From a65186233c96d48e43d5e0d054c1b7067d430cb8 Mon Sep 17 00:00:00 2001 From: Jason Self Date: Sat, 28 May 2016 12:35:07 -0700 Subject: [PATCH 1/1] Importing lz4json from https://github.com/andikleen/lz4json --- Makefile | 7 +++++ README | 9 ++++++ lz4jsoncat.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 103 insertions(+) create mode 100644 Makefile create mode 100644 README create mode 100644 lz4jsoncat.c diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..ae4b94e --- /dev/null +++ b/Makefile @@ -0,0 +1,7 @@ +CFLAGS := -g -O2 -Wall +LDLIBS := -llz4 + +lz4jsoncat: lz4jsoncat.c + +clean: + rm -f lz4jsoncat diff --git a/README b/README new file mode 100644 index 0000000..e4d3a66 --- /dev/null +++ b/README @@ -0,0 +1,9 @@ +A little utility to unpack lz4json files as generated by Firefox's book mark backups. +This is a different format from what the normal lz4 utility expects. +The data is dumped to stdout. + +Requires liblz4 to be installed and a little endian host + +lz4jsoncat ~/.mozilla/.../bookmarkbackups/bookmarks-2014-12-27_151_0UCIWGB4x3hhQXpuSMs5WQ==.jsonlz4 + +-Andi Kleen diff --git a/lz4jsoncat.c b/lz4jsoncat.c new file mode 100644 index 0000000..2060105 --- /dev/null +++ b/lz4jsoncat.c @@ -0,0 +1,87 @@ +/* + * Dump mozilla style lz4json files. + * + * Copyright (c) 2014 Intel Corporation + * Author: Andi Kleen + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* File format reference: + http://mxr.mozilla.org/mozilla-central/source/toolkit/components/workerlz4/lz4.js + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "lz4.h" + +/* Assumes little endian host for the length */ + +int main(int ac, char **av) +{ + while (*++av) { + int fd = open(*av, O_RDONLY); + if (fd < 0) { + perror(*av); + continue; + } + struct stat st; + if (fstat(fd, &st) < 0) { + perror(*av); + exit(1); + } + if (st.st_size < 12) { + fprintf(stderr, "%s: file too short\n", *av); + exit(1); + } + + unsigned ps = sysconf(_SC_PAGE_SIZE); + char *map = mmap(NULL, (st.st_size + ps - 1) & ~(ps - 1), PROT_READ, + MAP_SHARED, fd, 0); + if (map == (char *)-1) { + perror(*av); + exit(1); + } + if (memcmp(map, "mozLz40", 8)) { + fprintf(stderr, "%s: not a mozLZ4a file\n", *av); + exit(1); + } + size_t outsz = *(uint32_t *) (map + 8); + char *out = malloc(outsz); + if (!out) { + fprintf(stderr, "Cannot allocate memory\n"); + exit(1); + } + if (LZ4_decompress_safe_partial(map + 12, out, st.st_size - 12, outsz, outsz) < 0) { + fprintf(stderr, "%s: decompression error\n", *av); + exit(1); + } + if (write(1, out, outsz) < outsz) { + perror("write"); + exit(1); + } + free(out); + munmap(map, (st.st_size + ps - 1) & ~(ps - 1)); + close(fd); + + } + return 0; +} + + + -- 2.31.1