ee4b8e07a8
This ensures strerror() and friends continue to work correctly even if a (non-PIE) executable linked against an older libc imports sys_errlist (which causes sys_errlist to refer to the executable's copy with a size fixed when that executable was linked). The executable's use of sys_errlist remains broken because it uses the current value of sys_nerr and may access past the bounds of the array. Different from the message "Using sys_errlist from executables is not ABI-stable" on freebsd-arch, this change does not affect the static library. There seems no reason to prevent overriding the error messages in the static library.
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/*-
|
|
* Copyright (c) 1988, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#if defined(NLS)
|
|
#include <nl_types.h>
|
|
#endif
|
|
|
|
#include <limits.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#include "errlst.h"
|
|
|
|
#define UPREFIX "Unknown error"
|
|
|
|
/*
|
|
* Define a buffer size big enough to describe a 64-bit signed integer
|
|
* converted to ASCII decimal (19 bytes), with an optional leading sign
|
|
* (1 byte); finally, we get the prefix, delimiter (": ") and a trailing
|
|
* NUL from UPREFIX.
|
|
*/
|
|
#define EBUFSIZE (20 + 2 + sizeof(UPREFIX))
|
|
|
|
/*
|
|
* Doing this by hand instead of linking with stdio(3) avoids bloat for
|
|
* statically linked binaries.
|
|
*/
|
|
static void
|
|
errstr(int num, char *uprefix, char *buf, size_t len)
|
|
{
|
|
char *t;
|
|
unsigned int uerr;
|
|
char tmp[EBUFSIZE];
|
|
|
|
t = tmp + sizeof(tmp);
|
|
*--t = '\0';
|
|
uerr = (num >= 0) ? num : -num;
|
|
do {
|
|
*--t = "0123456789"[uerr % 10];
|
|
} while (uerr /= 10);
|
|
if (num < 0)
|
|
*--t = '-';
|
|
*--t = ' ';
|
|
*--t = ':';
|
|
strlcpy(buf, uprefix, len);
|
|
strlcat(buf, t, len);
|
|
}
|
|
|
|
int
|
|
strerror_r(int errnum, char *strerrbuf, size_t buflen)
|
|
{
|
|
int retval = 0;
|
|
#if defined(NLS)
|
|
int saved_errno = errno;
|
|
nl_catd catd;
|
|
catd = catopen("libc", NL_CAT_LOCALE);
|
|
#endif
|
|
|
|
if (errnum < 0 || errnum >= __hidden_sys_nerr) {
|
|
errstr(errnum,
|
|
#if defined(NLS)
|
|
catgets(catd, 1, 0xffff, UPREFIX),
|
|
#else
|
|
UPREFIX,
|
|
#endif
|
|
strerrbuf, buflen);
|
|
retval = EINVAL;
|
|
} else {
|
|
if (strlcpy(strerrbuf,
|
|
#if defined(NLS)
|
|
catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]),
|
|
#else
|
|
__hidden_sys_errlist[errnum],
|
|
#endif
|
|
buflen) >= buflen)
|
|
retval = ERANGE;
|
|
}
|
|
|
|
#if defined(NLS)
|
|
catclose(catd);
|
|
errno = saved_errno;
|
|
#endif
|
|
|
|
return (retval);
|
|
}
|
|
|
|
char *
|
|
strerror(int num)
|
|
{
|
|
static char ebuf[NL_TEXTMAX];
|
|
|
|
if (strerror_r(num, ebuf, sizeof(ebuf)) != 0)
|
|
errno = EINVAL;
|
|
return (ebuf);
|
|
}
|