ref: 21336d544ae90e20070fd7c8be67f3f2c9ccbe38
dir: /os/port/devcons.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include <version.h>
#include "mp.h"
#include "libsec.h"
#include "keyboard.h"
extern int cflag;
extern int keepbroken;
void (*serwrite)(char *, int);
void (*consdebug)(void) = nil;
void (*screenputs)(char*, int) = nil;
Queue* serialoq; /* serial console output */
Queue* kprintoq; /* console output, for /dev/kprint */
ulong kprintinuse; /* test and set whether /dev/kprint is open */
int iprintscreenputs = 1;
int panicking;
/* below until kbdfs */
int mouseshifted;
Queue* kbdq; /* unprocessed console input */
Queue* lineq; /* processed console input */
static struct
{
QLock;
int raw; /* true if we shouldn't process input */
int ctl; /* number of opens to the control file */
int kbdr; /* number of open reads to the keyboard */
int scan; /* true if reading raw scancodes */
int x; /* index into line */
char line[1024]; /* current input line */
char c;
int count;
int repeat;
} kbd;
/* above until kbdfs */
char* sysname;
char* eve;
enum
{
CMreboot,
CMhalt,
CMpanic,
CMbroken,
CMnobroken,
CMconsole,
};
static Cmdtab sysctlcmd[] =
{
CMreboot, "reboot", 0,
CMhalt, "halt", 0,
CMpanic, "panic", 0,
CMconsole, "console", 1,
CMbroken, "broken", 0,
CMnobroken, "nobroken", 0,
};
void
printinit(void)
{
}
/*
* return true if current user is eve
*/
int
iseve(void)
{
Osenv *o;
o = up->env;
return strcmp(eve, o->user) == 0;
}
static int
consactive(void)
{
if(serialoq)
return qlen(serialoq) > 0;
return 0;
}
static void
prflush(void)
{
ulong now;
now = m->ticks;
while(consactive())
if(m->ticks - now >= HZ)
break;
}
static void
kmesgputs(char *str, int n)
{
uint nn, d;
ilock(&kmesg.lk);
/* take the tail of huge writes */
if(n > sizeof kmesg.buf){
d = n - sizeof kmesg.buf;
str += d;
n -= d;
}
/* slide the buffer down to make room */
nn = kmesg.n;
if(nn + n >= sizeof kmesg.buf){
d = nn + n - sizeof kmesg.buf;
if(d)
memmove(kmesg.buf, kmesg.buf+d, sizeof kmesg.buf-d);
nn -= d;
}
/* copy the data in */
memmove(kmesg.buf+nn, str, n);
nn += n;
kmesg.n = nn;
iunlock(&kmesg.lk);
}
/*
* Print a string on the console. Convert \n to \r\n for serial
* line consoles. Locking of the queues is left up to the screen
* or uart code. Multi-line messages to serial consoles may get
* interspersed with other messages.
*/
static void
putstrn0(char *str, int n, int usewrite)
{
int m;
char *t;
int (*wq)(Queue*, void*, int);
/*
* how many different output devices do we need?
*/
kmesgputs(str, n);
/*
* if someone is reading /dev/kprint,
* put the message there.
* if not and there's an attached bit mapped display,
* put the message there.
*
* if there's a serial line being used as a console,
* put the message there.
*/
wq = usewrite && islo() ? qwrite : qiwrite;
if(kprintoq != nil && !qisclosed(kprintoq)){
(*wq)(kprintoq, str, n);
}else if(screenputs != nil){
screenputs(str, n);
}
if(serialoq == nil){
uartputs(str, n);
return;
}
while(n > 0) {
t = memchr(str, '\n', n);
if(t != nil) {
m = t-str;
(*wq)(serialoq, str, m);
(*wq)(serialoq, "\r\n", 2);
n -= m+1;
str = t+1;
} else {
(*wq)(serialoq, str, n);
break;
}
}
}
void
putstrn(char *str, int n)
{
putstrn0(str, n, 0);
}
int
snprint(char *s, int n, char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
n = vseprint(s, s+n, fmt, arg) - s;
va_end(arg);
return n;
}
int
sprint(char *s, char *fmt, ...)
{
int n;
va_list arg;
va_start(arg, fmt);
n = vseprint(s, s+PRINTSIZE, fmt, arg) - s;
va_end(arg);
return n;
}
int
print(char *fmt, ...)
{
int n;
va_list arg;
char buf[PRINTSIZE];
va_start(arg, fmt);
n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
putstrn(buf, n);
return n;
}
int
fprint(int fd, char *fmt, ...)
{
int n;
va_list arg;
char buf[PRINTSIZE];
USED(fd);
va_start(arg, fmt);
n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
putstrn(buf, n);
return n;
}
/*
* Want to interlock iprints to avoid interlaced output on
* multiprocessor, but don't want to deadlock if one processor
* dies during print and another has something important to say.
* Make a good faith effort.
*/
static Lock iprintlock;
static int
iprintcanlock(Lock *l)
{
int i;
for(i=0; i<1000; i++){
if(canlock(l))
return 1;
if(l->m == MACHP(m->machno))
return 0;
microdelay(100);
}
return 0;
}
int
iprint(char *fmt, ...)
{
int n, s, locked;
va_list arg;
char buf[PRINTSIZE];
s = splhi();
va_start(arg, fmt);
n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
locked = iprintcanlock(&iprintlock);
if(screenputs != nil && iprintscreenputs)
screenputs(buf, n);
uartputs(buf, n);
if(locked)
unlock(&iprintlock);
splx(s);
return n;
}
void
panic(char *fmt, ...)
{
int s;
va_list arg;
char buf[PRINTSIZE];
kprintoq = nil; /* don't try to write to /dev/kprint */
if(panicking)
for(;;);
panicking = 1;
s = splhi();
strcpy(buf, "panic: ");
va_start(arg, fmt);
vseprint(buf+strlen(buf), buf+sizeof(buf), fmt, arg);
va_end(arg);
iprint("%s\n", buf);
if(consdebug)
(*consdebug)();
splx(s);
prflush();
dumpstack();
/* reboot cpu servers and headless machines when not debugging */
if(getconf("*debug") == nil)
if(!conf.monitor)
exit(1);
/* otherwise, just hang */
while(islo()) idlehands();
for(;;);
}
void
_assert(char *fmt)
{
panic("assert failed at %#p: %s", getcallerpc(&fmt), fmt);
}
/*
* mainly for libmp
*/
void
sysfatal(char *fmt, ...)
{
char err[256];
va_list arg;
va_start(arg, fmt);
vseprint(err, err + sizeof err, fmt, arg);
va_end(arg);
panic("sysfatal: %s", err);
}
int
pprint(char *fmt, ...)
{
int n;
Chan *c;
va_list arg;
char buf[2*PRINTSIZE];
if(up == nil || up->env->fgrp == nil)
return 0;
c = up->env->fgrp->fd[2];
if(c==nil || (c->flag&CMSG)!=0 || (c->mode!=OWRITE && c->mode!=ORDWR))
return 0;
n = snprint(buf, sizeof buf, "%s %ud: ", up->text, up->pid);
va_start(arg, fmt);
n = vseprint(buf+n, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
if(waserror())
return 0;
devtab[c->type]->write(c, buf, n, c->offset);
poperror();
lock(c);
c->offset += n;
unlock(c);
return n;
}
enum{
Qdir,
Qcons,
Qsysctl,
Qconsctl,
Qdrivers,
Qhostowner,
Qkeyboard,
Qklog, /* same as 9front's kmesg */
Qkprint, /* tail of kprint's and cons. Why not just a tail of klog? Why is this needed? */
Qscancode,
Qmemory,
Qmsec,
Qnull,
Qrandom,
Qnotquiterandom,
Qsysname,
Qtime,
Quser,
Qjit,
};
static Dirtab consdir[]=
{
".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
"cons", {Qcons}, 0, 0660,
"sysctl", {Qsysctl}, 0, 0644,
"drivers", {Qdrivers}, 0, 0444,
"hostowner", {Qhostowner}, 0, 0644,
"keyboard", {Qkeyboard}, 0, 0666,
"klog", {Qklog}, 0, 0444,
"kprint", {Qkprint}, 0, 0444,
"scancode", {Qscancode}, 0, 0444,
"memory", {Qmemory}, 0, 0444,
"msec", {Qmsec}, NUMSIZE, 0444,
"null", {Qnull}, 0, 0666,
"random", {Qrandom}, 0, 0444,
"notquiterandom", {Qnotquiterandom}, 0, 0444,
"sysname", {Qsysname}, 0, 0664,
"time", {Qtime}, 0, 0664,
"user", {Quser}, 0, 0644,
"jit", {Qjit}, 0, 0666,
};
ulong boottime; /* seconds since epoch at boot */
long
seconds(void)
{
return boottime + TK2SEC(MACHP(0)->ticks);
}
vlong
mseconds(void)
{
return ((vlong)boottime*1000)+((vlong)(TK2MS(MACHP(0)->ticks)));
}
vlong
osusectime(void)
{
return (((vlong)boottime*1000)+((vlong)(TK2MS(MACHP(0)->ticks)))*1000);
}
vlong
nsec(void)
{
return osusectime()*1000; /* TO DO */
}
int
readnum(ulong off, char *buf, ulong n, ulong val, int size)
{
char tmp[64];
if(size > 64) size = 64;
snprint(tmp, sizeof(tmp), "%*.0lud ", size, val);
if(off >= size)
return 0;
if(off+n > size)
n = size-off;
memmove(buf, tmp+off, n);
return n;
}
int
readstr(ulong off, char *buf, ulong n, char *str)
{
int size;
size = strlen(str);
if(off >= size)
return 0;
if(off+n > size)
n = size-off;
memmove(buf, str+off, n);
return n;
}
void
fddump()
{
Proc *p;
Osenv *o;
int i;
Chan *c;
p = proctab(6);
o = p->env;
for(i = 0; i <= o->fgrp->maxfd; i++) {
if((c = o->fgrp->fd[i]) == nil)
continue;
print("%d: %s\n", i, c->name == nil? "???": c->name->s);
}
}
static void
qpanic(Rune)
{
panic("User requested panic.");
}
static void
rexit(Rune)
{
exit(0);
}
static void
consinit(void)
{
/* below until kbdfs is built */
if(lineq == nil){
lineq = qopen(2*1024, 0, nil, nil);
if(lineq == nil)
panic("consinit");
qnoblock(lineq, 1);
}
if(kbdq == nil){
kbdq = qopen(4*1024, 0, 0, 0);
if(kbdq == nil)
panic("consinit");
qnoblock(kbdq, 1);
}
/* above until kbdfs is built */
todinit();
randominit();
/*
debugkey('f', "files/6", fddump, 0);
debugkey('q', "panic", qpanic, 1);
debugkey('r', "exit", rexit, 1);
*/
}
static Chan*
consattach(char *spec)
{
return devattach('c', spec);
}
static Walkqid*
conswalk(Chan *c, Chan *nc, char **name, s32 nname)
{
return devwalk(c, nc, name, nname, consdir, nelem(consdir), devgen);
}
static s32
consstat(Chan *c, uchar *dp, s32 n)
{
return devstat(c, dp, n, consdir, nelem(consdir), devgen);
}
static Chan*
consopen(Chan *c, u32 omode)
{
c->aux = nil;
c = devopen(c, omode, consdir, nelem(consdir), devgen);
switch((u64)c->qid.path){
case Qkprint:
if(tas(&kprintinuse) != 0){
c->flag &= ~COPEN;
error(Einuse);
}
if(kprintoq == nil){
kprintoq = qopen(8*1024, Qcoalesce, 0, 0);
if(kprintoq == nil){
c->flag &= ~COPEN;
error(Enomem);
}
qnoblock(kprintoq, 1);
}else
qreopen(kprintoq);
c->iounit = qiomaxatomic;
break;
}
return c;
}
static void
consclose(Chan *c)
{
switch((u64)c->qid.path){
/* close of kprint allows other opens */
case Qkprint:
if(c->flag & COPEN){
kprintinuse = 0;
qhangup(kprintoq, nil);
}
break;
}
}
static s32
consread(Chan *c, void *buf, s32 n, s64 offset)
{
int l;
Osenv *o;
int i;
char *p, tmp[128];
if(n <= 0)
return n;
o = up->env;
switch((u64)c->qid.path){
case Qdir:
return devdirread(c, buf, n, consdir, nelem(consdir), devgen);
case Qsysctl:
return readstr(offset, buf, n, VERSION);
case Qcons:
/* below belongs in kbdfs */
qlock(&kbd);
if(waserror()) {
qunlock(&kbd);
nexterror();
}
if(kbd.raw || kbd.kbdr) {
if(qcanread(lineq))
n = qread(lineq, buf, n);
else {
/* read as much as possible */
char *cbuf = buf;
do {
i = qread(kbdq, cbuf, n);
cbuf += i;
n -= i;
} while(n>0 && qcanread(kbdq));
n = cbuf - (char*)buf;
}
} else {
int ch, eol;
while(!qcanread(lineq)) {
qread(kbdq, &kbd.line[kbd.x], 1);
ch = kbd.line[kbd.x];
eol = 0;
switch(ch){
case '\b':
if(kbd.x)
kbd.x--;
break;
case 0x15:
kbd.x = 0;
break;
case '\n':
case 0x04:
eol = 1;
default:
kbd.line[kbd.x++] = ch;
break;
}
if(kbd.x == sizeof(kbd.line) || eol) {
if(ch == 0x04)
kbd.x--;
qwrite(lineq, kbd.line, kbd.x);
kbd.x = 0;
}
}
n = qread(lineq, buf, n);
}
qunlock(&kbd);
poperror();
return n;
/* above belongs in kbdfs */
/* commented until the above is removed
error(Egreg); */
case Qtime:
snprint(tmp, sizeof(tmp), "%.lld", (vlong)mseconds()*1000);
return readstr(offset, buf, n, tmp);
case Qhostowner:
return readstr(offset, buf, n, eve);
case Quser:
return readstr(offset, buf, n, o->user);
case Qjit:
snprint(tmp, sizeof(tmp), "%d", cflag);
return readstr(offset, buf, n, tmp);
case Qnull:
return 0;
case Qmsec:
return readnum(offset, buf, n, TK2MS(MACHP(0)->ticks), NUMSIZE);
case Qsysname:
if(sysname == nil)
return 0;
return readstr(offset, buf, n, sysname);
case Qnotquiterandom:
genrandom(buf, n);
return n;
case Qrandom:
return randomread(buf, n);
case Qmemory:
return poolread(buf, n, offset);
case Qdrivers:
p = malloc(READSTR);
if(p == nil)
error(Enomem);
l = 0;
for(i = 0; devtab[i] != nil; i++)
l += snprint(p+l, READSTR-l, "#%C %s\n", devtab[i]->dc, devtab[i]->name);
if(waserror()){
free(p);
nexterror();
}
n = readstr(offset, buf, n, p);
free(p);
poperror();
return n;
case Qklog:
/*
* This is unlocked to avoid tying up a process
* that's writing to the buffer. kmesg.n never
* gets smaller, so worst case the reader will
* see a slurred buffer.
*/
if(offset >= kmesg.n)
n = 0;
else{
if(offset+n > kmesg.n)
n = kmesg.n - offset;
memmove(buf, kmesg.buf+offset, n);
}
return n;
case Qkprint:
return qread(kprintoq, buf, n);
default:
print("consread %llud\n", c->qid.path);
error(Egreg);
}
return -1; /* never reached */
}
static s32
conswrite(Chan *c, void *va, s32 n, s64 offset)
{
s64 t;
long l, bp;
char *a = va;
Cmdbuf *cb;
Cmdtab *ct;
char buf[256];
int x;
switch((u64)c->qid.path){
case Qcons:
/*
* Can't page fault in putstrn, so copy the data locally.
*/
l = n;
while(l > 0){
bp = l;
if(bp > sizeof buf)
bp = sizeof buf;
memmove(buf, a, bp);
putstrn0(a, bp, 1);
a += bp;
l -= bp;
}
break;
case Qconsctl:
error(Egreg);
case Qtime:
if(n >= sizeof(buf))
n = sizeof(buf)-1;
strncpy(buf, a, n);
buf[n] = 0;
t = strtoll(buf, 0, 0)/1000000;
boottime = t - TK2SEC(MACHP(0)->ticks);
break;
case Qhostowner:
if(!iseve())
error(Eperm);
if(offset != 0 || n >= sizeof(buf))
error(Ebadarg);
memmove(buf, a, n);
buf[n] = '\0';
if(n > 0 && buf[n-1] == '\n')
buf[--n] = 0;
if(n <= 0)
error(Ebadarg);
renameuser(eve, buf);
renameproguser(eve, buf);
kstrdup(&eve, buf);
kstrdup(&up->env->user, buf);
break;
case Quser:
if(!iseve())
error(Eperm);
if(offset != 0)
error(Ebadarg);
if(n <= 0 || n >= sizeof(buf))
error(Ebadarg);
strncpy(buf, a, n);
buf[n] = 0;
if(buf[n-1] == '\n')
buf[n-1] = 0;
kstrdup(&up->env->user, buf);
break;
case Qjit:
if(n >= sizeof(buf))
n = sizeof(buf)-1;
strncpy(buf, va, n);
buf[n] = '\0';
x = atoi(buf);
if(x < 0 || x > 9)
error(Ebadarg);
cflag = x;
return n;
case Qnull:
break;
case Qsysname:
if(offset != 0)
error(Ebadarg);
if(n <= 0 || n >= sizeof(buf))
error(Ebadarg);
strncpy(buf, a, n);
buf[n] = 0;
if(buf[n-1] == '\n')
buf[n-1] = 0;
kstrdup(&sysname, buf);
break;
case Qsysctl:
if(!iseve())
error(Eperm);
cb = parsecmd(a, n);
if(waserror()){
free(cb);
nexterror();
}
ct = lookupcmd(cb, sysctlcmd, nelem(sysctlcmd));
switch(ct->index){
case CMreboot:
reboot();
break;
case CMhalt:
halt();
break;
case CMpanic:
panic("sysctl");
case CMconsole:
consoleprint = strcmp(cb->f[1], "off") != 0;
break;
case CMbroken:
keepbroken = 1;
break;
case CMnobroken:
keepbroken = 0;
break;
}
poperror();
free(cb);
break;
default:
print("conswrite: %llud\n", c->qid.path);
error(Egreg);
}
return n;
}
Dev consdevtab = {
'c',
"cons",
devreset,
consinit,
devshutdown,
consattach,
conswalk,
consstat,
consopen,
devcreate,
consclose,
consread,
devbread,
conswrite,
devbwrite,
devremove,
devwstat,
};
static ulong randn;
static void
seedrand(void)
{
randomread((void*)&randn, sizeof(randn));
}
int
nrand(int n)
{
if(randn == 0)
seedrand();
randn = randn*1103515245 + 12345 + MACHP(0)->ticks;
return (randn>>16) % n;
}
int
rand(void)
{
nrand(1);
return randn;
}
ulong
truerand(void)
{
ulong x;
randomread(&x, sizeof(x));
return x;
}
/* all the below belongs in kbdfs */
/*
* The codes at 0x79 and 0x81 are produed by the PFU Happy Hacking keyboard.
* A 'standard' keyboard doesn't produce anything above 0x58.
*/
Rune kbtab[] =
{
[0x00] No, 0x1b, '1', '2', '3', '4', '5', '6',
[0x08] '7', '8', '9', '0', '-', '=', '\b', '\t',
[0x10] 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
[0x18] 'o', 'p', '[', ']', '\n', LCtrl, 'a', 's',
[0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
[0x28] '\'', '`', Shift, '\\', 'z', 'x', 'c', 'v',
[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, '*',
[0x38] Latin, ' ', LCtrl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', No, No, No, KF|11,
[0x58] KF|12, No, No, No, No, No, No, No,
[0x60] No, No, No, No, No, No, No, No,
[0x68] No, No, No, No, No, No, No, No,
[0x70] No, No, No, No, No, No, No, No,
[0x78] No, View, No, Up, No, No, No, No,
};
Rune kbtabshift[] =
{
[0x00] No, 0x1b, '!', '@', '#', '$', '%', '^',
[0x08] '&', '*', '(', ')', '_', '+', '\b', '\t',
[0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
[0x18] 'O', 'P', '{', '}', '\n', LCtrl, 'A', 'S',
[0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
[0x28] '"', '~', Shift, '|', 'Z', 'X', 'C', 'V',
[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, '*',
[0x38] Latin, ' ', LCtrl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', No, No, No, KF|11,
[0x58] KF|12, No, No, No, No, No, No, No,
[0x60] No, No, No, No, No, No, No, No,
[0x68] No, No, No, No, No, No, No, No,
[0x70] No, No, No, No, No, No, No, No,
[0x78] No, Up, No, Up, No, No, No, No,
};
Rune kbtabesc1[] =
{
[0x00] No, No, No, No, No, No, No, No,
[0x08] No, No, No, No, No, No, No, No,
[0x10] No, No, No, No, No, No, No, No,
[0x18] No, No, No, No, '\n', LCtrl, No, No,
[0x20] No, No, No, No, No, No, No, No,
[0x28] No, No, Shift, No, No, No, No, No,
[0x30] No, No, No, No, No, '/', No, Print,
[0x38] Latin, No, No, No, No, No, No, No,
[0x40] No, No, No, No, No, No, Break, Home,
[0x48] Up, Pgup, No, Left, No, Right, No, End,
[0x50] Down, Pgdown, Ins, Del, No, No, No, No,
[0x58] No, No, No, No, No, No, No, No,
[0x60] No, No, No, No, No, No, No, No,
[0x68] No, No, No, No, No, No, No, No,
[0x70] No, No, No, No, No, No, No, No,
[0x78] No, Up, No, No, No, No, No, No,
};
void
echo(Rune r, char *buf, int n)
{
if(kbd.raw)
return;
if(r == 0x15){
buf = "^U\n";
n = 3;
}
putstrn(buf, n);
}
/*
* Put character, possibly a rune, into read queue at interrupt time.
* Performs translation for compose sequences
* Called at interrupt time to process a character.
*/
int
kbdputc(Queue *q, int ch)
{
int n;
char buf[UTFmax] = "";
Rune r;
static Rune kc[15];
static int nk, collecting = 0;
r = ch;
if(r == Latin) {
collecting = 1;
nk = 0;
return 0;
}
if(collecting) {
int c;
nk += runetochar((char*)&kc[nk], &r);
c = latin1(kc, nk);
if(c < -1) /* need more keystrokes */
return 0;
collecting = 0;
if(c == -1) { /* invalid sequence */
echo(kc[0], (char*)kc, nk);
qproduce(q, kc, nk);
return 0;
}
r = (Rune)c;
}
kbd.c = r;
n = runetochar(buf, &r);
if(n == 0)
return 0;
echo(r, buf, n);
qproduce(q, buf, n);
return 0;
}
void
kbdrepeat(int rep)
{
kbd.repeat = rep;
kbd.count = 0;
}
void
kbdclock(void)
{
if(kbd.repeat == 0)
return;
if(kbd.repeat==1 && ++kbd.count>HZ){
kbd.repeat = 2;
kbd.count = 0;
return;
}
if(++kbd.count&1)
kbdputc(kbdq, kbd.c);
}
/*
* Called by a uart interrupt for console input.
*
* turn '\r' into '\n' before putting it into the queue.
*/
int
kbdcr2nl(Queue *q, int ch)
{
if(ch == '\r')
ch = '\n';
return kbdputc(q, ch);
}
/*
* called from the keyboard interrupt
*/
void
kbdprocesschar(int ch)
{
int s, c, i;
static int esc1, esc2;
static int alt, caps, ctl, num, shift;
static int collecting, nk;
static Rune kc[5];
int keyup;
c = ch;
/*
* e0's is the first of a 2 character sequence
*/
if(c == 0xe0){
esc1 = 1;
return;
} else if(c == 0xe1){
esc2 = 2;
return;
}
keyup = c&0x80;
c &= 0x7f;
if(c > sizeof kbtab){
c |= keyup;
if(c != 0xFF) /* these come fairly often: CAPSLOCK U Y */
print("unknown key %ux\n", c);
return;
}
if(esc1){
c = kbtabesc1[c];
esc1 = 0;
} else if(esc2){
esc2--;
return;
} else if(shift)
c = kbtabshift[c];
else
c = kbtab[c];
if(caps && c<='z' && c>='a')
c += 'A' - 'a';
/*
* keyup only important for shifts
*/
if(keyup){
switch(c){
case Latin:
alt = 0;
break;
case Shift:
shift = 0;
mouseshifted = 0;
break;
case RCtrl:
case LCtrl:
ctl = 0;
break;
}
return;
}
/*
* normal character
*/
if(!(c & (Spec|KF))){
if(ctl){
if(alt && c == Del)
exit(0);
c &= 0x1f;
}
if(!collecting){
kbdputc(kbdq, c);
return;
}
kc[nk++] = c;
c = latin1(kc, nk);
if(c < -1) /* need more keystrokes */
return;
if(c != -1) /* valid sequence */
kbdputc(kbdq, c);
else /* dump characters */
for(i=0; i<nk; i++)
kbdputc(kbdq, kc[i]);
nk = 0;
collecting = 0;
return;
} else {
switch(c){
case Caps:
caps ^= 1;
return;
case Num:
num ^= 1;
return;
case Shift:
shift = 1;
mouseshifted = 1;
return;
case Latin:
alt = 1;
/*
* VMware uses Ctl-Alt as the key combination
* to make the VM give up keyboard and mouse focus.
* This has the unfortunate side effect that when you
* come back into focus, Plan 9 thinks you want to type
* a compose sequence (you just typed alt).
*
* As a clumsy hack around this, we look for ctl-alt
* and don't treat it as the start of a compose sequence.
*/
if(!ctl){
collecting = 1;
nk = 0;
}
return;
case LCtrl:
case RCtrl:
collecting = 0;
nk = 0;
ctl = 1;
return;
}
}
kbdputc(kbdq, c);
}