/*  * 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 <libc.h> staticchar*skip(char *p){ 	while(*p == ' ')		p++;	while(*p != ' ' && *p != 0)		p++;	return p;} /* *  after a fork with fd's copied, both fd's are pointing to *  the same Chan structure.  Since the offset is kept in the Chan *  structure, the seek's and read's in the two processes can be *  are competing moving the offset around.  Hence the unusual loop *  in the middle of this routine. */longtimes(long *t){	char b[200], *p;	static int f = -1;	int i, retries;	ulong r; 	memset(b, 0, sizeof(b));	for(retries = 0; retries < 100; retries++){		if(f < 0)			f = open("/dev/cputime", OREAD|OCEXEC);		if(f < 0)			break;		if(seek(f, 0, 0) < 0 || (i = read(f, b, sizeof(b))) < 0){			close(f);			f = -1;		} else {			if(i != 0)				break;		}	}	p = b;	if(t)		t[0] = atol(p);	p = skip(p);	if(t)		t[1] = atol(p);	p = skip(p);	r = atol(p);	if(t){		p = skip(p);		t[2] = atol(p);		p = skip(p);		t[3] = atol(p);	}	return r;}