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OS.cpp

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#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/systeminfo.h>
//#include <sys/sysinfo.h>
#include "OSDependent/OS.h"

const char OS::DirectorySeparator = '/';

/*
 * Get the hostname of this machine.
 * The returned value is statically allocated, so the user does 
 * not need to deallocate, but should copy it if it needs it after 
 * subsequent calls.
 *
 * Returns name on success, NULL on failure.
 */
const char *
OS::getMyHostName()
{
  struct utsname info;
  // First, ask the local host.
  if (::uname(&info) < 0)
    return NULL;
  // Now, ask the DNS server.
  struct hostent *ent = ::gethostbyname(info.nodename);
  return ent->h_name;
}

/*
 * Reentrant version of strtok.
 */
char *
OS::strtok_r(char *s, const char *tokens, char **lasts)
{
  return ::strtok_r(s, tokens, lasts);
}

int 
OS::mkdir(const char *name)
{
#ifdef ACCESS_CONTROL
  return ::mkdir(name, S_IRWXU);
#else
  // TODO: fix permissions
  return ::mkdir(name, 0755);
#endif
}

int 
OS::rmdir(const char *name)
{
  return ::rmdir(name);
}

int 
OS::rename(const char *src, const char *dst)
{
  return ::rename(src, dst);
}

int 
OS::remove(const char *name)
{
  return ::unlink(name);
}

bool 
OS::isDirectory(const char *name)
{
  struct stat st;
  if (::stat(name, &st) < 0)
    return false;
#ifdef SHOULD_CRASH
  if (st.st_mode & S_IFDIR == S_IFDIR)
#else
  // Corrected by Binny.
  if ((st.st_mode & S_IFDIR) == S_IFDIR)
#endif
    return true;
  else
    return false;
}

char *
OS::getProcessorName ()
{
  static char buf[256]; 

  ::sysinfo(SI_ARCHITECTURE, buf, 255);
  return(buf);
}

char *
OS::getOSName()
{
 static char buf[512];

 ::sysinfo(SI_SYSNAME, buf, 511);
 return(buf);
}

char *
OS::getenv(const char * str)
{
  return ::getenv(str);
}

int
OS::getErrno()
{
  return errno;
}

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