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/*
* Zapping (TV viewer for the Gnome Desktop)
*
* Copyright (C) 2000 Iaki Garca Etxebarria
* Copyright (C) 2003-2004 Michael H. Schimek
*
* 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 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: zapping_setup_fb.h,v 1.10 2006/02/25 17:34:36 mschimek Exp $ */
#ifndef ZAPPING_SETUP_FB_H
#define ZAPPING_SETUP_FB_H
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "libtv/screen.h" /* Xinerama & DGA interface */
#include "common/device.h" /* generic device access routines */
#define ROOT_UID 0
/* Keep this in sync with tveng.c. */
typedef enum {
ZSFB_SUCCESS = EXIT_SUCCESS,
ZSFB_BUG = 60,
ZSFB_NO_PERMISSION,
ZSFB_NO_SCREEN,
ZSFB_INVALID_BPP,
ZSFB_BAD_DEVICE_NAME,
ZSFB_BAD_DEVICE_FD,
ZSFB_UNKNOWN_DEVICE,
ZSFB_OPEN_ERROR,
ZSFB_IOCTL_ERROR,
ZSFB_OVERLAY_IMPOSSIBLE,
} zsfb_status;
#ifdef HAVE_GNU_C_VARIADIC_MACROS
# define errmsg(template, args...) \
error_message (__FILE__, __LINE__, template , ##args)
# define errmsg_ioctl(name, errno) \
error_message (__FILE__, __LINE__, _("Ioctl %s failed: %s."), \
name, strerror (errno))
#else
# error Compiler does not support GNU C variadic macros
#endif
#define privilege_hint() \
message (/* verbosity */ 1, \
"%s must run with root privileges.\n" \
"Try consolehelper, sudo, su or set the SUID flag with " \
"chmod +s.\n", program_invocation_name);
#if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ >= 4
# define _zsfb_nonnull(args...) nonnull(args)
#else
# define _zsfb_nonnull(args...)
#endif
extern char * program_invocation_name;
extern char * program_invocation_short_name;
extern int verbosity;
extern unsigned int uid;
extern unsigned int euid;
extern FILE * device_log_fp;
extern void
drop_root_privileges (void);
extern zsfb_status
restore_root_privileges (void);
extern void
message (int level,
const char * template,
...)
__attribute__ ((format (printf, 2, 3)));
extern void
error_message (const char * file,
unsigned int line,
const char * template,
...)
__attribute__ ((_zsfb_nonnull (1), format (printf, 3, 4)));
extern zsfb_status
device_open_safer (int * fd,
const char * device_name,
int device_fd,
unsigned int major_number,
unsigned int flags)
__attribute__ ((_zsfb_nonnull (1)));
extern zsfb_status
setup_v4l (const char * device_name,
int device_fd,
const tv_overlay_buffer *buffer)
__attribute__ ((_zsfb_nonnull (3)));
extern zsfb_status
setup_v4l2 (const char * device_name,
int device_fd,
const tv_overlay_buffer *buffer)
__attribute__ ((_zsfb_nonnull (3)));
extern zsfb_status
setup_v4l25 (const char * device_name,
int device_fd,
const tv_overlay_buffer *buffer)
__attribute__ ((_zsfb_nonnull (3)));
#endif /* ZAPPING_SETUP_FB_H */
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