How do I get the directory that a program is running from?

Question

Is there a platform-agnostic and filesystem-agnostic method to obtain the full path of the directory from where a program is running using C/C++? Not to be confused with the

Answer 1

This is from the cplusplus forum

On windows:

#include 
#include 

std::string getexepath()
{
  char result[ MAX_PATH ];
  return std::string( result, GetModuleFileName( NULL, result, MAX_PATH ) );
}

On Linux:

#include 
#include 
#include 

std::string getexepath()
{
  char result[ PATH_MAX ];
  ssize_t count = readlink( "/proc/self/exe", result, PATH_MAX );
  return std::string( result, (count > 0) ? count : 0 );
}

On HP-UX:

#include 
#include 
#define _PSTAT64
#include 
#include 
#include 

std::string getexepath()
{
  char result[ PATH_MAX ];
  struct pst_status ps;

  if (pstat_getproc( &ps, sizeof( ps ), 0, getpid() ) < 0)
    return std::string();

  if (pstat_getpathname( result, PATH_MAX, &ps.pst_fid_text ) < 0)
    return std::string();

  return std::string( result );
}