Ticket #20: hfh.cpp

// This programme reads SMART values and decodes
// Head_Flying_Hours from my ST31000528AS.
// Put this file in the smartmontools tree.
#include <stdio.h>

#include <unistd.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <string.h>
#include <stdint.h>
#include <time.h>

#include "atacmds.h"

#define HDIO_GET_IDENTITY   0x030d  /* get IDE identification info */
#define HDIO_DRIVE_TASK             0x031e  /* execute task and special drive command */
#define HDIO_DRIVE_CMD              0x031f  /* execute a special drive command */

#define BUFFER_LENGTH (4+512)

using namespace std;
int main(int ac, char* av[]) {
        time_t t;
        int i;
        int fd;
        int rc;
        unsigned short deviceid[256];
        unsigned char buf[BUFFER_LENGTH];

        struct ata_smart_attribute *attrs;
        struct ata_smart_values *values;

        fd=open("/dev/sda", O_RDONLY|O_NONBLOCK);
        if(fd < 0) {
                perror("open");
        }

        memset(deviceid, 0, sizeof(deviceid));
        rc = ioctl(fd, HDIO_GET_IDENTITY, deviceid);
        if( -1 == rc) {
                perror("ioctl");
        }

        while(1) {
                memset(buf, 0, sizeof(buf));
                buf[0]=ATA_SMART_CMD;
                buf[2]=ATA_SMART_READ_VALUES;
                buf[3]=1;
                t=time(NULL);
                rc = ioctl(fd, HDIO_DRIVE_CMD, buf);
                if( -1 == rc) {
                        perror("ioctl");
                }
                values = (struct ata_smart_values*)(buf+4);
                for (i = 0; i < NUMBER_ATA_SMART_ATTRIBUTES; ++i) {
                        if(240 != values->vendor_attributes[i].id) continue;
                        printf("%d\t", t);
                        printf("0x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
                                values->vendor_attributes[i].raw[3],
                                values->vendor_attributes[i].raw[2],
                                values->vendor_attributes[i].raw[1],
                                values->vendor_attributes[i].raw[0],
                                values->vendor_attributes[i].reserv,
                                values->vendor_attributes[i].raw[5],
                                values->vendor_attributes[i].raw[4]
                                );
                }
                sleep(10);
        }
        close(fd);
}