1 /* xgethostname.c -- return current hostname with unlimited length
2 Copyright (C) 1992, 1996 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by Jim Meyering, meyering@comco.com */
24 #include <sys/types.h>
34 # define EXIT_FAILURE 1
41 #ifndef INITIAL_HOSTNAME_LENGTH
42 # define INITIAL_HOSTNAME_LENGTH 34
52 size = INITIAL_HOSTNAME_LENGTH;
53 hostname = xmalloc (size);
56 /* Use size - 2 here rather than size - 1 to work around the bug
57 in SunOS5.5's gethostname whereby it NUL-terminates HOSTNAME
58 even when the name is longer than the supplied buffer. */
63 err = gethostname (hostname, size);
64 if (err == 0 && hostname[k] == '\0')
67 else if (err != 0 && errno != ENAMETOOLONG && errno != 0)
68 error (EXIT_FAILURE, errno, "gethostname");
71 hostname = xrealloc (hostname, size);