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/*@@
@file Network.c
@date Fri 19 Jan 2001
@author Thomas Radke
@desc
Network related routines
@enddesc
@version $Header$
@@*/
#include "cctk.h"
#include "util_Network.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_NETDB_H
# include <netdb.h>
#elif defined HAVE_WINSOCK2_H
# include <winsock2.h>
#endif /* HAVE_WINSOCK2_H */
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(util_Network_c);
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine Util_GetHostName
@date Fri Oct 20 12:12:34 2000
@author Tom Goodale
@desc
Gets the fully qualified name of this host if possible.
@enddesc
@calls
@history
just copied from thorn HTTPD
@endhistory
@var name
@vdesc character buffer to store name in
@vtype char *
@vio out
@vcomment
@endvar
@var length
@vdesc length of the character buffer
@vtype int
@vio in
@vcomment
@endvar
@@*/
void Util_GetHostName (char *returned_name, int length)
{
static int have_name = 0;
static char name[100];
if (! have_name)
{
gethostname (name, sizeof name);
/* Does the name include the domain name? */
if (! strchr (name, '.'))
{
#ifdef HAVE_GETHOSTBYNAME
struct hostent *thishostent = 0;
#ifndef CRAY_XT
thishostent = gethostbyname (name);
#endif
if (thishostent)
{
strncpy (name, thishostent->h_name, sizeof name - 1);
name[sizeof name - 1] = '\0';
}
else
{
name[0] = '\0';
}
#endif
}
have_name = 1;
}
if (! returned_name)
{
CCTK_WARN (CCTK_WARN_ABORT, "Argument \"name\" to Util_GetHostName is NULL");
}
if (length < 1)
{
CCTK_WARN (CCTK_WARN_ABORT, "Argument \"length\" to Util_GetHostName is too small");
}
strncpy (returned_name, name, length - 1);
returned_name[length - 1] = '\0';
}
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