In C get hard drive free space from device name

Question

In order to have stats on a hardrive one can use the sys/statvfs

It takes either a path or a fd.

int statvfs(const char *path, struct statvfs *buf);
int fstatvfs(int fd, struct statvfs *buf);

In my application I am parsing /proc/diskstats which provide me with the device name (ex: sda1, sda2).

I don't know how to use that device name in order to get the same stats as the statvfs functions. What functions can be used?

Answer 1

读取/etc/mtab并映射设备名称以安装路径。

Answer 2

To connect a device with where its mounted, look at mount . The source for mount should tell you how to find the path each device is mounted on. Then you can open the path and call statvfs