coreutils/sleep.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5
   6 int getsuffix(char *val)
   7 {
   8     char c = val[strlen(val)-1];
   9     switch(c) {
  10         case 'd': return 86400; break;      /* Days */
  11         case 'h': return 3600; break;       /* Hours */
  12         case 'm': return 60; break;         /* Minutes */
  13         case 's': return 1; break;          /* Seconds */
  14         default:
  15             if(c >= '0' && c <= '9')
  16                 return 1;
  17             break;
  18     }
  19     return -1;
  20 }
  21
  22 int main(int argc, char **argv)
  23 {
  24     int i, mult;
  25     for(i = 1; i < argc; i++) {
  26         mult = getsuffix(argv[i]);
  27         if(mult > 0)
  28             sleep(atoi(argv[i]) * mult);
  29         else
  30             printf("%s: invalid time interval `%s'\n", argv[0], argv[i]);
  31     }
  32     return 0;
  33 }