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glibc/misc/err.c
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/* 4.4BSD utility functions for error messages. | |
Copyright (C) 1995,96,98,2001,02 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, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#include <stdarg.h> | |
#include <err.h> | |
#include <stdlib.h> | |
#include <errno.h> | |
#include <string.h> | |
#include <stdio.h> | |
#ifdef USE_IN_LIBIO | |
# include <wchar.h> | |
# define flockfile(s) _IO_flockfile (s) | |
# define funlockfile(s) _IO_funlockfile (s) | |
#endif | |
extern char *__progname; | |
#define VA(call) \ | |
{ \ | |
va_list ap; \ | |
va_start (ap, format); \ | |
call; \ | |
va_end (ap); \ | |
} | |
#ifdef USE_IN_LIBIO | |
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); | |
} | |
#endif | |
void | |
vwarnx (const char *format, __gnuc_va_list ap) | |
{ | |
flockfile (stderr); | |
#ifdef USE_IN_LIBIO | |
if (_IO_fwide (stderr, 0) > 0) | |
{ | |
__fwprintf (stderr, L"%s: ", __progname); | |
convert_and_print (format, ap); | |
putwc_unlocked (L'\n', stderr); | |
} | |
else | |
#endif | |
{ | |
fprintf (stderr, "%s: ", __progname); | |
if (format) | |
vfprintf (stderr, format, ap); | |
putc_unlocked ('\n', stderr); | |
} | |
funlockfile (stderr); | |
} | |
libc_hidden_def (warnx) | |
void | |
vwarn (const char *format, __gnuc_va_list ap) | |
{ | |
int error = errno; | |
flockfile (stderr); | |
#ifdef USE_IN_LIBIO | |
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 | |
#endif | |
{ | |
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 (warnx) | |
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)) | |
} |