perf tools: Introduce set_term_quiet_input helper function

Adding set_term_quiet_input helper to set the terminal quiet, out from
'perf top', used in following patches in 'perf kvm'.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1407747014-18394-9-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 10fc7e8..e8459e2 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -580,20 +580,14 @@ static void *display_thread_tui(void *arg)
 static void *display_thread(void *arg)
 {
        struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
-       struct termios tc, save;
+       struct termios save;
        struct perf_top *top = arg;
        int delay_msecs, c;
 
-       tcgetattr(0, &save);
-       tc = save;
-       tc.c_lflag &= ~(ICANON | ECHO);
-       tc.c_cc[VMIN] = 0;
-       tc.c_cc[VTIME] = 0;
-
        pthread__unblock_sigwinch();
 repeat:
        delay_msecs = top->delay_secs * 1000;
-       tcsetattr(0, TCSANOW, &tc);
+       set_term_quiet_input(&save);
        /* trash return*/
        getc(stdin);
 

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index b82a93c..25822bd 100644 (file)
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -13,6 +13,7 @@
 #include <limits.h>
 #include <byteswap.h>
 #include <linux/kernel.h>
+#include <unistd.h>
 
 /*
  * XXX We need to find a better place for these things...
@@ -282,6 +283,18 @@ void get_term_dimensions(struct winsize *ws)
        ws->ws_col = 80;
 }
 
+void set_term_quiet_input(struct termios *old)
+{
+       struct termios tc;
+
+       tcgetattr(0, old);
+       tc = *old;
+       tc.c_lflag &= ~(ICANON | ECHO);
+       tc.c_cc[VMIN] = 0;
+       tc.c_cc[VTIME] = 0;
+       tcsetattr(0, TCSANOW, &tc);
+}
+
 static void set_tracing_events_path(const char *mountpoint)
 {
        snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",

diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 03a1ea2..d6a79b1 100644 (file)
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -75,6 +75,7 @@
 #include <api/fs/debugfs.h>
 #include <termios.h>
 #include <linux/bitops.h>
+#include <termios.h>
 
 extern const char *graph_line;
 extern const char *graph_dotted_line;
@@ -308,6 +309,7 @@ extern unsigned int page_size;
 extern int cacheline_size;
 
 void get_term_dimensions(struct winsize *ws);
+void set_term_quiet_input(struct termios *old);
 
 struct parse_tag {
        char tag;