| 1 | #include <stdio.h> |
| 2 | #include <sys/types.h> |
| 3 | #include <sys/stat.h> |
| 4 | #include <fcntl.h> |
| 5 | #include <unistd.h> |
| 6 | #include <sys/ioctl.h> |
| 7 | #include <linux/fb.h> |
| 8 | #include <linux/kd.h> |
| 9 | |
| 10 | int main() |
| 11 | { |
| 12 | struct fb_var_screeninfo fbvar; |
| 13 | int ret, fbdev, kbdfd; |
| 14 | |
| 15 | fbdev = open("/dev/fb0", O_RDWR); |
| 16 | if (fbdev == -1) { |
| 17 | perror("open"); |
| 18 | return 1; |
| 19 | } |
| 20 | |
| 21 | ret = ioctl(fbdev, FBIOGET_VSCREENINFO, &fbvar); |
| 22 | if (ret == -1) { |
| 23 | perror("FBIOGET_VSCREENINFO ioctl"); |
| 24 | goto end_fb; |
| 25 | } |
| 26 | |
| 27 | if (fbvar.yoffset != 0) { |
| 28 | printf("fixing yoffset.. "); |
| 29 | fbvar.yoffset = 0; |
| 30 | ret = ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar); |
| 31 | if (ret < 0) |
| 32 | perror("ioctl FBIOPAN_DISPLAY"); |
| 33 | else |
| 34 | printf("ok\n"); |
| 35 | } |
| 36 | |
| 37 | end_fb: |
| 38 | close(fbdev); |
| 39 | |
| 40 | kbdfd = open("/dev/tty", O_RDWR); |
| 41 | if (kbdfd == -1) { |
| 42 | perror("open /dev/tty"); |
| 43 | return 1; |
| 44 | } |
| 45 | |
| 46 | if (ioctl(kbdfd, KDSETMODE, KD_TEXT) == -1) |
| 47 | perror("KDSETMODE KD_TEXT"); |
| 48 | |
| 49 | close(kbdfd); |
| 50 | |
| 51 | return 0; |
| 52 | } |