ref: 520d698c3e9ec8f76923965481aa15862f9f3c81
dir: /sys/src/cmd/sleep.c/
#include <u.h> #include <libc.h> void main(int argc, char *argv[]) { enum { MAXSEC = 0x7ffffc00/1000 }; long n, m; char *p, *q; if(argc>1){ for(n = strtol(argv[1], &p, 0); n > MAXSEC; n -= MAXSEC) sleep(MAXSEC*1000); /* * no floating point because it is useful to * be able to run sleep when bootstrapping * a machine. */ if(*p++ == '.' && (m = strtol(p, &q, 10)) > 0){ switch(q - p){ case 0: break; case 1: m *= 100; break; case 2: m *= 10; break; default: p[3] = 0; m = strtol(p, 0, 10); break; } } else { m = 0; } m += n*1000; if(m > 0) sleep(m); } exits(0); }