mirror of
https://github.com/mpv-player/mpv
synced 2024-12-11 09:25:56 +00:00
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
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/* this is userspace utility which allows you to redirect console to another fb device
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* You can specify devices & consoles by both numbers and devices. Framebuffers numbers
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* are zero based (/dev/fb0 ... ), consoles begins with 1 (/dev/tty1 ... )
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*/
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#include <linux/fb.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int main(int argc, char* argv[]) {
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struct fb_con2fbmap c2m;
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char* fbPath;
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u_int32_t con, fb;
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char* e;
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char* progname = strrchr(argv[0], '/');
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int f;
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if (progname)
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progname++;
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else
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progname = argv[0];
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if (argc < 3) {
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fprintf(stderr, "usage: %s fbdev console\n", progname);
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return 1;
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}
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fb = strtoul(argv[1], &e, 10);
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if (*e) {
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struct stat sbf;
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if (stat(argv[1], &sbf)) {
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fprintf(stderr, "%s: are you sure that %s can be used to describe fbdev?\n", progname, argv[1]);
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return 1;
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}
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if (!S_ISCHR(sbf.st_mode)) {
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fprintf(stderr, "%s: %s must be character device\n", progname, argv[1]);
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return 1;
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}
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fb = sbf.st_rdev & 0xFF;
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if (fb >= 32)
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fb >>= 5;
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fbPath = argv[1];
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} else
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fbPath = "/dev/fb0";
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con = strtoul(argv[2], &e, 10);
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if (*e) {
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struct stat sbf;
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if (stat(argv[2], &sbf)) {
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fprintf(stderr, "%s: are you sure that %s can be used to describe vt?\n", progname, argv[2]);
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return 1;
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}
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if (!S_ISCHR(sbf.st_mode)) {
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fprintf(stderr, "%s: %s must be character device\n", progname, argv[2]);
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return 1;
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}
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con = sbf.st_rdev & 0xFF;
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}
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c2m.console = con;
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c2m.framebuffer = fb;
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f = open(fbPath, O_RDWR);
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if (f < 0) {
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fprintf(stderr, "%s: Cannot open %s\n", progname, fbPath);
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return 1;
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}
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if (ioctl(f, FBIOPUT_CON2FBMAP, &c2m)) {
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fprintf(stderr, "%s: Cannot set console mapping\n", progname);
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close(f);
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return 1;
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}
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close(f);
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return 0;
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}
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