获取硬盘大小和使用情况

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <mntent.h>
#include <sys/statfs.h>
#include <string.h>
int get_blk_size(unsigned int *blksize,unsigned int *blkuse){
        unsigned int blkfree = 0;
        FILE *fp = fopen("/etc/mtab","rb");
        if (NULL == fp){
                return 0;
        }
        while(1){
                struct mntent *mt = getmntent(fp);
                if(NULL==mt){
                        break;
                }
                printf("fs_name:[%s]\n",mt->mnt_fsname);
                if (NULL != strstr(mt->mnt_fsname,"/dev/")){
                        struct statfs buf;
//                      printf("fsname:[%s]\n",mt->mnt_fsname);
                        statfs(mt->mnt_dir,&buf);
                        *blksize+= (buf.f_bsize/1024*buf.f_blocks);
                        blkfree+=(buf.f_bsize/1024*buf.f_bfree);
                }
        }
        *blkuse = *blksize - blkfree;
        fclose(fp);
        return 0;
}
int main(){
        int blksize =0 ;
        int blkuse = 0;
        get_blk_size(&blksize,&blkuse)  ;
        printf("blk_size:[%d] blkuse:[%d]\n",blksize,blkuse);
        return 0;
}