diff options
Diffstat (limited to 'archival/libarchive')
| -rw-r--r-- | archival/libarchive/decompress_bunzip2.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/archival/libarchive/decompress_bunzip2.c b/archival/libarchive/decompress_bunzip2.c index 7ef4e03..6f2c49f 100644 --- a/archival/libarchive/decompress_bunzip2.c +++ b/archival/libarchive/decompress_bunzip2.c @@ -107,7 +107,7 @@ struct bunzip_data { uint8_t selectors[32768]; /* nSelectors=15 bits */ struct group_data groups[MAX_GROUPS]; /* Huffman coding tables */ }; -/* typedef struct bunzip_data bunzip_data; -- done in .h file */ +typedef struct bunzip_data bunzip_data; /* Return the next nnn bits of input. All reads from the compressed input @@ -575,7 +575,7 @@ static int get_next_block(bunzip_data *bd) in outbuf. IOW: on EOF returns len ("all bytes are not filled"), not 0. (Why? This allows to get rid of one local variable) */ -int FAST_FUNC read_bunzip(bunzip_data *bd, char *outbuf, int len) +static int FAST_FUNC read_bunzip(bunzip_data *bd, char *outbuf, int len) { const uint32_t *dbuf; int pos, current, previous; @@ -699,7 +699,7 @@ 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( +static int FAST_FUNC start_bunzip( void *jmpbuf, bunzip_data **bdp, int in_fd, @@ -759,7 +759,7 @@ int FAST_FUNC start_bunzip( return RETVAL_OK; } -void FAST_FUNC dealloc_bunzip(bunzip_data *bd) +static void FAST_FUNC dealloc_bunzip(bunzip_data *bd) { free(bd->dbuf); free(bd); @@ -847,6 +847,36 @@ unpack_bz2_stream(transformer_state_t *xstate) return i ? i : IF_DESKTOP(total_written) + 0; } +char* FAST_FUNC +unpack_bz2_data(const char *packed, int packed_len, int unpacked_len) +{ + char *outbuf = NULL; + bunzip_data *bd; + int i; + jmp_buf jmpbuf; + + /* Setup for I/O error handling via longjmp */ + i = setjmp(jmpbuf); + if (i == 0) { + i = start_bunzip(&jmpbuf, + &bd, + /* src_fd: */ -1, + /* inbuf: */ packed, + /* len: */ packed_len + ); + } + /* read_bunzip can longjmp and end up here with i != 0 + * on read data errors! Not trivial */ + if (i == 0) { + /* Cannot use xmalloc: will leak bd in NOFORK case! */ + outbuf = malloc_or_warn(unpacked_len); + if (outbuf) + read_bunzip(bd, outbuf, unpacked_len); + } + dealloc_bunzip(bd); + return outbuf; +} + #ifdef TESTING static char *const bunzip_errors[] = { |