diff mbox

[v16,07/16] perf, tools: Query terminal width and use in perf list

Message ID 1440569166-22169-8-git-send-email-sukadev@linux.vnet.ibm.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Sukadev Bhattiprolu Aug. 26, 2015, 6:05 a.m. UTC 
From: Andi Kleen <ak@linux.intel.com>

Automatically adapt the now wider and word wrapped perf list
output to wider terminals. This requires querying the terminal
before the auto pager takes over, and exporting this
information from the pager subsystem.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
---
 tools/perf/util/cache.h |    1 +
 tools/perf/util/pager.c |   15 +++++++++++++++
 tools/perf/util/pmu.c   |    3 ++-
 3 files changed, 18 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index c861373..8e0d4b8 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -32,6 +32,7 @@  extern const char *perf_config_dirname(const char *, const char *);
 extern void setup_pager(void);
 extern int pager_in_use(void);
 extern int pager_use_color;
+int pager_get_columns(void);
 
 char *alias_lookup(const char *alias);
 int split_cmdline(char *cmdline, const char ***argv);
diff --git a/tools/perf/util/pager.c b/tools/perf/util/pager.c
index 53ef006..1770c88 100644
--- a/tools/perf/util/pager.c
+++ b/tools/perf/util/pager.c
@@ -1,6 +1,7 @@ 
 #include "cache.h"
 #include "run-command.h"
 #include "sigchain.h"
+#include <sys/ioctl.h>
 
 /*
  * This is split up from the rest of git so that we can do
@@ -8,6 +9,7 @@ 
  */
 
 static int spawned_pager;
+static int pager_columns;
 
 static void pager_preexec(void)
 {
@@ -47,9 +49,12 @@  static void wait_for_pager_signal(int signo)
 void setup_pager(void)
 {
 	const char *pager = getenv("PERF_PAGER");
+	struct winsize sz;
 
 	if (!isatty(1))
 		return;
+	if (ioctl(1, TIOCGWINSZ, &sz) == 0)
+		pager_columns = sz.ws_col;
 	if (!pager)
 		pager = getenv("PAGER");
 	if (!(pager || access("/usr/bin/pager", X_OK)))
@@ -93,3 +98,13 @@  int pager_in_use(void)
 	env = getenv("PERF_PAGER_IN_USE");
 	return env ? perf_config_bool("PERF_PAGER_IN_USE", env) : 0;
 }
+
+int pager_get_columns(void)
+{
+	char *s;
+
+	s = getenv("COLUMNS");
+	if (s)
+		return atoi(s);
+	return (pager_columns ? pager_columns : 80) - 2;
+}
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index cb0396e..0f10fa3 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -14,6 +14,7 @@ 
 #include "cpumap.h"
 #include "header.h"
 #include "pmu-events/pmu-events.h"
+#include "cache.h"
 
 struct perf_pmu_format {
 	char *name;
@@ -1079,7 +1080,7 @@  void print_pmu_events(const char *event_glob, bool name_only)
 	int len, j;
 	struct pair *aliases;
 	int numdesc = 0;
-	int columns = 78;
+	int columns = pager_get_columns();
 
 	pmu = NULL;
 	len = 0;