+++ /dev/null
-/* Error handler for noninteractive utilities
- Copyright (C) 1990-1998, 2000-2007, 2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- 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 <http://www.gnu.org/licenses/>. */
-
-/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-
-#if !_LIBC
-# include <config.h>
-#endif
-
-#include "error.h"
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#if !_LIBC && ENABLE_NLS
-# include "gettext.h"
-# define _(msgid) gettext (msgid)
-#endif
-
-#ifdef _LIBC
-# include <libintl.h>
-# include <stdbool.h>
-# include <stdint.h>
-# include <wchar.h>
-# define mbsrtowcs __mbsrtowcs
-#endif
-
-#if USE_UNLOCKED_IO
-# include "unlocked-io.h"
-#endif
-
-#ifndef _
-# define _(String) String
-#endif
-
-/* If NULL, error will flush stdout, then print on stderr the program
- name, a colon and a space. Otherwise, error will call this
- function without parameters instead. */
-void (*error_print_progname) (void);
-
-/* This variable is incremented each time `error' is called. */
-unsigned int error_message_count;
-
-#ifdef _LIBC
-/* In the GNU C library, there is a predefined variable for this. */
-
-# define program_name program_invocation_name
-# include <errno.h>
-# include <limits.h>
-# include <libio/libioP.h>
-
-/* In GNU libc we want do not want to use the common name `error' directly.
- Instead make it a weak alias. */
-extern void __error (int status, int errnum, const char *message, ...)
- __attribute__ ((__format__ (__printf__, 3, 4)));
-extern void __error_at_line (int status, int errnum, const char *file_name,
- unsigned int line_number, const char *message,
- ...)
- __attribute__ ((__format__ (__printf__, 5, 6)));;
-# define error __error
-# define error_at_line __error_at_line
-
-# include <libio/iolibio.h>
-# define fflush(s) INTUSE(_IO_fflush) (s)
-# undef putc
-# define putc(c, fp) INTUSE(_IO_putc) (c, fp)
-
-# include <bits/libc-lock.h>
-
-#else /* not _LIBC */
-
-# include <fcntl.h>
-
-# if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
-# ifndef HAVE_DECL_STRERROR_R
-"this configure-time declaration test was not run"
-# endif
-char *strerror_r ();
-# endif
-
-/* The calling program should define program_name and set it to the
- name of the executing program. */
-extern char *program_name;
-
-# if HAVE_STRERROR_R || defined strerror_r
-# define __strerror_r strerror_r
-# endif /* HAVE_STRERROR_R || defined strerror_r */
-#endif /* not _LIBC */
-
-static void
-print_errno_message (int errnum)
-{
- char const *s;
-
-#if defined HAVE_STRERROR_R || _LIBC
- char errbuf[1024];
-# if STRERROR_R_CHAR_P || _LIBC
- s = __strerror_r (errnum, errbuf, sizeof errbuf);
-# else
- if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
- s = errbuf;
- else
- s = 0;
-# endif
-#else
- s = strerror (errnum);
-#endif
-
-#if !_LIBC
- if (! s)
- s = _("Unknown system error");
-#endif
-
-#if _LIBC
- __fxprintf (NULL, ": %s", s);
-#else
- fprintf (stderr, ": %s", s);
-#endif
-}
-
-static void
-error_tail (int status, int errnum, const char *message, va_list args)
-{
-#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- {
-# define ALLOCA_LIMIT 2000
- size_t len = strlen (message) + 1;
- wchar_t *wmessage = NULL;
- mbstate_t st;
- size_t res;
- const char *tmp;
- bool use_malloc = false;
-
- while (1)
- {
- if (__libc_use_alloca (len * sizeof (wchar_t)))
- wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
- else
- {
- if (!use_malloc)
- wmessage = NULL;
-
- wchar_t *p = (wchar_t *) realloc (wmessage,
- len * sizeof (wchar_t));
- if (p == NULL)
- {
- free (wmessage);
- fputws_unlocked (L"out of memory\n", stderr);
- return;
- }
- wmessage = p;
- use_malloc = true;
- }
-
- memset (&st, '\0', sizeof (st));
- tmp = message;
-
- res = mbsrtowcs (wmessage, &tmp, len, &st);
- if (res != len)
- break;
-
- if (__builtin_expect (len >= SIZE_MAX / 2, 0))
- {
- /* This really should not happen if everything is fine. */
- res = (size_t) -1;
- break;
- }
-
- len *= 2;
- }
-
- if (res == (size_t) -1)
- {
- /* The string cannot be converted. */
- if (use_malloc)
- {
- free (wmessage);
- use_malloc = false;
- }
- wmessage = (wchar_t *) L"???";
- }
-
- __vfwprintf (stderr, wmessage, args);
-
- if (use_malloc)
- free (wmessage);
- }
- else
-#endif
- vfprintf (stderr, message, args);
- va_end (args);
-
- ++error_message_count;
- if (errnum)
- print_errno_message (errnum);
-#if _LIBC
- __fxprintf (NULL, "\n");
-#else
- putc ('\n', stderr);
-#endif
- fflush (stderr);
- if (status)
- exit (status);
-}
-
-
-/* Print the program name and error message MESSAGE, which is a printf-style
- format string with optional args.
- If ERRNUM is nonzero, print its corresponding system error message.
- Exit with status STATUS if it is nonzero. */
-void
-error (int status, int errnum, const char *message, ...)
-{
- va_list args;
-
-#if defined _LIBC && defined __libc_ptf_call
- /* We do not want this call to be cut short by a thread
- cancellation. Therefore disable cancellation for now. */
- int state = PTHREAD_CANCEL_ENABLE;
- __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
- 0);
-#endif
-
-#if !_LIBC && defined F_GETFL
- /* POSIX states that fflush (stdout) after fclose is unspecified; it
- is safe in glibc, but not on all other platforms. fflush (NULL)
- is always defined, but too draconian. */
- if (0 <= fcntl (1, F_GETFL))
-#endif
- fflush (stdout);
-#ifdef _LIBC
- _IO_flockfile (stderr);
-#endif
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
-#if _LIBC
- __fxprintf (NULL, "%s: ", program_name);
-#else
- fprintf (stderr, "%s: ", program_name);
-#endif
- }
-
- va_start (args, message);
- error_tail (status, errnum, message, args);
-
-#ifdef _LIBC
- _IO_funlockfile (stderr);
-# ifdef __libc_ptf_call
- __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
-# endif
-#endif
-}
-\f
-/* Sometimes we want to have at most one error per line. This
- variable controls whether this mode is selected or not. */
-int error_one_per_line;
-
-void
-error_at_line (int status, int errnum, const char *file_name,
- unsigned int line_number, const char *message, ...)
-{
- va_list args;
-
- if (error_one_per_line)
- {
- static const char *old_file_name;
- static unsigned int old_line_number;
-
- if (old_line_number == line_number
- && (file_name == old_file_name
- || strcmp (old_file_name, file_name) == 0))
- /* Simply return and print nothing. */
- return;
-
- old_file_name = file_name;
- old_line_number = line_number;
- }
-
-#if defined _LIBC && defined __libc_ptf_call
- /* We do not want this call to be cut short by a thread
- cancellation. Therefore disable cancellation for now. */
- int state = PTHREAD_CANCEL_ENABLE;
- __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
- 0);
-#endif
-
-#if !_LIBC && defined F_GETFL
- /* POSIX states that fflush (stdout) after fclose is unspecified; it
- is safe in glibc, but not on all other platforms. fflush (NULL)
- is always defined, but too draconian. */
- if (0 <= fcntl (1, F_GETFL))
-#endif
- fflush (stdout);
-#ifdef _LIBC
- _IO_flockfile (stderr);
-#endif
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
-#if _LIBC
- __fxprintf (NULL, "%s:", program_name);
-#else
- fprintf (stderr, "%s:", program_name);
-#endif
- }
-
-#if _LIBC
- __fxprintf (NULL, file_name != NULL ? "%s:%d: " : " ",
- file_name, line_number);
-#else
- fprintf (stderr, file_name != NULL ? "%s:%d: " : " ",
- file_name, line_number);
-#endif
-
- va_start (args, message);
- error_tail (status, errnum, message, args);
-
-#ifdef _LIBC
- _IO_funlockfile (stderr);
-# ifdef __libc_ptf_call
- __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
-# endif
-#endif
-}
-
-#ifdef _LIBC
-/* Make the weak alias. */
-# undef error
-# undef error_at_line
-weak_alias (__error, error)
-weak_alias (__error_at_line, error_at_line)
-#endif
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