jehanne/sys/src/cmd/sleep.c

47 lines
965 B
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
void
main(int argc, char *argv[])
{
int32_t n;
char *p, *q;
if(argc>1){
for(n = strtol(argv[1], &p, 0); n > 0; n--)
sleep(1000);
/*
* no floating point because it is useful to
* be able to run sleep when bootstrapping
* a machine.
*/
if(*p++ == '.' && (n = strtol(p, &q, 10)) > 0){
switch(q - p){
case 0:
break;
case 1:
n *= 100;
break;
case 2:
n *= 10;
break;
default:
p[3] = 0;
n = strtol(p, 0, 10);
break;
}
sleep(n);
}
}
exits(0);
}