67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
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/* $NetBSD: fgetstr.c,v 1.11 2010/01/11 20:39:29 joerg Exp $ */
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/*
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Roy Marples.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: fgetstr.c,v 1.11 2010/01/11 20:39:29 joerg Exp $");
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#include "namespace.h"
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include "reentrant.h"
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#include "local.h"
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/*
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* Get an input line.
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* This now uses getdelim(3) for a code reduction.
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* The upside is that strings are now always NULL terminated, but relying
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* on this is non portable - better to use the POSIX getdelim(3) function.
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*/
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char *
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__fgetstr(FILE *__restrict fp, size_t *__restrict lenp, int sep)
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{
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ssize_t n;
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_DIAGASSERT(fp != NULL);
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_DIAGASSERT(lenp != NULL);
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n = __getdelim(&_EXT(fp)->_fgetstr_buf, &_EXT(fp)->_fgetstr_len, sep, fp);
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if (n == -1) {
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*lenp = 0;
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if (__sferror(fp) && errno == EOVERFLOW) /* fixup errno */
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errno = EINVAL;
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return NULL;
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}
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*lenp = n;
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return _EXT(fp)->_fgetstr_buf;
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}
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