Linux C++ 获取磁盘 大小 格式 信息

CDiskInfo.h

/*
 * 	CDiskInfo.h
 *
 *  Created on: 2014-3-12
 *  Author: qinyinghao
 *  用于获取磁盘 信息
 */

#ifndef CDISKINFO_H_
#define CDISKINFO_H_
#include 
namespace qyh
{

/*
 * 文件系统很多，列表如下
 ADFS_SUPER_MAGIC      0xadf5
 AFFS_SUPER_MAGIC      0xADFF
 BEFS_SUPER_MAGIC      0x42465331
 BFS_MAGIC             0x1BADFACE
 CIFS_MAGIC_NUMBER     0xFF534D42
 CODA_SUPER_MAGIC      0x73757245
 COH_SUPER_MAGIC       0x012FF7B7
 CRAMFS_MAGIC          0x28cd3d45
 DEVFS_SUPER_MAGIC     0x1373
 EFS_SUPER_MAGIC       0x00414A53
 EXT_SUPER_MAGIC       0x137D
 EXT2_OLD_SUPER_MAGIC 0xEF51
 EXT2_SUPER_MAGIC      0xEF53
 EXT3_SUPER_MAGIC      0xEF53
 HFS_SUPER_MAGIC       0x4244
 HPFS_SUPER_MAGIC      0xF995E849
 HUGETLBFS_MAGIC       0x958458f6
 ISOFS_SUPER_MAGIC     0x9660
 JFFS2_SUPER_MAGIC     0x72b6
 JFS_SUPER_MAGIC       0x3153464a
 MINIX_SUPER_MAGIC     0x137F
 MINIX_SUPER_MAGIC2    0x138F
 MINIX2_SUPER_MAGIC    0x2468
 MINIX2_SUPER_MAGIC2   0x2478
 MSDOS_SUPER_MAGIC     0x4d44
 NCP_SUPER_MAGIC       0x564c
 NFS_SUPER_MAGIC       0x6969
 NTFS_SB_MAGIC         0x5346544e
 OPENPROM_SUPER_MAGIC 0x9fa1
 PROC_SUPER_MAGIC      0x9fa0
 QNX4_SUPER_MAGIC      0x002f
 REISERFS_SUPER_MAGIC 0x52654973
 ROMFS_MAGIC           0x7275
 SMB_SUPER_MAGIC       0x517B
 SYSV2_SUPER_MAGIC     0x012FF7B6
 SYSV4_SUPER_MAGIC     0x012FF7B5
 TMPFS_MAGIC           0x01021994
 UDF_SUPER_MAGIC       0x15013346
 UFS_MAGIC             0x00011954
 USBDEVICE_SUPER_MAGIC 0x9fa2
 VXFS_SUPER_MAGIC      0xa501FCF5
 XENIX_SUPER_MAGIC     0x012FF7B4
 XFS_SUPER_MAGIC       0x58465342
 _XIAFS_SUPER_MAGIC    0x012FD16D
 */

typedef enum
{
	DISK_FORMAT_FAT, DISK_FORMAT_NTFS, DISK_FORMAT_EXT2, DISK_FORMAT_UNKNOW//其他省略
} DISK_FORMAT;

class CDiskInfo
{
public:

	/*
	 * 设置磁盘目录
	 */
	CDiskInfo(const std::string& _path = "/data/");

	virtual ~CDiskInfo();

	/*
	 * 刷新磁盘信息
	 * 当磁盘信息发生改变是应当刷新后再获取
	 */
	void refreshInfo();

	/*
	 * 获取磁盘总大小
	 * 单位为B
	 */
	long long getTotalSize();

	/*
	 * 获取磁盘已使用大小
	 * 单位为B
	 */
	long long getUsedSize();

	/*
	 * 获取磁盘已使用大小
	 * 单位为B
	 */
	long long getLeftSize();

	/*
	 * 获取磁盘文件系统
	 */
	DISK_FORMAT getDiskFormat();

private:
	long long disk_total_capacity;
	long long disk_used_capacity;
	long long disk_free_capacity;
	DISK_FORMAT disk_format;
	std::string path;
};

} /* namespace qyh */
#endif /* CDISKINFO_H_ */

CDiskInfo.cpp

/*
 *  CDiskInfo.cpp
 *
 *  Created on: 2014-3-12
 *  Author: qinyinghao
 */

#include "CDiskInfo.h"
extern "C" {
#include 
}
#include 
namespace qyh {

CDiskInfo::CDiskInfo(const std::string& _path) :
		disk_total_capacity(0), disk_used_capacity(0), disk_free_capacity(0), disk_format(
				DISK_FORMAT_UNKNOW), path(_path) {
	struct statfs buf;
	int i = statfs(path.c_str(), &buf);
	if (i < 0) {
		//printf("get disk infomation faild\n");
	} else {
		switch (buf.f_type) {
		case 0x4d44:
			disk_format = DISK_FORMAT_FAT;
			break;
		case 0x5346544e:
		case 0X65735546:
			disk_format = DISK_FORMAT_NTFS;
			break;
		case 0xEF53:
		case 0xEF51:
			disk_format = DISK_FORMAT_EXT2;
			break;
		default:
			disk_format = DISK_FORMAT_UNKNOW;
			break;
		}
		disk_total_capacity = (((long long) buf.f_bsize
				* (long long) buf.f_blocks) );
		disk_free_capacity =
				(((long long) buf.f_bsize * (long long) buf.f_bfree));
		disk_used_capacity = disk_total_capacity - disk_free_capacity;
	}
}

CDiskInfo::~CDiskInfo() {
}

void CDiskInfo::refreshInfo() {
	struct statfs buf;
	int i = statfs(path.c_str(), &buf);
	if (i < 0) {
		//printf("refresh get disk infomation faild\n");
		return;
	}
	switch (buf.f_type) {
	case 0x4d44:
		disk_format = DISK_FORMAT_FAT;
		break;
	case 0x5346544e:
	case 0X65735546:
		disk_format = DISK_FORMAT_NTFS;
		break;
	case 0xEF53:
	case 0xEF51:
		disk_format = DISK_FORMAT_EXT2;
		break;
	default:
		disk_format = DISK_FORMAT_UNKNOW;
		break;
	}
	disk_total_capacity = (((long long) buf.f_bsize * (long long) buf.f_blocks));
	disk_free_capacity = (((long long) buf.f_bsize * (long long) buf.f_bfree));
	disk_used_capacity = disk_total_capacity - disk_free_capacity;
}
long long CDiskInfo::getTotalSize() {
	return disk_total_capacity;
}
long long CDiskInfo::getUsedSize() {
	return disk_used_capacity;
}
long long CDiskInfo::getLeftSize() {
	return disk_free_capacity;
}
DISK_FORMAT CDiskInfo::getDiskFormat() {
	return disk_format;
}
} /* namespace qyh */