How to get Hard Disk serial number using C++ program in linux

anu_123 · 04-29-2010, 11:46 PM

i need to get the hard disk serial number of my machine using a C++ program,can anybody help with a sample program or similar solutions

Thanks in advance.

knudfl · 04-30-2010, 03:11 AM

Welcome to LQ.

You can just use the command : # hdparm -i /dev/sda
Or : # hdparm -i /dev/sda | grep -i serial
http://nixcraft.com/centos-rhel-fedo...l-no-info.html
..

fpmurphy · 05-01-2010, 12:28 AM

Here is a short C utility which will show you how to do it

Code:

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/hdreg.h>

int 
main(int argc, 
     char *argv[])
{
    static struct hd_driveid hd;
    int fd;

    if (geteuid() >  0) {
        printf("ERROR: Must be root to use\n");
        exit(1);
    }

    if ((fd = open(argv[1], O_RDONLY|O_NONBLOCK)) < 0) {
        printf("ERROR: Cannot open device %s\n", argv[1]);
        exit(1);
    }

    if (!ioctl(fd, HDIO_GET_IDENTITY, &hd)) {
        printf("Hard Disk Model: %.40s\n", hd.model);
        printf("  Serial Number: %.20s\n", hd.serial_no);
    } else if (errno == -ENOMSG) {
        printf("No hard disk identification information available\n");
    } else {
        perror("ERROR: HDIO_GET_IDENTITY");
        exit(1);
    }

    exit(0);
}

anu_123 · 05-03-2010, 08:46 AM

thank you for replying

@fpmurphy:
Every time i compile and run this program it gives me the error as follows
ERROR: Cannot open device (null)

thanks

@knudfl;

i used the command it worked..but i want this in the form of a c or cpp code..

thanks

TB0ne · 05-03-2010, 09:10 AM

Quote:

Originally Posted by anu_123

thank you for replying
@fpmurphy:
Every time i compile and run this program it gives me the error as follows
ERROR: Cannot open device (null)
thanks

@knudfl;
i used the command it worked..but i want this in the form of a c or cpp code..
thanks

Ok...you do realize that you will actually have to modify that code, and do some work on your own, to make it function, right??? That was sample code, to show you how to to it yourself. We're not going to write code for you.

anu_123 · 05-03-2010, 09:46 AM

is there any way that i can write a code in cpp which will execute the command "hdparm -i /dev/hda" command and then i can get the hdd serial number ??

thanks

broken · 05-03-2010, 12:49 PM

Quote:

Originally Posted by anu_123

Every time i compile and run this program it gives me the error as follows
ERROR: Cannot open device (null)

How exactly are you running the program?

TB0ne · 05-03-2010, 12:52 PM

Quote:

Originally Posted by anu_123

is there any way that i can write a code in cpp which will execute the command "hdparm -i /dev/hda" command and then i can get the hdd serial number ??
thanks

Yes, there is, easily. You'd do it the same way you would run any other system command.

However, you haven't yet shown us any of the work you've done, or what you've tried.

anu_123 · 05-03-2010, 11:13 PM

i tried with the following code:

#include <stdlib.h>
#include <iostream>
#include <stdio.h>

int main()
{
system("hdparm -i /dev/hda | grep -i serial");

}

and i got the output as:

[root@localhost anuradha]# g++ hddid.cpp -o hddid
hddid.cpp:9:2: warning: no newline at end of file
[root@localhost anuradha]# ./hddid
Model=SAMSUNG SP0802N, FwRev=TK200-04, SerialNo=S00JJ20X897934
[root@localhost anuradha]#

what i need is.. i should be able to use the output further in my code...
i dont have any handle or variable where this output is stored..
so that i can use it further..

fpmurphy · 05-04-2010, 08:04 AM

Quote:

Every time i compile and run this program it gives me the error as follows
ERROR: Cannot open device (null)

That is because you are not providing an argument to the command such as "/dev/sda"

knudfl · 05-04-2010, 08:23 AM

Quote:

What i need is..
I should be able to use the output further in my code...

Well, I guess you in some way can redirect the result
and read it later.
....... Like you would do with a command:
hdparm -i /dev/hda | grep -i serial > /var/log/serial.no