utime.c

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#include "lib.h"
#include <sys/types.h>
#include <time.h>
#include <utime.h>
#include <errno.h>
#include <stdlib.h>
#include "sys9.h"
#include "dir.h"

int
utime(const char *path, const struct utimbuf *times)
{
	int n;
	Dir nd;
	time_t curt;

	_nulldir(&nd);
	if(times == 0) {
		curt = time(0);
		nd.atime = curt;
		nd.mtime = curt;
	} else {
		nd.atime = times->actime;
		nd.mtime = times->modtime;
	}
	n = _dirwstat(path, &nd);
	if(n < 0)
		_syserrno();
	return n;
}