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文件系统层面的可用块数量可用空间和比例

news 2025/8/23 7:34:17

statfs、fstatfs - 获取文件系统统计信息

#include <stdio.h>
#include <sys/vfs.h>  // 包含statfs所需的头文件
#include <errno.h>
#include <string.h>int main(int argc, char *argv[])
{struct statfs fs_info;const char *path;double available_ratio, used_ratio;unsigned long long total_space, available_space, used_space;// 如果没有提供路径参数，使用当前目录if (argc < 2) {path = ".";} else {path = argv[1];}// 调用statfs获取文件系统信息if (statfs(path, &fs_info) == -1)		{fprintf(stderr, "获取文件系统信息失败: %s\n", strerror(errno));return 1;}if(statfs(path,&fs_info) == -1){fprintf(stderr, "获取文件系统信息失败: %s\n", strerror(errno));return 1;}total_space = (unsigned long long)fs_info.f_blocks * fs_info.f_bsize;available_space = (unsigned long long)fs_info.f_bavail * fs_info.f_bsize;used_space = total_space - (unsigned long long)fs_info.f_bfree * fs_info.f_bsize;available_ratio = (double)available_space / total_space * 100;used_ratio = (double)used_space / total_space * 100;// 打印文件系统信息printf("文件系统信息 - 路径: %s\n", path);printf("----------------------------------------\n");printf("文件系统类型: %ld\n", fs_info.f_type);printf("最佳I/O块大小: %ld 字节\n", fs_info.f_bsize);printf("总块数: %ld\n", fs_info.f_blocks);printf("空闲块数: %ld\n", fs_info.f_bfree);printf("可用块数(非root): %ld\n", fs_info.f_bavail);printf("总容量: %.2f GB\n", (double)fs_info.f_blocks * fs_info.f_bsize / (1024 * 1024 * 1024));printf("可用容量: %.2f GB\n", (double)fs_info.f_bavail * fs_info.f_bsize / (1024 * 1024 * 1024));printf("最大文件名长度: %ld 字符\n", fs_info.f_namelen);printf("使用空间比例%.2f%%\n",used_ratio);printf(" 可用空间比例%.2f%%\n", available_ratio);printf(" 空闲比例%.2f%%\n", (double)fs_info.f_bfree/fs_info.f_blocks*100);return 0;
}