Get Partition Size

GetPartitionSize.c

#include <stdio.h>
#include <sys/vfs.h>
#include <string.h>
#include <errno.h>

int main(int argc, const char *argv[])
{
    if(argc < 2){
        printf("%s PATH\n", *argv);
        return 0;
    }
    const char *path = argv[1];
    struct statfs buf;
    int ret = statfs(path, &buf);
    if(ret){
        printf("Failed to stat fs, %s\n", strerror(errno));
    }
    else{
        long long blocks, bsize, bfree;
        blocks = buf.f_blocks;
        bsize = buf.f_bsize;
        bfree = buf.f_bfree;
        printf("f_type: %4x\n", buf.f_type);
        printf("f_bsize: %4x\n", buf.f_bsize);
        printf("f_blocks: %lld %.2fGB\n", (long long)buf.f_blocks, ((double)(blocks*bsize)/(1024*1024*1024)));
        printf("f_bfree: %lld %.2fGB\n", (long long)buf.f_bfree, ((double)(bfree*bsize)/(1024*1024*1024)));
    }
    return 0;
}