static
Xfid*
fsysclunk(Xfid *x, Fid *f)
{
fsysdelid(f->mntdir);
sendp(x->c, xfidclose);
return nil;
}
/*
* Called only in exec.c:/^run(), from a different FD group
*/
Mntdir*
fsysmount(Rune *dir, int ndir, Rune **incl, int nincl)
{
char buf[256];
Mntdir *m;
/* close server side so don't hang if acme is half-exited */
close(sfd);
m = fsysaddid(dir, ndir, incl, nincl);
sprint(buf, "%d", m->id);
if(mount(cfd, -1, "/mnt/acme", MREPL, buf) < 0) {
fsysdelid(m);
return nil;
}
close(cfd);
bind("/mnt/acme", "/mnt/wsys", MREPL);
if(bind("/mnt/acme", "/dev", MBEFORE) < 0) {
fsysdelid(m);
return nil;
}
return m;
}
/* called while row is locked */
void
flushwarnings(void)
{
Warning *warn, *next;
Window *w;
Text *t;
int owner, nr, q0, n;
Rune *r;
for(warn=warnings; warn; warn=next) {
w = errorwin(warn->md, 'E');
t = &w->body;
owner = w->owner;
if(owner == 0)
w->owner = 'E';
wincommit(w, t);
/*
* Most commands don't generate much output. For instance,
* Edit ,>cat goes through /dev/cons and is already in blocks
* because of the i/o system, but a few can. Edit ,p will
* put the entire result into a single hunk. So it's worth doing
* this in blocks (and putting the text in a buffer in the first
* place), to avoid a big memory footprint.
*/
r = fbufalloc();
q0 = t->file->nc;
for(n = 0; n < warn->buf.nc; n += nr){
nr = warn->buf.nc - n;
if(nr > RBUFSIZE)
nr = RBUFSIZE;
bufread(&warn->buf, n, r, nr);
textbsinsert(t, t->file->nc, r, nr, TRUE, &nr);
}
textshow(t, q0, t->file->nc, 1);
free(r);
winsettag(t->w);
textscrdraw(t);
w->owner = owner;
w->dirty = FALSE;
winunlock(w);
bufclose(&warn->buf);
next = warn->next;
if(warn->md)
fsysdelid(warn->md);
free(warn);
}
warnings = nil;
}
static
Xfid*
fsyswalk(Xfid *x, Fid *f)
{
Fcall t;
int c, i, j, id;
Qid q;
uint8_t type;
uint32_t path;
Fid *nf;
Dirtab *d, *dir;
Window *w;
char *err;
nf = nil;
w = nil;
if(f->open)
return respond(x, &t, "walk of open file");
if(x->fid != x->newfid) {
nf = newfid(x->newfid);
if(nf->busy)
return respond(x, &t, "newfid already in use");
nf->busy = TRUE;
nf->open = FALSE;
nf->mntdir = f->mntdir;
if(f->mntdir)
f->mntdir->ref++;
nf->dir = f->dir;
nf->qid = f->qid;
nf->w = f->w;
nf->nrpart = 0; /* not open, so must be zero */
if(nf->w)
incref(nf->w);
f = nf; /* walk f */
}
t.nwqid = 0;
err = nil;
dir = nil;
id = WIN(f->qid);
q = f->qid;
if(x->nwname > 0) {
for(i=0; i<x->nwname; i++) {
if((q.type & QTDIR) == 0) {
err = Enotdir;
break;
}
if(strcmp(x->wname[i], "..") == 0) {
type = QTDIR;
path = Qdir;
id = 0;
if(w) {
winclose(w);
w = nil;
}
Accept:
if(i == MAXWELEM) {
err = "name too long";
break;
}
q.type = type;
q.vers = 0;
q.path = QID(id, path);
t.wqid[t.nwqid++] = q;
continue;
}
/* is it a numeric name? */
for(j=0; (c=x->wname[i][j]); j++)
if(c<'0' || '9'<c)
goto Regular;
/* yes: it's a directory */
if(w) /* name has form 27/23; get out before losing w */
break;
id = atoi(x->wname[i]);
qlock(&row);
w = lookid(id, FALSE);
if(w == nil) {
qunlock(&row);
break;
}
incref(w); /* we'll drop reference at end if there's an error */
path = Qdir;
type = QTDIR;
qunlock(&row);
dir = dirtabw;
goto Accept;
Regular:
// if(FILE(f->qid) == Qacme) /* empty directory */
// break;
if(strcmp(x->wname[i], "new") == 0) {
if(w)
error("w set in walk to new");
sendp(cnewwindow, nil); /* signal newwindowthread */
w = recvp(cnewwindow); /* receive new window */
incref(w);
type = QTDIR;
path = QID(w->id, Qdir);
id = w->id;
dir = dirtabw;
goto Accept;
}
if(id == 0)
d = dirtab;
else
d = dirtabw;
d++; /* skip '.' */
for(; d->name; d++)
if(strcmp(x->wname[i], d->name) == 0) {
path = d->qid;
type = d->type;
dir = d;
goto Accept;
}
break; /* file not found */
}
if(i==0 && err == nil)
err = Eexist;
}
if(err!=nil || t.nwqid<x->nwname) {
if(nf) {
nf->busy = FALSE;
fsysdelid(nf->mntdir);
}
} else if(t.nwqid == x->nwname) {
if(w) {
f->w = w;
w = nil; /* don't drop the reference */
}
if(dir)
f->dir = dir;
f->qid = q;
}
if(w != nil)
winclose(w);
return respond(x, &t, err);
}
void
waitthread(void *v)
{
Waitmsg *w;
Command *c, *lc;
uint pid;
int found, ncmd;
Rune *cmd;
char *err;
Text *t;
Pid *pids, *p, *lastp;
enum { WErr, WKill, WWait, WCmd, NWALT };
Alt alts[NWALT+1];
USED(v);
threadsetname("waitthread");
pids = nil;
alts[WErr].c = cerr;
alts[WErr].v = &err;
alts[WErr].op = CHANRCV;
alts[WKill].c = ckill;
alts[WKill].v = &cmd;
alts[WKill].op = CHANRCV;
alts[WWait].c = cwait;
alts[WWait].v = &w;
alts[WWait].op = CHANRCV;
alts[WCmd].c = ccommand;
alts[WCmd].v = &c;
alts[WCmd].op = CHANRCV;
alts[NWALT].op = CHANEND;
command = nil;
for(;;){
switch(alt(alts)){
case WErr:
qlock(&row.lk);
warning(nil, "%s", err);
free(err);
flushimage(display, 1);
qunlock(&row.lk);
break;
case WKill:
found = FALSE;
ncmd = runestrlen(cmd);
for(c=command; c; c=c->next){
/* -1 for blank */
if(runeeq(c->name, c->nname-1, cmd, ncmd) == TRUE){
if(postnote(PNGROUP, c->pid, "kill") < 0)
warning(nil, "kill %S: %r\n", cmd);
found = TRUE;
}
}
if(!found)
warning(nil, "Kill: no process %S\n", cmd);
free(cmd);
break;
case WWait:
pid = w->pid;
lc = nil;
for(c=command; c; c=c->next){
if(c->pid == pid){
if(lc)
lc->next = c->next;
else
command = c->next;
break;
}
lc = c;
}
qlock(&row.lk);
t = &row.tag;
textcommit(t, TRUE);
if(c == nil){
/* helper processes use this exit status */
if(strncmp(w->msg, "libthread", 9) != 0){
p = emalloc(sizeof(Pid));
p->pid = pid;
strncpy(p->msg, w->msg, sizeof(p->msg));
p->next = pids;
pids = p;
}
}else{
if(search(t, c->name, c->nname)){
textdelete(t, t->q0, t->q1, TRUE);
textsetselect(t, 0, 0);
}
if(w->msg[0])
warning(c->md, "%.*S: exit %s\n", c->nname-1, c->name, w->msg);
flushimage(display, 1);
}
qunlock(&row.lk);
free(w);
Freecmd:
if(c){
if(c->iseditcmd)
sendul(cedit, 0);
free(c->text);
free(c->name);
fsysdelid(c->md);
free(c);
}
break;
case WCmd:
/* has this command already exited? */
lastp = nil;
for(p=pids; p!=nil; p=p->next){
if(p->pid == c->pid){
if(p->msg[0])
warning(c->md, "%s\n", p->msg);
if(lastp == nil)
pids = p->next;
else
lastp->next = p->next;
free(p);
goto Freecmd;
}
lastp = p;
}
c->next = command;
command = c;
qlock(&row.lk);
t = &row.tag;
textcommit(t, TRUE);
textinsert(t, 0, c->name, c->nname, TRUE);
textsetselect(t, 0, 0);
flushimage(display, 1);
qunlock(&row.lk);
break;
}
}
}