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/* link.c. Implementation of the _link syscall for newlib
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Copyright (C) 2004, Jacob Bower
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Copyright (C) 2010, Embecosm Limited <info@embecosm.com>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of Newlib.
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The original work by Jacob Bower is provided as-is without any kind of
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warranty. Use it at your own risk!
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All subsequent work is bound by version 3 of the GPL as follows.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http:#www.gnu.org/licenses/>. */
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/* -------------------------------------------------------------------------- */
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/* This program is commented throughout in a fashion suitable for processing
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with Doxygen. */
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/* -------------------------------------------------------------------------- */
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#include <errno.h>
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#undef errno
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extern int errno;
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/* -------------------------------------------------------------------------- */
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/*!Establish a new name for an old file.
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We only support stdin, stdout and stderr and these cannot be linked. Any
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other file is invalid, so we always fail.
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Remember that this function is *not* reentrant, so no static state should
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be held.
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@param[in] old Old file name
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@param[in] new New file name
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@return -1 to indicate failure, with an error code in the global variable
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errno. */
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/* -------------------------------------------------------------------------- */
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int
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_link (char *old,
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char *new)
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{
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errno = EMLINK;
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return -1; /* Always fails */
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} /* _link () */
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