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libdraw: don't loop forever when getting eof on /dev/cons in keyboard ioproc

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This commit is contained in:
cinap_lenrek 2015-05-19 20:04:47 +02:00
parent 8f8c2d6779
commit 6198954859
1 changed files with 15 additions and 6 deletions
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21
sys/src/libdraw/keyboard.c
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@ -19,7 +19,7 @@ static
void
_ioproc(void *arg)
{
int m, n;
int m, n, nerr;
char buf[20];
Rune r;
Keyboardctl *kc;
@ -27,18 +27,27 @@ _ioproc(void *arg)
kc = arg;
threadsetname("kbdproc");
n = 0;
loop:
nerr = 0;
while(kc->consfd >= 0){
m = read(kc->consfd, buf+n, sizeof buf-n);
if(m <= 0){
yield(); /* if error is due to exiting, we'll exit here */
if(kc->consfd < 0)
break;
fprint(2, "keyboard: short read: %r\n");
if(m<0 || ++nerr>10)
threadexits("read error");
continue;
}
nerr = 0;
n += m;
while(n>0 && fullrune(buf, n)){
m = chartorune(&r, buf);
n -= m;
memmove(buf, buf+m, n);
if(send(kc->c, &r) < 0)
goto loop;
break;
}
if((m = read(kc->consfd, buf+n, sizeof buf-n)) <= 0)
goto loop;
n += m;
}
chanfree(kc->c);
free(kc->file);