setterm: add set_blanking() action

This make over long perform_sequence() function a little bit shorter.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/term-utils/setterm.c b/term-utils/setterm.c
index d2fb596a0cf1bda9a68e7bad2ae6c6ede294a6ff..a1316137947a630256b84c2e07bdfc31ebe81c62 100644 (file)
--- a/term-utils/setterm.c
+++ b/term-utils/setterm.c
@@ -733,6 +733,40 @@ static int open_snapshot_device(struct setterm_control *ctl)
        return fd;
 }
 
+static void set_blanking(struct setterm_control *ctl)
+{
+       char ioctlarg;
+       int ret;
+
+       if (0 <= ctl->opt_bl_min) {
+               printf("\033[9;%d]", ctl->opt_bl_min);
+               return;
+       }
+       switch (ctl->opt_bl_min) {
+       case BLANKSCREEN:
+               ioctlarg = TIOCL_BLANKSCREEN;
+               if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
+                       warn(_("cannot force blank"));
+               break;
+       case UNBLANKSCREEN:
+               ioctlarg = TIOCL_UNBLANKSCREEN;
+               if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
+                       warn(_("cannot force unblank"));
+               break;
+       case BLANKEDSCREEN:
+               ioctlarg = TIOCL_BLANKEDSCREEN;
+               ret = ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg);
+               if (ret < 0)
+                       warn(_("cannot get blank status"));
+               else
+                       printf("%d\n", ret);
+               break;
+       default:                /* should be impossible to reach */
+               abort();
+       }
+       return;
+}
+
 static void screendump(struct setterm_control *ctl)
 {
        unsigned char header[4];
@@ -960,27 +994,8 @@ static void perform_sequence(struct setterm_control *ctl)
        }
 
        /* -blank [0-60]. */
-       if (ctl->opt_blank && vc_only(ctl, "--blank")) {
-               if (ctl->opt_bl_min >= 0)
-                       printf("\033[9;%d]", ctl->opt_bl_min);
-               else if (ctl->opt_bl_min == BLANKSCREEN) {
-                       char ioctlarg = TIOCL_BLANKSCREEN;
-                       if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
-                               warn(_("cannot force blank"));
-               } else if (ctl->opt_bl_min == UNBLANKSCREEN) {
-                       char ioctlarg = TIOCL_UNBLANKSCREEN;
-                       if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
-                               warn(_("cannot force unblank"));
-               } else if (ctl->opt_bl_min == BLANKEDSCREEN) {
-                       char ioctlarg = TIOCL_BLANKEDSCREEN;
-                       int ret;
-                       ret = ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg);
-                       if (ret < 0)
-                               warn(_("cannot get blank status"));
-                       else
-                               printf("%d\n", ret);
-               }
-       }
+       if (ctl->opt_blank && vc_only(ctl, "--blank"))
+               set_blanking(ctl);
 
        /* -powersave [on|vsync|hsync|powerdown|off] (console) */
        if (ctl->opt_powersave) {