Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/misc/err.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
179 lines (153 sloc)
3.73 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* 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)) | |
} |