File fbtest.c of Package kbd.29031
/*
* fbtest(.c)
*
* Copyright 2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.
*
* 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.
*
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <unistd.h>
#include <linux/fb.h>
static struct option options[] = {
{ "fb", required_argument, 0, 'f'},
{ "vc", required_argument, 0, 'C'},
{ "help", no_argument, 0, 'h'},
{ (const char*)0, 0, (int*)0, 0}
};
int main(int argc, char * argv[])
{
struct fb_con2fbmap map = {1, -1};
const char *base = basename(argv[0]);
const char * fb = (char*)0;
const char * vc = (char*)0;
struct stat st;
int c, fd;
opterr = 0;
while ((c = getopt_long(argc, argv, "hf:C:", options, (int *)0)) != -1) {
switch (c) {
case 'f':
fb = optarg;
break;
case 'C':
vc = optarg;
break;
case 'h':
fprintf(stderr, "%s: Usage:\n %s [-f <fb_device>] [-C <vc_device>]\n", base, base);
fprintf(stderr, "Valid options are:\n");
fprintf(stderr, " -f <fb_device> The frame buffer device (default /dev/fb0)\n");
fprintf(stderr, " -C <vc_device> The virtual console device (default /dev/tty1)\n");
return 0;
case '?':
fprintf(stdout, "%s: Invalid option for help use:\n %s --help\n", base, base);
return 1;
break;
default:
break;
}
}
if (fb == (char*)0) {
fb = "/dev/fb/0";
if (stat(fb, &st) < 0) {
if (errno != ENOENT && errno != ENOTDIR) {
fprintf(stderr, "%s: %s: %m\n", base, fb);
return 1;
}
fb = "/dev/fb0";
if (stat(fb, &st) < 0) {
fprintf(stderr, "%s: %s: %m\n", base, fb);
return 1;
}
}
}
if (vc == (char*)0)
vc = "/dev/tty1";
if (stat(vc, &st) < 0) {
fprintf(stderr, "%s: %s: %m\n", base, vc);
return 1;
}
if (major(st.st_rdev) != (dev_t)4) {
errno = ECANCELED;
fprintf(stderr, "%s: %s: %m\n", base, vc);
return 1;
}
if ((fd = open(fb, O_RDONLY|O_NOCTTY)) < 0) {
if (errno != ENODEV)
fprintf(stderr, "%s: %s: %m\n", base, fb);
return 1;
}
map.console = (typeof(map.console))minor(st.st_rdev);
map.framebuffer = (typeof(map.framebuffer))-1;
if (ioctl(fd, FBIOGET_CON2FBMAP, &map) < 0) {
fprintf(stderr, "%s: %s: %m\n", base, fb);
return 1;
}
return map.framebuffer > FB_MAX;
}