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perf tools: Introduce set_term_quiet_input helper function

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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>
This commit is contained in:
Jiri Olsa 2014-08-11 10:50:02 +02:00 committed by Arnaldo Carvalho de Melo
parent ae256fa271
commit 9398c484f8
3 changed files with 17 additions and 8 deletions
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10
tools/perf/builtin-top.c
View file

@ -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);

13
tools/perf/util/util.c
View file

@ -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",

2
tools/perf/util/util.h
View file

@ -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;