| #include <stdio.h> | |
| #include <stdlib.h> | |
| int main(int argc, char *argv[]) | |
| { | |
| unsigned long s; | |
| char *p; | |
| if (argc != 2) | |
| goto err; | |
| s = strtoul(argv[1], &p, 10); | |
| if ( *p ) | |
| goto err; | |
| sleep(s); | |
| return 0; | |
| err: | |
| fprintf(stderr, "Usage: %s seconds\n", argv[0]); | |
| return 1; | |
| } |