| Summary: | showkey shows wrong raw scancodes | ||
|---|---|---|---|
| Product: | Busybox | Reporter: | Steffen Daode Nurpmeso <sdaoden> |
| Component: | Other | Assignee: | unassigned |
| Status: | RESOLVED FIXED | ||
| Severity: | enhancement | CC: | busybox-cvs |
| Priority: | P5 | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Host: | Target: | ||
| Build: | |||
Hrmpf. Ok. Well it was so nice because FreeBSD and OpenBSD versions are reproducably correct, and using the algorithm on Linux just came up with the same keycodes that are correct for the mentioned nicely documented OSs... Since you've been silent i've prepared kbd-1.12 on TinyCore4.4 and indeed - ouch - dumpkeys(1) (and showkey(1)) agrees with you, and throws me down into the hell of idiots. My Linux error was that i've used _RAW not _MEDIUMRAW. So *sorry for the noise*. If i'll fail to close this ticket of shame, would anyone who is capable to work with bug trackers do it for me, once in a while? Thanks. |
When i try out the code from the showkey applet in busybox it gives me completely wrong scancodes. The following code gives correct scancodes, but since i've never read the kernel sources it may not get all cases correctly. (It's from my own showkey.c that works on {Open,Free}BSD and Linux. The "kernel sources" is still true though..) static ssize_t mode_keycode(unsigned char *buf, ssize_t len) { unsigned char *cursor; for (cursor = buf; --len >= 0;) { unsigned int isplain = 1, kc = *cursor++, rc = kc, isdown; if ((rc & 0xF0) == 0xE0 || (rc & 0xF8) == 0xF0) { isplain = 0; if (--len < 0) { *buf = (unsigned char)rc; len = 1; break; } kc <<= 8; kc |= *cursor++; rc = kc; kc &= ((kc & 0xF000) == 0xE000) ? 0x0FFF : 0x00FF; } isdown = (0 == (kc & 0x80)); kc &= ~0x0080; if (! isplain) kc |= 0x80; printf("keycode %3u %-7s (0x%04X: 0x%04X | %c)\r\n", kc, (isdown ? "press" : "release"), rc, kc, (isdown ? 'v' : '^')); } return ((len <= 0) ? 0 : len); }