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2403e6d5aa
The manual page says %m is replaced with “the string representation of the error code stored in the errno variable at the beginning of the call”. However, we don't actually save `errno` until fairly late in `__vfprintf()`. Make sure it is saved before we do anything that might perturb `errno`. MFC after: 1 week Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D46718 (cherry picked from commit 74f1007fcc838501c74a633792c3f01833bf65e1)
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2009 David Schultz <das@FreeBSD.org>
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* All rights reserved.
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*
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* Copyright (c) 2011 The FreeBSD Foundation
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*
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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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 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 AUTHOR 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 "namespace.h"
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#include <errno.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include "un-namespace.h"
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#include "local.h"
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#include "xlocale_private.h"
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int
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vdprintf(int fd, const char * __restrict fmt, va_list ap)
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{
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FILE f = FAKE_FILE;
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unsigned char buf[BUFSIZ];
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int serrno = errno;
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int ret;
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if (fd > SHRT_MAX) {
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errno = EMFILE;
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return (EOF);
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}
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f._p = buf;
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f._w = sizeof(buf);
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f._flags = __SWR;
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f._file = fd;
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f._cookie = &f;
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f._write = __swrite;
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f._bf._base = buf;
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f._bf._size = sizeof(buf);
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if ((ret = __vfprintf(&f, __get_locale(), serrno, fmt, ap)) < 0)
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return (ret);
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return (__fflush(&f) ? EOF : ret);
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}
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