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- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "../port/error.h"
- #include "pool.h"
- #include <authsrv.h>
- void (*consdebug)(void) = nil;
- void (*screenputs)(char*, int) = nil;
- Queue* kbdq; /* unprocessed console input */
- Queue* lineq; /* processed console input */
- 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;
- static struct
- {
- QLock;
- int raw; /* true if we shouldn't process input */
- Ref ctl; /* number of opens to the control file */
- int x; /* index into line */
- char line[1024]; /* current input line */
- int count;
- int ctlpoff;
- /* a place to save up characters at interrupt time before dumping them in the queue */
- Lock lockputc;
- char istage[1024];
- char *iw;
- char *ir;
- char *ie;
- } kbd = {
- .iw = kbd.istage,
- .ir = kbd.istage,
- .ie = kbd.istage + sizeof(kbd.istage),
- };
- char *sysname;
- vlong fasthz;
- static void seedrand(void);
- static int readtime(ulong, char*, int);
- static int readbintime(char*, int);
- static int writetime(char*, int);
- static int writebintime(char*, int);
- enum
- {
- CMhalt,
- CMreboot,
- CMpanic,
- };
- Cmdtab rebootmsg[] =
- {
- CMhalt, "halt", 1,
- CMreboot, "reboot", 0,
- CMpanic, "panic", 0,
- };
- void
- printinit(void)
- {
- lineq = qopen(2*1024, 0, nil, nil);
- if(lineq == nil)
- panic("printinit");
- qnoblock(lineq, 1);
- }
- int
- consactive(void)
- {
- if(serialoq)
- return qlen(serialoq) > 0;
- return 0;
- }
- void
- prflush(void)
- {
- ulong now;
- now = m->ticks;
- while(consactive())
- if(m->ticks - now >= HZ)
- break;
- }
- /*
- * Log console output so it can be retrieved via /dev/kmesg.
- * This is good for catching boot-time messages after the fact.
- */
- struct {
- Lock lk;
- char buf[16384];
- uint n;
- } kmesg;
- 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;
- if(!islo())
- usewrite = 0;
- /*
- * 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.
- */
- if(kprintoq != nil && !qisclosed(kprintoq)){
- if(usewrite)
- qwrite(kprintoq, str, n);
- else
- qiwrite(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 && !kbd.raw) {
- m = t-str;
- if(usewrite){
- qwrite(serialoq, str, m);
- qwrite(serialoq, "\r\n", 2);
- } else {
- qiwrite(serialoq, str, m);
- qiwrite(serialoq, "\r\n", 2);
- }
- n -= m+1;
- str = t+1;
- } else {
- if(usewrite)
- qwrite(serialoq, str, n);
- else
- qiwrite(serialoq, str, n);
- break;
- }
- }
- }
- void
- putstrn(char *str, int n)
- {
- putstrn0(str, n, 0);
- }
- int noprint;
- int
- print(char *fmt, ...)
- {
- int n;
- va_list arg;
- char buf[PRINTSIZE];
- if(noprint)
- return -1;
- 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 n, 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);
- n = vseprint(buf+strlen(buf), buf+sizeof(buf), fmt, arg) - buf;
- va_end(arg);
- iprint("%s\n", buf);
- if(consdebug)
- (*consdebug)();
- splx(s);
- prflush();
- buf[n] = '\n';
- putstrn(buf, n+1);
- dumpstack();
- exit(1);
- }
- void
- _assert(char *fmt)
- {
- panic("assert failed at 0x%lux: %s", getcallerpc(&fmt), fmt);
- }
- int
- pprint(char *fmt, ...)
- {
- int n;
- Chan *c;
- va_list arg;
- char buf[2*PRINTSIZE];
- if(up == nil || up->fgrp == nil)
- return 0;
- c = up->fgrp->fd[2];
- if(c==0 || (c->mode!=OWRITE && c->mode!=ORDWR))
- return 0;
- n = snprint(buf, sizeof buf, "%s %lud: ", 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;
- }
- static void
- echoscreen(char *buf, int n)
- {
- char *e, *p;
- char ebuf[128];
- int x;
- p = ebuf;
- e = ebuf + sizeof(ebuf) - 4;
- while(n-- > 0){
- if(p >= e){
- screenputs(ebuf, p - ebuf);
- p = ebuf;
- }
- x = *buf++;
- if(x == 0x15){
- *p++ = '^';
- *p++ = 'U';
- *p++ = '\n';
- } else
- *p++ = x;
- }
- if(p != ebuf)
- screenputs(ebuf, p - ebuf);
- }
- static void
- echoserialoq(char *buf, int n)
- {
- char *e, *p;
- char ebuf[128];
- int x;
- p = ebuf;
- e = ebuf + sizeof(ebuf) - 4;
- while(n-- > 0){
- if(p >= e){
- qiwrite(serialoq, ebuf, p - ebuf);
- p = ebuf;
- }
- x = *buf++;
- if(x == '\n'){
- *p++ = '\r';
- *p++ = '\n';
- } else if(x == 0x15){
- *p++ = '^';
- *p++ = 'U';
- *p++ = '\n';
- } else
- *p++ = x;
- }
- if(p != ebuf)
- qiwrite(serialoq, ebuf, p - ebuf);
- }
- static void
- echo(char *buf, int n)
- {
- static int ctrlt, pid;
- int x;
- char *e, *p;
- if(n == 0)
- return;
- e = buf+n;
- for(p = buf; p < e; p++){
- switch(*p){
- case 0x10: /* ^P */
- if(cpuserver && !kbd.ctlpoff){
- active.exiting = 1;
- return;
- }
- break;
- case 0x14: /* ^T */
- ctrlt++;
- if(ctrlt > 2)
- ctrlt = 2;
- continue;
- }
- if(ctrlt != 2)
- continue;
- /* ^T escapes */
- ctrlt = 0;
- switch(*p){
- case 'S':
- x = splhi();
- dumpstack();
- procdump();
- splx(x);
- return;
- case 's':
- dumpstack();
- return;
- case 'x':
- xsummary();
- ixsummary();
- mallocsummary();
- // memorysummary();
- pagersummary();
- return;
- case 'd':
- if(consdebug == nil)
- consdebug = rdb;
- else
- consdebug = nil;
- print("consdebug now 0x%p\n", consdebug);
- return;
- case 'D':
- if(consdebug == nil)
- consdebug = rdb;
- consdebug();
- return;
- case 'p':
- x = spllo();
- procdump();
- splx(x);
- return;
- case 'q':
- scheddump();
- return;
- case 'k':
- killbig("^t ^t k");
- return;
- case 'r':
- exit(0);
- return;
- }
- }
- qproduce(kbdq, buf, n);
- if(kbd.raw)
- return;
- kmesgputs(buf, n);
- if(screenputs != nil)
- echoscreen(buf, n);
- if(serialoq)
- echoserialoq(buf, n);
- }
- /*
- * Called by a uart interrupt for console input.
- *
- * turn '\r' into '\n' before putting it into the queue.
- */
- int
- kbdcr2nl(Queue*, int ch)
- {
- char *next;
- ilock(&kbd.lockputc); /* just a mutex */
- if(ch == '\r' && !kbd.raw)
- ch = '\n';
- next = kbd.iw+1;
- if(next >= kbd.ie)
- next = kbd.istage;
- if(next != kbd.ir){
- *kbd.iw = ch;
- kbd.iw = next;
- }
- iunlock(&kbd.lockputc);
- return 0;
- }
- /*
- * Put character, possibly a rune, into read queue at interrupt time.
- * Called at interrupt time to process a character.
- */
- int
- kbdputc(Queue*, int ch)
- {
- int i, n;
- char buf[3];
- Rune r;
- char *next;
- if(kbd.ir == nil)
- return 0; /* in case we're not inited yet */
-
- ilock(&kbd.lockputc); /* just a mutex */
- r = ch;
- n = runetochar(buf, &r);
- for(i = 0; i < n; i++){
- next = kbd.iw+1;
- if(next >= kbd.ie)
- next = kbd.istage;
- if(next == kbd.ir)
- break;
- *kbd.iw = buf[i];
- kbd.iw = next;
- }
- iunlock(&kbd.lockputc);
- return 0;
- }
- /*
- * we save up input characters till clock time to reduce
- * per character interrupt overhead.
- */
- static void
- kbdputcclock(void)
- {
- char *iw;
- /* this amortizes cost of qproduce */
- if(kbd.iw != kbd.ir){
- iw = kbd.iw;
- if(iw < kbd.ir){
- echo(kbd.ir, kbd.ie-kbd.ir);
- kbd.ir = kbd.istage;
- }
- if(kbd.ir != iw){
- echo(kbd.ir, iw-kbd.ir);
- kbd.ir = iw;
- }
- }
- }
- enum{
- Qdir,
- Qbintime,
- Qcons,
- Qconsctl,
- Qcputime,
- Qdrivers,
- Qkmesg,
- Qkprint,
- Qhostdomain,
- Qhostowner,
- Qnull,
- Qosversion,
- Qpgrpid,
- Qpid,
- Qppid,
- Qrandom,
- Qreboot,
- Qswap,
- Qsysname,
- Qsysstat,
- Qtime,
- Quser,
- Qzero,
- };
- enum
- {
- VLNUMSIZE= 22,
- };
- static Dirtab consdir[]={
- ".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
- "bintime", {Qbintime}, 24, 0664,
- "cons", {Qcons}, 0, 0660,
- "consctl", {Qconsctl}, 0, 0220,
- "cputime", {Qcputime}, 6*NUMSIZE, 0444,
- "drivers", {Qdrivers}, 0, 0444,
- "hostdomain", {Qhostdomain}, DOMLEN, 0664,
- "hostowner", {Qhostowner}, 0, 0664,
- "kmesg", {Qkmesg}, 0, 0440,
- "kprint", {Qkprint, 0, QTEXCL}, 0, DMEXCL|0440,
- "null", {Qnull}, 0, 0666,
- "osversion", {Qosversion}, 0, 0444,
- "pgrpid", {Qpgrpid}, NUMSIZE, 0444,
- "pid", {Qpid}, NUMSIZE, 0444,
- "ppid", {Qppid}, NUMSIZE, 0444,
- "random", {Qrandom}, 0, 0444,
- "reboot", {Qreboot}, 0, 0664,
- "swap", {Qswap}, 0, 0664,
- "sysname", {Qsysname}, 0, 0664,
- "sysstat", {Qsysstat}, 0, 0666,
- "time", {Qtime}, NUMSIZE+3*VLNUMSIZE, 0664,
- "user", {Quser}, 0, 0666,
- "zero", {Qzero}, 0, 0444,
- };
- int
- readnum(ulong off, char *buf, ulong n, ulong val, int size)
- {
- char tmp[64];
- snprint(tmp, sizeof(tmp), "%*.0lud", size-1, val);
- tmp[size-1] = ' ';
- 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;
- }
- static void
- consinit(void)
- {
- todinit();
- randominit();
- /*
- * at 115200 baud, the 1024 char buffer takes 56 ms to process,
- * processing it every 22 ms should be fine
- */
- addclock0link(kbdputcclock, 22);
- }
- static Chan*
- consattach(char *spec)
- {
- return devattach('c', spec);
- }
- static Walkqid*
- conswalk(Chan *c, Chan *nc, char **name, int nname)
- {
- return devwalk(c, nc, name,nname, consdir, nelem(consdir), devgen);
- }
- static int
- consstat(Chan *c, uchar *dp, int n)
- {
- return devstat(c, dp, n, consdir, nelem(consdir), devgen);
- }
- static Chan*
- consopen(Chan *c, int omode)
- {
- c->aux = nil;
- c = devopen(c, omode, consdir, nelem(consdir), devgen);
- switch((ulong)c->qid.path){
- case Qconsctl:
- incref(&kbd.ctl);
- break;
- 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((ulong)c->qid.path){
- /* last close of control file turns off raw */
- case Qconsctl:
- if(c->flag&COPEN){
- if(decref(&kbd.ctl) == 0)
- kbd.raw = 0;
- }
- break;
- /* close of kprint allows other opens */
- case Qkprint:
- if(c->flag & COPEN){
- kprintinuse = 0;
- qhangup(kprintoq, nil);
- }
- break;
- }
- }
- 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);
- if(waserror()) {
- qunlock(&kbd);
- 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);
- 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 = MACHP(0)->ticks - 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:
- snprint(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 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
- conswrite(Chan *c, void *va, long n, vlong off)
- {
- char buf[256], ch;
- long l, bp;
- char *a;
- Mach *mp;
- int id, fd;
- Chan *swc;
- ulong offset;
- Cmdbuf *cb;
- Cmdtab *ct;
- a = va;
- offset = off;
- switch((ulong)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(buf, bp, 1);
- a += bp;
- l -= bp;
- }
- break;
- case Qconsctl:
- if(n >= sizeof(buf))
- n = sizeof(buf)-1;
- strncpy(buf, a, n);
- buf[n] = 0;
- for(a = buf; a;){
- if(strncmp(a, "rawon", 5) == 0){
- kbd.raw = 1;
- /* clumsy hack - wake up reader */
- ch = 0;
- qwrite(kbdq, &ch, 1);
- } else if(strncmp(a, "rawoff", 6) == 0){
- kbd.raw = 0;
- } else if(strncmp(a, "ctlpon", 6) == 0){
- kbd.ctlpoff = 0;
- } else if(strncmp(a, "ctlpoff", 7) == 0){
- kbd.ctlpoff = 1;
- }
- if(a = strchr(a, ' '))
- a++;
- }
- break;
- case Qtime:
- if(!iseve())
- error(Eperm);
- return writetime(a, n);
- case Qbintime:
- if(!iseve())
- error(Eperm);
- return writebintime(a, n);
- case Qhostowner:
- return hostownerwrite(a, n);
- case Qhostdomain:
- return hostdomainwrite(a, n);
- case Quser:
- return userwrite(a, n);
- case Qnull:
- break;
- case Qreboot:
- if(!iseve())
- error(Eperm);
- cb = parsecmd(a, n);
- if(waserror()) {
- free(cb);
- nexterror();
- }
- ct = lookupcmd(cb, rebootmsg, nelem(rebootmsg));
- switch(ct->index) {
- case CMhalt:
- reboot(nil, 0, 0);
- break;
- case CMreboot:
- rebootcmd(cb->nf-1, cb->f+1);
- break;
- case CMpanic:
- *(ulong*)0=0;
- panic("/dev/reboot");
- }
- poperror();
- free(cb);
- break;
- case Qsysstat:
- for(id = 0; id < 32; id++) {
- if(active.machs & (1<<id)) {
- mp = MACHP(id);
- mp->cs = 0;
- mp->intr = 0;
- mp->syscall = 0;
- mp->pfault = 0;
- mp->tlbfault = 0;
- mp->tlbpurge = 0;
- }
- }
- break;
- case Qswap:
- if(n >= sizeof buf)
- error(Egreg);
- memmove(buf, va, n); /* so we can NUL-terminate */
- buf[n] = 0;
- /* start a pager if not already started */
- if(strncmp(buf, "start", 5) == 0){
- kickpager();
- break;
- }
- if(!iseve())
- error(Eperm);
- if(buf[0]<'0' || '9'<buf[0])
- error(Ebadarg);
- fd = strtoul(buf, 0, 0);
- swc = fdtochan(fd, -1, 1, 1);
- setswapchan(swc);
- 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;
- default:
- print("conswrite: 0x%llux\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)
- {
- if(!waserror()){
- randomread((void*)&randn, sizeof(randn));
- poperror();
- }
- }
- 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;
- }
- static uvlong uvorder = 0x0001020304050607ULL;
- static uchar*
- le2vlong(vlong *to, uchar *f)
- {
- uchar *t, *o;
- int i;
- t = (uchar*)to;
- o = (uchar*)&uvorder;
- for(i = 0; i < sizeof(vlong); i++)
- t[o[i]] = f[i];
- return f+sizeof(vlong);
- }
- static uchar*
- vlong2le(uchar *t, vlong from)
- {
- uchar *f, *o;
- int i;
- f = (uchar*)&from;
- o = (uchar*)&uvorder;
- for(i = 0; i < sizeof(vlong); i++)
- t[i] = f[o[i]];
- return t+sizeof(vlong);
- }
- static long order = 0x00010203;
- static uchar*
- le2long(long *to, uchar *f)
- {
- uchar *t, *o;
- int i;
- t = (uchar*)to;
- o = (uchar*)ℴ
- for(i = 0; i < sizeof(long); i++)
- t[o[i]] = f[i];
- return f+sizeof(long);
- }
- static uchar*
- long2le(uchar *t, long from)
- {
- uchar *f, *o;
- int i;
- f = (uchar*)&from;
- o = (uchar*)ℴ
- for(i = 0; i < sizeof(long); i++)
- t[i] = f[o[i]];
- return t+sizeof(long);
- }
- char *Ebadtimectl = "bad time control";
- /*
- * like the old #c/time but with added info. Return
- *
- * secs nanosecs fastticks fasthz
- */
- static int
- readtime(ulong off, char *buf, int n)
- {
- vlong nsec, ticks;
- long sec;
- char str[7*NUMSIZE];
- nsec = todget(&ticks);
- if(fasthz == 0LL)
- fastticks((uvlong*)&fasthz);
- sec = nsec/1000000000ULL;
- snprint(str, sizeof(str), "%*.0lud %*.0llud %*.0llud %*.0llud ",
- NUMSIZE-1, sec,
- VLNUMSIZE-1, nsec,
- VLNUMSIZE-1, ticks,
- VLNUMSIZE-1, fasthz);
- return readstr(off, buf, n, str);
- }
- /*
- * set the time in seconds
- */
- static int
- writetime(char *buf, int n)
- {
- char b[13];
- long i;
- vlong now;
- if(n >= sizeof(b))
- error(Ebadtimectl);
- strncpy(b, buf, n);
- b[n] = 0;
- i = strtol(b, 0, 0);
- if(i <= 0)
- error(Ebadtimectl);
- now = i*1000000000LL;
- todset(now, 0, 0);
- return n;
- }
- /*
- * read binary time info. all numbers are little endian.
- * ticks and nsec are syncronized.
- */
- static int
- readbintime(char *buf, int n)
- {
- int i;
- vlong nsec, ticks;
- uchar *b = (uchar*)buf;
- i = 0;
- if(fasthz == 0LL)
- fastticks((uvlong*)&fasthz);
- nsec = todget(&ticks);
- if(n >= 3*sizeof(uvlong)){
- vlong2le(b+2*sizeof(uvlong), fasthz);
- i += sizeof(uvlong);
- }
- if(n >= 2*sizeof(uvlong)){
- vlong2le(b+sizeof(uvlong), ticks);
- i += sizeof(uvlong);
- }
- if(n >= 8){
- vlong2le(b, nsec);
- i += sizeof(vlong);
- }
- return i;
- }
- /*
- * set any of the following
- * - time in nsec
- * - nsec trim applied over some seconds
- * - clock frequency
- */
- static int
- writebintime(char *buf, int n)
- {
- uchar *p;
- vlong delta;
- long period;
- n--;
- p = (uchar*)buf + 1;
- switch(*buf){
- case 'n':
- if(n < sizeof(vlong))
- error(Ebadtimectl);
- le2vlong(&delta, p);
- todset(delta, 0, 0);
- break;
- case 'd':
- if(n < sizeof(vlong)+sizeof(long))
- error(Ebadtimectl);
- p = le2vlong(&delta, p);
- le2long(&period, p);
- todset(-1, delta, period);
- break;
- case 'f':
- if(n < sizeof(uvlong))
- error(Ebadtimectl);
- le2vlong(&fasthz, p);
- todsetfreq(fasthz);
- break;
- }
- return n;
- }
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