mirror of
https://git.FreeBSD.org/src.git
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331 lines
7.2 KiB
C
331 lines
7.2 KiB
C
/*
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* ----------------------------------------------------------------------------
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* Derived from mkuzip.c by Aleksandr Rybalko <ray@ddteam.net>
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <sobomax@FreeBSD.ORG> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Maxim Sobolev
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*
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*/
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#include <sys/disk.h>
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <lzma.h>
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#define CLSTSIZE 16384
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#define DEFAULT_SUFX ".ulzma"
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#define USED_BLOCKSIZE DEV_BSIZE
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#define CLOOP_MAGIC_LEN 128
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/* Format L3.0, since we move to XZ API */
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static char CLOOP_MAGIC_START[] =
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"#!/bin/sh\n"
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"#L3.0\n"
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"n=uncompress\n"
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"m=geom_$n\n"
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"(kldstat -m $m 2>&-||kldload $m)>&-&&"
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"mount_cd9660 /dev/`mdconfig -af $0`.$n $1\n"
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"exit $?\n";
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static char *readblock(int, char *, u_int32_t);
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static void usage(void);
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static void *safe_malloc(size_t);
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static void cleanup(void);
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static char *cleanfile = NULL;
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int main(int argc, char **argv)
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{
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char *iname, *oname, *obuf, *ibuf;
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int fdr, fdw, i, opt, verbose, tmp;
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struct iovec iov[2];
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struct stat sb;
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uint32_t destlen;
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uint64_t offset;
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uint64_t *toc;
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lzma_filter filters[2];
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lzma_options_lzma opt_lzma;
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lzma_ret ret;
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lzma_stream strm = LZMA_STREAM_INIT;
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struct cloop_header {
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char magic[CLOOP_MAGIC_LEN]; /* cloop magic */
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uint32_t blksz; /* block size */
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uint32_t nblocks; /* number of blocks */
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} hdr;
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memset(&hdr, 0, sizeof(hdr));
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hdr.blksz = CLSTSIZE;
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strcpy(hdr.magic, CLOOP_MAGIC_START);
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oname = NULL;
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verbose = 0;
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while((opt = getopt(argc, argv, "o:s:v")) != -1) {
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switch(opt) {
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case 'o':
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oname = optarg;
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break;
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case 's':
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tmp = atoi(optarg);
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if (tmp <= 0) {
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errx(1,
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"invalid cluster size specified: %s",
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optarg);
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/* Not reached */
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}
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if (tmp % USED_BLOCKSIZE != 0) {
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errx(1,
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"cluster size should be multiple of %d",
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USED_BLOCKSIZE);
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/* Not reached */
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}
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if ( tmp > MAXPHYS) {
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errx(1, "cluster size is too large");
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/* Not reached */
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}
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hdr.blksz = tmp;
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break;
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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/* Not reached */
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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usage();
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/* Not reached */
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}
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iname = argv[0];
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if (oname == NULL) {
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asprintf(&oname, "%s%s", iname, DEFAULT_SUFX);
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if (oname == NULL) {
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err(1, "can't allocate memory");
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/* Not reached */
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}
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}
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obuf = safe_malloc(hdr.blksz*2);
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ibuf = safe_malloc(hdr.blksz);
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signal(SIGHUP, exit);
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signal(SIGINT, exit);
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signal(SIGTERM, exit);
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signal(SIGXCPU, exit);
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signal(SIGXFSZ, exit);
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atexit(cleanup);
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fdr = open(iname, O_RDONLY);
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if (fdr < 0) {
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err(1, "open(%s)", iname);
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/* Not reached */
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}
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if (fstat(fdr, &sb) != 0) {
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err(1, "fstat(%s)", iname);
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/* Not reached */
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}
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if (S_ISCHR(sb.st_mode)) {
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off_t ms;
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if (ioctl(fdr, DIOCGMEDIASIZE, &ms) < 0) {
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err(1, "ioctl(DIOCGMEDIASIZE)");
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/* Not reached */
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}
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sb.st_size = ms;
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} else if (!S_ISREG(sb.st_mode)) {
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fprintf(stderr,
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"%s: not a character device or regular file\n",
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iname);
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exit(1);
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}
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hdr.nblocks = sb.st_size / hdr.blksz;
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if ((sb.st_size % hdr.blksz) != 0) {
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if (verbose != 0)
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fprintf(stderr, "file size is not multiple "
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"of %d, padding data\n", hdr.blksz);
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hdr.nblocks++;
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}
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toc = safe_malloc((hdr.nblocks + 1) * sizeof(*toc));
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fdw = open(oname, O_WRONLY | O_TRUNC | O_CREAT,
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S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
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if (fdw < 0) {
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err(1, "open(%s)", oname);
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/* Not reached */
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}
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cleanfile = oname;
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/*
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* Prepare header that we will write later when we have index ready.
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*/
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iov[0].iov_base = (char *)&hdr;
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iov[0].iov_len = sizeof(hdr);
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iov[1].iov_base = (char *)toc;
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iov[1].iov_len = (hdr.nblocks + 1) * sizeof(*toc);
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offset = iov[0].iov_len + iov[1].iov_len;
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/* Reserve space for header */
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lseek(fdw, offset, SEEK_SET);
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if (verbose != 0)
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fprintf(stderr, "data size %ju bytes, number of clusters "
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"%u, index length %zu bytes\n", sb.st_size,
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hdr.nblocks, iov[1].iov_len);
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/* Init lzma encoder */
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if (lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT))
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errx(1, "Error loading LZMA preset");
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filters[0].id = LZMA_FILTER_LZMA2;
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filters[0].options = &opt_lzma;
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filters[1].id = LZMA_VLI_UNKNOWN;
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for(i = 0; i == 0 || ibuf != NULL; i++) {
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ibuf = readblock(fdr, ibuf, hdr.blksz);
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if (ibuf != NULL) {
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destlen = hdr.blksz*2;
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ret = lzma_stream_encoder(&strm, filters,
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LZMA_CHECK_CRC32);
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if (ret != LZMA_OK) {
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if (ret == LZMA_MEMLIMIT_ERROR)
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errx(1, "can't compress data: "
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"LZMA_MEMLIMIT_ERROR");
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errx(1, "can't compress data: "
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"LZMA compressor ERROR");
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}
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strm.next_in = ibuf;
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strm.avail_in = hdr.blksz;
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strm.next_out = obuf;
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strm.avail_out = hdr.blksz*2;
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ret = lzma_code(&strm, LZMA_FINISH);
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if (ret != LZMA_STREAM_END) {
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/* Error */
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errx(1, "lzma_code FINISH failed, code=%d, "
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"pos(in=%zd, out=%zd)",
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ret,
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(hdr.blksz - strm.avail_in),
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(hdr.blksz*2 - strm.avail_out));
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}
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destlen -= strm.avail_out;
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lzma_end(&strm);
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if (verbose != 0)
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fprintf(stderr, "cluster #%d, in %u bytes, "
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"out %u bytes\n", i, hdr.blksz, destlen);
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} else {
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destlen = USED_BLOCKSIZE - (offset % USED_BLOCKSIZE);
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memset(obuf, 0, destlen);
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if (verbose != 0)
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fprintf(stderr, "padding data with %u bytes"
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" so that file size is multiple of %d\n",
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destlen,
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USED_BLOCKSIZE);
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}
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if (write(fdw, obuf, destlen) < 0) {
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err(1, "write(%s)", oname);
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/* Not reached */
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}
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toc[i] = htobe64(offset);
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offset += destlen;
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}
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close(fdr);
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if (verbose != 0)
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fprintf(stderr, "compressed data to %ju bytes, saved %lld "
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"bytes, %.2f%% decrease.\n", offset,
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(long long)(sb.st_size - offset),
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100.0 * (long long)(sb.st_size - offset) /
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(float)sb.st_size);
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/* Convert to big endian */
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hdr.blksz = htonl(hdr.blksz);
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hdr.nblocks = htonl(hdr.nblocks);
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/* Write headers into pre-allocated space */
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lseek(fdw, 0, SEEK_SET);
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if (writev(fdw, iov, 2) < 0) {
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err(1, "writev(%s)", oname);
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/* Not reached */
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}
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cleanfile = NULL;
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close(fdw);
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exit(0);
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}
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static char *
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readblock(int fd, char *ibuf, u_int32_t clstsize)
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{
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int numread;
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bzero(ibuf, clstsize);
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numread = read(fd, ibuf, clstsize);
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if (numread < 0) {
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err(1, "read() failed");
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/* Not reached */
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}
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if (numread == 0) {
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return NULL;
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}
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return ibuf;
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: mkulzma [-v] [-o outfile] [-s cluster_size] "
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"infile\n");
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exit(1);
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}
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static void *
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safe_malloc(size_t size)
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{
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void *retval;
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retval = malloc(size);
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if (retval == NULL) {
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err(1, "can't allocate memory");
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/* Not reached */
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}
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return retval;
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}
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static void
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cleanup(void)
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{
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if (cleanfile != NULL)
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unlink(cleanfile);
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}
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