/xbmc/screensavers/rsxs-0.9/lib/error.c
C | 304 lines | 220 code | 45 blank | 39 comment | 36 complexity | bd107f0e3789d2a439115fc3dda5f1cb MD5 | raw file
Possible License(s): GPL-3.0, CC-BY-SA-3.0, LGPL-2.0, 0BSD, Unlicense, GPL-2.0, AGPL-1.0, BSD-3-Clause, LGPL-2.1, LGPL-3.0
- /* Error handler for noninteractive utilities
- Copyright (C) 1990-1998, 2000-2003, 2004 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 2, 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
- /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
- #ifdef HAVE_CONFIG_H
- # 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"
- #endif
- #ifdef _LIBC
- # 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 <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 */
- # 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
- # ifndef SIZE_MAX
- # define SIZE_MAX ((size_t) -1)
- # 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
- #endif /* not _LIBC */
- static void
- print_errno_message (int errnum)
- {
- char const *s = NULL;
- #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;
- # endif
- #endif
- #if !_LIBC
- if (! s && ! (s = strerror (errnum)))
- s = _("Unknown system error");
- #endif
- #if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- {
- __fwprintf (stderr, L": %s", s);
- return;
- }
- #endif
- fprintf (stderr, ": %s", s);
- }
- 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;
- const wchar_t *wmessage = L"out of memory";
- wchar_t *wbuf = (len < ALLOCA_LIMIT
- ? alloca (len * sizeof *wbuf)
- : len <= SIZE_MAX / sizeof *wbuf
- ? malloc (len * sizeof *wbuf)
- : NULL);
- if (wbuf)
- {
- size_t res;
- mbstate_t st;
- const char *tmp = message;
- memset (&st, '\0', sizeof (st));
- res = mbsrtowcs (wbuf, &tmp, len, &st);
- wmessage = res == (size_t) -1 ? L"???" : wbuf;
- }
- __vfwprintf (stderr, wmessage, args);
- if (! (len < ALLOCA_LIMIT))
- free (wbuf);
- }
- else
- #endif
- vfprintf (stderr, message, args);
- va_end (args);
- ++error_message_count;
- if (errnum)
- print_errno_message (errnum);
- #if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- putwc (L'\n', stderr);
- else
- #endif
- putc ('\n', stderr);
- 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
- fflush (stdout);
- #ifdef _LIBC
- _IO_flockfile (stderr);
- #endif
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
- #if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s: ", program_name);
- else
- #endif
- fprintf (stderr, "%s: ", program_name);
- }
- 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
- }
- /* 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
- fflush (stdout);
- #ifdef _LIBC
- _IO_flockfile (stderr);
- #endif
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
- #if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s: ", program_name);
- else
- #endif
- fprintf (stderr, "%s:", program_name);
- }
- if (file_name != NULL)
- {
- #if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
- else
- #endif
- fprintf (stderr, "%s:%d: ", file_name, line_number);
- }
- 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