c++ - 统计不工作

Question

我正在编写一个文件观察器和统计器，由于某种原因无法获取文件信息，为什么？

struct stat info;
int fd = open(path, O_EVTONLY);
if (fd <= 0){
    exit(-1);
}
int result = fstat(fd, &info);
if (!result){
    exit(-1); //This happens! Errno says "No such file or directory" but that cant be because open would've failed
}

Answer 1

int result = fstat(fd, &info);
if (!result){
    exit(-1);
}

检查 fstat 手册页，成功返回 0。