Linux下使用C获得磁盘信息

/**  * @file statfs.c * @brief get disk infomation * @author T-bagwell@ChinaUnix.net * @date 2009-12-12 */#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/vfs.h>struct disk_infomation{    char disk_format[8];    char disk_total_capacity[11];    char disk_free_capacity[11];    char disk_permissions[3];};static int get_disk_infomation(const char *path, struct disk_infomation *di);static char *convert_size(float size, char *dest);static unsigned long kscale(unsigned long b, unsigned long bs) ;int main(int argc, char *argv[]){    struct disk_infomation *di=malloc(sizeof(struct disk_infomation));    char *path =(char *)malloc(20);        if(argc < 2)    {        printf("%s Mount point of the dir\n", argv[0]);        return 0;    }    strncpy(path, argv[1], strlen(argv[1]));    get_disk_infomation(path, di);    printf("DiskType:            %s\n", di->disk_format);    printf("DiskTotalCapacity    %s\n", di->disk_total_capacity);    printf("DiskFreeCapacity    %s\n", di->disk_free_capacity);    printf("DiskPermissions        %s\n", di->disk_permissions);    free(di);    free(path);    return 0;}/**  * @brief block to byte  * @param b     block * @param bs     KByte * @return         Kbyte */static unsigned long kscale(unsigned long b, unsigned long bs) {    return (b * (unsigned long long) bs + 1024/2) / 1024;}/**  * @brief get disk informations  * @param path     the disk mount point * @param di     the structure of the disk information * @return         success: 1, faild: 0 */static int get_disk_infomation(const char *path,                        struct disk_infomation *di){    struct statfs buf;    int i=0;    float disk_total_size = 0;    float disk_free_size = 0;    i=statfs(path, &buf);    if(i < 0){        printf("get disk infomation faild\n");        return 0;    }    switch(buf.f_type)    {        memset(di->disk_format, 0, 8);        case 0x4d44:        sprintf(di->disk_format, "FAT");        break;        case 0x5346544e:        case 0X65735546:         sprintf(di->disk_format, "NTFS");        break;        case 0xEF53:        case 0xEF51:        sprintf(di->disk_format, "EXT2");        break;        default:        sprintf(di->disk_format, "unknown");        break;    }    memset(di->disk_total_capacity, 0, 10);    memset(di->disk_free_capacity, 0, 10);    disk_total_size =             (float)(kscale(buf.f_blocks, buf.f_bsize));    disk_free_size =             (float)(kscale(buf.f_bfree, buf.f_bsize));    convert_size(disk_total_size, di->disk_total_capacity);    convert_size(disk_free_size, di->disk_free_capacity);    memset(di->disk_permissions, 0, 3);    sprintf(di->disk_permissions, "rw\n");    return 1;}/**  * @name convert_size * @brief convert size to GB MB KB *         size:    the size *         dest:    the return size like string * @author JerryLeo * @date 2009-12-12 */static char *convert_size(float size, char *dest){    if((((size/1024.0)/1024.0)) >= 1.0){         sprintf(dest, "%0.2fGB", ((size/1024.0)/1024.0));    }     else if(((size/1024.0)) >= 1.0){         sprintf(dest, "%0.2fMB", (size/1024.0));    }     else{        sprintf(dest, "%0.2fKB", size);    }     return dest;}