Commit c239da3b authored Apr 01, 2010 by Tom Zanussi Committed by Ingo Molnar Apr 14, 2010

perf trace: Introduce special handling for pipe input



Adds special treatment for stdin - if the user specifies '-i -'
to perf trace, the intent is that the event stream be read from
stdin rather than from a disk file.

The actual handling of the '-' filename is done by the session;
this just adds a signal handler to stop reporting, and turns off
interference by the pager.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-5-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 46656ac7

tools/perf/builtin-trace.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -106,8 +106,17 @@ static struct perf_event_ops event_ops = {
		.comm = event__process_comm,
		};

		extern volatile int session_done;

		static void sig_handler(int sig __unused)
		{
		session_done = 1;
		}

		static int __cmd_trace(struct perf_session *session)
		{
		signal(SIGINT, sig_handler);

		return perf_session__process_events(session, &event_ops);
		}

		@@ -580,7 +589,8 @@ int cmd_trace(int argc, const char *argv, const char prefix __used)
		if (session == NULL)
		return -ENOMEM;

		if (!perf_session__has_traces(session, "record -R"))
		if (strcmp(input_name, "-") &&
		!perf_session__has_traces(session, "record -R"))
		return -EINVAL;

		if (generate_script_lang) {