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freebsd/lib/libc/include/errlst.h
Konstantin Belousov cd49e866fc Bump sys_errlist size to keep ABI backward-compatible for some time.
Addition of the new errno values requires adding new elements to
sys_errlist array, which is actually ABI-incompatible, since ELF
records the object size.  Expand array in advance to 150 elements so
that we have our users to go over the issue only once, at least until
more than 53 new errors are added.

I did not bumped the symbol version, same as it was not done for
previous increases of the array size.  Runtime linker only copies as
much data into binary object on copy relocation as the binary'object
specifies.  This is not fixable for binaries which access sys_errlist
directly.

While there, correct comment and calculation of the temporary buffer
size for the message printed for unknown error.  The on-stack buffer
is used only for the number and delimiter since r108603.

Requested by:	mckusick
Reviewed by:	mckusick, yuripv
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D18656
2018-12-27 13:02:15 +00:00

48 lines
1.8 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2013 Jilles Tjoelker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef __ERRLST_H__
#define __ERRLST_H__
#include <sys/cdefs.h>
#ifdef PIC
/* If the main executable imports these, do not use its copy from libc.so. */
extern const char *const __hidden_sys_errlist[] __hidden;
extern const int __hidden_sys_nerr __hidden;
#else
#define __hidden_sys_errlist sys_errlist
#define __hidden_sys_nerr sys_nerr
#endif
extern const char __uprefix[] __hidden;
#endif /* __ERRLST_H__ */