Back to index

glibc  2.9
gethostname.c
Go to the documentation of this file.
00001 /* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@redhat.com>, 2001
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <string.h>
00022 #include <unistd.h>
00023 
00024 #include <sysdep.h>
00025 #include <sys/syscall.h>
00026 #include <bp-checks.h>
00027 
00028 int
00029 __gethostname (char *name, size_t len)
00030 {
00031   int result;
00032 
00033   result = INLINE_SYSCALL (gethostname, 2, CHECK_N (name, len), len);
00034 
00035   if (result == 0
00036       /* See whether the string is terminated.  If not we will return
00037         an error.  */
00038       && memchr (name, '\0', len) == NULL)
00039     {
00040       __set_errno (EOVERFLOW);
00041       result = -1;
00042     }
00043 
00044   return result;
00045 }
00046 
00047 weak_alias (__gethostname, gethostname)