}
int FAST_FUNC bbunpack(char **argv,
- IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
+ IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_aux_data_t *aux),
char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
const char *expected_ext
)
IF_DESKTOP(long long) int status;
char *filename, *new_name;
smallint exitcode = 0;
- unpack_info_t info;
+ transformer_aux_data_t aux;
do {
/* NB: new_name is *maybe* malloc'ed! */
"use -f to force it");
}
- /* memset(&info, 0, sizeof(info)); */
- info.mtime = 0; /* so far it has one member only */
- status = unpacker(&info);
+ init_transformer_aux_data(&aux);
+ aux.check_signature = 1;
+ status = unpacker(&aux);
if (status < 0)
exitcode = 1;
char *del = new_name;
if (status >= 0) {
/* TODO: restore other things? */
- if (info.mtime) {
+ if (aux.mtime != 0) {
struct timeval times[2];
- times[1].tv_sec = times[0].tv_sec = info.mtime;
+ times[1].tv_sec = times[0].tv_sec = aux.mtime;
times[1].tv_usec = times[0].tv_usec = 0;
/* Note: we closed it first.
* On some systems calling utimes
#if ENABLE_UNCOMPRESS
static
-IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(transformer_aux_data_t *aux)
{
- IF_DESKTOP(long long) int status = -1;
-
- if ((xread_char(STDIN_FILENO) != 0x1f) || (xread_char(STDIN_FILENO) != 0x9d)) {
- bb_error_msg("invalid magic");
- } else {
- status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
- }
- return status;
+ return unpack_Z_stream(aux, STDIN_FILENO, STDOUT_FILENO);
}
int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int uncompress_main(int argc UNUSED_PARAM, char **argv)
return filename;
}
static
-IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(unpack_info_t *info)
+IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(transformer_aux_data_t *aux)
{
IF_DESKTOP(long long) int status = -1;
+ uint16_t magic2;
- /* do the decompression, and cleanup */
- if (xread_char(STDIN_FILENO) == 0x1f) {
- unsigned char magic2;
-
- magic2 = xread_char(STDIN_FILENO);
- if (ENABLE_FEATURE_SEAMLESS_Z && magic2 == 0x9d) {
- status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
- } else if (magic2 == 0x8b) {
- status = unpack_gz_stream_with_info(STDIN_FILENO, STDOUT_FILENO, info);
- } else {
- goto bad_magic;
- }
- if (status < 0) {
- bb_error_msg("error inflating");
- }
+//TODO: fold below into unpack_gz_stream? Then the whole level of indirection
+// unpack_FOO() -> unpack_FOO_stream can be collapsed in this module!
+
+ aux->check_signature = 0; /* we will check it here, not in unpack_*_stream */
+
+ if (full_read(STDIN_FILENO, &magic2, 2) != 2)
+ goto bad_magic;
+ if (ENABLE_FEATURE_SEAMLESS_Z && magic2 == COMPRESS_MAGIC) {
+ status = unpack_Z_stream(aux, STDIN_FILENO, STDOUT_FILENO);
+ } else if (magic2 == GZIP_MAGIC) {
+ status = unpack_gz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
} else {
bad_magic:
bb_error_msg("invalid magic");
/* status is still == -1 */
}
+ if (status < 0) {
+ bb_error_msg("error inflating");
+ }
return status;
}
/*
//applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
#if ENABLE_BUNZIP2
static
-IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(transformer_aux_data_t *aux)
{
- return unpack_bz2_stream_prime(STDIN_FILENO, STDOUT_FILENO);
+ return unpack_bz2_stream(aux, STDIN_FILENO, STDOUT_FILENO);
}
int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int bunzip2_main(int argc UNUSED_PARAM, char **argv)
#if ENABLE_UNLZMA
static
-IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(transformer_aux_data_t *aux)
{
- return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
+ return unpack_lzma_stream(aux, STDIN_FILENO, STDOUT_FILENO);
}
int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int unlzma_main(int argc UNUSED_PARAM, char **argv)
#if ENABLE_UNXZ
static
-IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(transformer_aux_data_t *aux)
{
- struct {
- uint32_t v1;
- uint16_t v2;
- } magic;
- xread(STDIN_FILENO, &magic, 6);
- if (magic.v1 != XZ_MAGIC1a || magic.v2 != XZ_MAGIC2a) {
- bb_error_msg("invalid magic");
- return -1;
- }
- return unpack_xz_stream(STDIN_FILENO, STDOUT_FILENO);
+ return unpack_xz_stream(aux, STDIN_FILENO, STDOUT_FILENO);
}
int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int unxz_main(int argc UNUSED_PARAM, char **argv)
}
static
-IF_DESKTOP(long long) int FAST_FUNC compressStream(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC compressStream(transformer_aux_data_t *aux UNUSED_PARAM)
{
IF_DESKTOP(long long) int total;
ssize_t count;
/* ======================================================================== */
static
-IF_DESKTOP(long long) int FAST_FUNC pack_gzip(unpack_info_t *info UNUSED_PARAM)
+IF_DESKTOP(long long) int FAST_FUNC pack_gzip(transformer_aux_data_t *aux UNUSED_PARAM)
{
struct stat s;
/* 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(int src_fd, int dst_fd)
+unpack_bz2_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
bunzip_data *bd;
int i;
unsigned len;
+ if (check_signature16(aux, src_fd, BZIP2_MAGIC))
+ return -1;
+
outbuf = xmalloc(IOBUF_SIZE);
len = 0;
while (1) { /* "Process one BZ... stream" loop */
return i ? i : IF_DESKTOP(total_written) + 0;
}
-IF_DESKTOP(long long) int FAST_FUNC
-unpack_bz2_stream_prime(int src_fd, int dst_fd)
-{
- uint16_t magic2;
- xread(src_fd, &magic2, 2);
- if (magic2 != BZIP2_MAGIC) {
- bb_error_msg_and_die("invalid magic");
- }
- return unpack_bz2_stream(src_fd, dst_fd);
-}
-
#ifdef TESTING
static char *const bunzip_errors[] = {
int i;
char c;
- int i = unpack_bz2_stream_prime(0, 1);
+ int i = unpack_bz2_stream(0, 1);
if (i < 0)
fprintf(stderr, "%s\n", bunzip_errors[-i]);
else if (read(STDIN_FILENO, &c, 1))
/* For unzip */
IF_DESKTOP(long long) int FAST_FUNC
-inflate_unzip(inflate_unzip_result *res, off_t compr_size, int in, int out)
+inflate_unzip(transformer_aux_data_t *aux, int in, int out)
{
IF_DESKTOP(long long) int n;
DECLARE_STATE;
ALLOC_STATE;
- to_read = compr_size;
+ to_read = aux->bytes_in;
// bytebuffer_max = 0x8000;
bytebuffer_offset = 4;
bytebuffer = xmalloc(bytebuffer_max);
n = inflate_unzip_internal(PASS_STATE in, out);
free(bytebuffer);
- res->crc = gunzip_crc;
- res->bytes_out = gunzip_bytes_out;
+ aux->crc32 = gunzip_crc;
+ aux->bytes_out = gunzip_bytes_out;
DEALLOC_STATE;
return n;
}
return res;
}
-static int check_header_gzip(STATE_PARAM unpack_info_t *info)
+static int check_header_gzip(STATE_PARAM transformer_aux_data_t *aux)
{
union {
unsigned char raw[8];
}
}
- if (info)
- info->mtime = SWAP_LE32(header.formatted.mtime);
+ if (aux)
+ aux->mtime = SWAP_LE32(header.formatted.mtime);
/* Read the header checksum */
if (header.formatted.flags & 0x02) {
}
IF_DESKTOP(long long) int FAST_FUNC
-unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
+unpack_gz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
uint32_t v32;
IF_DESKTOP(long long) int total, n;
DECLARE_STATE;
+ if (check_signature16(aux, src_fd, GZIP_MAGIC))
+ return -1;
+
total = 0;
ALLOC_STATE;
gunzip_src_fd = src_fd;
again:
- if (!check_header_gzip(PASS_STATE info)) {
+ if (!check_header_gzip(PASS_STATE aux)) {
bb_error_msg("corrupted data");
total = -1;
goto ret;
DEALLOC_STATE;
return total;
}
-
-IF_DESKTOP(long long) int FAST_FUNC
-unpack_gz_stream(int in, int out)
-{
- return unpack_gz_stream_with_info(in, out, NULL);
-}
*/
IF_DESKTOP(long long) int FAST_FUNC
-unpack_Z_stream(int src_fd, int dst_fd)
+unpack_Z_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
IF_DESKTOP(long long) int retval = -1;
/* block compress mode -C compatible with 2.0 */
int block_mode; /* = BLOCK_MODE; */
+ if (check_signature16(aux, src_fd, COMPRESS_MAGIC))
+ return -1;
+
inbuf = xzalloc(IBUFSIZ + 64);
outbuf = xzalloc(OBUFSIZ + 2048);
htab = xzalloc(HSIZE); /* wasn't zeroed out before, maybe can xmalloc? */
IF_DESKTOP(long long) int FAST_FUNC
-unpack_lzma_stream(int src_fd, int dst_fd)
+unpack_lzma_stream(transformer_aux_data_t *aux UNUSED_PARAM, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
lzma_header_t header;
#include "unxz/xz_dec_stream.c"
IF_DESKTOP(long long) int FAST_FUNC
-unpack_xz_stream(int src_fd, int dst_fd)
+unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
struct xz_buf iobuf;
struct xz_dec *state;
global_crc32_table = crc32_filltable(NULL, /*endian:*/ 0);
memset(&iobuf, 0, sizeof(iobuf));
- /* Preload XZ file signature */
- membuf = (void*) strcpy(xmalloc(2 * BUFSIZ), HEADER_MAGIC);
+ membuf = xmalloc(2 * BUFSIZ);
iobuf.in = membuf;
- iobuf.in_size = HEADER_MAGIC_SIZE;
iobuf.out = membuf + BUFSIZ;
iobuf.out_size = BUFSIZ;
+ if (!aux || aux->check_signature == 0) {
+ /* Preload XZ file signature */
+ strcpy((char*)membuf, HEADER_MAGIC);
+ iobuf.in_size = HEADER_MAGIC_SIZE;
+ } /* else: let xz code read & check it */
+
/* Limit memory usage to about 64 MiB. */
state = xz_dec_init(XZ_DYNALLOC, 64*1024*1024);
|| memcmp(tar.magic, "\0\0\0\0", 5) != 0)
) {
#if ENABLE_FEATURE_TAR_AUTODETECT
- char FAST_FUNC (*get_header_ptr)(archive_handle_t *);
- uint16_t magic2;
-
autodetect:
- magic2 = *(bb__aliased_uint16_t*)tar.name;
- /* tar gz/bz autodetect: check for gz/bz2 magic.
- * If we see the magic, and it is the very first block,
- * we can switch to get_header_tar_gz/bz2/lzma().
- * Needs seekable fd. I wish recv(MSG_PEEK) works
- * on any fd... */
-# if ENABLE_FEATURE_SEAMLESS_GZ
- if (magic2 == GZIP_MAGIC) {
- get_header_ptr = get_header_tar_gz;
- } else
-# endif
-# if ENABLE_FEATURE_SEAMLESS_BZ2
- if (magic2 == BZIP2_MAGIC
- && tar.name[2] == 'h' && isdigit(tar.name[3])
- ) { /* bzip2 */
- get_header_ptr = get_header_tar_bz2;
- } else
-# endif
-# if ENABLE_FEATURE_SEAMLESS_XZ
- //TODO: if (magic2 == XZ_MAGIC1)...
- //else
-# endif
- goto err;
/* Two different causes for lseek() != 0:
* unseekable fd (would like to support that too, but...),
* or not first block (false positive, it's not .gz/.bz2!) */
if (lseek(archive_handle->src_fd, -i, SEEK_CUR) != 0)
goto err;
- while (get_header_ptr(archive_handle) == EXIT_SUCCESS)
- continue;
- return EXIT_FAILURE;
+ if (setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_detected:*/ 0) != 0)
err:
-#endif /* FEATURE_TAR_AUTODETECT */
+ bb_error_msg_and_die("invalid tar magic");
+ archive_handle->offset = 0;
+ goto again_after_align;
+#endif
bb_error_msg_and_die("invalid tar magic");
}
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer(archive_handle->src_fd, unpack_bz2_stream_prime, "bunzip2");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle)
{
-#if BB_MMU
- uint16_t magic;
-#endif
-
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
- * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
- * need the header. */
-#if BB_MMU
- xread(archive_handle->src_fd, &magic, 2);
- /* Can skip this check, but error message will be less clear */
- if (magic != GZIP_MAGIC) {
- bb_error_msg_and_die("invalid gzip magic");
- }
-#endif
-
- open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_gz_stream, "gunzip");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
#include "libbb.h"
#include "bb_archive.h"
-#define ZIPPED (ENABLE_FEATURE_SEAMLESS_LZMA \
- || ENABLE_FEATURE_SEAMLESS_BZ2 \
- || ENABLE_FEATURE_SEAMLESS_GZ \
- /* || ENABLE_FEATURE_SEAMLESS_Z */ \
-)
+void FAST_FUNC init_transformer_aux_data(transformer_aux_data_t *aux)
+{
+ memset(aux, 0, sizeof(*aux));
+}
-#if ZIPPED
-# include "bb_archive.h"
+int FAST_FUNC check_signature16(transformer_aux_data_t *aux, int src_fd, unsigned magic16)
+{
+ if (aux && aux->check_signature) {
+ uint16_t magic2;
+ if (full_read(src_fd, &magic2, 2) != 2 || magic2 != magic16) {
+ bb_error_msg("invalid magic");
+#if 0 /* possible future extension */
+ if (aux->check_signature > 1)
+ xfunc_die();
#endif
+ return -1;
+ }
+ }
+ return 0;
+}
/* transformer(), more than meets the eye */
-/*
- * On MMU machine, the transform_prog is removed by macro magic
- * in include/archive.h. On NOMMU, transformer is removed.
- */
+#if BB_MMU
void FAST_FUNC open_transformer(int fd,
- IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd),
- const char *transform_prog)
+ int check_signature,
+ IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd)
+)
+#else
+void FAST_FUNC open_transformer(int fd, const char *transform_prog)
+#endif
{
struct fd_pair fd_pipe;
int pid;
close(fd_pipe.rd); /* we don't want to read from the parent */
// FIXME: error check?
#if BB_MMU
- transformer(fd, fd_pipe.wr);
- if (ENABLE_FEATURE_CLEAN_UP) {
- close(fd_pipe.wr); /* send EOF */
- close(fd);
+ {
+ transformer_aux_data_t aux;
+ init_transformer_aux_data(&aux);
+ aux.check_signature = check_signature;
+ transformer(&aux, fd, fd_pipe.wr);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(fd_pipe.wr); /* send EOF */
+ close(fd);
+ }
+ /* must be _exit! bug was actually seen here */
+ _exit(EXIT_SUCCESS);
}
- /* must be _exit! bug was actually seen here */
- _exit(EXIT_SUCCESS);
#else
{
char *argv[4];
}
+#if SEAMLESS_COMPRESSION
+
/* Used by e.g. rpm which gives us a fd without filename,
* thus we can't guess the format from filename's extension.
*/
-#if ZIPPED
-void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
+int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_detected)
{
- const int fail_if_not_detected = 1;
union {
uint8_t b[4];
uint16_t b16[2];
uint32_t b32[1];
} magic;
int offset = -2;
-# if BB_MMU
- IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
- enum { xformer_prog = 0 };
-# else
- enum { xformer = 0 };
- const char *xformer_prog;
-# endif
+ USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd);)
+ USE_FOR_NOMMU(const char *xformer_prog;)
/* .gz and .bz2 both have 2-byte signature, and their
* unpack_XXX_stream wants this header skipped. */
if (ENABLE_FEATURE_SEAMLESS_GZ
&& magic.b16[0] == GZIP_MAGIC
) {
-# if BB_MMU
- xformer = unpack_gz_stream;
-# else
- xformer_prog = "gunzip";
-# endif
+ USE_FOR_MMU(xformer = unpack_gz_stream;)
+ USE_FOR_NOMMU(xformer_prog = "gunzip";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_BZ2
&& magic.b16[0] == BZIP2_MAGIC
) {
-# if BB_MMU
- xformer = unpack_bz2_stream;
-# else
- xformer_prog = "bunzip2";
-# endif
+ USE_FOR_MMU(xformer = unpack_bz2_stream;)
+ USE_FOR_NOMMU(xformer_prog = "bunzip2";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_XZ
offset = -6;
xread(fd, magic.b32, sizeof(magic.b32[0]));
if (magic.b32[0] == XZ_MAGIC2) {
-# if BB_MMU
- xformer = unpack_xz_stream;
- /* unpack_xz_stream wants fd at position 6, no need to seek */
- //xlseek(fd, offset, SEEK_CUR);
-# else
- xformer_prog = "unxz";
-# endif
+ USE_FOR_MMU(xformer = unpack_xz_stream;)
+ USE_FOR_NOMMU(xformer_prog = "unxz";)
goto found_magic;
}
}
IF_FEATURE_SEAMLESS_XZ("/xz")
" magic");
xlseek(fd, offset, SEEK_CUR);
- return;
+ return 1;
found_magic:
-# if !BB_MMU
+# if BB_MMU
+ open_transformer_with_no_sig(fd, 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);
# endif
- open_transformer(fd, xformer, xformer_prog);
+ return 0;
}
-#endif /* ZIPPED */
int FAST_FUNC open_zipped(const char *fname)
{
-#if !ZIPPED
- return open(fname, O_RDONLY);
-#else
char *sfx;
int fd;
sfx++;
if (ENABLE_FEATURE_SEAMLESS_LZMA && strcmp(sfx, "lzma") == 0)
/* .lzma has no header/signature, just trust it */
- open_transformer(fd, unpack_lzma_stream, "unlzma");
+ open_transformer_with_sig(fd, unpack_lzma_stream, "unlzma");
else
if ((ENABLE_FEATURE_SEAMLESS_GZ && strcmp(sfx, "gz") == 0)
|| (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, "bz2") == 0)
|| (ENABLE_FEATURE_SEAMLESS_XZ && strcmp(sfx, "xz") == 0)
) {
- setup_unzip_on_fd(fd /*, fail_if_not_detected: 1*/);
+ setup_unzip_on_fd(fd, /*fail_if_not_detected:*/ 1);
}
}
return fd;
-#endif
}
+#endif /* SEAMLESS_COMPRESSION */
+
void* FAST_FUNC xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p)
{
int fd;
return xasprintf("%s.lzo", filename);
}
-static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(unpack_info_t *info UNUSED_PARAM)
+static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(transformer_aux_data_t *aux UNUSED_PARAM)
{
if (option_mask32 & OPT_DECOMPRESS)
return do_lzo_decompress();
archive_handle->src_fd = fd;
/*archive_handle->offset = 0; - init_handle() did it */
- setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
+ setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_detected:*/ 1);
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
continue;
}
return sizeof(header) + len;
}
+#if SEAMLESS_COMPRESSION
+static void handle_SIGCHLD(int signo UNUSED_PARAM)
+{
+ int status;
+
+ /* Wait for any child without blocking */
+ for (;;) {
+ if (wait_any_nohang(&status) < 0)
+ /* wait failed?! I'm confused... */
+ return;
+ if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
+ /* this child exited with 0 */
+ continue;
+ /* Cannot happen?
+ if (!WIFSIGNALED(status) && !WIFEXITED(status)) ???; */
+ bb_got_signal = 1;
+ }
+}
+#endif
+
/* No getopt required */
int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
/* Skip the main header */
skip_header();
-#if 0
+#if SEAMLESS_COMPRESSION
+ /* We need to know whether child (gzip/bzip/etc) exits abnormally */
+ signal(SIGCHLD, handle_SIGCHLD);
+#endif
+
/* This works, but doesn't report uncompress errors (they happen in child) */
- setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/);
+ setup_unzip_on_fd(rpm_fd, /*fail_if_not_detected:*/ 1);
if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");
-#else
- /* BLOAT */
- {
- union {
- uint8_t b[4];
- uint16_t b16[2];
- uint32_t b32[1];
- } magic;
- IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
-
- xread(rpm_fd, magic.b16, sizeof(magic.b16[0]));
- if (magic.b16[0] == GZIP_MAGIC) {
- unpack = unpack_gz_stream;
- } else
- if (ENABLE_FEATURE_SEAMLESS_BZ2
- && magic.b16[0] == BZIP2_MAGIC
- ) {
- unpack = unpack_bz2_stream;
- } else
- if (ENABLE_FEATURE_SEAMLESS_XZ
- && magic.b16[0] == XZ_MAGIC1
- ) {
- xread(rpm_fd, magic.b32, sizeof(magic.b32[0]));
- if (magic.b32[0] != XZ_MAGIC2)
- goto no_magic;
- /* unpack_xz_stream wants fd at position 6, no need to seek */
- //xlseek(rpm_fd, -6, SEEK_CUR);
- unpack = unpack_xz_stream;
- } else {
- no_magic:
- bb_error_msg_and_die("no gzip"
- IF_FEATURE_SEAMLESS_BZ2("/bzip2")
- IF_FEATURE_SEAMLESS_XZ("/xz")
- " magic");
- }
- if (unpack(rpm_fd, STDOUT_FILENO) < 0)
- bb_error_msg_and_die("error unpacking");
- }
-#endif
if (ENABLE_FEATURE_CLEAN_UP) {
close(rpm_fd);
}
- return 0;
+#if SEAMLESS_COMPRESSION
+ return bb_got_signal;
+#else
+ return EXIT_SUCCESS;
+#endif
}
# define append_file_list_to_list(x) 0
#endif
-#if ENABLE_FEATURE_SEAMLESS_Z
-static char FAST_FUNC get_header_tar_Z(archive_handle_t *archive_handle)
-{
- /* Can't lseek over pipes */
- archive_handle->seek = seek_by_read;
-
- /* do the decompression, and cleanup */
- if (xread_char(archive_handle->src_fd) != 0x1f
- || xread_char(archive_handle->src_fd) != 0x9d
- ) {
- bb_error_msg_and_die("invalid magic");
- }
-
- open_transformer(archive_handle->src_fd, unpack_Z_stream, "uncompress");
- archive_handle->offset = 0;
- while (get_header_tar(archive_handle) == EXIT_SUCCESS)
- continue;
-
- /* Can only do one file at a time */
- return EXIT_FAILURE;
-}
-#else
-# define get_header_tar_Z NULL
-#endif
-
#ifdef CHECK_FOR_CHILD_EXITCODE
/* Looks like it isn't needed - tar detects malformed (truncated)
* archive if e.g. bunzip2 fails */
OPT_NUMERIC_OWNER = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER )) + 0, // numeric-owner
OPT_NOPRESERVE_PERM = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NOPRESERVE_PERM)) + 0, // no-same-permissions
OPT_OVERWRITE = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_OVERWRITE )) + 0, // overwrite
+
+ OPT_ANY_COMPRESS = (OPT_BZIP2 | OPT_LZMA | OPT_GZIP | OPT_COMPRESS),
};
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
static const char tar_longopts[] ALIGN1 =
int tar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int tar_main(int argc UNUSED_PARAM, char **argv)
{
- char FAST_FUNC (*get_header_ptr)(archive_handle_t *) = get_header_tar;
archive_handle_t *tar_handle;
char *base_dir = NULL;
const char *tar_filename = "-";
tar_handle->ah_flags |= ARCHIVE_O_TRUNC;
}
- if (opt & OPT_GZIP)
- get_header_ptr = get_header_tar_gz;
-
- if (opt & OPT_BZIP2)
- get_header_ptr = get_header_tar_bz2;
-
- if (opt & OPT_LZMA)
- get_header_ptr = get_header_tar_lzma;
-
- if (opt & OPT_COMPRESS)
- get_header_ptr = get_header_tar_Z;
-
if (opt & OPT_NOPRESERVE_TIME)
tar_handle->ah_flags &= ~ARCHIVE_RESTORE_DATE;
} else {
if (ENABLE_FEATURE_TAR_AUTODETECT
&& flags == O_RDONLY
- && get_header_ptr == get_header_tar
+ && !(opt & OPT_ANY_COMPRESS)
) {
tar_handle->src_fd = open_zipped(tar_filename);
if (tar_handle->src_fd < 0)
tar_handle->reject, zipMode);
}
- while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
+ if (opt & OPT_ANY_COMPRESS) {
+ USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd);)
+ USE_FOR_NOMMU(const char *xformer_prog;)
+
+ if (opt & OPT_COMPRESS)
+ USE_FOR_MMU(xformer = unpack_Z_stream;)
+ USE_FOR_NOMMU(xformer_prog = "uncompress";)
+ if (opt & OPT_GZIP)
+ USE_FOR_MMU(xformer = unpack_gz_stream;)
+ USE_FOR_NOMMU(xformer_prog = "gunzip";)
+ if (opt & OPT_BZIP2)
+ USE_FOR_MMU(xformer = unpack_bz2_stream;)
+ USE_FOR_NOMMU(xformer_prog = "bunzip2";)
+ if (opt & OPT_LZMA)
+ USE_FOR_MMU(xformer = unpack_lzma_stream;)
+ USE_FOR_NOMMU(xformer_prog = "unlzma";)
+
+ open_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
+ /* Can't lseek over pipes */
+ tar_handle->seek = seek_by_read;
+ /*tar_handle->offset = 0; - already is */
+ }
+
+ while (get_header_tar(tar_handle) == EXIT_SUCCESS)
continue;
/* Check that every file that should have been extracted was */
if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
close(tar_handle->src_fd);
+#ifdef CHECK_FOR_CHILD_EXITCODE
+ return bb_got_signal;
+#else
return EXIT_SUCCESS;
+#endif
}
bb_copyfd_exact_size(zip_fd, dst_fd, size);
} else {
/* Method 8 - inflate */
- inflate_unzip_result res;
- if (inflate_unzip(&res, zip_header->formatted.cmpsize, zip_fd, dst_fd) < 0)
+ transformer_aux_data_t aux;
+ init_transformer_aux_data(&aux);
+ aux.bytes_in = zip_header->formatted.cmpsize;
+ if (inflate_unzip(&aux, zip_fd, dst_fd) < 0)
bb_error_msg_and_die("inflate error");
/* Validate decompression - crc */
- if (zip_header->formatted.crc32 != (res.crc ^ 0xffffffffL)) {
+ if (zip_header->formatted.crc32 != (aux.crc32 ^ 0xffffffffL)) {
bb_error_msg_and_die("crc error");
}
/* Validate decompression - size */
- if (zip_header->formatted.ucmpsize != res.bytes_out) {
+ if (zip_header->formatted.ucmpsize != aux.bytes_out) {
/* Don't die. Who knows, maybe len calculation
* was botched somewhere. After all, crc matched! */
bb_error_msg("bad length");
Example 1
One example how to reduce global data usage is in
-archival/libarchive/decompress_gunzip.c:
+archival/libarchive/decompress_unzip.c:
/* This is somewhat complex-looking arrangement, but it allows
* to place decompressor state either in bss or in
-/* Info struct unpackers can fill out to inform users of thing like
- * timestamps of unpacked files */
-typedef struct unpack_info_t {
- time_t mtime;
-} unpack_info_t;
-
archive_handle_t *init_handle(void) FAST_FUNC;
char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
-typedef struct inflate_unzip_result {
- off_t bytes_out;
- uint32_t crc;
-} inflate_unzip_result;
-
-IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
-/* xz unpacker takes .xz stream from offset 6 */
-IF_DESKTOP(long long) int unpack_xz_stream(int src_fd, int dst_fd) FAST_FUNC;
-/* lzma unpacker takes .lzma stream from offset 0 */
-IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
-/* the rest wants 2 first bytes already skipped by the caller */
-IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
-IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
-IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
-IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) FAST_FUNC;
-/* wrapper which checks first two bytes to be "BZ" */
-IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
+/* Meaning and direction (input/output) of the fields are transformer-specific */
+typedef struct transformer_aux_data_t {
+ smallint check_signature; /* most often referenced member */
+ off_t bytes_out;
+ off_t bytes_in; /* used in unzip code only: needs to know packed size */
+ uint32_t crc32;
+ time_t mtime; /* gunzip code may set this on exit */
+} transformer_aux_data_t;
+
+void init_transformer_aux_data(transformer_aux_data_t *aux) FAST_FUNC;
+int FAST_FUNC check_signature16(transformer_aux_data_t *aux, int src_fd, unsigned magic16) FAST_FUNC;
+
+IF_DESKTOP(long long) int inflate_unzip(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_Z_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_gz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_bz2_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_lzma_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
int bbunpack(char **argv,
- IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
+ IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_aux_data_t *aux),
char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
const char *expected_ext
) FAST_FUNC;
#if BB_MMU
void open_transformer(int fd,
- IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
-#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
+ int check_signature,
+ IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd)
+) FAST_FUNC;
+#define open_transformer_with_sig(fd, transformer, transform_prog) open_transformer((fd), 1, (transformer))
+#define open_transformer_with_no_sig(fd, transformer) open_transformer((fd), 0, (transformer))
#else
-void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
-#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
+void open_transformer(int fd, const char *transform_prog) FAST_FUNC;
+#define open_transformer_with_sig(fd, transformer, transform_prog) open_transformer((fd), (transform_prog))
+/* open_transformer_with_no_sig() does not exist on NOMMU */
#endif
+
POP_SAVED_FUNCTION_VISIBILITY
#endif
|| ENABLE_FEATURE_SEAMLESS_GZ \
|| ENABLE_FEATURE_SEAMLESS_Z)
+#if SEAMLESS_COMPRESSION
/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
-#if ENABLE_FEATURE_SEAMLESS_LZMA \
- || ENABLE_FEATURE_SEAMLESS_BZ2 \
- || ENABLE_FEATURE_SEAMLESS_GZ \
- /* || ENABLE_FEATURE_SEAMLESS_Z */
-extern void setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/) FAST_FUNC;
-#else
-# define setup_unzip_on_fd(...) ((void)0)
-#endif
+extern int setup_unzip_on_fd(int fd, int fail_if_not_detected) FAST_FUNC;
/* Autodetects .gz etc */
extern int open_zipped(const char *fname) FAST_FUNC;
+#else
+# define setup_unzip_on_fd(...) (0)
+# define open_zipped(fname) open((fname), O_RDONLY);
+#endif
extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
projects / oweals / busybox.git / commitdiff