113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
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/*
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* fbtest(.c)
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*
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* Copyright 2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <linux/fb.h>
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static struct option options[] = {
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{ "fb", required_argument, 0, 'f'},
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{ "vc", required_argument, 0, 'C'},
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{ "help", no_argument, 0, 'h'},
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{ (const char*)0, 0, (int*)0, 0}
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};
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int main(int argc, char * argv[])
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{
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struct fb_con2fbmap map = {1, -1};
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const char *base = basename(argv[0]);
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const char * fb = (char*)0;
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const char * vc = (char*)0;
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struct stat st;
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int c, fd;
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opterr = 0;
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while ((c = getopt_long(argc, argv, "hf:C:", options, (int *)0)) != -1) {
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switch (c) {
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case 'f':
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fb = optarg;
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break;
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case 'C':
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vc = optarg;
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break;
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case 'h':
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fprintf(stderr, "%s: Usage:\n %s [-f <fb_device>] [-C <vc_device>]\n", base, base);
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fprintf(stderr, "Valid options are:\n");
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fprintf(stderr, " -f <fb_device> The frame buffer device (default /dev/fb0)\n");
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fprintf(stderr, " -C <vc_device> The virtual console device (default /dev/tty1)\n");
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return 0;
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case '?':
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fprintf(stdout, "%s: Invalid option for help use:\n %s --help\n", base, base);
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return 1;
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break;
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default:
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break;
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}
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}
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if (fb == (char*)0) {
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fb = "/dev/fb/0";
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if (stat(fb, &st) < 0) {
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if (errno != ENOENT && errno != ENOTDIR) {
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fprintf(stderr, "%s: %s: %m\n", base, fb);
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return 1;
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}
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fb = "/dev/fb0";
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if (stat(fb, &st) < 0) {
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fprintf(stderr, "%s: %s: %m\n", base, fb);
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return 1;
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}
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}
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}
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if (vc == (char*)0)
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vc = "/dev/tty1";
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if (stat(vc, &st) < 0) {
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fprintf(stderr, "%s: %s: %m\n", base, vc);
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return 1;
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}
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if (major(st.st_rdev) != (dev_t)4) {
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errno = ECANCELED;
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fprintf(stderr, "%s: %s: %m\n", base, vc);
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return 1;
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}
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if ((fd = open(fb, O_RDONLY|O_NOCTTY)) < 0) {
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if (errno != ENODEV)
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fprintf(stderr, "%s: %s: %m\n", base, fb);
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return 1;
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}
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map.console = (typeof(map.console))minor(st.st_rdev);
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map.framebuffer = (typeof(map.framebuffer))-1;
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if (ioctl(fd, FBIOGET_CON2FBMAP, &map) < 0) {
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fprintf(stderr, "%s: %s: %m\n", base, fb);
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return 1;
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}
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return map.framebuffer > FB_MAX;
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}
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