From 6dc1ae8f9bee176d953274d7501eaf898746f6c0 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 12 Apr 2017 17:36:01 +0200
Subject: exit on key press

---
 drmtest.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 2 deletions(-)

diff --git a/drmtest.c b/drmtest.c
index 3f78b4c..d422475 100644
--- a/drmtest.c
+++ b/drmtest.c
@@ -7,9 +7,12 @@
 #include <string.h>
 #include <inttypes.h>
 #include <getopt.h>
+#include <time.h>
+#include <termios.h>
 
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/time.h>
 
 #include <xf86drm.h>
 #include <xf86drmMode.h>
@@ -346,6 +349,47 @@ static void drm_make_egl_fb(void)
 
 /* ------------------------------------------------------------------ */
 
+struct termios  saved_attributes;
+int             saved_fl;
+
+void tty_raw(void)
+{
+    struct termios tattr;
+
+    fcntl(STDIN_FILENO, F_GETFL, &saved_fl);
+    tcgetattr (0, &saved_attributes);
+
+    fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
+    memcpy(&tattr,&saved_attributes,sizeof(struct termios));
+    tattr.c_lflag &= ~(ICANON|ECHO);
+    tattr.c_cc[VMIN] = 1;
+    tattr.c_cc[VTIME] = 0;
+    tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
+}
+
+void tty_restore(void)
+{
+    fcntl(STDIN_FILENO, F_SETFL, saved_fl);
+    tcsetattr(STDIN_FILENO, TCSANOW, &saved_attributes);
+}
+
+int kbd_wait(int timeout)
+{
+    struct timeval limit;
+    fd_set set;
+    int rc;
+
+    FD_ZERO(&set);
+    FD_SET(STDIN_FILENO, &set);
+    limit.tv_sec = timeout;
+    limit.tv_usec = 0;
+    rc = select(STDIN_FILENO + 1, &set, NULL, NULL,
+                timeout ? &limit : NULL);
+    return rc;
+}
+
+/* ------------------------------------------------------------------ */
+
 static void usage(FILE *fp)
 {
     fprintf(fp,
@@ -367,7 +411,7 @@ static void usage(FILE *fp)
 int main(int argc, char **argv)
 {
     int card = 0;
-    int secs = 3;
+    int secs = 60;
     bool gl = false;
     char *output = NULL;
     int c;
@@ -415,7 +459,11 @@ int main(int argc, char **argv)
         drm_draw_dumb_fb();
     }
     drm_show_fb();
-    sleep(secs);
+
+    tty_raw();
+    kbd_wait(secs);
+    tty_restore();
+
     drm_fini_dev();
     return 0;
 }
-- 
cgit