuf; /* cast away const-ness */ - bd->inbufCount = len; - } else + } else { bd->inbuf = (unsigned char *)(bd + 1); + memcpy(bd->inbuf, inbuf, len); + } + bd->inbufCount = len; /* Init the CRC32 table (big endian) */ crc32_filltable(bd->crc32Table, 1); @@ -652,37 +654,59 @@ IF_DESKTOP(long long) int FAST_FUNC unpack_bz2_stream(int src_fd, int dst_fd) { IF_DESKTOP(long long total_written = 0;) + bunzip_data *bd; char *outbuf; - bunzip_data *bd; int i; + unsigned len; outbuf = xmalloc(IOBUF_SIZE); - i = start_bunzip(&bd, src_fd, NULL, 0); - if (!i) { - for (;;) { - i = read_bunzip(bd, outbuf, IOBUF_SIZE); - if (i <= 0) break; - if (i != full_write(dst_fd, outbuf, i)) { - i = RETVAL_SHORT_WRITE; - break; + len = 0; + while (1) { /* "Process one BZ... stream" loop */ + + i = start_bunzip(&bd, src_fd, outbuf + 2, len); + + if (i == 0) { + while (1) { /* "Produce some output bytes" loop */ + i = read_bunzip(bd, outbuf, IOBUF_SIZE); + if (i <= 0) + break; + if (i != full_write(dst_fd, outbuf, i)) { + bb_error_msg("short write"); + goto release_mem; + } + IF_DESKTOP(total_written += i;) } - IF_DESKTOP(total_written += i;) } - } - /* Check CRC and release memory */ - - if (i == RETVAL_LAST_BLOCK) { + if (i != RETVAL_LAST_BLOCK) { + bb_error_msg("bunzip error %d", i); + break; + } if (bd->headerCRC != bd->totalCRC) { bb_error_msg("CRC error"); - } else { - i = RETVAL_OK; + break; } - } else if (i == RETVAL_SHORT_WRITE) { - bb_error_msg("short write"); - } else { - bb_error_msg("bunzip error %d", i); + + /* Successfully unpacked one BZ stream */ + i = RETVAL_OK; + + /* Do we have "BZ..." after last processed byte? + * pbzip2 (parallelized bzip2) produces such files. + */ + len = bd->inbufCount - bd->inbufPos; + memcpy(outbuf, &bd->inbuf[bd->inbufPos], len); + if (len < 2) { + if (safe_read(src_fd, outbuf + len, 2 - len) != 2 - len) + break; + len = 2; + } + if (*(uint16_t*)outbuf != BZIP2_MAGIC) /* "BZ"? */ + break; + dealloc_bunzip(bd); + len -= 2; } + + release_mem: dealloc_bunzip(bd); free(outbuf); |