tools/perf/util/term.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "term.h"
   3 #include <stdlib.h>
   4 #include <termios.h>
   5 #include <unistd.h>
   6 #include <sys/ioctl.h>
   7
   8 void get_term_dimensions(struct winsize *ws)
   9 {
  10         char *s = getenv("LINES");
  11
  12         if (s != NULL) {
  13                 ws->ws_row = atoi(s);
  14                 s = getenv("COLUMNS");
  15                 if (s != NULL) {
  16                         ws->ws_col = atoi(s);
  17                         if (ws->ws_row && ws->ws_col)
  18                                 return;
  19                 }
  20         }
  21 #ifdef TIOCGWINSZ
  22         if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
  23             ws->ws_row && ws->ws_col)
  24                 return;
  25 #endif
  26         ws->ws_row = 25;
  27         ws->ws_col = 80;
  28 }
  29
  30 void set_term_quiet_input(struct termios *old)
  31 {
  32         struct termios tc;
  33
  34         tcgetattr(0, old);
  35         tc = *old;
  36         tc.c_lflag &= ~(ICANON | ECHO);
  37         tc.c_cc[VMIN] = 0;
  38         tc.c_cc[VTIME] = 0;
  39         tcsetattr(0, TCSANOW, &tc);
  40 }