this repo has no description
Add unxip tool for unpacking XIP files
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src/CMakeLists.txt
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src/CMakeLists.txt
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src/unxip/CMakeLists.txt
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src/unxip/CMakeLists.txt
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project(unxip)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -nostdinc")
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include_directories(
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${CMAKE_SOURCE_DIR}/src/xar
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${CMAKE_SOURCE_DIR}/src/external/liblzma/src/liblzma/api
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)
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add_darling_executable(xip_extract_cpio xip_extract_cpio.c)
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target_link_libraries(xip_extract_cpio system lzma xar)
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install(TARGETS xip_extract_cpio DESTINATION libexec/darling/usr/libexec)
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install(FILES unxip DESTINATION libexec/darling/usr/bin)
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src/unxip/unxip
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src/unxip/unxip
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src/unxip/xip_extract_cpio.c
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src/unxip/xip_extract_cpio.c
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//
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// main.c
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// pbzx
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//
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// Created by PHPdev32 on 6/20/14.
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// Licensed under GPLv3, full text at http://www.gnu.org/licenses/gpl-3.0.txt
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//
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// This code originated here: http://www.tonymacx86.com/threads/pbzx-stream-parser.135458/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <xar/xar.h>
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#define min(A,B) ({ __typeof__(A) __a = (A); __typeof__(B) __b = (B); __a < __b ? __a : __b; })
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#define err(c, m) if (c) { fprintf(stderr, m"\n"); exit(__COUNTER__ + 1); }
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#define XBSZ 1024*4
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#define ZBSZ 1024
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static inline void xar_read(char *buffer, uint32_t size, xar_stream *stream) {
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stream->next_out = buffer;
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stream->avail_out = size;
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while (stream->avail_out)
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err(xar_extract_tostream(stream) != XAR_STREAM_OK, "XAR extraction failure");
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}
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static inline size_t cpio_out(char *buffer, size_t size) {
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size_t c = 0;
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while (c < size)
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c+= fwrite(buffer + c, 1, size - c, stdout);
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return c;
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}
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static inline uint64_t xar_read_64(xar_stream *stream) {
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char t[8];
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xar_read(t, 8, stream);
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return __builtin_bswap64(*(uint64_t *)t);
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}
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int main(int argc, const char * argv[])
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{
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char xbuf[XBSZ], *zbuf = malloc(ZBSZ);
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xar_t x;
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err(argc < 2, "No file specified");
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err(!(x = xar_open(argv[1], READ)), "XAR open failure");
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xar_iter_t i = xar_iter_new();
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xar_file_t f = xar_file_first(x, i);
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char *path;
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while (strncmp((path = xar_get_path(f)), "Content", 7) && (f = xar_file_next(i)))
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free(path);
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free(path);
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xar_iter_free(i);
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err(!f, "No payload");
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err(xar_verify(x, f) != XAR_STREAM_OK, "File verification failed");
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xar_stream xs;
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err(xar_extract_tostream_init(x, f, &xs) != XAR_STREAM_OK, "XAR init failed");
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xar_read(xbuf, 4, &xs);
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err(strncmp(xbuf, "pbzx", 4), "Not a pbzx stream");
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uint64_t length = 0, flags = xar_read_64(&xs), last = 0;
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while (flags & 1 << 24) {
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flags = xar_read_64(&xs);
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length = xar_read_64(&xs);
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while (length) {
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xar_read(xbuf, min(XBSZ, (uint32_t)length), &xs);
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cpio_out(xbuf, min(XBSZ, length));
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length -= last = min(XBSZ, length);
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}
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}
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xar_extract_tostream_end(&xs);
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free(zbuf);
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xar_close(x);
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return 0;
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}