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X gets a VT: keyboard, terminal switching, and a way out

Browse source 
Xorg uses VTs only when stat("/dev/tty0") reports Linux's tty major 4.
SchOS's terminals sit under major 1, so X ran on no VT at all: the console
kept drawing over it, Ctrl+Alt+F-keys did nothing, and nothing ended the
session. stat now reports terminals under Linux's numbers.

startx picks the VT only when uname says Linux, so root's xserverrc passes
the current one itself. An xorg.conf.d file names X's input devices, since
Alpine's Xorg looks them up through udev and SchOS has none yet.

Alt+F1..F6 and Ctrl+Alt+F1..F6 now switch terminals as on Linux, alongside
the settable chord. USB keyboards gain arrows, Home/End/PgUp/PgDn/Ins/Del
and the switch keys, which the PS/2 path always had.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-24 21:45:50 +02:00
commit 4a7165c951
5 changed files with 123 additions and 9 deletions
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10
kernel/dev/kbd.c
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@ -152,6 +152,16 @@ kbdgetc(void)
if (data == SCAN_EQUALS) return KBD_VT_NEXT;
}
// And Linux's own: Alt+F1..F6 and Ctrl+Alt+F1..F6, whatever the chord is set
// to. These are what anyone who has used Linux presses, on a real machine,
// and nothing reached them: SchOS answered only AltGr+F-keys, which no one
// thinks to try. Under X the terminal is in VT_PROCESS, console_vt_hotkey()
// lets the keys through, and X switches with them itself -- as on Linux.
if (data >= SCAN_F1 && data < SCAN_F1 + NVT &&
((shift & (CTL | SHIFT | ALT | RALT)) == ALT ||
(shift & (CTL | SHIFT | ALT | RALT)) == (CTL | ALT)))
return KBD_VT_SWITCH + (data - SCAN_F1);
cp = keymap_lookup(data, shift);
if (cp == 0)
return 0;