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-rw-r--r--tools/perf/util/trace-event-read.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 1b5c847..342dfdd 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -458,9 +458,8 @@ struct record *trace_read_data(int cpu)
return data;
}
-void trace_report(void)
+void trace_report(int fd)
{
- const char *input_file = "trace.info";
char buf[BUFSIZ];
char test[] = { 23, 8, 68 };
char *version;
@@ -468,17 +467,15 @@ void trace_report(void)
int show_funcs = 0;
int show_printk = 0;
- input_fd = open(input_file, O_RDONLY);
- if (input_fd < 0)
- die("opening '%s'\n", input_file);
+ input_fd = fd;
read_or_die(buf, 3);
if (memcmp(buf, test, 3) != 0)
- die("not an trace data file");
+ die("no trace data in the file");
read_or_die(buf, 7);
if (memcmp(buf, "tracing", 7) != 0)
- die("not a trace file (missing tracing)");
+ die("not a trace file (missing 'tracing' tag)");
version = read_string();
if (show_version)
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