102 строки
2.2 KiB
C
102 строки
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <errno.h>
|
|
#include <lzma.h>
|
|
#include <stdio.h>
|
|
#include <linux/compiler.h>
|
|
#include "compress.h"
|
|
#include "util.h"
|
|
#include "debug.h"
|
|
|
|
#define BUFSIZE 8192
|
|
|
|
static const char *lzma_strerror(lzma_ret ret)
|
|
{
|
|
switch ((int) ret) {
|
|
case LZMA_MEM_ERROR:
|
|
return "Memory allocation failed";
|
|
case LZMA_OPTIONS_ERROR:
|
|
return "Unsupported decompressor flags";
|
|
case LZMA_FORMAT_ERROR:
|
|
return "The input is not in the .xz format";
|
|
case LZMA_DATA_ERROR:
|
|
return "Compressed file is corrupt";
|
|
case LZMA_BUF_ERROR:
|
|
return "Compressed file is truncated or otherwise corrupt";
|
|
default:
|
|
return "Unknown error, possibly a bug";
|
|
}
|
|
}
|
|
|
|
int lzma_decompress_to_file(const char *input, int output_fd)
|
|
{
|
|
lzma_action action = LZMA_RUN;
|
|
lzma_stream strm = LZMA_STREAM_INIT;
|
|
lzma_ret ret;
|
|
int err = -1;
|
|
|
|
u8 buf_in[BUFSIZE];
|
|
u8 buf_out[BUFSIZE];
|
|
FILE *infile;
|
|
|
|
infile = fopen(input, "rb");
|
|
if (!infile) {
|
|
pr_err("lzma: fopen failed on %s: '%s'\n",
|
|
input, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
ret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED);
|
|
if (ret != LZMA_OK) {
|
|
pr_err("lzma: lzma_stream_decoder failed %s (%d)\n",
|
|
lzma_strerror(ret), ret);
|
|
goto err_fclose;
|
|
}
|
|
|
|
strm.next_in = NULL;
|
|
strm.avail_in = 0;
|
|
strm.next_out = buf_out;
|
|
strm.avail_out = sizeof(buf_out);
|
|
|
|
while (1) {
|
|
if (strm.avail_in == 0 && !feof(infile)) {
|
|
strm.next_in = buf_in;
|
|
strm.avail_in = fread(buf_in, 1, sizeof(buf_in), infile);
|
|
|
|
if (ferror(infile)) {
|
|
pr_err("lzma: read error: %s\n", strerror(errno));
|
|
goto err_fclose;
|
|
}
|
|
|
|
if (feof(infile))
|
|
action = LZMA_FINISH;
|
|
}
|
|
|
|
ret = lzma_code(&strm, action);
|
|
|
|
if (strm.avail_out == 0 || ret == LZMA_STREAM_END) {
|
|
ssize_t write_size = sizeof(buf_out) - strm.avail_out;
|
|
|
|
if (writen(output_fd, buf_out, write_size) != write_size) {
|
|
pr_err("lzma: write error: %s\n", strerror(errno));
|
|
goto err_fclose;
|
|
}
|
|
|
|
strm.next_out = buf_out;
|
|
strm.avail_out = sizeof(buf_out);
|
|
}
|
|
|
|
if (ret != LZMA_OK) {
|
|
if (ret == LZMA_STREAM_END)
|
|
break;
|
|
|
|
pr_err("lzma: failed %s\n", lzma_strerror(ret));
|
|
goto err_fclose;
|
|
}
|
|
}
|
|
|
|
err = 0;
|
|
err_fclose:
|
|
fclose(infile);
|
|
return err;
|
|
}
|