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glibc  2.9
linkat.c
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00001 /* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <fcntl.h>
00021 #include <stddef.h>
00022 #include <unistd.h>
00023 
00024 
00025 /* Make a link to FROM relative to FROMFD called TO relative to TOFD.  */
00026 int
00027 linkat (fromfd, from, tofd, to, flags)
00028      int fromfd;
00029      const char *from;
00030      int tofd;
00031      const char *to;
00032      int flags;
00033 {
00034   if (from == NULL || to == NULL)
00035     {
00036       __set_errno (EINVAL);
00037       return -1;
00038     }
00039 
00040   if ((tofd != AT_FDCWD && tofd < 0 && *to != '/')
00041       || (fromfd != AT_FDCWD && fromfd < 0 && *from != '/'))
00042     {
00043       __set_errno (EBADF);
00044       return -1;
00045     }
00046 
00047   __set_errno (ENOSYS);
00048   return -1;
00049 }
00050 stub_warning (linkat)
00051 
00052 #include <stub-tag.h>