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/* 4.4BSD utility functions for error messages.
Copyright (C) 1995-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <err.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <wchar.h>
#define flockfile(s) _IO_flockfile (s)
#define funlockfile(s) _IO_funlockfile (s)
extern char *__progname;
#define VA(call) \
{ \
va_list ap; \
va_start (ap, format); \
call; \
va_end (ap); \
}
static void
convert_and_print (const char *format, __gnuc_va_list ap)
{
#define ALLOCA_LIMIT 2000
size_t len;
wchar_t *wformat = NULL;
mbstate_t st;
size_t res;
const char *tmp;
if (format == NULL)
return;
len = strlen (format) + 1;
do
{
if (len < ALLOCA_LIMIT)
wformat = (wchar_t *) alloca (len * sizeof (wchar_t));
else
{
if (wformat != NULL && len / 2 < ALLOCA_LIMIT)
wformat = NULL;
wformat = (wchar_t *) realloc (wformat, len * sizeof (wchar_t));
if (wformat == NULL)
{
fputws_unlocked (L"out of memory\n", stderr);
return;
}
}
memset (&st, '\0', sizeof (st));
tmp =format;
}
while ((res = __mbsrtowcs (wformat, &tmp, len, &st)) == len);
if (res == (size_t) -1)
/* The string cannot be converted. */
wformat = (wchar_t *) L"???";
__vfwprintf (stderr, wformat, ap);
}
void
vwarnx (const char *format, __gnuc_va_list ap)
{
flockfile (stderr);
if (_IO_fwide (stderr, 0) > 0)
{
__fwprintf (stderr, L"%s: ", __progname);
convert_and_print (format, ap);
putwc_unlocked (L'\n', stderr);
}
else
{
fprintf (stderr, "%s: ", __progname);
if (format)
vfprintf (stderr, format, ap);
putc_unlocked ('\n', stderr);
}
funlockfile (stderr);
}
libc_hidden_def (vwarnx)
void
vwarn (const char *format, __gnuc_va_list ap)
{
int error = errno;
flockfile (stderr);
if (_IO_fwide (stderr, 0) > 0)
{
__fwprintf (stderr, L"%s: ", __progname);
if (format)
{
convert_and_print (format, ap);
fputws_unlocked (L": ", stderr);
}
__set_errno (error);
__fwprintf (stderr, L"%m\n");
}
else
{
fprintf (stderr, "%s: ", __progname);
if (format)
{
vfprintf (stderr, format, ap);
fputs_unlocked (": ", stderr);
}
__set_errno (error);
fprintf (stderr, "%m\n");
}
funlockfile (stderr);
}
libc_hidden_def (vwarn)
void
warn (const char *format, ...)
{
VA (vwarn (format, ap))
}
libc_hidden_def (warn)
void
warnx (const char *format, ...)
{
VA (vwarnx (format, ap))
}
libc_hidden_def (warnx)
void
verr (int status, const char *format, __gnuc_va_list ap)
{
vwarn (format, ap);
exit (status);
}
libc_hidden_def (verr)
void
verrx (int status, const char *format, __gnuc_va_list ap)
{
vwarnx (format, ap);
exit (status);
}
libc_hidden_def (verrx)
void
err (int status, const char *format, ...)
{
VA (verr (status, format, ap))
}
void
errx (int status, const char *format, ...)
{
VA (verrx (status, format, ap))
}
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