1 static char *sccsid = "@(#)sleep.c 4.1 (Berkeley) 10/01/80"; 2 main(argc, argv) 3 char **argv; 4 { 5 int c, n; 6 char *s; 7 8 n = 0; 9 if(argc < 2) { 10 printf("arg count\n"); 11 exit(0); 12 } 13 s = argv[1]; 14 while(c = *s++) { 15 if(c<'0' || c>'9') { 16 printf("bad character\n"); 17 exit(0); 18 } 19 n = n*10 + c - '0'; 20 } 21 sleep(n); 22 } 23