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-rw-r--r--archival/libarchive/decompress_bunzip2.c11
-rw-r--r--archival/libarchive/decompress_gunzip.c30
-rw-r--r--archival/libarchive/decompress_uncompress.c12
-rw-r--r--archival/libarchive/decompress_unlzma.c12
-rw-r--r--archival/libarchive/decompress_unxz.c6
-rw-r--r--archival/libarchive/get_header_tar_bz2.c2
-rw-r--r--archival/libarchive/get_header_tar_gz.c2
-rw-r--r--archival/libarchive/get_header_tar_lzma.c2
-rw-r--r--archival/libarchive/open_transformer.c199
9 files changed, 199 insertions, 77 deletions
diff --git a/archival/libarchive/decompress_bunzip2.c b/archival/libarchive/decompress_bunzip2.c
index 36237e2..fe5953d 100644
--- a/archival/libarchive/decompress_bunzip2.c
+++ b/archival/libarchive/decompress_bunzip2.c
@@ -731,7 +731,7 @@ void FAST_FUNC dealloc_bunzip(bunzip_data *bd)
/* Decompress src_fd to dst_fd. Stops at end of bzip data, not end of file. */
IF_DESKTOP(long long) int FAST_FUNC
-unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
+unpack_bz2_stream(transformer_state_t *xstate)
{
IF_DESKTOP(long long total_written = 0;)
bunzip_data *bd;
@@ -739,14 +739,14 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
int i;
unsigned len;
- if (check_signature16(xstate, src_fd, BZIP2_MAGIC))
+ if (check_signature16(xstate, BZIP2_MAGIC))
return -1;
outbuf = xmalloc(IOBUF_SIZE);
len = 0;
while (1) { /* "Process one BZ... stream" loop */
- i = start_bunzip(&bd, src_fd, outbuf + 2, len);
+ i = start_bunzip(&bd, xstate->src_fd, outbuf + 2, len);
if (i == 0) {
while (1) { /* "Produce some output bytes" loop */
@@ -756,8 +756,7 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
i = IOBUF_SIZE - i; /* number of bytes produced */
if (i == 0) /* EOF? */
break;
- if (i != full_write(dst_fd, outbuf, i)) {
- bb_error_msg("short write");
+ if (i != transformer_write(xstate, outbuf, i)) {
i = RETVAL_SHORT_WRITE;
goto release_mem;
}
@@ -790,7 +789,7 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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)
+ if (safe_read(xstate->src_fd, outbuf + len, 2 - len) != 2 - len)
break;
len = 2;
}
diff --git a/archival/libarchive/decompress_gunzip.c b/archival/libarchive/decompress_gunzip.c
index 62a3d78..1360abe 100644
--- a/archival/libarchive/decompress_gunzip.c
+++ b/archival/libarchive/decompress_gunzip.c
@@ -971,7 +971,7 @@ static int inflate_get_next_window(STATE_PARAM_ONLY)
/* Called from unpack_gz_stream() and inflate_unzip() */
static IF_DESKTOP(long long) int
-inflate_unzip_internal(STATE_PARAM int in, int out)
+inflate_unzip_internal(STATE_PARAM transformer_state_t *xstate)
{
IF_DESKTOP(long long) int n = 0;
ssize_t nwrote;
@@ -980,7 +980,7 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
gunzip_window = xmalloc(GUNZIP_WSIZE);
gunzip_outbuf_count = 0;
gunzip_bytes_out = 0;
- gunzip_src_fd = in;
+ gunzip_src_fd = xstate->src_fd;
/* (re) initialize state */
method = -1;
@@ -1002,9 +1002,8 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
while (1) {
int r = inflate_get_next_window(PASS_STATE_ONLY);
- nwrote = full_write(out, gunzip_window, gunzip_outbuf_count);
- if (nwrote != (ssize_t)gunzip_outbuf_count) {
- bb_perror_msg("write");
+ nwrote = transformer_write(xstate, gunzip_window, gunzip_outbuf_count);
+ if (nwrote == (ssize_t)-1) {
n = -1;
goto ret;
}
@@ -1034,7 +1033,7 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
/* For unzip */
IF_DESKTOP(long long) int FAST_FUNC
-inflate_unzip(transformer_state_t *xstate, int in, int out)
+inflate_unzip(transformer_state_t *xstate)
{
IF_DESKTOP(long long) int n;
DECLARE_STATE;
@@ -1045,7 +1044,7 @@ inflate_unzip(transformer_state_t *xstate, int in, int out)
// bytebuffer_max = 0x8000;
bytebuffer_offset = 4;
bytebuffer = xmalloc(bytebuffer_max);
- n = inflate_unzip_internal(PASS_STATE in, out);
+ n = inflate_unzip_internal(PASS_STATE xstate);
free(bytebuffer);
xstate->crc32 = gunzip_crc;
@@ -1169,8 +1168,7 @@ static int check_header_gzip(STATE_PARAM transformer_state_t *xstate)
}
}
- if (xstate)
- xstate->mtime = SWAP_LE32(header.formatted.mtime);
+ xstate->mtime = SWAP_LE32(header.formatted.mtime);
/* Read the header checksum */
if (header.formatted.flags & 0x02) {
@@ -1182,27 +1180,27 @@ static int check_header_gzip(STATE_PARAM transformer_state_t *xstate)
}
IF_DESKTOP(long long) int FAST_FUNC
-unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
+unpack_gz_stream(transformer_state_t *xstate)
{
uint32_t v32;
IF_DESKTOP(long long) int total, n;
DECLARE_STATE;
#if !ENABLE_FEATURE_SEAMLESS_Z
- if (check_signature16(xstate, src_fd, GZIP_MAGIC))
+ if (check_signature16(xstate, GZIP_MAGIC))
return -1;
#else
- if (xstate && xstate->check_signature) {
+ if (xstate->check_signature) {
uint16_t magic2;
- if (full_read(src_fd, &magic2, 2) != 2) {
+ if (full_read(xstate->src_fd, &magic2, 2) != 2) {
bad_magic:
bb_error_msg("invalid magic");
return -1;
}
if (magic2 == COMPRESS_MAGIC) {
xstate->check_signature = 0;
- return unpack_Z_stream(xstate, src_fd, dst_fd);
+ return unpack_Z_stream(xstate);
}
if (magic2 != GZIP_MAGIC)
goto bad_magic;
@@ -1215,7 +1213,7 @@ unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
to_read = -1;
// bytebuffer_max = 0x8000;
bytebuffer = xmalloc(bytebuffer_max);
- gunzip_src_fd = src_fd;
+ gunzip_src_fd = xstate->src_fd;
again:
if (!check_header_gzip(PASS_STATE xstate)) {
@@ -1224,7 +1222,7 @@ unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
goto ret;
}
- n = inflate_unzip_internal(PASS_STATE src_fd, dst_fd);
+ n = inflate_unzip_internal(PASS_STATE xstate);
if (n < 0) {
total = -1;
goto ret;
diff --git a/archival/libarchive/decompress_uncompress.c b/archival/libarchive/decompress_uncompress.c
index cb3d55a..496d864 100644
--- a/archival/libarchive/decompress_uncompress.c
+++ b/archival/libarchive/decompress_uncompress.c
@@ -73,7 +73,7 @@
*/
IF_DESKTOP(long long) int FAST_FUNC
-unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
+unpack_Z_stream(transformer_state_t *xstate)
{
IF_DESKTOP(long long total_written = 0;)
IF_DESKTOP(long long) int retval = -1;
@@ -102,7 +102,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
/* block compress mode -C compatible with 2.0 */
int block_mode; /* = BLOCK_MODE; */
- if (check_signature16(xstate, src_fd, COMPRESS_MAGIC))
+ if (check_signature16(xstate, COMPRESS_MAGIC))
return -1;
inbuf = xzalloc(IBUFSIZ + 64);
@@ -114,7 +114,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
/* xread isn't good here, we have to return - caller may want
* to do some cleanup (e.g. delete incomplete unpacked file etc) */
- if (full_read(src_fd, inbuf, 1) != 1) {
+ if (full_read(xstate->src_fd, inbuf, 1) != 1) {
bb_error_msg("short read");
goto err;
}
@@ -166,7 +166,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
}
if (insize < (int) (IBUFSIZ + 64) - IBUFSIZ) {
- rsize = safe_read(src_fd, inbuf + insize, IBUFSIZ);
+ rsize = safe_read(xstate->src_fd, inbuf + insize, IBUFSIZ);
if (rsize < 0)
bb_error_msg_and_die(bb_msg_read_error);
insize += rsize;
@@ -274,7 +274,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
}
if (outpos >= OBUFSIZ) {
- xwrite(dst_fd, outbuf, outpos);
+ xtransformer_write(xstate, outbuf, outpos);
IF_DESKTOP(total_written += outpos;)
outpos = 0;
}
@@ -301,7 +301,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
} while (rsize > 0);
if (outpos > 0) {
- xwrite(dst_fd, outbuf, outpos);
+ xtransformer_write(xstate, outbuf, outpos);
IF_DESKTOP(total_written += outpos;)
}
diff --git a/archival/libarchive/decompress_unlzma.c b/archival/libarchive/decompress_unlzma.c
index ccedac4..c8622f9 100644
--- a/archival/libarchive/decompress_unlzma.c
+++ b/archival/libarchive/decompress_unlzma.c
@@ -206,7 +206,7 @@ enum {
IF_DESKTOP(long long) int FAST_FUNC
-unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst_fd)
+unpack_lzma_stream(transformer_state_t *xstate)
{
IF_DESKTOP(long long total_written = 0;)
lzma_header_t header;
@@ -223,7 +223,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
int state = 0;
uint32_t rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
- if (full_read(src_fd, &header, sizeof(header)) != sizeof(header)
+ if (full_read(xstate->src_fd, &header, sizeof(header)) != sizeof(header)
|| header.pos >= (9 * 5 * 5)
) {
bb_error_msg("bad lzma header");
@@ -258,7 +258,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
}
- rc = rc_init(src_fd); /*, RC_BUFFER_SIZE); */
+ rc = rc_init(xstate->src_fd); /*, RC_BUFFER_SIZE); */
while (global_pos + buffer_pos < header.dst_size) {
int pos_state = (buffer_pos + global_pos) & pos_state_mask;
@@ -306,7 +306,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
if (buffer_pos == header.dict_size) {
buffer_pos = 0;
global_pos += header.dict_size;
- if (full_write(dst_fd, buffer, header.dict_size) != (ssize_t)header.dict_size)
+ if (transformer_write(xstate, buffer, header.dict_size) != (ssize_t)header.dict_size)
goto bad;
IF_DESKTOP(total_written += header.dict_size;)
}
@@ -440,7 +440,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
if (buffer_pos == header.dict_size) {
buffer_pos = 0;
global_pos += header.dict_size;
- if (full_write(dst_fd, buffer, header.dict_size) != (ssize_t)header.dict_size)
+ if (transformer_write(xstate, buffer, header.dict_size) != (ssize_t)header.dict_size)
goto bad;
IF_DESKTOP(total_written += header.dict_size;)
}
@@ -455,7 +455,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
{
IF_NOT_DESKTOP(int total_written = 0; /* success */)
IF_DESKTOP(total_written += buffer_pos;)
- if (full_write(dst_fd, buffer, buffer_pos) != (ssize_t)buffer_pos) {
+ if (transformer_write(xstate, buffer, buffer_pos) != (ssize_t)buffer_pos) {
bad:
total_written = -1; /* failure */
}
diff --git a/archival/libarchive/decompress_unxz.c b/archival/libarchive/decompress_unxz.c
index 6df54e1..1f408ab 100644
--- a/archival/libarchive/decompress_unxz.c
+++ b/archival/libarchive/decompress_unxz.c
@@ -38,7 +38,7 @@ static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
#include "unxz/xz_dec_stream.c"
IF_DESKTOP(long long) int FAST_FUNC
-unpack_xz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
+unpack_xz_stream(transformer_state_t *xstate)
{
enum xz_ret xz_result;
struct xz_buf iobuf;
@@ -67,7 +67,7 @@ unpack_xz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
xz_result = X_OK;
while (1) {
if (iobuf.in_pos == iobuf.in_size) {
- int rd = safe_read(src_fd, membuf, BUFSIZ);
+ int rd = safe_read(xstate->src_fd, membuf, BUFSIZ);
if (rd < 0) {
bb_error_msg(bb_msg_read_error);
total = -1;
@@ -104,7 +104,7 @@ unpack_xz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
// bb_error_msg("<in pos:%d size:%d out pos:%d size:%d r:%d",
// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, xz_result);
if (iobuf.out_pos) {
- xwrite(dst_fd, iobuf.out, iobuf.out_pos);
+ xtransformer_write(xstate, iobuf.out, iobuf.out_pos);
IF_DESKTOP(total += iobuf.out_pos;)
iobuf.out_pos = 0;
}
diff --git a/archival/libarchive/get_header_tar_bz2.c b/archival/libarchive/get_header_tar_bz2.c
index 0ee00df..78f78a8 100644
--- a/archival/libarchive/get_header_tar_bz2.c
+++ b/archival/libarchive/get_header_tar_bz2.c
@@ -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_with_sig(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
+ fork_transformer_with_sig(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/get_header_tar_gz.c b/archival/libarchive/get_header_tar_gz.c
index 0328434..b11f503 100644
--- a/archival/libarchive/get_header_tar_gz.c
+++ b/archival/libarchive/get_header_tar_gz.c
@@ -11,7 +11,7 @@ char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer_with_sig(archive_handle->src_fd, unpack_gz_stream, "gunzip");
+ fork_transformer_with_sig(archive_handle->src_fd, unpack_gz_stream, "gunzip");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/get_header_tar_lzma.c b/archival/libarchive/get_header_tar_lzma.c
index d565a21..d228cbc 100644
--- a/archival/libarchive/get_header_tar_lzma.c
+++ b/archival/libarchive/get_header_tar_lzma.c
@@ -14,7 +14,7 @@ char FAST_FUNC get_header_tar_lzma(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer_with_sig(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
+ fork_transformer_with_sig(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/open_transformer.c b/archival/libarchive/open_transformer.c
index 584b15d..9d762a8 100644
--- a/archival/libarchive/open_transformer.c
+++ b/archival/libarchive/open_transformer.c
@@ -11,11 +11,11 @@ void FAST_FUNC init_transformer_state(transformer_state_t *xstate)
memset(xstate, 0, sizeof(*xstate));
}
-int FAST_FUNC check_signature16(transformer_state_t *xstate, int src_fd, unsigned magic16)
+int FAST_FUNC check_signature16(transformer_state_t *xstate, unsigned magic16)
{
- if (xstate && xstate->check_signature) {
+ if (xstate->check_signature) {
uint16_t magic2;
- if (full_read(src_fd, &magic2, 2) != 2 || magic2 != magic16) {
+ if (full_read(xstate->src_fd, &magic2, 2) != 2 || magic2 != magic16) {
bb_error_msg("invalid magic");
#if 0 /* possible future extension */
if (xstate->check_signature > 1)
@@ -27,6 +27,46 @@ int FAST_FUNC check_signature16(transformer_state_t *xstate, int src_fd, unsigne
return 0;
}
+ssize_t FAST_FUNC transformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize)
+{
+ ssize_t nwrote;
+
+ if (xstate->mem_output_size_max != 0) {
+ size_t pos = xstate->mem_output_size;
+ size_t size;
+
+ size = (xstate->mem_output_size += bufsize);
+ if (size > xstate->mem_output_size_max) {
+ free(xstate->mem_output_buf);
+ xstate->mem_output_buf = NULL;
+ bb_perror_msg("buffer %u too small", (unsigned)xstate->mem_output_size_max);
+ nwrote = -1;
+ goto ret;
+ }
+ xstate->mem_output_buf = xrealloc(xstate->mem_output_buf, size);
+ memcpy(xstate->mem_output_buf + pos, buf, bufsize);
+ nwrote = bufsize;
+ } else {
+ nwrote = full_write(xstate->dst_fd, buf, bufsize);
+ if (nwrote != (ssize_t)bufsize) {
+ bb_perror_msg("write");
+ nwrote = -1;
+ goto ret;
+ }
+ }
+ ret:
+ return nwrote;
+}
+
+ssize_t FAST_FUNC xtransformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize)
+{
+ ssize_t nwrote = transformer_write(xstate, buf, bufsize);
+ if (nwrote != (ssize_t)bufsize) {
+ xfunc_die();
+ }
+ return nwrote;
+}
+
void check_errors_in_children(int signo)
{
int status;
@@ -60,12 +100,12 @@ void check_errors_in_children(int signo)
/* transformer(), more than meets the eye */
#if BB_MMU
-void FAST_FUNC open_transformer(int fd,
+void FAST_FUNC fork_transformer(int fd,
int check_signature,
- IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_state_t *xstate, int src_fd, int dst_fd)
+ IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_state_t *xstate)
)
#else
-void FAST_FUNC open_transformer(int fd, const char *transform_prog)
+void FAST_FUNC fork_transformer(int fd, const char *transform_prog)
#endif
{
struct fd_pair fd_pipe;
@@ -83,7 +123,9 @@ void FAST_FUNC open_transformer(int fd, const char *transform_prog)
transformer_state_t xstate;
init_transformer_state(&xstate);
xstate.check_signature = check_signature;
- r = transformer(&xstate, fd, fd_pipe.wr);
+ xstate.src_fd = fd;
+ xstate.dst_fd = fd_pipe.wr;
+ r = transformer(&xstate);
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd_pipe.wr); /* send EOF */
close(fd);
@@ -118,16 +160,19 @@ void FAST_FUNC open_transformer(int fd, const char *transform_prog)
/* Used by e.g. rpm which gives us a fd without filename,
* thus we can't guess the format from filename's extension.
*/
-int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
+static transformer_state_t *setup_transformer_on_fd(int fd, int fail_if_not_compressed)
{
union {
uint8_t b[4];
uint16_t b16[2];
uint32_t b32[1];
} magic;
- int offset = -2;
- USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate, int src_fd, int dst_fd);)
- USE_FOR_NOMMU(const char *xformer_prog;)
+ int offset;
+ transformer_state_t *xstate;
+
+ offset = -2;
+ xstate = xzalloc(sizeof(*xstate));
+ xstate->src_fd = fd;
/* .gz and .bz2 both have 2-byte signature, and their
* unpack_XXX_stream wants this header skipped. */
@@ -135,15 +180,15 @@ int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
if (ENABLE_FEATURE_SEAMLESS_GZ
&& magic.b16[0] == GZIP_MAGIC
) {
- USE_FOR_MMU(xformer = unpack_gz_stream;)
- USE_FOR_NOMMU(xformer_prog = "gunzip";)
+ xstate->xformer = unpack_gz_stream;
+ USE_FOR_NOMMU(xstate->xformer_prog = "gunzip";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_BZ2
&& magic.b16[0] == BZIP2_MAGIC
) {
- USE_FOR_MMU(xformer = unpack_bz2_stream;)
- USE_FOR_NOMMU(xformer_prog = "bunzip2";)
+ xstate->xformer = unpack_bz2_stream;
+ USE_FOR_NOMMU(xstate->xformer_prog = "bunzip2";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_XZ
@@ -152,8 +197,8 @@ int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
offset = -6;
xread(fd, magic.b32, sizeof(magic.b32[0]));
if (magic.b32[0] == XZ_MAGIC2) {
- USE_FOR_MMU(xformer = unpack_xz_stream;)
- USE_FOR_NOMMU(xformer_prog = "unxz";)
+ xstate->xformer = unpack_xz_stream;
+ USE_FOR_NOMMU(xstate->xformer_prog = "unxz";)
goto found_magic;
}
}
@@ -164,52 +209,130 @@ int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
IF_FEATURE_SEAMLESS_BZ2("/bzip2")
IF_FEATURE_SEAMLESS_XZ("/xz")
" magic");
+
+ /* Some callers expect this function to "consume" fd
+ * even if data is not compressed. In this case,
+ * we return a state with trivial transformer.
+ */
+// USE_FOR_MMU(xstate->xformer = copy_stream;)
+// USE_FOR_NOMMU(xstate->xformer_prog = "cat";)
+ /* fall through to seeking bck over bytes we read earlier */
+
+ USE_FOR_NOMMU(found_magic:)
+ /* NOMMU version of fork_transformer execs
+ * an external unzipper that wants
+ * file position at the start of the file.
+ */
xlseek(fd, offset, SEEK_CUR);
- return 1;
- found_magic:
+ USE_FOR_MMU(found_magic:)
+ /* In MMU case, if magic was found, seeking back is not necessary */
+
+ return xstate;
+}
+
+/* Used by e.g. rpm which gives us a fd without filename,
+ * thus we can't guess the format from filename's extension.
+ */
+int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_compressed)
+{
+ transformer_state_t *xstate = setup_transformer_on_fd(fd, fail_if_not_compressed);
+
+ if (!xstate || !xstate->xformer) {
+ free(xstate);
+ return 1;
+ }
+
# if BB_MMU
- open_transformer_with_no_sig(fd, xformer);
+ fork_transformer_with_no_sig(xstate->src_fd, xstate->xformer);
# else
- /* NOMMU version of open_transformer execs
- * an external unzipper that wants
- * file position at the start of the file */
- xlseek(fd, offset, SEEK_CUR);
- open_transformer_with_sig(fd, xformer, xformer_prog);
+ fork_transformer_with_sig(xstate->src_fd, xstate->xformer, xstate->xformer_prog);
# endif
+ free(xstate);
return 0;
}
-int FAST_FUNC open_zipped(const char *fname, int fail_if_not_compressed)
+static transformer_state_t *open_transformer(const char *fname, int fail_if_not_compressed)
{
+ transformer_state_t *xstate;
int fd;
fd = open(fname, O_RDONLY);
if (fd < 0)
- return fd;
+ return NULL;
if (ENABLE_FEATURE_SEAMLESS_LZMA) {
/* .lzma has no header/signature, can only detect it by extension */
char *sfx = strrchr(fname, '.');
if (sfx && strcmp(sfx+1, "lzma") == 0) {
- open_transformer_with_sig(fd, unpack_lzma_stream, "unlzma");
- return fd;
+ xstate = xzalloc(sizeof(*xstate));
+ xstate->src_fd = fd;
+ xstate->xformer = unpack_lzma_stream;
+ USE_FOR_NOMMU(xstate->xformer_prog = "unlzma";)
+ return xstate;
}
}
- if ((ENABLE_FEATURE_SEAMLESS_GZ)
- || (ENABLE_FEATURE_SEAMLESS_BZ2)
- || (ENABLE_FEATURE_SEAMLESS_XZ)
- ) {
- setup_unzip_on_fd(fd, fail_if_not_compressed);
+
+ xstate = setup_transformer_on_fd(fd, fail_if_not_compressed);
+
+ return xstate;
+}
+
+int FAST_FUNC open_zipped(const char *fname, int fail_if_not_compressed)
+{
+ int fd;
+ transformer_state_t *xstate;
+
+ xstate = open_transformer(fname, fail_if_not_compressed);
+ if (!xstate)
+ return -1;
+
+ fd = xstate->src_fd;
+ if (xstate->xformer) {
+# if BB_MMU
+ fork_transformer_with_no_sig(xstate->src_fd, xstate->xformer);
+# else
+ fork_transformer_with_sig(xstate->src_fd, xstate->xformer, xstate->xformer_prog);
+# endif
}
+ /* else: the file is not compressed */
+ free(xstate);
return fd;
}
-#endif /* SEAMLESS_COMPRESSION */
-
void* FAST_FUNC xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p)
{
+# if 1
+ transformer_state_t *xstate;
+ char *image;
+
+ xstate = open_transformer(fname, /*fail_if_not_compressed:*/ 0);
+ if (!xstate) /* file open error */
+ return NULL;
+
+ image = NULL;
+ if (xstate->xformer) {
+ /* In-memory decompression */
+ xstate->mem_output_size_max = maxsz_p ? *maxsz_p : (size_t)(INT_MAX - 4095);
+ xstate->xformer(xstate);
+ if (xstate->mem_output_buf) {
+ image = xstate->mem_output_buf;
+ if (maxsz_p)
+ *maxsz_p = xstate->mem_output_size;
+ }
+ } else {
+ /* File is not compressed */
+ image = xmalloc_read(xstate->src_fd, maxsz_p);
+ }
+
+ if (!image)
+ bb_perror_msg("read error from '%s'", fname);
+ close(xstate->src_fd);
+ free(xstate);
+ return image;
+# else
+ /* This version forks a subprocess - much more expensive */
int fd;
char *image;
@@ -221,6 +344,8 @@ void* FAST_FUNC xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_
if (!image)
bb_perror_msg("read error from '%s'", fname);
close(fd);
-
return image;
+# endif
}
+
+#endif /* SEAMLESS_COMPRESSION */
generated by cgit v1.1 at 2024-12-27 10:14:11 +0000