123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102 |
- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <thread.h>
- #include <keyboard.h>
- void
- closekeyboard(Keyboardctl *kc)
- {
- if(kc == nil)
- return;
- postnote(PNPROC, kc->pid, "kill");
- #ifdef BUG
- /* Drain the channel */
- while(?kc->c)
- <-kc->c;
- #endif
- close(kc->ctlfd);
- close(kc->consfd);
- free(kc->file);
- free(kc->c);
- free(kc);
- }
- static
- void
- _ioproc(void *arg)
- {
- int m, n;
- char buf[20];
- Rune r;
- Keyboardctl *kc;
- kc = arg;
- threadsetname("kbdproc");
- kc->pid = getpid();
- n = 0;
- for(;;){
- while(n>0 && fullrune(buf, n)){
- m = chartorune(&r, buf);
- n -= m;
- memmove(buf, buf+m, n);
- send(kc->c, &r);
- }
- m = read(kc->consfd, buf+n, sizeof buf-n);
- if(m <= 0){
- yield(); /* if error is due to exiting, we'll exit here */
- fprint(2, "keyboard read error: %r\n");
- threadexits("error");
- }
- n += m;
- }
- }
- Keyboardctl*
- initkeyboard(char *file)
- {
- Keyboardctl *kc;
- char *t;
- kc = mallocz(sizeof(Keyboardctl), 1);
- if(kc == nil)
- return nil;
- if(file == nil)
- file = "/dev/cons";
- kc->file = strdup(file);
- kc->consfd = open(file, ORDWR|OCEXEC);
- t = malloc(strlen(file)+16);
- if(kc->consfd<0 || t==nil){
- Error1:
- free(kc);
- return nil;
- }
- sprint(t, "%sctl", file);
- kc->ctlfd = open(t, OWRITE|OCEXEC);
- if(kc->ctlfd < 0){
- fprint(2, "initkeyboard: can't open %s: %r\n", t);
- Error2:
- close(kc->consfd);
- free(t);
- goto Error1;
- }
- if(ctlkeyboard(kc, "rawon") < 0){
- fprint(2, "initkeyboard: can't turn on raw mode on %s: %r\n", t);
- close(kc->ctlfd);
- goto Error2;
- }
- free(t);
- kc->c = chancreate(sizeof(Rune), 20);
- proccreate(_ioproc, kc, 4096);
- return kc;
- }
- int
- ctlkeyboard(Keyboardctl *kc, char *m)
- {
- return write(kc->ctlfd, m, strlen(m));
- }
|