linux-kernel - [RFC v2][PATCH 03/11] perf report: introduce special handling for pipe input

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Date:	Thu,  1 Apr 2010 23:59:17 -0500
From:	Tom Zanussi <tzanussi@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, fweisbec@...il.com, rostedt@...dmis.org,
	k-keiichi@...jp.nec.com, acme@...stprotocols.net
Subject: [RFC v2][PATCH 03/11] perf report: introduce special handling for pipe input

Adds special treatment for stdin - if the user specifies '-i -' to
perf report, the intent is that the event stream be written to 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@...il.com>
---
 tools/perf/builtin-report.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 6ab1698..a104121 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -267,6 +267,13 @@ static struct perf_event_ops event_ops = {
 	.read	= process_read_event,
 };
 
+extern volatile int session_done;
+
+static void sig_handler(int sig __attribute__((__unused__)))
+{
+	session_done = 1;
+}
+
 static int __cmd_report(void)
 {
 	int ret = -EINVAL;
@@ -274,6 +281,8 @@ static int __cmd_report(void)
 	struct rb_node *next;
 	const char *help = "For a higher level overview, try: perf report --sort comm,dso";
 
+	signal(SIGINT, sig_handler);
+
 	session = perf_session__new(input_name, O_RDONLY, force);
 	if (session == NULL)
 		return -ENOMEM;
@@ -461,7 +470,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
 {
 	argc = parse_options(argc, argv, options, report_usage, 0);
 
-	setup_browser();
+	if (strcmp(input_name, "-") != 0)
+		setup_browser();
 
 	if (symbol__init() < 0)
 		return -1;
-- 
1.6.4.GIT

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