linux c获取磁盘空间

#include <stdio.h>
#include <sys/statvfs.h>

void get_disk_space(const char *path) {
    struct statvfs buf;

    if (statvfs(path, &buf) == 0) {
        unsigned long long total_space = buf.f_blocks * buf.f_frsize;
        unsigned long long free_space = buf.f_bfree * buf.f_frsize;
        unsigned long long available_space = buf.f_bavail * buf.f_frsize;

        printf("Total space: %llu bytes\n", total_space);
        printf("Free space: %llu bytes\n", free_space);
        printf("Available space: %llu bytes\n", available_space);
    } else {
        perror("statvfs");
    }
}

int main() {
    get_disk_space("/");
    return 0;
}

gcc -o disk_space disk_space.c
./disk_space