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






macos c++11 filesystems







share|improve this question




















  • 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















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






macos c++11 filesystems







share|improve this question




















  • 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













up vote
0
down vote

favorite









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






macos c++11 filesystems







share|improve this question















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




macos c++11 filesystems






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 10 at 16:55









Tom Harrington

51.5k596126




51.5k596126










asked Nov 10 at 11:59









RuLoViC

15512




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














  • 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








1




1




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




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

















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