libarchive: add capability to unpack to mem.buffer
The performance and number of processes for a "depmod -a" with gzipped modules was abysmal. This patch adds a code path without fork, benefiting all users of xmalloc_open_zipped_read_close. "modinfo radeon.ko.gz", a single-file reader, got 30% faster. "depmod -a", which used to fork over 800 times, got 20% faster. Heavily based on a patch by Lauri Kasanen <curaga@operamail.com> function old new delta setup_transformer_on_fd - 159 +159 transformer_write - 122 +122 fork_transformer - 112 +112 xmalloc_open_zipped_read_close 63 118 +55 read_bunzip 1866 1896 +30 xtransformer_write - 19 +19 unzip_main 2449 2462 +13 bbunpack 755 766 +11 unpack_lzma_stream 2717 2723 +6 unpack_xz_stream 2393 2397 +4 unpack_Z_stream 1173 1175 +2 inflate_unzip 111 105 -6 check_signature16 70 63 -7 unpack_bz2_stream 359 349 -10 unpack_unxz 12 - -12 unpack_unlzma 12 - -12 unpack_uncompress 12 - -12 unpack_gunzip 12 - -12 unpack_bunzip2 12 - -12 open_transformer 106 92 -14 inflate_unzip_internal 1945 1916 -29 unpack_gz_stream 693 655 -38 open_zipped 89 47 -42 setup_unzip_on_fd 142 53 -89 ------------------------------------------------------------------------------ (add/remove: 4/5 grow/shrink: 7/8 up/down: 533/-295) Total: 238 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
e7800f351a
commit
b4c11c1397
@ -122,6 +122,8 @@ int FAST_FUNC bbunpack(char **argv,
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if (!(option_mask32 & SEAMLESS_MAGIC)) {
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init_transformer_state(&xstate);
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xstate.check_signature = 1;
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/*xstate.src_fd = STDIN_FILENO; - already is */
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xstate.dst_fd = STDOUT_FILENO;
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status = unpacker(&xstate);
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if (status < 0)
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exitcode = 1;
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@ -226,18 +228,13 @@ char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
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//applet:IF_UNCOMPRESS(APPLET(uncompress, BB_DIR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_UNCOMPRESS) += bbunzip.o
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#if ENABLE_UNCOMPRESS
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(transformer_state_t *xstate)
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{
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return unpack_Z_stream(xstate, STDIN_FILENO, STDOUT_FILENO);
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}
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int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int uncompress_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "cf");
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argv += optind;
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return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
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return bbunpack(argv, unpack_Z_stream, make_new_name_generic, "Z");
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}
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#endif
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@ -324,11 +321,6 @@ char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UN
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}
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return filename;
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}
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(transformer_state_t *xstate)
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{
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return unpack_gz_stream(xstate, STDIN_FILENO, STDOUT_FILENO);
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}
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/*
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* Linux kernel build uses gzip -d -n. We accept and ignore it.
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* Man page says:
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@ -355,7 +347,7 @@ int gunzip_main(int argc UNUSED_PARAM, char **argv)
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if (applet_name[1] == 'c')
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option_mask32 |= OPT_STDOUT | SEAMLESS_MAGIC;
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return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
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return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL);
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}
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#endif
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@ -395,11 +387,6 @@ int gunzip_main(int argc UNUSED_PARAM, char **argv)
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//kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o
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//kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o
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#if ENABLE_BUNZIP2
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(transformer_state_t *xstate)
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{
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return unpack_bz2_stream(xstate, STDIN_FILENO, STDOUT_FILENO);
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}
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int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int bunzip2_main(int argc UNUSED_PARAM, char **argv)
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{
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@ -408,7 +395,7 @@ int bunzip2_main(int argc UNUSED_PARAM, char **argv)
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if (applet_name[2] == 'c') /* bzcat */
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option_mask32 |= OPT_STDOUT;
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return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
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return bbunpack(argv, unpack_bz2_stream, make_new_name_generic, "bz2");
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}
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#endif
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@ -494,11 +481,6 @@ int bunzip2_main(int argc UNUSED_PARAM, char **argv)
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//applet:IF_LZMA(APPLET_ODDNAME(lzma, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzma))
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//kbuild:lib-$(CONFIG_UNLZMA) += bbunzip.o
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#if ENABLE_UNLZMA
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(transformer_state_t *xstate)
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{
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return unpack_lzma_stream(xstate, STDIN_FILENO, STDOUT_FILENO);
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}
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int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int unlzma_main(int argc UNUSED_PARAM, char **argv)
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{
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@ -513,7 +495,7 @@ int unlzma_main(int argc UNUSED_PARAM, char **argv)
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option_mask32 |= OPT_STDOUT;
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argv += optind;
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return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
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return bbunpack(argv, unpack_lzma_stream, make_new_name_generic, "lzma");
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}
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#endif
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@ -537,11 +519,6 @@ int unlzma_main(int argc UNUSED_PARAM, char **argv)
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//applet:IF_XZ(APPLET_ODDNAME(xz, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xz))
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//kbuild:lib-$(CONFIG_UNXZ) += bbunzip.o
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#if ENABLE_UNXZ
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static
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IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(transformer_state_t *xstate)
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{
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return unpack_xz_stream(xstate, STDIN_FILENO, STDOUT_FILENO);
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}
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int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int unxz_main(int argc UNUSED_PARAM, char **argv)
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{
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@ -556,6 +533,6 @@ int unxz_main(int argc UNUSED_PARAM, char **argv)
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option_mask32 |= OPT_STDOUT;
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argv += optind;
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return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");
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return bbunpack(argv, unpack_xz_stream, make_new_name_generic, "xz");
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}
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#endif
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@ -731,7 +731,7 @@ void FAST_FUNC 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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IF_DESKTOP(long long) int FAST_FUNC
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unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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unpack_bz2_stream(transformer_state_t *xstate)
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{
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IF_DESKTOP(long long total_written = 0;)
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bunzip_data *bd;
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@ -739,14 +739,14 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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int i;
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unsigned len;
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if (check_signature16(xstate, src_fd, BZIP2_MAGIC))
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if (check_signature16(xstate, BZIP2_MAGIC))
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return -1;
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outbuf = xmalloc(IOBUF_SIZE);
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len = 0;
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while (1) { /* "Process one BZ... stream" loop */
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i = start_bunzip(&bd, src_fd, outbuf + 2, len);
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i = start_bunzip(&bd, xstate->src_fd, outbuf + 2, len);
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if (i == 0) {
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while (1) { /* "Produce some output bytes" loop */
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@ -756,8 +756,7 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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i = IOBUF_SIZE - i; /* number of bytes produced */
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if (i == 0) /* EOF? */
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break;
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if (i != full_write(dst_fd, outbuf, i)) {
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bb_error_msg("short write");
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if (i != transformer_write(xstate, outbuf, i)) {
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i = RETVAL_SHORT_WRITE;
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goto release_mem;
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}
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@ -790,7 +789,7 @@ unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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len = bd->inbufCount - bd->inbufPos;
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memcpy(outbuf, &bd->inbuf[bd->inbufPos], len);
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if (len < 2) {
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if (safe_read(src_fd, outbuf + len, 2 - len) != 2 - len)
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if (safe_read(xstate->src_fd, outbuf + len, 2 - len) != 2 - len)
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break;
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len = 2;
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}
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@ -971,7 +971,7 @@ static int inflate_get_next_window(STATE_PARAM_ONLY)
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/* Called from unpack_gz_stream() and inflate_unzip() */
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static IF_DESKTOP(long long) int
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inflate_unzip_internal(STATE_PARAM int in, int out)
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inflate_unzip_internal(STATE_PARAM transformer_state_t *xstate)
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{
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IF_DESKTOP(long long) int n = 0;
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ssize_t nwrote;
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@ -980,7 +980,7 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
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gunzip_window = xmalloc(GUNZIP_WSIZE);
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gunzip_outbuf_count = 0;
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gunzip_bytes_out = 0;
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gunzip_src_fd = in;
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gunzip_src_fd = xstate->src_fd;
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/* (re) initialize state */
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method = -1;
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@ -1002,9 +1002,8 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
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while (1) {
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int r = inflate_get_next_window(PASS_STATE_ONLY);
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nwrote = full_write(out, gunzip_window, gunzip_outbuf_count);
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if (nwrote != (ssize_t)gunzip_outbuf_count) {
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bb_perror_msg("write");
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nwrote = transformer_write(xstate, gunzip_window, gunzip_outbuf_count);
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if (nwrote == (ssize_t)-1) {
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n = -1;
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goto ret;
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}
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@ -1034,7 +1033,7 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
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/* For unzip */
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IF_DESKTOP(long long) int FAST_FUNC
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inflate_unzip(transformer_state_t *xstate, int in, int out)
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inflate_unzip(transformer_state_t *xstate)
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{
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IF_DESKTOP(long long) int n;
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DECLARE_STATE;
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@ -1045,7 +1044,7 @@ inflate_unzip(transformer_state_t *xstate, int in, int out)
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// bytebuffer_max = 0x8000;
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bytebuffer_offset = 4;
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bytebuffer = xmalloc(bytebuffer_max);
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n = inflate_unzip_internal(PASS_STATE in, out);
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n = inflate_unzip_internal(PASS_STATE xstate);
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free(bytebuffer);
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xstate->crc32 = gunzip_crc;
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@ -1169,8 +1168,7 @@ static int check_header_gzip(STATE_PARAM transformer_state_t *xstate)
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}
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}
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if (xstate)
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xstate->mtime = SWAP_LE32(header.formatted.mtime);
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xstate->mtime = SWAP_LE32(header.formatted.mtime);
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/* Read the header checksum */
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if (header.formatted.flags & 0x02) {
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@ -1182,27 +1180,27 @@ static int check_header_gzip(STATE_PARAM transformer_state_t *xstate)
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}
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IF_DESKTOP(long long) int FAST_FUNC
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unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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unpack_gz_stream(transformer_state_t *xstate)
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{
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uint32_t v32;
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IF_DESKTOP(long long) int total, n;
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DECLARE_STATE;
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#if !ENABLE_FEATURE_SEAMLESS_Z
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if (check_signature16(xstate, src_fd, GZIP_MAGIC))
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if (check_signature16(xstate, GZIP_MAGIC))
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return -1;
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#else
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if (xstate && xstate->check_signature) {
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if (xstate->check_signature) {
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uint16_t magic2;
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if (full_read(src_fd, &magic2, 2) != 2) {
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if (full_read(xstate->src_fd, &magic2, 2) != 2) {
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bad_magic:
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bb_error_msg("invalid magic");
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return -1;
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}
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if (magic2 == COMPRESS_MAGIC) {
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xstate->check_signature = 0;
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return unpack_Z_stream(xstate, src_fd, dst_fd);
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return unpack_Z_stream(xstate);
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}
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if (magic2 != GZIP_MAGIC)
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goto bad_magic;
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@ -1215,7 +1213,7 @@ unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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to_read = -1;
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// bytebuffer_max = 0x8000;
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bytebuffer = xmalloc(bytebuffer_max);
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gunzip_src_fd = src_fd;
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gunzip_src_fd = xstate->src_fd;
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again:
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if (!check_header_gzip(PASS_STATE xstate)) {
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@ -1224,7 +1222,7 @@ unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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goto ret;
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}
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n = inflate_unzip_internal(PASS_STATE src_fd, dst_fd);
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n = inflate_unzip_internal(PASS_STATE xstate);
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if (n < 0) {
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total = -1;
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goto ret;
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@ -73,7 +73,7 @@
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*/
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IF_DESKTOP(long long) int FAST_FUNC
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unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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unpack_Z_stream(transformer_state_t *xstate)
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{
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IF_DESKTOP(long long total_written = 0;)
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IF_DESKTOP(long long) int retval = -1;
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@ -102,7 +102,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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/* block compress mode -C compatible with 2.0 */
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int block_mode; /* = BLOCK_MODE; */
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if (check_signature16(xstate, src_fd, COMPRESS_MAGIC))
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if (check_signature16(xstate, COMPRESS_MAGIC))
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return -1;
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inbuf = xzalloc(IBUFSIZ + 64);
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@ -114,7 +114,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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/* xread isn't good here, we have to return - caller may want
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* to do some cleanup (e.g. delete incomplete unpacked file etc) */
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if (full_read(src_fd, inbuf, 1) != 1) {
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if (full_read(xstate->src_fd, inbuf, 1) != 1) {
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bb_error_msg("short read");
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goto err;
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}
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@ -166,7 +166,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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}
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if (insize < (int) (IBUFSIZ + 64) - IBUFSIZ) {
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rsize = safe_read(src_fd, inbuf + insize, IBUFSIZ);
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rsize = safe_read(xstate->src_fd, inbuf + insize, IBUFSIZ);
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if (rsize < 0)
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bb_error_msg_and_die(bb_msg_read_error);
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insize += rsize;
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@ -274,7 +274,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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}
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if (outpos >= OBUFSIZ) {
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xwrite(dst_fd, outbuf, outpos);
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xtransformer_write(xstate, outbuf, outpos);
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IF_DESKTOP(total_written += outpos;)
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outpos = 0;
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}
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@ -301,7 +301,7 @@ unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd)
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} while (rsize > 0);
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if (outpos > 0) {
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xwrite(dst_fd, outbuf, outpos);
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xtransformer_write(xstate, outbuf, outpos);
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IF_DESKTOP(total_written += outpos;)
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}
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@ -206,7 +206,7 @@ enum {
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IF_DESKTOP(long long) int FAST_FUNC
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unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst_fd)
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unpack_lzma_stream(transformer_state_t *xstate)
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{
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IF_DESKTOP(long long total_written = 0;)
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lzma_header_t header;
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@ -223,7 +223,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
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int state = 0;
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uint32_t rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
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if (full_read(src_fd, &header, sizeof(header)) != sizeof(header)
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if (full_read(xstate->src_fd, &header, sizeof(header)) != sizeof(header)
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|| header.pos >= (9 * 5 * 5)
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) {
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bb_error_msg("bad lzma header");
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@ -258,7 +258,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
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p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1;
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}
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rc = rc_init(src_fd); /*, RC_BUFFER_SIZE); */
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rc = rc_init(xstate->src_fd); /*, RC_BUFFER_SIZE); */
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while (global_pos + buffer_pos < header.dst_size) {
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int pos_state = (buffer_pos + global_pos) & pos_state_mask;
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@ -306,7 +306,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
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if (buffer_pos == header.dict_size) {
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buffer_pos = 0;
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global_pos += header.dict_size;
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if (full_write(dst_fd, buffer, header.dict_size) != (ssize_t)header.dict_size)
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if (transformer_write(xstate, buffer, header.dict_size) != (ssize_t)header.dict_size)
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goto bad;
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IF_DESKTOP(total_written += header.dict_size;)
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}
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@ -440,7 +440,7 @@ unpack_lzma_stream(transformer_state_t *xstate UNUSED_PARAM, int src_fd, int dst
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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 */
|
||||
}
|
||||
|
||||
@ -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;
|
||||
}
|
||||
|
||||
@ -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;
|
||||
|
||||
@ -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;
|
||||
|
||||
@ -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;
|
||||
|
||||
@ -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");
|
||||
xlseek(fd, offset, SEEK_CUR);
|
||||
return 1;
|
||||
|
||||
found_magic:
|
||||
# if BB_MMU
|
||||
open_transformer_with_no_sig(fd, xformer);
|
||||
# else
|
||||
/* NOMMU version of open_transformer execs
|
||||
/* 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 */
|
||||
* file position at the start of the file.
|
||||
*/
|
||||
xlseek(fd, offset, SEEK_CUR);
|
||||
open_transformer_with_sig(fd, xformer, xformer_prog);
|
||||
|
||||
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
|
||||
fork_transformer_with_no_sig(xstate->src_fd, xstate->xformer);
|
||||
# else
|
||||
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 */
|
||||
|
||||
@ -1171,7 +1171,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
|
||||
}
|
||||
|
||||
if (opt & OPT_ANY_COMPRESS) {
|
||||
USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate, int src_fd, int dst_fd);)
|
||||
USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate);)
|
||||
USE_FOR_NOMMU(const char *xformer_prog;)
|
||||
|
||||
if (opt & OPT_COMPRESS)
|
||||
@ -1190,7 +1190,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
|
||||
USE_FOR_MMU(xformer = unpack_xz_stream;)
|
||||
USE_FOR_NOMMU(xformer_prog = "unxz";)
|
||||
|
||||
open_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
|
||||
fork_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 */
|
||||
|
||||
@ -283,7 +283,9 @@ static void unzip_extract(zip_header_t *zip_header, int dst_fd)
|
||||
transformer_state_t xstate;
|
||||
init_transformer_state(&xstate);
|
||||
xstate.bytes_in = zip_header->formatted.cmpsize;
|
||||
if (inflate_unzip(&xstate, zip_fd, dst_fd) < 0)
|
||||
xstate.src_fd = zip_fd;
|
||||
xstate.dst_fd = dst_fd;
|
||||
if (inflate_unzip(&xstate) < 0)
|
||||
bb_error_msg_and_die("inflate error");
|
||||
/* Validate decompression - crc */
|
||||
if (zip_header->formatted.crc32 != (xstate.crc32 ^ 0xffffffffL)) {
|
||||
|
||||
@ -205,6 +205,18 @@ void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
|
||||
/* Meaning and direction (input/output) of the fields are transformer-specific */
|
||||
typedef struct transformer_state_t {
|
||||
smallint check_signature; /* most often referenced member */
|
||||
|
||||
IF_DESKTOP(long long) int FAST_FUNC (*xformer)(struct transformer_state_t *xstate);
|
||||
USE_FOR_NOMMU(const char *xformer_prog;)
|
||||
|
||||
/* Source */
|
||||
int src_fd;
|
||||
/* Output */
|
||||
int dst_fd;
|
||||
size_t mem_output_size_max; /* if non-zero, decompress to RAM instead of fd */
|
||||
size_t mem_output_size;
|
||||
char *mem_output_buf;
|
||||
|
||||
off_t bytes_out;
|
||||
off_t bytes_in; /* used in unzip code only: needs to know packed size */
|
||||
uint32_t crc32;
|
||||
@ -212,14 +224,16 @@ typedef struct transformer_state_t {
|
||||
} transformer_state_t;
|
||||
|
||||
void init_transformer_state(transformer_state_t *xstate) FAST_FUNC;
|
||||
int FAST_FUNC check_signature16(transformer_state_t *xstate, int src_fd, unsigned magic16) FAST_FUNC;
|
||||
ssize_t transformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize) FAST_FUNC;
|
||||
ssize_t xtransformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize) FAST_FUNC;
|
||||
int check_signature16(transformer_state_t *xstate, unsigned magic16) FAST_FUNC;
|
||||
|
||||
IF_DESKTOP(long long) int inflate_unzip(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_Z_stream(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_gz_stream(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_bz2_stream(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_lzma_stream(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_xz_stream(transformer_state_t *xstate, int src_fd, int dst_fd) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int inflate_unzip(transformer_state_t *xstate) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_Z_stream(transformer_state_t *xstate) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_gz_stream(transformer_state_t *xstate) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_bz2_stream(transformer_state_t *xstate) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_lzma_stream(transformer_state_t *xstate) FAST_FUNC;
|
||||
IF_DESKTOP(long long) int unpack_xz_stream(transformer_state_t *xstate) FAST_FUNC;
|
||||
|
||||
char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
|
||||
int bbunpack(char **argv,
|
||||
@ -230,16 +244,16 @@ int bbunpack(char **argv,
|
||||
|
||||
void check_errors_in_children(int signo);
|
||||
#if BB_MMU
|
||||
void open_transformer(int fd,
|
||||
void 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)
|
||||
) 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))
|
||||
#define fork_transformer_with_sig(fd, transformer, transform_prog) fork_transformer((fd), 1, (transformer))
|
||||
#define fork_transformer_with_no_sig(fd, transformer) fork_transformer((fd), 0, (transformer))
|
||||
#else
|
||||
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 */
|
||||
void fork_transformer(int fd, const char *transform_prog) FAST_FUNC;
|
||||
#define fork_transformer_with_sig(fd, transformer, transform_prog) fork_transformer((fd), (transform_prog))
|
||||
/* fork_transformer_with_no_sig() does not exist on NOMMU */
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
@ -755,11 +755,12 @@ unsigned bb_clk_tck(void) FAST_FUNC;
|
||||
extern int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC;
|
||||
/* Autodetects .gz etc */
|
||||
extern int open_zipped(const char *fname, int fail_if_not_compressed) FAST_FUNC;
|
||||
extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
||||
#else
|
||||
# define setup_unzip_on_fd(...) (0)
|
||||
# define open_zipped(fname, fail_if_not_compressed) open((fname), O_RDONLY);
|
||||
# define xmalloc_open_zipped_read_close(fname, maxsz_p) xmalloc_open_read_close((fname), (maxsz_p))
|
||||
#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;
|
||||
// NB: will return short write on error, not -1,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user