runtime/tools/blink.c

   1 /*
   2  * An extremely simple program to make the cursor blink in an xterm.
   3  * This is useful when the cursor is hard to spot in a highlighted file.
   4  * Start in the background: "blink&"  Stop by killing it.
   5  * Bram Moolenaar  980109  (based on an idea from John Lange).
   6  */
   7
   8 #include <stdio.h>
   9
  10 main()
  11 {
  12         while (1)
  13         {
  14                 printf("\e[?25h");
  15                 fflush(stdout);
  16                 usleep(400000);         /* on time */
  17                 printf("\e[?25l");
  18                 fflush(stdout);
  19                 usleep(250000);         /* off time */
  20         }
  21 }