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/* $OpenBSD: stdio.c,v 1.9 2005/08/08 08:05:36 espie Exp $ */
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* This code is derived from software contributed to Berkeley by
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* Small standard I/O/seek/close functions.
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* These maintain the `known seek offset' for seek optimisation.
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__sread(void *cookie, char *buf, int n)
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ret = read(fp->_file, buf, n);
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/* if the read succeeded, update the current offset */
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fp->_flags &= ~__SOFF; /* paranoia */
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__swrite(void *cookie, const char *buf, int n)
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if (fp->_flags & __SAPP)
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(void) lseek(fp->_file, (off_t)0, SEEK_END);
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fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */
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return (write(fp->_file, buf, n));
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__sseek(void *cookie, fpos_t offset, int whence)
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ret = lseek(fp->_file, (off_t)offset, whence);
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fp->_flags &= ~__SOFF;
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__sclose(void *cookie)
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return (close(((FILE *)cookie)->_file));