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/* 4.4BSD utility functions for error messages.
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Copyright (C) 1995-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdarg.h>
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#include <err.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <wchar.h>
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#define flockfile(s) _IO_flockfile (s)
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#define funlockfile(s) _IO_funlockfile (s)
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extern char *__progname;
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#define VA(call) \
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{ \
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va_list ap; \
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va_start (ap, format); \
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call; \
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va_end (ap); \
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}
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static void
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convert_and_print (const char *format, __gnuc_va_list ap)
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{
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#define ALLOCA_LIMIT 2000
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size_t len;
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wchar_t *wformat = NULL;
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mbstate_t st;
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size_t res;
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const char *tmp;
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if (format == NULL)
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return;
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len = strlen (format) + 1;
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do
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{
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if (len < ALLOCA_LIMIT)
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wformat = (wchar_t *) alloca (len * sizeof (wchar_t));
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else
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{
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if (wformat != NULL && len / 2 < ALLOCA_LIMIT)
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wformat = NULL;
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wformat = (wchar_t *) realloc (wformat, len * sizeof (wchar_t));
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if (wformat == NULL)
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{
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fputws_unlocked (L"out of memory\n", stderr);
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return;
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}
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}
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memset (&st, '\0', sizeof (st));
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tmp =format;
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}
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while ((res = __mbsrtowcs (wformat, &tmp, len, &st)) == len);
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if (res == (size_t) -1)
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/* The string cannot be converted. */
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wformat = (wchar_t *) L"???";
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__vfwprintf (stderr, wformat, ap);
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}
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void
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vwarnx (const char *format, __gnuc_va_list ap)
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{
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flockfile (stderr);
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if (_IO_fwide (stderr, 0) > 0)
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{
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__fwprintf (stderr, L"%s: ", __progname);
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convert_and_print (format, ap);
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putwc_unlocked (L'\n', stderr);
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}
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else
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{
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fprintf (stderr, "%s: ", __progname);
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if (format)
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vfprintf (stderr, format, ap);
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putc_unlocked ('\n', stderr);
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}
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funlockfile (stderr);
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}
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libc_hidden_def (vwarnx)
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void
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vwarn (const char *format, __gnuc_va_list ap)
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{
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int error = errno;
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flockfile (stderr);
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if (_IO_fwide (stderr, 0) > 0)
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{
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__fwprintf (stderr, L"%s: ", __progname);
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if (format)
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{
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convert_and_print (format, ap);
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fputws_unlocked (L": ", stderr);
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}
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__set_errno (error);
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__fwprintf (stderr, L"%m\n");
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}
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else
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{
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fprintf (stderr, "%s: ", __progname);
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if (format)
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{
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vfprintf (stderr, format, ap);
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fputs_unlocked (": ", stderr);
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}
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__set_errno (error);
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fprintf (stderr, "%m\n");
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}
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funlockfile (stderr);
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}
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libc_hidden_def (vwarn)
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void
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warn (const char *format, ...)
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{
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VA (vwarn (format, ap))
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}
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libc_hidden_def (warn)
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void
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warnx (const char *format, ...)
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{
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VA (vwarnx (format, ap))
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}
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libc_hidden_def (warnx)
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void
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verr (int status, const char *format, __gnuc_va_list ap)
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{
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vwarn (format, ap);
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exit (status);
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}
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libc_hidden_def (verr)
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void
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verrx (int status, const char *format, __gnuc_va_list ap)
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{
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vwarnx (format, ap);
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exit (status);
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}
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libc_hidden_def (verrx)
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void
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err (int status, const char *format, ...)
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{
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VA (verr (status, format, ap))
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}
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void
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errx (int status, const char *format, ...)
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{
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VA (verrx (status, format, ap))
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}
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