测试程序如下所示：
#include <stdio.h>
#include <sys/statfs.h>
#include <sys/vfs.h>
#include <errno.h>
int main(int argc, char *argv[])
{
struct statfs disk_info;
char *path = "/home/";
int ret = 0;
if (argc == 2)
{
path = argv[1];
}
if (ret == statfs(path, &disk_info) == -1)
{
fprintf(stderr, "Failed to get file disk infomation,
errno:%u, reason:%sn", errno, strerror(errno));
return -1;
}
long long total_size = disk_info.f_blocks * disk_info.f_bsize;
long long available_size = disk_info.f_bavail * disk_info.f_bsize;
long long free_size = disk_info.f_bfree * disk_info.f_bsize;
//输出每个块的长度，linux下内存块为4KB
printf("block size: %ld bytesn", disk_info.f_bsize);
//输出块个数
printf("total data blocks: %ld n", disk_info.f_blocks);
//输出path所在磁盘的大小
printf("total file disk size: %d MBn",total_size >> 20);
//输出非root用户可以用的磁盘空间大小
printf("avaiable size: %d MBn",available_size >> 20);
//输出硬盘的所有剩余空间
printf("free size: %d MBn",free_size >> 20);
//输出磁盘上文件节点个数
printf("total file nodes: %ldn", disk_info.f_files);
//输出可用文件节点个数
printf("free file nodes: %ldn", disk_info.f_ffree);
//输出文件名最大长度
printf("maxinum length of file name: %ldn", disk_info.f_namelen);
return 0;
}
测试结果如下所示：
