157 lines
3.1 KiB
C
157 lines
3.1 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <9P2000.h>
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#include <thread.h>
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#include <9p.h>
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#include "dat.h"
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Channel *fschan;
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Channel *writechan;
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static File *devcons, *devnew;
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static void
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fsread(Req *r)
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{
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Fsevent e;
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if(r->fid->file == devnew){
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if(r->fid->aux==nil){
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respond(r, "phase error");
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return;
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}
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readstr(r, r->fid->aux);
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respond(r, nil);
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return;
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}
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assert(r->fid->file == devcons);
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e.type = 'r';
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e.r = r;
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send(fschan, &e);
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}
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static void
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fsflush(Req *r)
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{
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Fsevent e;
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e.type = 'f';
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e.r = r;
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send(fschan, &e);
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}
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static void
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fswrite(Req *r)
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{
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static Event *e[4];
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Event *ep;
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int i, j, ei, nb, wid, pid;
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Rune rune;
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char *s;
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char tmp[UTFmax], *t;
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static int n, partial;
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if(r->fid->file == devnew){
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if(r->fid->aux){
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respond(r, "already created a window");
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return;
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}
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s = emalloc(r->ifcall.count+1);
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memmove(s, r->ifcall.data, r->ifcall.count);
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s[r->ifcall.count] = 0;
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pid = strtol(s, &t, 0);
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if(*t==' ')
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t++;
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i = newpipewin(pid, t);
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free(s);
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s = emalloc(32);
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sprint(s, "%lud", (uint32_t)i);
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r->fid->aux = s;
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r->ofcall.count = r->ifcall.count;
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respond(r, nil);
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return;
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}
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assert(r->fid->file == devcons);
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if(e[0] == nil){
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for(i=0; i<nelem(e); i++){
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e[i] = emalloc(sizeof(Event));
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e[i]->c1 = 'S';
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}
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}
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ep = e[n];
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n = (n+1)%nelem(e);
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assert(r->ifcall.count <= 8192); /* is this guaranteed by lib9p? */
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nb = r->ifcall.count;
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memmove(ep->b+partial, r->ifcall.data, nb);
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nb += partial;
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ep->b[nb] = '\0';
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if(strlen(ep->b) < nb){ /* nulls in data */
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t = ep->b;
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for(i=j=0; i<nb; i++)
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if(ep->b[i] != '\0')
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t[j++] = ep->b[i];
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nb = j;
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t[j] = '\0';
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}
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ei = nb>8192? 8192 : nb;
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/* process bytes into runes, transferring terminal partial runes into next buffer */
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for(i=j=0; i<ei && fullrune(ep->b+i, ei-i); i+=wid,j++)
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wid = chartorune(&rune, ep->b+i);
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memmove(tmp, ep->b+i, nb-i);
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partial = nb-i;
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ep->nb = i;
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ep->nr = j;
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ep->b[i] = '\0';
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if(i != 0){
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sendp(win->cevent, ep);
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recvp(writechan);
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}
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partial = nb-i;
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memmove(e[n]->b, tmp, partial);
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r->ofcall.count = r->ifcall.count;
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respond(r, nil);
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}
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void
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fsdestroyfid(Fid *fid)
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{
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if(fid->aux)
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free(fid->aux);
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}
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Srv fs = {
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.read= fsread,
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.write= fswrite,
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.flush= fsflush,
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.destroyfid= fsdestroyfid,
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.leavefdsopen= 1,
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};
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void
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mountcons(void)
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{
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fschan = chancreate(sizeof(Fsevent), 0);
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writechan = chancreate(sizeof(void*), 0);
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fs.tree = alloctree("win", "win", DMDIR|0555, nil);
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devcons = createfile(fs.tree->root, "cons", "win", 0666, nil);
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if(devcons == nil)
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sysfatal("creating /dev/cons: %r");
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devnew = createfile(fs.tree->root, "wnew", "win", 0666, nil);
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if(devnew == nil)
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sysfatal("creating /dev/wnew: %r");
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threadpostmountsrv(&fs, nil, "/dev", MBEFORE);
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}
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