root / prex-0.9.0 / usr / lib / libc / stdio / fdopen.c @ 03e9c04a
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/*-
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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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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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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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* are met:
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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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*
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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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* SUCH DAMAGE.
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*/
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#include <sys/types.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <errno.h> |
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#include "local.h" |
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FILE * |
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fdopen(fd, mode) |
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int fd;
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const char *mode; |
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{ |
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FILE *fp; |
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int flags, oflags, fdflags, tmp;
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if ((flags = __sflags(mode, &oflags)) == 0) |
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return (NULL); |
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/* Make sure the mode the user wants is a subset of the actual mode. */
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if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0) |
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return (NULL); |
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tmp = fdflags & O_ACCMODE; |
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if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) {
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errno = EINVAL; |
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return (NULL); |
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} |
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if ((fp = __sfp()) == NULL) |
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return (NULL); |
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fp->_flags = flags; |
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/*
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* If opened for appending, but underlying descriptor does not have
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* O_APPEND bit set, assert __SAPP so that __swrite() will lseek to
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* end before each write.
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*/
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if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
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fp->_flags |= __SAPP; |
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fp->_file = fd; |
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return (fp);
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} |