sys/src/cmd/sleep.c

   1 #include <u.h>
   2 #include <libc.h>
   3
   4 void
   5 main(int argc, char *argv[])
   6 {
   7         long n;
   8         char *p, *q;
   9
  10         if(argc>1){
  11                 for(n = strtol(argv[1], &p, 0); n > 0; n--)
  12                         sleep(1000);
  13                 /*
  14                  * no floating point because it is useful to
  15                  * be able to run sleep when bootstrapping
  16                  * a machine.
  17                  */
  18                 if(*p++ == '.' && (n = strtol(p, &q, 10)) > 0){
  19                         switch(q - p){
  20                         case 0:
  21                                 break;
  22                         case 1:
  23                                 n *= 100;
  24                                 break;
  25                         case 2:
  26                                 n *= 10;
  27                                 break;
  28                         default:
  29                                 p[3] = 0;
  30                                 n = strtol(p, 0, 10);
  31                                 break;
  32                         }
  33                         sleep(n);
  34                 }
  35         }
  36         exits(0);
  37 }