/* runs on new char in kbd queue */
void readline(uv_async_t* key_wake)
{
char ch;
if(qread(kbdq, &ch, 1) == 0) {
print("null char\n");
}
else {
lsend = 0;
if(ch == 0){
/* flush output on rawoff -> rawon */
if(kbd.x > 0)
lsend = !qcanread(kbdq);
}else if(kbd.raw){
kbd.line[kbd.x++] = ch;
lsend = !qcanread(kbdq);
}else{
switch(ch){
case '\b':
if(kbd.x)
kbd.x--;
break;
case 0x15:
kbd.x = 0;
break;
case 0x04:
lsend = 1;
break;
case '\n':
lsend = 1;
default:
kbd.line[kbd.x++] = ch;
break;
}
}
if(lsend || kbd.x == sizeof kbd.line){
uv_mutex_lock(&line_lock);
qwrite(lineq, kbd.line, kbd.x);
// signal the queue consumer
uv_cond_signal(&line_ready);
uv_mutex_unlock(&line_lock);
kbd.x = 0;
}
}
}
static long
consread(Chan *c, void *va, long n, vlong offset)
{
int send;
char buf[64], ch;
if(c->qid.type & QTDIR)
return devdirread(c, va, n, contab, nelem(contab), devgen);
switch((ulong)c->qid.path) {
default:
error(Egreg);
case Qsysctl:
return readstr(offset, va, n, VERSION);
case Qsysname:
if(ossysname == nil)
return 0;
return readstr(offset, va, n, ossysname);
case Qrandom:
return randomread(va, n);
case Qnotquiterandom:
genrandom(va, n);
return n;
case Qhostowner:
return readstr(offset, va, n, eve);
case Qhoststdin:
return read(0, va, n); /* should be pread */
case Quser:
return readstr(offset, va, n, up->env->user);
case Qjit:
snprint(buf, sizeof(buf), "%d", cflag);
return readstr(offset, va, n, buf);
case Qtime:
snprint(buf, sizeof(buf), "%.lld", timeoffset + osusectime());
return readstr(offset, va, n, buf);
case Qdrivers:
return devtabread(c, va, n, offset);
case Qmemory:
return poolread(va, n, offset);
case Qnull:
return 0;
case Qmsec:
return readnum(offset, va, n, osmillisec(), NUMSIZE);
case Qcons:
qlock(&kbd.q);
if(waserror()){
qunlock(&kbd.q);
nexterror();
}
if(dflag)
error(Enonexist);
while(!qcanread(lineq)) {
if(qread(kbdq, &ch, 1) == 0)
continue;
send = 0;
if(ch == 0){
/* flush output on rawoff -> rawon */
if(kbd.x > 0)
send = !qcanread(kbdq);
}else if(kbd.raw){
kbd.line[kbd.x++] = ch;
send = !qcanread(kbdq);
}else{
switch(ch){
case '\b':
if(kbd.x)
kbd.x--;
break;
case 0x15:
kbd.x = 0;
break;
case 0x04:
send = 1;
break;
case '\n':
send = 1;
default:
kbd.line[kbd.x++] = ch;
break;
}
}
if(send || kbd.x == sizeof kbd.line){
qwrite(lineq, kbd.line, kbd.x);
kbd.x = 0;
}
}
n = qread(lineq, va, n);
qunlock(&kbd.q);
poperror();
return n;
case Qscancode:
if(offset == 0)
return readstr(0, va, n, gkscanid);
return qread(gkscanq, va, n);
case Qkeyboard:
return qread(gkbdq, va, n);
case Qkprint:
rlock(&kprintq.l);
if(waserror()){
runlock(&kprintq.l);
nexterror();
}
n = qread(kprintq.q, va, n);
poperror();
runlock(&kprintq.l);
return n;
}
}
/*
* move blocks between queues if they are ready.
* schedule an interrupt for the next interesting time.
*
* must be called with the link ilocked.
*/
static void
pushlink(Link *link, vlong now)
{
Block *bp;
vlong tout, tin;
/*
* put another block in the link queue
*/
ilock(link);
if(link->iq == nil || link->oq == nil){
iunlock(link);
return;
}
timerdel(&link->ci);
/*
* put more blocks into the xmit queue
* use the time the last packet was supposed to go out
* as the start time for the next packet, rather than
* the current time. this more closely models a network
* device which can queue multiple output packets.
*/
tout = link->tout;
if(!tout)
tout = now;
while(tout <= now){
bp = qget(link->oq);
if(bp == nil){
tout = 0;
break;
}
/*
* can't send the packet before it gets queued
*/
tin = gtime(bp->rp);
if(tin > tout)
tout = tin;
tout = tout + (BLEN(bp) - Tmsize) * link->delayn;
/*
* drop packets
*/
if(link->droprate && nrand(link->droprate) == 0)
link->drops++;
else{
ptime(bp->rp, tout + link->delay0ns);
if(link->tq == nil)
link->tq = bp;
else
link->tqtail->next = bp;
link->tqtail = bp;
}
}
/*
* record the next time a packet can be sent,
* but don't schedule an interrupt if none is waiting
*/
link->tout = tout;
if(!qcanread(link->oq))
tout = 0;
/*
* put more blocks into the receive queue
*/
tin = 0;
while(bp = link->tq){
tin = gtime(bp->rp);
if(tin > now)
break;
bp->rp += Tmsize;
link->tq = bp->next;
bp->next = nil;
if(!link->indrop)
qpassnolim(link->iq, bp);
else if(qpass(link->iq, bp) < 0)
link->soverflows++;
tin = 0;
}
if(bp == nil && qisclosed(link->oq) && !qcanread(link->oq) && !qisclosed(link->iq))
qhangup(link->iq, nil);
link->tin = tin;
if(!tin || tin > tout && tout)
tin = tout;
link->ci.ns = tin - now;
if(tin){
if(tin < now)
panic("loopback unfinished business");
timeradd(&link->ci);
}
iunlock(link);
}
static long
consread(Chan *c, void *buf, long n, vlong offset)
{
int l;
Osenv *o;
int ch, eol, i;
char *p, tmp[128];
char *cbuf = buf;
if(n <= 0)
return n;
o = up->env;
switch((ulong)c->qid.path){
case Qdir:
return devdirread(c, buf, n, consdir, nelem(consdir), devgen);
case Qsysctl:
return readstr(offset, buf, n, VERSION);
case Qcons:
case Qkeyboard:
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 */
do {
i = qread(kbdq, cbuf, n);
cbuf += i;
n -= i;
} while(n>0 && qcanread(kbdq));
n = cbuf - (char*)buf;
}
} else {
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;
case Qscancode:
if(offset == 0)
return readstr(0, buf, n, kscanid);
else
return qread(kscanq, buf, n);
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:
return qread(klogq, buf, n);
case Qkprint:
rlock(&kprintq);
if(waserror()){
runlock(&kprintq);
nexterror();
}
n = qread(kprintq.q, buf, n);
poperror();
runlock(&kprintq);
return n;
default:
print("consread %llud\n", c->qid.path);
error(Egreg);
}
return -1; /* never reached */
}
static long consread(struct chan *c, void *buf, long n, int64_t off)
{
ERRSTACK(1);
uint32_t l;
#if 0
Mach *mp;
#endif
char *b, *bp, ch;
char tmp[256]; /* must be >= 18*NUMSIZE (Qswap) */
int i, k, id, send;
int64_t offset = off;
#if 0
extern char configfile[];
#endif
if (n <= 0)
return n;
switch ((uint32_t) c->qid.path) {
case Qdir:
return devdirread(c, buf, n, consdir, ARRAY_SIZE(consdir), devgen);
case Qcons:
qlock(&(&kbd)->qlock);
if (waserror()) {
qunlock(&(&kbd)->qlock);
nexterror();
}
while (!qcanread(lineq)) {
if (qread(kbdq, &ch, 1) == 0)
continue;
send = 0;
if (ch == 0) {
/* flush output on rawoff -> rawon */
if (kbd.x > 0)
send = !qcanread(kbdq);
} else if (kbd.raw) {
kbd.line[kbd.x++] = ch;
send = !qcanread(kbdq);
} else {
switch (ch) {
case '\b':
if (kbd.x > 0)
kbd.x--;
break;
case 0x15: /* ^U */
kbd.x = 0;
break;
case '\n':
case 0x04: /* ^D */
send = 1;
default:
if (ch != 0x04)
kbd.line[kbd.x++] = ch;
break;
}
}
if (send || kbd.x == sizeof kbd.line) {
qwrite(lineq, kbd.line, kbd.x);
kbd.x = 0;
}
}
n = qread(lineq, buf, n);
qunlock(&(&kbd)->qlock);
poperror();
return n;
#if 0
case Qcputime:
k = offset;
if (k >= 6 * NUMSIZE)
return 0;
if (k + n > 6 * NUMSIZE)
n = 6 * NUMSIZE - k;
/* easiest to format in a separate buffer and copy out */
for (i = 0; i < 6 && NUMSIZE * i < k + n; i++) {
l = current->time[i];
if (i == TReal)
l = MACHP(0)->ticks - l;
l = TK2MS(l);
consreadnum(0, tmp + NUMSIZE * i, NUMSIZE, l, NUMSIZE);
}
memmove(buf, tmp + k, n);
return n;
#endif
case Qkmesg:
/*
* 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 (off >= kmesg.n)
n = 0;
else {
if (off + n > kmesg.n)
n = kmesg.n - off;
memmove(buf, kmesg.buf + off, n);
}
return n;
case Qkprint:
return qread(kprintoq, buf, n);
case Qpgrpid:
return consreadnum((uint32_t) offset, buf, n, current->pgrp->pgrpid,
NUMSIZE);
case Qpid:
return consreadnum((uint32_t) offset, buf, n, current->pid,
NUMSIZE);
case Qppid:
return consreadnum((uint32_t) offset, buf, n, current->ppid,
NUMSIZE);
case Qtime:
return readtime((uint32_t) offset, buf, n);
case Qbintime:
return readbintime(buf, n);
case Qhostowner:
return consreadstr((uint32_t) offset, buf, n, eve);
case Qhostdomain:
return consreadstr((uint32_t) offset, buf, n, hostdomain);
case Quser:
return consreadstr((uint32_t) offset, buf, n, current->user);
case Qnull:
return 0;
#if 0
case Qconfig:
return consreadstr((uint32_t) offset, buf, n, configfile);
case Qsysstat:
b = kzmalloc(conf.nmach * (NUMSIZE * 11 + 1) + 1, 0); /* +1 for NUL */
bp = b;
for (id = 0; id < 32; id++) {
if (active.machs & (1 << id)) {
mp = MACHP(id);
consreadnum(0, bp, NUMSIZE, id, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->cs, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->intr, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->syscall, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->pfault, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->tlbfault, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->tlbpurge, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE, mp->load, NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE,
(mp->perf.avg_inidle * 100) / mp->perf.period,
NUMSIZE);
bp += NUMSIZE;
consreadnum(0, bp, NUMSIZE,
(mp->perf.avg_inintr * 100) / mp->perf.period,
NUMSIZE);
bp += NUMSIZE;
*bp++ = '\n';
}
}
if (waserror()) {
kfree(b);
nexterror();
}
n = consreadstr((uint32_t) offset, buf, n, b);
kfree(b);
poperror();
return n;
case Qswap:
snprintf(tmp, sizeof tmp,
"%lud memory\n"
"%d pagesize\n"
"%lud kernel\n"
"%lud/%lud user\n"
"%lud/%lud swap\n"
"%lud/%lud kernel malloc\n"
"%lud/%lud kernel draw\n",
conf.npage * BY2PG,
BY2PG,
conf.npage - conf.upages,
palloc.user - palloc.freecount, palloc.user,
conf.nswap - swapalloc.free, conf.nswap,
mainmem->cursize, mainmem->maxsize,
imagmem->cursize, imagmem->maxsize);
return consreadstr((uint32_t) offset, buf, n, tmp);
#endif
case Qsysname:
if (sysname == NULL)
return 0;
return consreadstr((uint32_t) offset, buf, n, sysname);
case Qdrivers:
b = kzmalloc(READSTR, 0);
if (b == NULL)
error(ENOMEM, "allocation for /dev/drivers read failed");
k = 0;
for (int i = 0; &devtab[i] < __devtabend; i++)
k += snprintf(b + k, READSTR - k, "#%s\n", devtab[i].name);
if (waserror()) {
kfree(b);
nexterror();
}
n = consreadstr((uint32_t) offset, buf, n, b);
kfree(b);
poperror();
return n;
case Qklog:
//return qread(klogq, buf, n);
/* the queue gives us some elasticity for log reading. */
if (!logqueue)
logqueue = qopen(1 << 20, 0, 0, 0);
if (logqueue) {
int ret;
/* atomic sets/gets are not that important in this case. */
reading_kmesg = 1;
qwrite(logqueue, logbuffer, index);
index = 0;
ret = qread(logqueue, buf, n);
reading_kmesg = 0;
return ret;
}
break;
case Qzero:
memset(buf, 0, n);
return n;
case Qosversion:
snprintf(tmp, sizeof tmp, "2000");
n = consreadstr((uint32_t) offset, buf, n, tmp);
return n;
default:
printd("consread %#llux\n", c->qid.path);
error(EINVAL, "bad QID in consread");
}
return -1; /* never reached */
}
long
consread(Chan *c, void *va, long count, vlong offset)
{
int i, n, ch, eol;
Pointer m;
char *p, buf[64];
if(c->qid.type & QTDIR)
return devdirread(c, va, count, contab, nelem(contab), devgen);
switch((ulong)c->qid.path) {
default:
error(Egreg);
case Qsysctl:
return readstr(offset, va, count, VERSION);
case Qsysname:
if(ossysname == nil)
return 0;
return readstr(offset, va, count, ossysname);
case Qrandom:
return randomread(va, count);
case Qnotquiterandom:
pseudoRandomBytes(va, count);
return count;
case Qpin:
p = "pin set";
if(up->env->pgrp->pin == Nopin)
p = "no pin";
return readstr(offset, va, count, p);
case Qhostowner:
return readstr(offset, va, count, eve);
case Qhoststdin:
return read(0, va, count); /* should be pread */
case Quser:
return readstr(offset, va, count, up->env->user);
case Qjit:
snprint(buf, sizeof(buf), "%d", cflag);
return readstr(offset, va, count, buf);
case Qtime:
snprint(buf, sizeof(buf), "%.lld", timeoffset + osusectime());
return readstr(offset, va, count, buf);
case Qdrivers:
p = malloc(READSTR);
if(p == nil)
error(Enomem);
n = 0;
for(i = 0; devtab[i] != nil; i++)
n += snprint(p+n, READSTR-n, "#%C %s\n", devtab[i]->dc, devtab[i]->name);
n = readstr(offset, va, count, p);
free(p);
return n;
case Qmemory:
return poolread(va, count, offset);
case Qnull:
return 0;
case Qmsec:
return readnum(offset, va, count, osmillisec(), NUMSIZE);
case Qcons:
qlock(&kbd.q);
if(waserror()){
qunlock(&kbd.q);
nexterror();
}
if(dflag)
error(Enonexist);
while(!qcanread(lineq)) {
qread(kbdq, &kbd.line[kbd.x], 1);
ch = kbd.line[kbd.x];
if(kbd.raw){
qiwrite(lineq, &kbd.line[kbd.x], 1);
continue;
}
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, va, count);
qunlock(&kbd.q);
poperror();
return n;
case Qscancode:
if(offset == 0)
return readstr(0, va, count, gkscanid);
else
return qread(gkscanq, va, count);
case Qkeyboard:
return qread(gkbdq, va, count);
case Qpointer:
m = mouseconsume();
n = sprint(buf, "m%11d %11d %11d %11lud ", m.x, m.y, m.b, m.msec);
if (count < n)
n = count;
memmove(va, buf, n);
return n;
case Qkprint:
rlock(&kprintq.l);
if(waserror()){
runlock(&kprintq.l);
nexterror();
}
n = qread(kprintq.q, va, count);
poperror();
runlock(&kprintq.l);
return n;
case Qsnarf:
if(offset == 0) {
free(c->aux);
c->aux = clipread();
}
if(c->aux == nil)
return 0;
return readstr(offset, va, count, c->aux);
}
}
static long
consread(Chan *c, void *buf, long n, vlong off)
{
ulong l;
Mach *mp;
char *b, *bp, ch;
char tmp[256]; /* must be >= 18*NUMSIZE (Qswap) */
int i, k, id, send;
vlong offset = off;
if(n <= 0)
return n;
switch((ulong)c->qid.path){
case Qdir:
return devdirread(c, buf, n, consdir, nelem(consdir), devgen);
case Qcons:
qlock(&kbd.lk);
if(waserror()) {
qunlock(&kbd.lk);
nexterror();
}
while(!qcanread(lineq)){
if(qread(kbdq, &ch, 1) == 0)
continue;
send = 0;
if(ch == 0){
/* flush output on rawoff -> rawon */
if(kbd.x > 0)
send = !qcanread(kbdq);
}else if(kbd.raw){
kbd.line[kbd.x++] = ch;
send = !qcanread(kbdq);
}else{
switch(ch){
case '\b':
if(kbd.x > 0)
kbd.x--;
break;
case 0x15: /* ^U */
kbd.x = 0;
break;
case '\n':
case 0x04: /* ^D */
send = 1;
default:
if(ch != 0x04)
kbd.line[kbd.x++] = ch;
break;
}
}
if(send || kbd.x == sizeof kbd.line){
qwrite(lineq, kbd.line, kbd.x);
kbd.x = 0;
}
}
n = qread(lineq, buf, n);
qunlock(&kbd.lk);
poperror();
return n;
case Qcputime:
k = offset;
if(k >= 6*NUMSIZE)
return 0;
if(k+n > 6*NUMSIZE)
n = 6*NUMSIZE - k;
/* easiest to format in a separate buffer and copy out */
for(i=0; i<6 && NUMSIZE*i<k+n; i++){
l = up->time[i];
if(i == TReal)
l = msec() - l;
l = TK2MS(l);
readnum(0, tmp+NUMSIZE*i, NUMSIZE, l, NUMSIZE);
}
memmove(buf, tmp+k, n);
return n;
case Qkmesg:
/*
* 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(off >= kmesg.n)
n = 0;
else{
if(off+n > kmesg.n)
n = kmesg.n - off;
memmove(buf, kmesg.buf+off, n);
}
return n;
case Qkprint:
return qread(kprintoq, buf, n);
case Qpgrpid:
return readnum((ulong)offset, buf, n, up->pgrp->pgrpid, NUMSIZE);
case Qpid:
return readnum((ulong)offset, buf, n, up->pid, NUMSIZE);
case Qppid:
return readnum((ulong)offset, buf, n, up->parentpid, NUMSIZE);
case Qtime:
return readtime((ulong)offset, buf, n);
case Qbintime:
return readbintime(buf, n);
case Qhostowner:
return readstr((ulong)offset, buf, n, eve);
case Qhostdomain:
return readstr((ulong)offset, buf, n, hostdomain);
case Quser:
return readstr((ulong)offset, buf, n, up->user);
case Qnull:
return 0;
case Qsysstat:
b = smalloc(conf.nmach*(NUMSIZE*11+1) + 1); /* +1 for NUL */
bp = b;
for(id = 0; id < 32; id++) {
if(active.machs & (1<<id)) {
mp = MACHP(id);
readnum(0, bp, NUMSIZE, id, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->cs, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->intr, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->syscall, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->pfault, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->tlbfault, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->tlbpurge, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE, mp->load, NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE,
(mp->perf.avg_inidle*100)/mp->perf.period,
NUMSIZE);
bp += NUMSIZE;
readnum(0, bp, NUMSIZE,
(mp->perf.avg_inintr*100)/mp->perf.period,
NUMSIZE);
bp += NUMSIZE;
*bp++ = '\n';
}
}
if(waserror()){
free(b);
nexterror();
}
n = readstr((ulong)offset, buf, n, b);
free(b);
poperror();
return n;
case Qswap:
tmp[0] = 0;
return readstr((ulong)offset, buf, n, tmp);
case Qsysname:
if(sysname == nil)
return 0;
return readstr((ulong)offset, buf, n, sysname);
case Qrandom:
return randomread(buf, n);
case Qdrivers:
b = malloc(READSTR);
if(b == nil)
error(Enomem);
n = 0;
for(i = 0; devtab[i] != nil; i++)
n += snprint(b+n, READSTR-n, "#%C %s\n", devtab[i]->dc, devtab[i]->name);
if(waserror()){
free(b);
nexterror();
}
n = readstr((ulong)offset, buf, n, b);
free(b);
poperror();
return n;
case Qzero:
memset(buf, 0, n);
return n;
case Qosversion:
snprint(tmp, sizeof tmp, "2000");
n = readstr((ulong)offset, buf, n, tmp);
return n;
default:
print("consread 0x%llux\n", c->qid.path);
error(Egreg);
}
return -1; /* never reached */
}
static long
consread(Chan *c, void *va, long n, vlong offset)
{
int send;
char *p, buf[64], ch;
FILE * battery;
FILE * brightness;
int size;
if(c->qid.type & QTDIR)
return devdirread(c, va, n, contab, nelem(contab), devgen);
switch((ulong)c->qid.path) {
default:
error(Egreg);
case Qsysctl:
return readstr(offset, va, n, VERSION);
case Qsysname:
if(ossysname == nil)
return 0;
return readstr(offset, va, n, ossysname);
case Qrandom:
return randomread(va, n);
case Qnotquiterandom:
genrandom(va, n);
return n;
case Qhostowner:
return readstr(offset, va, n, eve);
case Qhoststdin:
return read(0, va, n); /* should be pread */
case Quser:
return readstr(offset, va, n, up->env->user);
case Qjit:
snprint(buf, sizeof(buf), "%d", cflag);
return readstr(offset, va, n, buf);
case Qtime:
snprint(buf, sizeof(buf), "%.lld", timeoffset + osusectime());
return readstr(offset, va, n, buf);
case Qdrivers:
return devtabread(c, va, n, offset);
case Qmemory:
return poolread(va, n, offset);
case Qnull:
return 0;
case Qmsec:
return readnum(offset, va, n, osmillisec(), NUMSIZE);
case Qcons:
qlock(&kbd.q);
if(waserror()){
qunlock(&kbd.q);
nexterror();
}
if(dflag)
error(Enonexist);
while(!qcanread(lineq)) {
if(qread(kbdq, &ch, 1) == 0)
continue;
send = 0;
if(ch == 0){
/* flush output on rawoff -> rawon */
if(kbd.x > 0)
send = !qcanread(kbdq);
}else if(kbd.raw){
kbd.line[kbd.x++] = ch;
send = !qcanread(kbdq);
}else{
switch(ch){
case '\b':
if(kbd.x)
kbd.x--;
break;
case 0x15:
kbd.x = 0;
break;
case 0x04:
send = 1;
break;
case '\n':
send = 1;
default:
kbd.line[kbd.x++] = ch;
break;
}
}
if(send || kbd.x == sizeof kbd.line){
qwrite(lineq, kbd.line, kbd.x);
kbd.x = 0;
}
}
n = qread(lineq, va, n);
qunlock(&kbd.q);
poperror();
return n;
case Qscancode:
if(offset == 0)
return readstr(0, va, n, gkscanid);
return qread(gkscanq, va, n);
case Qkeyboard:
return qread(gkbdq, va, n);
case Qevents:
return qread(c->aux, va, n);
case Qkprint:
rlock(&kprintq.l);
if(waserror()){
runlock(&kprintq.l);
nexterror();
}
n = qread(kprintq.q, va, n);
poperror();
runlock(&kprintq.l);
return n;
case Qbattery:
if(type == 's')
battery = fopen("/sys/class/power_supply/battery/capacity", "r");
else if(type == 'c')
battery = fopen("/sys/class/power_supply/max17042-0/capacity", "r");
else
battery = fopen("/sys/class/power_supply/battery/capacity", "r");
size = fread(buf, 1, sizeof(buf), battery);
fclose(battery);
buf[size - 1] = '\0';
return readstr(offset, va, n, buf);
case Qtype:
if(type == 's')
strncpy(buf, "nexus s", sizeof(buf));
else if(type == 'c')
strncpy(buf, "nook color", sizeof(buf));
else if(type == 'e')
strncpy(buf, "emulator", sizeof(buf));
else
strncpy(buf, "nexus s", sizeof(buf));
return readstr(offset, va, n, buf);
case Qbrightness:
if(type == 'c')
brightness = fopen("/sys/devices/platform/omap_pwm_led/leds/lcd-backlight/brightness", "r");
else if(type == 'e')
return;
else
brightness = fopen("/sys/class/backlight/s5p_bl/brightness", "r");
size = fread(buf, 1, sizeof(buf), brightness);
fclose(brightness);
buf[size - 1] = '\0';
return readstr(offset, va, n, buf);
}
}