diff options
| -rw-r--r-- | tools/perf/util/lzma.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c index 7032caaf75eb..b1dd29a9d915 100644 --- a/tools/perf/util/lzma.c +++ b/tools/perf/util/lzma.c @@ -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 @@ err_fclose: 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; } |