Get HDD size programatically on MacOS using C++

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I am building an application and I need to get the HDD size:
I am working on Mac OS. I have tried this:

#include <sys/param.h>

#include <sys/mount.h>



float MonitoringWorker::getHDDSize()

{

 struct statfs statf;



 statfs(".", &statf);



 std::cout << "statf.f_bsize = " << statf.f_bsize << std::endl;

 std::cout << "statf.f_blocks = " << statf.f_blocks << std::endl;

 std::cout << "statf.f_bavail = " << statf.f_bavail << std::endl;

 std::cout << "statf.f_bfree = "<< statf.f_bfree << std::endl;

 std::cout << "GB = "<< ((statf.f_bsize * statf.f_blocks) /  kBytesInGB)<< std::endl;

 return 0;



}

I am seeing that the result in GB is 465. However checking System Information tells me that I have 500GB
What am I doing wrong? Is this best way to get those numbers?

Note: I am using C++ on Mac OS, can't use Objective-C

Thanks in advance

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

1

The program gets the file system capacity, not the physical capacity of the HDD.
– eprom
2 days ago

how can I get the physical capacity, then?
– RuLoViC
2 days ago

add a comment |

up vote
0
down vote

favorite

I am building an application and I need to get the HDD size:
I am working on Mac OS. I have tried this:

#include <sys/param.h>

#include <sys/mount.h>



float MonitoringWorker::getHDDSize()

{

 struct statfs statf;



 statfs(".", &statf);



 std::cout << "statf.f_bsize = " << statf.f_bsize << std::endl;

 std::cout << "statf.f_blocks = " << statf.f_blocks << std::endl;

 std::cout << "statf.f_bavail = " << statf.f_bavail << std::endl;

 std::cout << "statf.f_bfree = "<< statf.f_bfree << std::endl;

 std::cout << "GB = "<< ((statf.f_bsize * statf.f_blocks) /  kBytesInGB)<< std::endl;

 return 0;



}

I am seeing that the result in GB is 465. However checking System Information tells me that I have 500GB
What am I doing wrong? Is this best way to get those numbers?

Note: I am using C++ on Mac OS, can't use Objective-C

Thanks in advance

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

1

The program gets the file system capacity, not the physical capacity of the HDD.
– eprom
2 days ago

how can I get the physical capacity, then?
– RuLoViC
2 days ago

add a comment |

up vote
0
down vote

favorite

I am building an application and I need to get the HDD size:
I am working on Mac OS. I have tried this:

#include <sys/param.h>

#include <sys/mount.h>



float MonitoringWorker::getHDDSize()

{

 struct statfs statf;



 statfs(".", &statf);



 std::cout << "statf.f_bsize = " << statf.f_bsize << std::endl;

 std::cout << "statf.f_blocks = " << statf.f_blocks << std::endl;

 std::cout << "statf.f_bavail = " << statf.f_bavail << std::endl;

 std::cout << "statf.f_bfree = "<< statf.f_bfree << std::endl;

 std::cout << "GB = "<< ((statf.f_bsize * statf.f_blocks) /  kBytesInGB)<< std::endl;

 return 0;



}

I am seeing that the result in GB is 465. However checking System Information tells me that I have 500GB
What am I doing wrong? Is this best way to get those numbers?

Note: I am using C++ on Mac OS, can't use Objective-C

Thanks in advance

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

I am building an application and I need to get the HDD size:
I am working on Mac OS. I have tried this:

#include <sys/param.h>

#include <sys/mount.h>



float MonitoringWorker::getHDDSize()

{

 struct statfs statf;



 statfs(".", &statf);



 std::cout << "statf.f_bsize = " << statf.f_bsize << std::endl;

 std::cout << "statf.f_blocks = " << statf.f_blocks << std::endl;

 std::cout << "statf.f_bavail = " << statf.f_bavail << std::endl;

 std::cout << "statf.f_bfree = "<< statf.f_bfree << std::endl;

 std::cout << "GB = "<< ((statf.f_bsize * statf.f_blocks) /  kBytesInGB)<< std::endl;

 return 0;



}

I am seeing that the result in GB is 465. However checking System Information tells me that I have 500GB
What am I doing wrong? Is this best way to get those numbers?

Note: I am using C++ on Mac OS, can't use Objective-C

Thanks in advance

macos c++11 filesystems

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

edited Nov 10 at 16:55

Tom Harrington

51.5k596126

asked Nov 10 at 11:59

RuLoViC

15512

asked Nov 10 at 11:59

RuLoViC

15512

asked Nov 10 at 11:59

RuLoViC

15512

1

The program gets the file system capacity, not the physical capacity of the HDD.
– eprom
2 days ago

how can I get the physical capacity, then?
– RuLoViC
2 days ago

add a comment |

1

The program gets the file system capacity, not the physical capacity of the HDD.
– eprom
2 days ago

how can I get the physical capacity, then?
– RuLoViC
2 days ago

The program gets the file system capacity, not the physical capacity of the HDD.
– eprom
2 days ago

how can I get the physical capacity, then?
– RuLoViC
2 days ago

add a comment |

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