ref: a18bf6d737025e05989a826895a5c332897cf492
dir: /sys/src/cmd/aux/kbdfs/kbdfs.c/
#include <u.h>
#include <libc.h>
#include <auth.h>
#include <fcall.h>
#include <thread.h>
#include <keyboard.h>
#include <9p.h>
enum {
Nscan= 128,
Qroot= 0,
Qkbd,
Qkbdin,
Qkbin,
Qkbmap,
Qcons,
Qconsctl,
Nqid,
Lnone = 0,
Lshift,
Lesc1,
Laltgr,
Lctl,
Lctrlesc1,
Lshiftesc1,
Lshiftaltgr,
Lmod4,
Laltgrmod4,
Nlayers,
Rawon= 0,
Rawoff,
STACK = 8*1024,
};
typedef struct Key Key;
typedef struct Scan Scan;
struct Key {
int down;
Rune b; /* button, unshifted key */
Rune r; /* rune, shifted key */
};
struct Scan {
int esc1;
int esc2;
int caps;
int num;
int shift;
int ctl;
int alt;
int altgr;
int mod4;
int leds;
};
struct Qtab {
char *name;
int mode;
int type;
} qtab[Nqid] = {
"/",
DMDIR|0500,
QTDIR,
"kbd",
0600,
0,
"kbdin",
0200,
0,
"kbin",
0200,
0,
"kbmap",
0600,
0,
"cons",
0600,
0,
"consctl",
0600,
0,
};
char Eshort[] = "read count too small";
char Ebadarg[] = "invalid argument";
char Eperm[] = "permission denied";
char Einuse[] = "file in use";
char Enonexist[] = "file does not exist";
char Ebadspec[] = "bad attach specifier";
char Ewalk[] = "walk in non directory";
char Ephase[] = "the front fell off";
char Eintr[] = "interrupted";
int kbdifd = -1;
int scanfd = -1;
int ledsfd = -1;
int consfd = -1;
int mctlfd = -1;
int msinfd = -1;
int notefd = -1;
int killfd = -1;
int kbdopen;
int consctlopen;
int quiet = 0;
char *sname = nil;
char *mntpt = "/dev";
char *user;
int debug;
Channel *keychan; /* chan(Key) */
Channel *mctlchan; /* chan(Key) */
Channel *kbdreqchan; /* chan(Req*) */
Channel *consreqchan; /* chan(Req*) */
Channel *ctlchan; /* chan(int) */
Channel *rawchan; /* chan(Rune) */
Channel *runechan; /* chan(Rune) */
Channel *conschan; /* chan(char*) */
Channel *kbdchan; /* chan(char*) */
Channel *intchan; /* chan(int) */
char *layertab[Nlayers] = {
[Lnone] "none",
[Lshift] "shift",
[Lesc1] "esc",
[Laltgr] "altgr",
[Lctl] "ctl",
[Lctrlesc1] "ctlesc",
[Lshiftesc1] "shiftesc",
[Lshiftaltgr] "shiftaltgr",
[Lmod4] "mod4",
[Laltgrmod4] "altgrmod4",
};
/* /sys/lib/kbmap/ascii defaults */
Rune ascii[Nlayers][Nscan] = {
/*
* The codes at 0x79 and 0x7b are for the (無)変換 "(Mu)henkan" keys
* used by OADG 109(A) keyboards. The PFU Happy Hacking keyboard
* has only one layout and will produce these for otherwise unmarked
* keys. The default mappings for the HHKB on other systems map
* these to Kdown and Kup. The jp kbmap will instead map these
* (along with 0x70) to control characters that ktrans understands.
*/
[Lnone]
{
[0x00] 0, Kesc, '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', Kctl, 'a', 's',
[0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
[0x28] '\'', '`', Kshift, '\\', 'z', 'x', 'c', 'v',
[0x30] 'b', 'n', 'm', ',', '.', '/', Kshift, '*',
[0x38] Kalt, ' ', Kctl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Knum, Kscroll,'7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', 0, 0, 0, KF|11,
[0x58] KF|12, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kdown, 0, Kup, 0, 0, 0, 0,
},
[Lshift]
{
[0x00] 0, Kesc, '!', '@', '#', '$', '%', '^',
[0x08] '&', '*', '(', ')', '_', '+', '\b', '\t',
[0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
[0x18] 'O', 'P', '{', '}', '\n', Kctl, 'A', 'S',
[0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
[0x28] '"', '~', Kshift, '|', 'Z', 'X', 'C', 'V',
[0x30] 'B', 'N', 'M', '<', '>', '?', Kshift, '*',
[0x38] Kalt, ' ', Kctl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Knum, Kscroll,'7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', 0, 0, 0, KF|11,
[0x58] KF|12, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kdown, 0, Kup, 0, 0, 0, 0,
},
[Lesc1]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] Ksbwd, Kbrtdn, 0, 0, 0, 0, 0, 0,
[0x18] 0, Ksfwd, Kbrtup, 0, '\n', Kctl, 0, 0,
[0x20] Kmute, 0, Kpause, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, Kvoldn, 0,
[0x30] Kvolup, 0, 0, 0, 0, '/', 0, Kprint,
[0x38] Kaltgr, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, Kbreak, Khome,
[0x48] Kup, Kpgup, 0, Kleft, 0, Kright, 0, Kend,
[0x50] Kdown, Kpgdown,Kins, Kdel, 0, 0, 0, 0,
[0x58] 0, 0, 0, Kmod4, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kup, 0, 0, 0, 0, 0, 0,
},
[Lshiftesc1]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, 0, 0, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, 0, 0, 0,
[0x38] 0, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, 0, 0,
[0x48] Kup, 0, 0, 0, 0, 0, 0, 0,
[0x50] 0, 0, 0, 0, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kup, 0, 0, 0, 0, 0, 0,
},
[Lctrlesc1]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, 0, 0, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, 0, 0, 0,
[0x38] 0, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, 0, 0,
[0x48] Kup, 0, 0, 0, 0, 0, 0, 0,
[0x50] 0, 0, 0, 0, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kup, 0, 0, 0, 0, 0, 0,
},
[Laltgr]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, '\n', Kctl, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, Kshift, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, '/', 0, Kprint,
[0x38] Kaltgr, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, Kbreak, Khome,
[0x48] Kup, Kpgup, 0, Kleft, 0, Kright, 0, Kend,
[0x50] Kdown, Kpgdown,Kins, Kdel, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, Kup, 0, 0, 0, 0, 0, 0,
},
[Lctl]
{
[0x00] 0, '', '', '', '', '', '', '',
[0x08] '', '', '', '', '
', ' ', '\b', '\t',
[0x10] '', '', '', '', '', '', '', '\t',
[0x18] '', '', '', ' ', '\n', Kctl, '', '',
[0x20] '', '', '', '\b', '\n', ' ', ' ', '',
[0x28] '', 0, Kshift, ' ', '', '', '', '',
[0x30] '', '', '
', ' ', '', '', Kshift, '\n',
[0x38] Kalt, 0, Kctl, '', '', '', '', '',
[0x40] '', '', ' ', '
', '', '', '', '',
[0x48] '', '', '
', '', '', '', ' ', '',
[0x50] '', '', '', '', 0, 0, 0, '',
[0x58] ' ', 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, '', 0, '\b', 0, 0, 0, 0,
},
[Lshiftaltgr]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, 0, 0, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, 0, 0, 0,
[0x38] 0, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, 0, 0,
[0x48] 0, 0, 0, 0, 0, 0, 0, 0,
[0x50] 0, 0, 0, 0, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, 0, 0, 0, 0, 0, 0, 0,
},
[Lmod4]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, 0, 0, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, 0, 0, 0,
[0x38] 0, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, 0, 0,
[0x48] 0, 0, 0, 0, 0, 0, 0, 0,
[0x50] 0, 0, 0, 0, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, 0, 0, 0, 0, 0, 0, 0,
},
[Laltgrmod4]
{
[0x00] 0, 0, 0, 0, 0, 0, 0, 0,
[0x08] 0, 0, 0, 0, 0, 0, 0, 0,
[0x10] 0, 0, 0, 0, 0, 0, 0, 0,
[0x18] 0, 0, 0, 0, 0, 0, 0, 0,
[0x20] 0, 0, 0, 0, 0, 0, 0, 0,
[0x28] 0, 0, 0, 0, 0, 0, 0, 0,
[0x30] 0, 0, 0, 0, 0, 0, 0, 0,
[0x38] 0, 0, 0, 0, 0, 0, 0, 0,
[0x40] 0, 0, 0, 0, 0, 0, 0, 0,
[0x48] 0, 0, 0, 0, 0, 0, 0, 0,
[0x50] 0, 0, 0, 0, 0, 0, 0, 0,
[0x58] 0, 0, 0, 0, 0, 0, 0, 0,
[0x60] 0, 0, 0, 0, 0, 0, 0, 0,
[0x68] 0, 0, 0, 0, 0, 0, 0, 0,
[0x70] 0, 0, 0, 0, 0, 0, 0, 0,
[0x78] 0, 0, 0, 0, 0, 0, 0, 0,
},
};
Rune kbtabs[Nlayers][Nscan];
char*
dev(char *file)
{
static char *buf = nil;
free(buf);
buf = smprint("%s/%s", mntpt, file);
return buf;
}
int
eopen(char *name, int mode)
{
int fd;
fd = open(name, mode);
if(fd < 0 && !quiet)
fprint(2, "%s: warning: can't open %s: %r\n", argv0, name);
return fd;
}
void
reboot(void)
{
int fd;
if(debug)
return;
if((fd = eopen(dev("reboot"), OWRITE)) < 0)
return;
fprint(fd, "reboot\n");
close(fd);
}
void
emergencywarp(void)
{
int fd;
if(debug)
return;
if(access("/srv/cwfs.cmd", AEXIST) == 0 && (fd = eopen("/srv/cwfs.cmd", OWRITE)) >= 0){
fprint(fd, "halt\n");
close(fd);
}
if(access("/srv/hjfs.cmd", AEXIST) == 0 && (fd = eopen("/srv/hjfs.cmd", OWRITE)) >= 0){
fprint(fd, "halt\n");
close(fd);
}
reboot();
}
void
shutdown(void)
{
if(notefd >= 0)
write(notefd, "hangup", 6);
if(killfd >= 0)
write(killfd, "hangup", 6);
threadexitsall(nil);
}
void
shiftup(void)
{
Key key = { .down = 0, .r = Kshift, .b = Kshift };
send(keychan, &key);
}
/*
* Scan code processing
*/
void
kbdputsc(Scan *scan, int c)
{
Key key;
/*
* e0's is the first of a 2 character sequence, e1 and e2 the first
* of a 3 character sequence (on the safari)
*/
if(scan->esc2){
scan->esc2--;
return;
} else if(c == 0xe1 || c == 0xe2){
scan->esc2 = 2;
return;
} else if(c == 0xe0){
scan->esc1 = 1;
return;
}
key.down = (c & 0x80) == 0;
c &= 0x7f;
if(c >= Nscan)
return;
/* qemu workarround: emulate e0 for numpad */
if(c != 0 && strchr("GHIKMOPQRS", c) != nil)
scan->esc1 |= !scan->num;
if(scan->esc1 && scan->ctl && kbtabs[Lctrlesc1][c] != 0)
key.r = kbtabs[Lctrlesc1][c];
else if(scan->esc1 && scan->shift && kbtabs[Lshiftesc1][c] != 0)
key.r = kbtabs[Lshiftesc1][c];
else if(scan->esc1)
key.r = kbtabs[Lesc1][c];
else if(scan->altgr && scan->mod4 && kbtabs[Laltgrmod4][c] != 0)
key.r = kbtabs[Laltgrmod4][c];
else if(scan->mod4 && kbtabs[Lmod4][c] != 0)
key.r = kbtabs[Lmod4][c];
else if(scan->shift && scan->altgr && kbtabs[Lshiftaltgr][c] != 0)
key.r = kbtabs[Lshiftaltgr][c];
else if(scan->shift)
key.r = kbtabs[Lshift][c];
else if(scan->altgr)
key.r = kbtabs[Laltgr][c];
else if(scan->ctl)
key.r = kbtabs[Lctl][c];
else
key.r = kbtabs[Lnone][c];
if(scan->esc1 || kbtabs[Lnone][c] == 0)
key.b = key.r;
else
key.b = kbtabs[Lnone][c];
if(scan->caps && key.r<='z' && key.r>='a')
key.r += 'A' - 'a';
if(scan->ctl && scan->altgr && key.r == Kdel)
emergencywarp();
if(scan->ctl && scan->alt && key.r == Kdel){
if(scan->shift)
shiftup();
else
reboot();
}
if(key.b)
send(keychan, &key);
switch(key.r){
case Kshift:
scan->shift = key.down;
break;
case Kctl:
scan->ctl = key.down;
break;
case Kaltgr:
scan->altgr = key.down;
break;
case Kmod4:
scan->mod4 = key.down;
break;
case Kalt:
scan->alt = key.down;
break;
case Knum:
scan->num ^= key.down;
break;
case Kcaps:
scan->caps ^= key.down;
break;
}
scan->esc1 = 0;
}
static void
kbdin(Scan *a, char *p, int n)
{
char *s;
Key k;
int i;
if(n > 0 && p[n-1] != 0){
/*
* old format as used by bitsy keyboard:
* just a string of characters, no keyup
* information.
*/
s = emalloc9p(n+1);
memmove(s, p, n);
s[n] = 0;
p = s;
while(*p){
p += chartorune(&k.r, p);
if(k.r)
send(rawchan, &k.r);
}
free(s);
return;
}
Nextmsg:
if(n < 2)
return;
switch(p[0]){
case 'R':
case 'r':
/* rune up/down */
chartorune(&k.r, p+1);
if(k.r == 0)
break;
k.b = 0;
k.down = (p[0] == 'r');
for(i=0; i<Nscan; i++){
if(kbtabs[Lnone][i] == k.r || kbtabs[Lshift][i] == k.r || (i >= 16 && kbtabs[Lctl][i] == k.r)){
/* assign button from kbtab */
k.b = kbtabs[Lnone][i];
/* handle ^X forms */
if(k.r == kbtabs[Lnone][i] && kbtabs[Lctl][i] && !a->shift && !a->altgr && a->ctl)
k.r = kbtabs[Lctl][i];
break;
}
}
/* button unknown to kbtab, use rune if no modifier keys are active */
if(k.b == 0 && !a->shift && !a->altgr && !a->ctl)
k.b = k.r;
if(k.r == Kshift)
a->shift = k.down;
else if(k.r == Kaltgr)
a->altgr = k.down;
else if(k.r == Kmod4)
a->mod4 = k.down;
else if(k.r == Kctl)
a->ctl = k.down;
send(keychan, &k);
break;
case 'c':
chartorune(&k.r, p+1);
nbsend(runechan, &k.r);
break;
default:
if(!kbdopen)
break;
i = strlen(p)+1;
s = emalloc9p(i);
memmove(s, p, i);
if(nbsendp(kbdchan, s) <= 0)
free(s);
}
i = strlen(p)+1;
n -= i, p += i;
goto Nextmsg;
}
void
setleds(Scan *scan, int leds)
{
char buf[8];
if(ledsfd < 0 || scan->leds == leds)
return;
leds &= 7;
snprint(buf, sizeof(buf), "%d", leds);
pwrite(ledsfd, buf, strlen(buf), 0);
scan->leds = leds;
}
/*
* Read scan codes from scanfd
*/
void
scanproc(void *)
{
uchar buf[64];
Scan scan;
int i, n;
threadsetname("scanproc");
memset(&scan, 0, sizeof scan);
while((n = read(scanfd, buf, sizeof buf)) > 0){
for(i=0; i<n; i++)
kbdputsc(&scan, buf[i]);
setleds(&scan, (scan.num<<1) | (scan.caps<<2));
}
shutdown();
}
void
kbdiproc(void *)
{
char buf[1024];
Scan a;
int n;
threadsetname("kbdiproc");
memset(&a, 0, sizeof(a));
while((n = read(kbdifd, buf, sizeof buf)) > 0)
kbdin(&a, buf, n);
shutdown();
}
char*
utfconv(Rune *r, int n)
{
char *s, *p;
int l;
l = runenlen(r, n) + 1;
s = emalloc9p(l);
for(p = s; n > 0; r++, n--)
p += runetochar(p, r);
*p = 0;
return s;
}
/*
* Read key events from keychan and produce characters to
* rawchan and keystate in kbdchan.
*/
void
keyproc(void *)
{
Rune rb[Nscan+1];
Key key;
int i, nb;
char *s;
threadsetname("keyproc");
nb = 0;
while(recv(keychan, &key) > 0){
if(key.r >= Kmouse+1 && key.r <= Kmouse+5){
if(msinfd >= 0)
send(mctlchan, &key);
continue;
}
rb[0] = 0;
if(key.b){
for(i=0; i<nb && rb[i+1] != key.b; i++)
;
if(!key.down){
while(i < nb && rb[i+1] == key.b){
memmove(rb+i+1, rb+i+2, (nb-i+1) * sizeof(rb[0]));
nb--;
rb[0] = 'K';
}
} else if(i == nb && nb < nelem(rb)-1 && key.b){
rb[++nb] = key.b;
rb[0] = 'k';
}
}
if(rb[0]){
if(kbdopen){
s = utfconv(rb, nb+1);
if(nbsendp(kbdchan, s) <= 0)
free(s);
}
if(mctlfd >= 0)
send(mctlchan, &key);
}
if(key.down && key.r)
send(rawchan, &key.r);
}
}
/*
* Read characters from consfd (serial console)
*/
void
consproc(void *)
{
char *p, *e, *x, buf[64];
int n, cr;
Rune r;
threadsetname("consproc");
cr = 0;
p = buf;
e = buf + sizeof(buf);
while((n = read(consfd, p, e - p)) > 0){
x = p + n;
p = buf;
while((n = x - p) > 0){
if(!fullrune(p, n)){
memmove(buf, p, n);
break;
}
p += chartorune(&r, p);
if(r == 021 || r == 023) /* XON/XOFF */
continue;
if(r == 0 || r == Runeerror){
cr = 0;
continue;
}
if(r == '\n' && cr){
cr = 0;
continue;
}
if(cr = (r == '\r'))
r = '\n';
send(runechan, &r);
}
if(n < 0) n = 0;
p = buf + n;
}
shutdown();
}
static int
nextrune(Channel *ch, Rune *r)
{
while(recv(ch, r) > 0){
switch(*r){
case 0:
case Kcaps:
case Knum:
case Kshift:
case Kaltgr:
case Kmod4:
/* ignore modifiers */
continue;
case Kctl:
case Kalt:
/* composing escapes */
return 1;
}
return 0;
}
return -1;
}
/*
* Read runes from rawchan, possibly compose special characters
* and output the new runes to runechan
*/
void
runeproc(void *)
{
static struct {
char *ld; /* must be seen before using this conversion */
char *si; /* options for last input characters */
Rune *so; /* the corresponding Rune for each si entry */
} tab[] = {
#include "latin1.h"
};
Rune r, rr;
int i, j;
int ctl;
threadsetname("runeproc");
ctl = 0;
while((i = nextrune(rawchan, &r)) >= 0){
if(i == 0){
ctl = 0;
Forward:
send(runechan, &r);
continue;
}
if(r == Kctl){
ctl = 1;
continue;
}
/*
* emulators like qemu and vmware use Ctrl+Alt to lock
* keyboard input so dont confuse them for a compose
* sequence.
*/
if(r != Kalt || ctl)
continue;
if(nextrune(rawchan, &r))
continue;
if(r == 'x' || r == 'X'){
i = (r == 'X') ? 4 : 6;
j = i;
r = 0;
do {
if(nextrune(rawchan, &rr))
break;
if(rr >= '0' && rr <= '9')
r = (r << 4) | (rr - '0');
else if(rr >= 'a' && rr <= 'f')
r = (r << 4) | (10 + (rr - 'a'));
else if(rr >= 'A' && rr <= 'F')
r = (r << 4) | (10 + (rr - 'A'));
else{
if(i == j && rr != ';'){
r = j == 6 ? 'x' : 'X';
goto Nothex;
}
break;
}
} while(--i > 0);
if((i == 0 || rr == ';') && r != 0 && r <= Runemax)
goto Forward;
} else {
if(nextrune(rawchan, &rr))
continue;
Nothex:
for(i = 0; i<nelem(tab); i++){
if(tab[i].ld[0] != r)
continue;
if(tab[i].ld[1] == 0)
break;
if(tab[i].ld[1] == rr){
nextrune(rawchan, &rr);
break;
}
}
if(i == nelem(tab) || rr == 0)
continue;
for(j = 0; tab[i].si[j]; j++){
if(tab[i].si[j] != rr)
continue;
r = tab[i].so[j];
goto Forward;
}
}
}
}
/*
* Need to do this in a separate proc because if process we're interrupting
* is dying and trying to print tombstone, kernel is blocked holding p->debug lock.
*/
void
intrproc(void *)
{
threadsetname("intrproc");
while(recv(intchan, nil) > 0)
write(notefd, "interrupt", 9);
}
/*
* Process Kmouse keys and mouse button swap on shift,
* unblank screen by twiching.
*/
void
mctlproc(void *)
{
Key key;
int i, mouseb = 0;
threadsetname("mctlproc");
for(;;){
if(nbrecv(mctlchan, &key) <= 0){
if(mctlfd >= 0)
fprint(mctlfd, "twitch");
if(recv(mctlchan, &key) <= 0)
break;
}
if(mctlfd >= 0 && key.r == Kshift){
if(key.down){
fprint(mctlfd, "buttonmap 132");
} else {
fprint(mctlfd, "swap");
fprint(mctlfd, "swap");
}
continue;
}
if(msinfd >= 0 && key.r >= Kmouse+1 && key.r <= Kmouse+5){
i = 1<<(key.r-(Kmouse+1));
if(key.down)
mouseb |= i;
else
mouseb &= ~i;
fprint(msinfd, "m%11d %11d %11d", 0, 0, mouseb);
continue;
}
}
}
/*
* Cook lines for cons
*/
void
lineproc(void *aux)
{
Rune rb[256], r;
Channel *cook;
int nr, done;
char *s;
cook = aux;
threadsetname("lineproc");
for(;;){
nr = 0;
done = 0;
do {
recv(cook, &r);
switch(r){
case Kdel:
if(nbsend(intchan, ¬efd) <= 0)
continue;
/* no break */
case '\0': /* flush */
nr = 0;
continue;
case Kbs: /* ^H: erase character */
case Knack: /* ^U: erase line */
case Ketb: /* ^W: erase word */
while(nr > 0){
nr--;
fprint(1, "\b");
if(r == Kbs)
break;
if(r == Ketb && utfrune(" \t", rb[nr]))
break;
}
continue;
case Keof: /* ^D: eof */
done = 1;
break;
case '\n':
done = 1;
/* no break */
default:
rb[nr++] = r;
fprint(1, "%C", r);
}
} while(!done && nr < nelem(rb));
s = utfconv(rb, nr);
if(nbsendp(conschan, s) <= 0)
free(s);
}
}
/*
* Reads Tread and Tflush requests from reqchan and responds
* to them with data received on the string channel.
*/
void
reqproc(void *aux)
{
enum { AREQ, ASTR, AEND };
Alt a[AEND+1];
Channel **ac;
Req *r, *q, **qq;
char *s, *p, *e;
int n, m;
threadsetname("reqproc");
e = nil;
s = nil;
p = nil;
q = nil;
qq = &q;
ac = aux;
a[AREQ].op = CHANRCV;
a[AREQ].c = ac[0]; /* chan(Req*) */
a[AREQ].v = &r;
a[ASTR].c = ac[1]; /* chan(char*) */
a[ASTR].v = &s;
a[AEND].op = CHANEND;
for(;;){
a[ASTR].op = s != nil ? CHANNOP : CHANRCV;
switch(alt(a)){
case AREQ:
if(r->ifcall.type == Tflush){
Req **rr, **xx;
for(rr = &q; *rr; rr=xx){
xx = &((*rr)->aux);
if(*rr == r->oldreq){
if((*rr = *xx) == nil)
qq = rr;
respond(r->oldreq, Eintr);
break;
}
}
respond(r, nil);
continue;
} else if(r->ifcall.type != Tread){
respond(r, Ephase);
continue;
}
r->aux = nil;
*qq = r;
qq = &r->aux;
if(0){
case ASTR:
p = s;
}
while(s != nil && q != nil){
r = q;
if((q = q->aux) == nil)
qq = &q;
r->ofcall.count = 0;
if(s == p){
More:
e = s + strlen(s);
if(r->fid->qid.path == Qkbd)
e++; /* send terminating \0 if its kbd file */
}
n = e - p;
m = r->ifcall.count - r->ofcall.count;
if(n > m){
if(r->ofcall.count > 0){
respond(r, nil);
continue;
}
n = m;
}
memmove((char*)r->ofcall.data + r->ofcall.count, p, n);
r->ofcall.count += n;
p += n;
if(p >= e){
free(s);
s = nbrecvp(a[ASTR].c);
if(s != nil){
p = s;
goto More;
}
}
respond(r, nil);
}
}
}
}
/*
* Keep track of rawing state and distribute the runes from
* runechan to the right channels depending on the state.
*/
void
ctlproc(void *)
{
Channel *cook, *aconsr[2], *akbdr[2];
enum { ACTL, ARUNE, AEND };
Alt a[AEND+1];
Rune r;
int c, raw;
char *s;
threadsetname("ctlproc");
if(kbdifd >= 0)
proccreate(kbdiproc, nil, STACK); /* kbdifd -> kbdin() */
if(mctlfd >= 0 || msinfd >= 0)
proccreate(mctlproc, nil, STACK); /* mctlchan -> mctlfd, msinfd */
if(scanfd >= 0)
proccreate(scanproc, nil, STACK); /* scanfd -> keychan */
if(consfd >= 0)
proccreate(consproc, nil, STACK); /* consfd -> runechan */
if(notefd >= 0)
proccreate(intrproc, nil, STACK); /* intchan -> notefd */
threadcreate(keyproc, nil, STACK); /* keychan -> mctlchan, rawchan, kbdchan */
threadcreate(runeproc, nil, STACK); /* rawchan -> runechan */
aconsr[0] = consreqchan;
aconsr[1] = conschan;
threadcreate(reqproc, aconsr, STACK); /* consreqchan,conschan -> respond */
akbdr[0] = kbdreqchan;
akbdr[1] = kbdchan;
threadcreate(reqproc, akbdr, STACK); /* kbdreqchan,kbdchan -> respond */
cook = chancreate(sizeof(Rune), 0);
threadcreate(lineproc, cook, STACK); /* cook -> conschan */
raw = 0;
a[ACTL].c = ctlchan;
a[ACTL].v = &c;
a[ACTL].op = CHANRCV;
a[ARUNE].c = runechan;
a[ARUNE].v = &r;
a[ARUNE].op = CHANRCV;
a[AEND].op = CHANEND;
for(;;){
switch(alt(a)){
case ACTL:
switch(c){
case Rawoff:
case Rawon:
if(raw = (c == Rawon)){
r = 0;
nbsend(cook, &r);
}
}
break;
case ARUNE:
if(kbdopen){
s = emalloc9p(UTFmax+2);
s[0] = 'c';
s[1+runetochar(s+1, &r)] = 0;
if(nbsendp(kbdchan, s) <= 0)
free(s);
break;
}
if(raw){
s = emalloc9p(UTFmax+1);
s[runetochar(s, &r)] = 0;
if(nbsendp(conschan, s) <= 0)
free(s);
break;
}
nbsend(cook, &r);
break;
}
}
}
/*
* Keyboard layout maps
*/
Rune*
kbmapent(int t, int sc)
{
if(t >= 0 && t < nelem(kbtabs) && sc >= 0 && sc < Nscan)
return &kbtabs[t][sc];
return nil;
}
void
kbmapread(Req *req)
{
char tmp[3*12+1];
int t, sc, soff, off, n;
Rune *rp;
off = req->ifcall.offset/(sizeof(tmp)-1);
soff = req->ifcall.offset%(sizeof(tmp)-1);
t = off/Nscan;
sc = off%Nscan;
if(rp = kbmapent(t, sc)){
sprint(tmp, "%11s %11d %11d\n", layertab[t], sc, *rp);
n = strlen(&tmp[soff]);
if(req->ifcall.count < n)
n = req->ifcall.count;
req->ofcall.count = n;
memmove(req->ofcall.data, &tmp[soff], n);
}else
req->ofcall.count = 0;
respond(req, nil);
}
Rune
kbcompat(Rune r)
{
static Rune o = Spec|0x60, tab[] = {
Kshift, Kbreak, Kctl, Kalt,
Kcaps, Knum, Kmiddle, Kaltgr,
Kmod4,
};
if(r >= o && r < o+nelem(tab))
return tab[r - o];
return r;
}
void
kbmapwrite(Req *req)
{
char line[100], *lp, *b, *e;
Rune r, *rp;
int sc, t, l;
Fid *f;
f = req->fid;
b = req->ifcall.data;
l = req->ifcall.count;
lp = line;
if(f->aux){
strcpy(line, f->aux);
lp = line+strlen(line);
free(f->aux);
f->aux = nil;
}
while(--l >= 0) {
*lp++ = *b++;
if(lp[-1] == '\n' || lp == &line[sizeof(line)-1]) {
*lp = 0;
if(*line == 0){
Badarg:
respond(req, Ebadarg);
return;
}
lp = line;
if(*line == '\n' || *line == '#')
continue;
while(*lp == ' ' || *lp == '\t')
lp++;
for(e = lp; strchr("\t ", *e) == nil; e++)
;
if(e == lp || *e == '\0')
goto Badarg;
*e = '\0';
for(t = 0; t < nelem(layertab); t++){
if(strcmp(lp, layertab[t]) != 0)
continue;
break;
}
if(t == nelem(layertab)){
t = strtoul(lp, &e, 0);
if(e == lp)
goto Badarg;
}
e++;
sc = strtoul(e, &lp, 0);
if(e == lp)
goto Badarg;
while(*lp == ' ' || *lp == '\t')
lp++;
if((rp = kbmapent(t, sc)) == nil)
goto Badarg;
r = 0;
if(*lp == '\'' && lp[1])
chartorune(&r, lp+1);
else if(*lp == '^' && lp[1]){
chartorune(&r, lp+1);
if(0x40 <= r && r < 0x60)
r -= 0x40;
else
goto Badarg;
}else if(*lp == 'M' && ('1' <= lp[1] && lp[1] <= '5'))
r = Kmouse+lp[1]-'0';
else if(*lp>='0' && *lp<='9') /* includes 0x... */
r = strtoul(lp, &lp, 0);
else
goto Badarg;
*rp = kbcompat(r);
lp = line;
}
}
if(lp != line){
l = lp-line;
f->aux = lp = emalloc9p(l+1);
memmove(lp, line, l);
lp[l] = 0;
}
req->ofcall.count = req->ifcall.count;
respond(req, nil);
}
/*
* Filesystem
*/
static int
fillstat(ulong qid, Dir *d)
{
struct Qtab *t;
memset(d, 0, sizeof *d);
d->uid = d->gid = user;
d->muid = "";
d->qid = (Qid){qid, 0, 0};
d->atime = time(0);
t = qtab + qid;
d->name = t->name;
d->qid.type = t->type;
d->mode = t->mode;
return 1;
}
static void
fsattach(Req *r)
{
char *spec;
spec = r->ifcall.aname;
if(spec && spec[0]){
respond(r, Ebadspec);
return;
}
r->fid->qid = (Qid){Qroot, 0, QTDIR};
r->ofcall.qid = r->fid->qid;
respond(r, nil);
}
static void
fsstat(Req *r)
{
fillstat((ulong)r->fid->qid.path, &r->d);
r->d.name = estrdup9p(r->d.name);
r->d.uid = estrdup9p(r->d.uid);
r->d.gid = estrdup9p(r->d.gid);
r->d.muid = estrdup9p(r->d.muid);
respond(r, nil);
}
static char*
fswalk1(Fid *fid, char *name, Qid *qid)
{
int i;
ulong path;
path = fid->qid.path;
switch(path){
case Qroot:
if (strcmp(name, "..") == 0) {
*qid = (Qid){Qroot, 0, QTDIR};
fid->qid = *qid;
return nil;
}
for(i = fid->qid.path; i<Nqid; i++){
if(strcmp(name, qtab[i].name) != 0)
continue;
*qid = (Qid){i, 0, 0};
fid->qid = *qid;
return nil;
}
return Enonexist;
default:
return Ewalk;
}
}
static void
fsopen(Req *r)
{
Fid *f;
static int need[4] = { 4, 2, 6, 1 };
struct Qtab *t;
int n;
f = r->fid;
t = qtab + f->qid.path;
n = need[r->ifcall.mode & 3]<<6;
if((n & t->mode) != n)
respond(r, Eperm);
else{
f->aux = nil;
switch((ulong)f->qid.path){
case Qkbmap:
if(r->ifcall.mode & OTRUNC)
memcpy(kbtabs, ascii, sizeof kbtabs);
break;
case Qkbd:
if(kbdopen){
respond(r, Einuse);
return;
}
kbdopen++;
break;
case Qconsctl:
consctlopen++;
break;
}
respond(r, nil);
}
}
static int
readtopdir(Fid*, uchar *buf, long off, int cnt, int blen)
{
int i, m, n;
long pos;
Dir d;
n = 0;
pos = 0;
for (i = 1; i < Nqid; i++){
fillstat(i, &d);
m = convD2M(&d, &buf[n], blen-n);
if(off <= pos){
if(m <= BIT16SZ || m > cnt)
break;
n += m;
cnt -= m;
}
pos += m;
}
return n;
}
static void
fsread(Req *r)
{
Fid *f;
f = r->fid;
switch((ulong)f->qid.path){
default:
respond(r, Ephase);
return;
case Qroot:
r->ofcall.count = readtopdir(f, (void*)r->ofcall.data, r->ifcall.offset,
r->ifcall.count, r->ifcall.count);
break;
case Qkbd:
sendp(kbdreqchan, r);
return;
case Qcons:
sendp(consreqchan, r);
return;
case Qkbmap:
kbmapread(r);
return;
}
respond(r, nil);
}
static void
fswrite(Req *r)
{
Fid *f;
char *p;
int n, i;
f = r->fid;
p = r->ifcall.data;
n = r->ifcall.count;
switch((ulong)f->qid.path){
default:
respond(r, Ephase);
return;
case Qcons:
if(write(1, p, n) != n){
responderror(r);
return;
}
break;
case Qconsctl:
if(n >= 5 && memcmp(p, "rawon", 5) == 0)
sendul(ctlchan, Rawon);
else if(n >= 6 && memcmp(p, "rawoff", 6) == 0)
sendul(ctlchan, Rawoff);
else {
respond(r, Ebadarg);
return;
}
break;
case Qkbdin:
case Qkbin:
if(f->aux == nil){
f->aux = emalloc9p(sizeof(Scan));
memset(f->aux, 0, sizeof(Scan));
}
if(f->qid.path == Qkbin){
for(i=0; i<n; i++)
kbdputsc((Scan*)f->aux, (uchar)p[i]);
} else {
kbdin((Scan*)f->aux, p, n);
}
break;
case Qkbmap:
kbmapwrite(r);
return;
}
r->ofcall.count = n;
respond(r, nil);
}
static void
fsflush(Req *r)
{
switch((ulong)r->oldreq->fid->qid.path) {
case Qkbd:
sendp(kbdreqchan, r);
return;
case Qcons:
sendp(consreqchan, r);
return;
}
respond(r, nil);
}
static void
fsdestroyfid(Fid *f)
{
void *p;
if(f->omode != -1)
switch((ulong)f->qid.path){
case Qkbdin:
case Qkbin:
case Qkbmap:
if(p = f->aux){
f->aux = nil;
free(p);
}
break;
case Qkbd:
kbdopen--;
break;
case Qconsctl:
if(--consctlopen == 0)
sendul(ctlchan, Rawoff);
break;
}
}
static int
procopen(int pid, char *name, int mode)
{
char buf[128];
snprint(buf, sizeof(buf), "/proc/%d/%s", pid, name);
return eopen(buf, mode);
}
static void
elevate(void)
{
Dir *d, nd;
int fd;
if(debug)
return;
if((fd = procopen(getpid(), "ctl", OWRITE)) < 0)
return;
/* get higher than normal priority */
fprint(fd, "pri 16\n");
/* always present in physical memory */
fprint(fd, "noswap\n");
/* dont let anybody kill us */
if(d = dirfstat(fd)){
nulldir(&nd);
nd.mode = d->mode & ~0222;
dirfwstat(fd, &nd);
free(d);
}
close(fd);
}
static void
fsstart(Srv*)
{
killfd = procopen(getpid(), "notepg", OWRITE);
elevate();
memcpy(kbtabs, ascii, sizeof kbtabs);
proccreate(ctlproc, nil, STACK);
}
static void
fsend(Srv*)
{
shutdown();
}
Srv fs = {
.start= fsstart,
.attach= fsattach,
.walk1= fswalk1,
.open= fsopen,
.read= fsread,
.write= fswrite,
.stat= fsstat,
.flush= fsflush,
.destroyfid= fsdestroyfid,
.end= fsend,
};
void
usage(void)
{
fprint(2, "usage: %s [ -qdD ] [ -s sname ] [ -m mntpnt ] [ file ]\n", argv0);
exits("usage");
}
void
threadmain(int argc, char** argv)
{
ARGBEGIN{
case 'd':
debug++;
break;
case 'D':
chatty9p++;
break;
case 's':
sname = EARGF(usage());
break;
case 'm':
mntpt = EARGF(usage());
break;
case 'q':
quiet++;
break;
default:
usage();
}ARGEND
if(*argv)
consfd = eopen(*argv, OREAD);
kbdifd = open(dev("kbd"), OREAD);
if(kbdifd < 0){
scanfd = eopen(dev("scancode"), OREAD);
ledsfd = eopen(dev("leds"), OWRITE);
}
mctlfd = eopen(dev("mousectl"), OWRITE);
msinfd = eopen(dev("mousein"), OWRITE);
notefd = procopen(getpid(), "notepg", OWRITE);
consreqchan = chancreate(sizeof(Req*), 0);
kbdreqchan = chancreate(sizeof(Req*), 0);
keychan = chancreate(sizeof(Key), 64);
mctlchan = chancreate(sizeof(Key), 64);
ctlchan = chancreate(sizeof(int), 0);
rawchan = chancreate(sizeof(Rune), 0);
runechan = chancreate(sizeof(Rune), 256);
conschan = chancreate(sizeof(char*), 128);
kbdchan = chancreate(sizeof(char*), 128);
intchan = chancreate(sizeof(int), 0);
user = getuser();
threadpostmountsrv(&fs, sname, mntpt, MBEFORE);
threadexits(0);
}