linux/tools/perf/util/lzma.c
Arnaldo Carvalho de Melo fb71c86cc8 perf tools: Remove util.h from where it is not needed
Check that it is not needed and remove, fixing up some fallout for
places where it was only serving to get something else.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-9h6dg6lsqe2usyqjh5rrues4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-09-20 09:19:20 -03:00

123 lines
2.6 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <lzma.h>
#include <stdio.h>
#include <linux/compiler.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "compress.h"
#include "debug.h"
#include <string.h>
#include <unistd.h>
#include <internal/lib.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;
}
bool lzma_is_compressed(const char *input)
{
int fd = open(input, O_RDONLY);
const uint8_t magic[6] = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
char buf[6] = { 0 };
ssize_t rc;
if (fd < 0)
return -1;
rc = read(fd, buf, sizeof(buf));
close(fd);
return rc == sizeof(buf) ?
memcmp(buf, magic, sizeof(buf)) == 0 : false;
}