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Nicer output for negative error numbers in strerror_r

This commit is contained in:
Ulrich Drepper 2011-05-21 12:09:23 -04:00
parent 8e211fecca
commit 7e4afad5bc
2 changed files with 14 additions and 3 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2011-05-21 Ulrich Drepper <drepper@gmail.com>
* string/_strerror.c (__strerror_r): Print negative errors as signed
numbers.
[BZ #12777]
* iconvdata/cp1258.c (comp_table_data): Remove entry 0x00A5 0xEC.
(decomp_table): Change U0385 entry to emit 0xA5 0xEC.

14
string/_strerror.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1991,93,95,96,97,98,2000,2002,2006
/* Copyright (C) 1991,93,95,96,97,98,2000,2002,2006,2011
Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -18,7 +18,9 @@
02111-1307 USA. */
#include <libintl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <stdio-common/_itoa.h>
@ -43,15 +45,21 @@ __strerror_r (int errnum, char *buf, size_t buflen)
`int' of 8 bytes we never need more than 20 digits. */
char numbuf[21];
const char *unk = _("Unknown error ");
const size_t unklen = strlen (unk);
size_t unklen = strlen (unk);
char *p, *q;
bool negative = errnum < 0;
numbuf[20] = '\0';
p = _itoa_word (errnum, &numbuf[20], 10, 0);
p = _itoa_word (abs (errnum), &numbuf[20], 10, 0);
/* Now construct the result while taking care for the destination
buffer size. */
q = __mempcpy (buf, unk, MIN (unklen, buflen));
if (negative && unklen < buflen)
{
*q++ = '-';
++unklen;
}
if (unklen < buflen)
memcpy (q, p, MIN ((size_t) (&numbuf[21] - p), buflen - unklen));