Build xzdec and lzmadec from xzdec.c. xzdec supports only .xz
files and lzmadec only .lzma files.
This commit is contained in:
Lasse Collin
parent
86a0ed8f01
commit
f901a290ee
@ -12,7 +12,7 @@
|
||||
## Lesser General Public License for more details.
|
||||
##
|
||||
|
||||
bin_PROGRAMS = xzdec
|
||||
bin_PROGRAMS = xzdec lzmadec
|
||||
|
||||
xzdec_SOURCES = xzdec.c
|
||||
xzdec_CPPFLAGS = \
|
||||
@ -27,3 +27,8 @@ xzdec_LDADD = \
|
||||
if COND_GNULIB
|
||||
xzdec_LDADD += @top_builddir@/lib/libgnu.a
|
||||
endif
|
||||
|
||||
lzmadec_SOURCES = $(xzdec_SOURCES)
|
||||
lzmadec_CPPFLAGS = $(xzdec_CPPFLAGS) -DLZMADEC
|
||||
lzmadec_LDFLAGS = $(xzdec_LDFLAGS)
|
||||
lzmadec_LDADD = $(xzdec_LDADD)
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
/// \file xzdec.c
|
||||
/// \brief Simple single-threaded tool to uncompress .lzma files
|
||||
/// \brief Simple single-threaded tool to uncompress .xz or .lzma files
|
||||
//
|
||||
// Copyright (C) 2007 Lasse Collin
|
||||
//
|
||||
@ -31,51 +31,42 @@
|
||||
#include "physmem.h"
|
||||
|
||||
|
||||
enum return_code {
|
||||
SUCCESS,
|
||||
ERROR,
|
||||
WARNING,
|
||||
};
|
||||
#ifdef LZMADEC
|
||||
# define TOOL_FORMAT "lzma"
|
||||
#else
|
||||
# define TOOL_FORMAT "xz"
|
||||
#endif
|
||||
|
||||
|
||||
enum format_type {
|
||||
FORMAT_AUTO,
|
||||
FORMAT_NATIVE,
|
||||
FORMAT_ALONE,
|
||||
};
|
||||
|
||||
|
||||
enum {
|
||||
OPTION_FORMAT = INT_MIN,
|
||||
};
|
||||
|
||||
|
||||
/// Input buffer
|
||||
static uint8_t in_buf[BUFSIZ];
|
||||
|
||||
/// Output buffer
|
||||
static uint8_t out_buf[BUFSIZ];
|
||||
|
||||
/// Decoder
|
||||
static lzma_stream strm = LZMA_STREAM_INIT;
|
||||
|
||||
/// Number of bytes to use memory at maximum
|
||||
static uint64_t memlimit;
|
||||
|
||||
/// Program name to be shown in error messages
|
||||
static const char *argv0;
|
||||
|
||||
/// File currently being processed
|
||||
static FILE *file;
|
||||
|
||||
/// Name of the file currently being processed
|
||||
static const char *filename;
|
||||
static void lzma_attribute((noreturn))
|
||||
my_exit(void)
|
||||
{
|
||||
int status = EXIT_SUCCESS;
|
||||
|
||||
static enum return_code exit_status = SUCCESS;
|
||||
// Close stdout. We don't care about stderr, because we write to it
|
||||
// only when an error has already occurred.
|
||||
const int ferror_err = ferror(stdout);
|
||||
const int fclose_err = fclose(stdout);
|
||||
|
||||
static enum format_type format_type = FORMAT_AUTO;
|
||||
if (ferror_err || fclose_err) {
|
||||
// If it was fclose() that failed, we have the reason
|
||||
// in errno. If only ferror() indicated an error,
|
||||
// we have no idea what the reason was.
|
||||
fprintf(stderr, "%s: Cannot write to standard output: %s\n",
|
||||
argv0, fclose_err
|
||||
? strerror(errno) : "Unknown error");
|
||||
status = EXIT_FAILURE;
|
||||
}
|
||||
|
||||
static bool force = false;
|
||||
exit(status);
|
||||
}
|
||||
|
||||
|
||||
static void lzma_attribute((noreturn))
|
||||
@ -83,16 +74,14 @@ help(void)
|
||||
{
|
||||
printf(
|
||||
"Usage: %s [OPTION]... [FILE]...\n"
|
||||
"Uncompress files in the .lzma format to the standard output.\n"
|
||||
"Uncompress files in the ." TOOL_FORMAT " format to the standard output.\n"
|
||||
"\n"
|
||||
" -c, --stdout (ignored)\n"
|
||||
" -d, --decompress (ignored)\n"
|
||||
" -k, --keep (ignored)\n"
|
||||
" -f, --force allow reading compressed data from a terminal\n"
|
||||
" -f, --force (ignored)\n"
|
||||
" -M, --memory=NUM use NUM bytes of memory at maximum (0 means default);\n"
|
||||
" the suffixes k, M, G, Ki, Mi, and Gi are supported.\n"
|
||||
" --format=FMT accept only files in the given file format;\n"
|
||||
" possible FMTs are `auto', `native', and alone',\n"
|
||||
" -h, --help display this help and exit\n"
|
||||
" -V, --version display version and license information and exit\n"
|
||||
"\n"
|
||||
@ -102,32 +91,18 @@ help(void)
|
||||
" MiB of memory at maximum.\n"
|
||||
"\n"
|
||||
"Report bugs to <" PACKAGE_BUGREPORT "> (in English or Finnish).\n",
|
||||
argv0, ((uint64_t)(memlimit) + 512 * 1024) / (1024 * 1024));
|
||||
// Using PRIu64 above instead of %zu to support pre-C99 libc.
|
||||
exit(0);
|
||||
argv0, (memlimit + 512 * 1024) / (1024 * 1024));
|
||||
my_exit();
|
||||
}
|
||||
|
||||
|
||||
static void lzma_attribute((noreturn))
|
||||
version(void)
|
||||
{
|
||||
printf(
|
||||
"xzdec " PACKAGE_VERSION "\n"
|
||||
"\n"
|
||||
"Copyright (C) 1999-2006 Igor Pavlov\n"
|
||||
"Copyright (C) 2007 Lasse Collin\n"
|
||||
"\n"
|
||||
"This program is free software; you can redistribute it and/or\n"
|
||||
"modify it under the terms of the GNU Lesser General Public\n"
|
||||
"License as published by the Free Software Foundation; either\n"
|
||||
"version 2.1 of the License, or (at your option) any later version.\n"
|
||||
"\n"
|
||||
"This program is distributed in the hope that it will be useful,\n"
|
||||
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
|
||||
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
|
||||
"Lesser General Public License for more details.\n"
|
||||
"\n");
|
||||
exit(0);
|
||||
printf(TOOL_FORMAT "dec " PACKAGE_VERSION "\n"
|
||||
"liblzma %s\n", lzma_version_string());
|
||||
|
||||
my_exit();
|
||||
}
|
||||
|
||||
|
||||
@ -160,7 +135,7 @@ str_to_uint64(const char *value)
|
||||
|
||||
if (*value < '0' || *value > '9') {
|
||||
fprintf(stderr, "%s: %s: Not a number", argv0, value);
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
do {
|
||||
@ -204,7 +179,7 @@ str_to_uint64(const char *value)
|
||||
if (multiplier == 0) {
|
||||
fprintf(stderr, "%s: %s: Invalid suffix",
|
||||
argv0, value);
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
// Don't overflow here either.
|
||||
@ -231,7 +206,6 @@ parse_options(int argc, char **argv)
|
||||
{ "force", no_argument, NULL, 'f' },
|
||||
{ "keep", no_argument, NULL, 'k' },
|
||||
{ "memory", required_argument, NULL, 'M' },
|
||||
{ "format", required_argument, NULL, OPTION_FORMAT },
|
||||
{ "help", no_argument, NULL, 'h' },
|
||||
{ "version", no_argument, NULL, 'V' },
|
||||
{ NULL, 0, NULL, 0 }
|
||||
@ -244,11 +218,8 @@ parse_options(int argc, char **argv)
|
||||
switch (c) {
|
||||
case 'c':
|
||||
case 'd':
|
||||
case 'k':
|
||||
break;
|
||||
|
||||
case 'f':
|
||||
force = true;
|
||||
case 'k':
|
||||
break;
|
||||
|
||||
case 'M':
|
||||
@ -264,23 +235,8 @@ parse_options(int argc, char **argv)
|
||||
case 'V':
|
||||
version();
|
||||
|
||||
case OPTION_FORMAT: {
|
||||
if (strcmp("auto", optarg) == 0) {
|
||||
format_type = FORMAT_AUTO;
|
||||
} else if (strcmp("native", optarg) == 0) {
|
||||
format_type = FORMAT_NATIVE;
|
||||
} else if (strcmp("alone", optarg) == 0) {
|
||||
format_type = FORMAT_ALONE;
|
||||
} else {
|
||||
fprintf(stderr, "%s: %s: Unknown file format "
|
||||
"name\n", argv0, optarg);
|
||||
exit(ERROR);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
@ -288,31 +244,20 @@ parse_options(int argc, char **argv)
|
||||
}
|
||||
|
||||
|
||||
/// Initializes lzma_stream structure for decoding of a new Stream.
|
||||
static void
|
||||
init(void)
|
||||
uncompress(lzma_stream *strm, FILE *file, const char *filename)
|
||||
{
|
||||
const uint32_t flags = LZMA_TELL_UNSUPPORTED_CHECK | LZMA_CONCATENATED;
|
||||
lzma_ret ret;
|
||||
|
||||
switch (format_type) {
|
||||
case FORMAT_AUTO:
|
||||
ret = lzma_auto_decoder(&strm, memlimit, flags);
|
||||
break;
|
||||
|
||||
case FORMAT_NATIVE:
|
||||
ret = lzma_stream_decoder(&strm, memlimit, flags);
|
||||
break;
|
||||
|
||||
case FORMAT_ALONE:
|
||||
ret = lzma_alone_decoder(&strm, memlimit);
|
||||
break;
|
||||
|
||||
default:
|
||||
assert(0);
|
||||
ret = LZMA_PROG_ERROR;
|
||||
}
|
||||
// Initialize the decoder
|
||||
#ifdef LZMADEC
|
||||
ret = lzma_alone_decoder(strm, memlimit);
|
||||
#else
|
||||
ret = lzma_stream_decoder(strm, memlimit, LZMA_CONCATENATED);
|
||||
#endif
|
||||
|
||||
// The only reasonable error here is LZMA_MEM_ERROR.
|
||||
// FIXME: Maybe also LZMA_MEMLIMIT_ERROR in future?
|
||||
if (ret != LZMA_OK) {
|
||||
fprintf(stderr, "%s: ", argv0);
|
||||
|
||||
@ -321,36 +266,23 @@ init(void)
|
||||
else
|
||||
fprintf(stderr, "Internal program error (bug)\n");
|
||||
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
// Input and output buffers
|
||||
uint8_t in_buf[BUFSIZ];
|
||||
uint8_t out_buf[BUFSIZ];
|
||||
|
||||
|
||||
static void
|
||||
uncompress(void)
|
||||
{
|
||||
if (file == stdin && !force && isatty(STDIN_FILENO)) {
|
||||
fprintf(stderr, "%s: Compressed data not read from "
|
||||
"a terminal.\n%s: Use `-f' to force reading "
|
||||
"from a terminal, or `-h' for help.\n",
|
||||
argv0, argv0);
|
||||
exit(ERROR);
|
||||
}
|
||||
|
||||
init();
|
||||
|
||||
strm.avail_in = 0;
|
||||
strm.next_out = out_buf;
|
||||
strm.avail_out = BUFSIZ;
|
||||
strm->avail_in = 0;
|
||||
strm->next_out = out_buf;
|
||||
strm->avail_out = BUFSIZ;
|
||||
|
||||
lzma_action action = LZMA_RUN;
|
||||
|
||||
while (true) {
|
||||
if (strm.avail_in == 0) {
|
||||
strm.next_in = in_buf;
|
||||
strm.avail_in = fread(in_buf, 1, BUFSIZ, file);
|
||||
if (strm->avail_in == 0) {
|
||||
strm->next_in = in_buf;
|
||||
strm->avail_in = fread(in_buf, 1, BUFSIZ, file);
|
||||
|
||||
if (ferror(file)) {
|
||||
// POSIX says that fread() sets errno if
|
||||
@ -360,20 +292,24 @@ uncompress(void)
|
||||
"input file: %s\n",
|
||||
argv0, filename,
|
||||
strerror(errno));
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
#ifndef LZMADEC
|
||||
// When using LZMA_CONCATENATED, we need to tell
|
||||
// liblzma when it has got all the input.
|
||||
if (feof(file))
|
||||
action = LZMA_FINISH;
|
||||
#endif
|
||||
}
|
||||
|
||||
const lzma_ret ret = lzma_code(&strm, action);
|
||||
ret = lzma_code(strm, action);
|
||||
|
||||
// Write and check write error before checking decoder error.
|
||||
// This way as much data as possible gets written to output
|
||||
// even if decoder detected an error.
|
||||
if (strm.avail_out == 0 || ret != LZMA_OK) {
|
||||
const size_t write_size = BUFSIZ - strm.avail_out;
|
||||
if (strm->avail_out == 0 || ret != LZMA_OK) {
|
||||
const size_t write_size = BUFSIZ - strm->avail_out;
|
||||
|
||||
if (fwrite(out_buf, 1, write_size, stdout)
|
||||
!= write_size) {
|
||||
@ -383,58 +319,69 @@ uncompress(void)
|
||||
fprintf(stderr, "%s: Cannot write to "
|
||||
"standard output: %s\n", argv0,
|
||||
strerror(errno));
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
strm.next_out = out_buf;
|
||||
strm.avail_out = BUFSIZ;
|
||||
strm->next_out = out_buf;
|
||||
strm->avail_out = BUFSIZ;
|
||||
}
|
||||
|
||||
if (ret != LZMA_OK) {
|
||||
// FIXME !!! Doesn't work with LZMA_Alone for the
|
||||
// same reason as in process.c.
|
||||
if (ret == LZMA_STREAM_END)
|
||||
if (ret == LZMA_STREAM_END) {
|
||||
#ifdef LZMADEC
|
||||
// Check that there's no trailing garbage.
|
||||
if (strm->avail_in != 0
|
||||
|| fread(in_buf, 1, 1, file)
|
||||
!= 0
|
||||
|| !feof(file))
|
||||
ret = LZMA_DATA_ERROR;
|
||||
else
|
||||
return;
|
||||
#else
|
||||
// lzma_stream_decoder() already guarantees
|
||||
// that there's no trailing garbage.
|
||||
assert(strm->avail_in == 0);
|
||||
assert(action == LZMA_FINISH);
|
||||
assert(feof(file));
|
||||
return;
|
||||
#endif
|
||||
}
|
||||
|
||||
fprintf(stderr, "%s: %s: ", argv0, filename);
|
||||
|
||||
// FIXME Add LZMA_*_CHECK and LZMA_FORMAT_ERROR.
|
||||
const char *msg;
|
||||
switch (ret) {
|
||||
case LZMA_DATA_ERROR:
|
||||
fprintf(stderr, "File is corrupt\n");
|
||||
exit(ERROR);
|
||||
|
||||
case LZMA_OPTIONS_ERROR:
|
||||
fprintf(stderr, "Unsupported file "
|
||||
"format or filters\n");
|
||||
exit(ERROR);
|
||||
|
||||
case LZMA_MEM_ERROR:
|
||||
fprintf(stderr, "%s\n", strerror(ENOMEM));
|
||||
exit(ERROR);
|
||||
|
||||
case LZMA_MEMLIMIT_ERROR:
|
||||
fprintf(stderr, "Memory usage limit "
|
||||
"reached\n");
|
||||
exit(ERROR);
|
||||
|
||||
case LZMA_BUF_ERROR:
|
||||
fprintf(stderr, "Unexpected end of input\n");
|
||||
exit(ERROR);
|
||||
|
||||
case LZMA_UNSUPPORTED_CHECK:
|
||||
fprintf(stderr, "Unsupported type of "
|
||||
"integrity check; not "
|
||||
"verifying file integrity\n");
|
||||
exit_status = WARNING;
|
||||
msg = strerror(ENOMEM);
|
||||
break;
|
||||
|
||||
case LZMA_MEMLIMIT_ERROR:
|
||||
msg = "Memory usage limit reached";
|
||||
break;
|
||||
|
||||
case LZMA_FORMAT_ERROR:
|
||||
msg = "File format not recognized";
|
||||
break;
|
||||
|
||||
case LZMA_OPTIONS_ERROR:
|
||||
// FIXME: Better message?
|
||||
msg = "Unsupported compression options";
|
||||
break;
|
||||
|
||||
case LZMA_DATA_ERROR:
|
||||
msg = "File is corrupt";
|
||||
break;
|
||||
|
||||
case LZMA_BUF_ERROR:
|
||||
msg = "Unexpected end of input";
|
||||
break;
|
||||
|
||||
case LZMA_PROG_ERROR:
|
||||
default:
|
||||
fprintf(stderr, "Internal program "
|
||||
"error (bug)\n");
|
||||
exit(ERROR);
|
||||
msg = "Internal program error (bug)";
|
||||
break;
|
||||
}
|
||||
|
||||
fprintf(stderr, "%s: %s: %s", argv0, filename, msg);
|
||||
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -443,40 +390,50 @@ uncompress(void)
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
// Set the argv0 global so that we can print the command name in
|
||||
// error and help messages.
|
||||
argv0 = argv[0];
|
||||
|
||||
// Detect amount of installed RAM and set the memory usage limit.
|
||||
// This is needed before parsing the command line arguments.
|
||||
set_default_memlimit();
|
||||
|
||||
// Parse the command line options.
|
||||
parse_options(argc, argv);
|
||||
|
||||
// Initialize liblzma internals.
|
||||
lzma_init_decoder();
|
||||
|
||||
// The same lzma_stream is used for all files that we decode. This way
|
||||
// we don't need to reallocate memory for every file if they use same
|
||||
// compression settings.
|
||||
lzma_stream strm = LZMA_STREAM_INIT;
|
||||
|
||||
// Some systems require setting stdin and stdout to binary mode.
|
||||
#ifdef WIN32
|
||||
setmode(fileno(stdin), O_BINARY);
|
||||
setmode(fileno(stdout), O_BINARY);
|
||||
#endif
|
||||
|
||||
if (optind == argc) {
|
||||
file = stdin;
|
||||
filename = "(stdin)";
|
||||
uncompress();
|
||||
// No filenames given, decode from stdin.
|
||||
uncompress(&strm, stdin, "(stdin)");
|
||||
} else {
|
||||
// Loop through the filenames given on the command line.
|
||||
do {
|
||||
// "-" indicates stdin.
|
||||
if (strcmp(argv[optind], "-") == 0) {
|
||||
file = stdin;
|
||||
filename = "(stdin)";
|
||||
uncompress();
|
||||
uncompress(&strm, stdin, "(stdin)");
|
||||
} else {
|
||||
filename = argv[optind];
|
||||
file = fopen(filename, "rb");
|
||||
FILE *file = fopen(argv[optind], "rb");
|
||||
if (file == NULL) {
|
||||
fprintf(stderr, "%s: %s: %s\n",
|
||||
argv0, filename,
|
||||
argv0, argv[optind],
|
||||
strerror(errno));
|
||||
exit(ERROR);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
uncompress();
|
||||
uncompress(&strm, file, argv[optind]);
|
||||
fclose(file);
|
||||
}
|
||||
} while (++optind < argc);
|
||||
@ -488,5 +445,5 @@ main(int argc, char **argv)
|
||||
lzma_end(&strm);
|
||||
#endif
|
||||
|
||||
return exit_status;
|
||||
my_exit();
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user