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Commit 4b57fd44 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add lzma_is_compressed function 



Add implementation of the is_compressed callback for lzma.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-12-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8b42b7e5

tools/perf/util/lzma.c

+17 −2
Original line number Diff line number Diff line
@@ -3,9 +3,13 @@ 
#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 "util.h"

#include "debug.h"

#include <unistd.h>



#define BUFSIZE 8192
@@ -100,7 +104,18 @@ int lzma_decompress_to_file(const char *input, int output_fd) 
	return err;

}



bool lzma_is_compressed(const char *input __maybe_unused)

bool lzma_is_compressed(const char *input)

{

	return true;

	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;

}