home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 35 Internet
/
35-Internet.zip
/
fingercl.zip
/
hostname.c
< prev
next >
Wrap
C/C++ Source or Header
|
1997-08-29
|
2KB
|
65 lines
/* hostname.c -- Wrapper for gethostname(). */
/* Copyright (C) 1992 Free Software Foundation, Inc.
This file is part of GNU Finger.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#include <config.h>
#include <stdlib.h>
#include <sys/types.h>
#include <netdb.h>
#include <general.h>
/* Return host name. Assuming the host name doesn't change between
calls, we only call gethostname() once. */
char *
xgethostname ()
{
static char *hostname = NULL;
/* This is just an initial guess */
static int hostname_size = 128;
/* Deja Vu */
if (hostname)
return hostname;
/* Obtain host name */
hostname = xmalloc (hostname_size);
for (;;)
{
hostname[hostname_size - 1] = 0;
if (gethostname (hostname, hostname_size) < 0)
{
free (hostname);
hostname = NULL;
return NULL;
}
if (!hostname[hostname_size - 1])
return hostname;
hostname_size *= 2;
hostname = xrealloc (hostname, hostname_size);
}
}