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

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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8b42b7e5
...@@ -3,9 +3,13 @@ ...@@ -3,9 +3,13 @@
#include <lzma.h> #include <lzma.h>
#include <stdio.h> #include <stdio.h>
#include <linux/compiler.h> #include <linux/compiler.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "compress.h" #include "compress.h"
#include "util.h" #include "util.h"
#include "debug.h" #include "debug.h"
#include <unistd.h>
#define BUFSIZE 8192 #define BUFSIZE 8192
...@@ -100,7 +104,18 @@ int lzma_decompress_to_file(const char *input, int output_fd) ...@@ -100,7 +104,18 @@ int lzma_decompress_to_file(const char *input, int output_fd)
return err; 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;
} }
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