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/* Return diagnostic string based on error code.
Copyright (C) 2023-2025 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "xstrerror.h"
#include <string.h>
#include "xvasprintf.h"
#include "xalloc.h"
#include "gettext.h"
#define _(msgid) dgettext ("gnulib", msgid)
char *
xstrerror (const char *message, int errnum)
{
/* Get the internationalized description of errnum,
in a stack-allocated buffer. */
const char *errdesc;
char errbuf[1024];
#if !GNULIB_STRERROR_R_POSIX && STRERROR_R_CHAR_P
errdesc = strerror_r (errnum, errbuf, sizeof errbuf);
#else
if (strerror_r (errnum, errbuf, sizeof errbuf) == 0)
errdesc = errbuf;
else
errdesc = NULL;
#endif
if (errdesc == NULL)
errdesc = _("Unknown system error");
if (message != NULL)
{
/* Allow e.g. French translators to insert a space before the colon. */
char *result = xasprintf (_("%s: %s"), message, errdesc);
if (result == NULL)
/* Probably a buggy translation. Use a safe fallback. */
result = xasprintf ("%s%s%s", message, ": ", errdesc);
return result;
}
else
return xstrdup (errdesc);
}
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