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kernel: disable wstat for devpipe

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This commit is contained in:
Jacob Moody 2022-05-15 05:44:59 +00:00
parent 2c67fb9794
commit 9429dd64f7
1 changed files with 14 additions and 43 deletions
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57
sys/src/9/port/devpipe.c
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@ -14,7 +14,6 @@ struct Pipe
Pipe *next;
int ref;
ulong path;
long perm;
Queue *q[2];
int qref[2];
};
@ -35,10 +34,9 @@ enum
Dirtab pipedir[] =
{
".", {Qdir,0,QTDIR}, 0, DMDIR|0500,
"data", {Qdata0}, 0, 0600,
"data1", {Qdata1}, 0, 0600,
"data", {Qdata0}, 0, 0666,
"data1", {Qdata1}, 0, 0666,
};
#define NPIPEDIR 3
static void
pipeinit(void)
@ -86,7 +84,6 @@ pipeattach(char *spec)
lock(&pipealloc);
p->path = ++pipealloc.path;
unlock(&pipealloc);
p->perm = pipedir[Qdata0].perm;
mkqid(&c->qid, NETQID(2*p->path, Qdir), 0, QTDIR);
c->aux = p;
@ -123,7 +120,7 @@ pipegen(Chan *c, char*, Dirtab *tab, int ntab, int i, Dir *dp)
break;
}
mkqid(&q, NETQID(NETID(c->qid.path), tab->qid.path), 0, QTFILE);
devdir(c, q, tab->name, len, eve, p->perm, dp);
devdir(c, q, tab->name, len, eve, tab->perm, dp);
return 1;
}
@ -134,7 +131,7 @@ pipewalk(Chan *c, Chan *nc, char **name, int nname)
Walkqid *wq;
Pipe *p;
wq = devwalk(c, nc, name, nname, pipedir, NPIPEDIR, pipegen);
wq = devwalk(c, nc, name, nname, pipedir, nelem(pipedir), pipegen);
if(wq != nil && wq->clone != nil && wq->clone != c){
p = c->aux;
qlock(p);
@ -160,18 +157,22 @@ pipestat(Chan *c, uchar *db, int n)
{
Pipe *p;
Dir dir;
ulong path;
Dirtab *d;
p = c->aux;
path = NETTYPE(c->qid.path);
d = pipedir + path;
switch(NETTYPE(c->qid.path)){
switch(path){
case Qdir:
devdir(c, c->qid, ".", 0, eve, 0555, &dir);
devdir(c, c->qid, d->name, 0, eve, d->perm, &dir);
break;
case Qdata0:
devdir(c, c->qid, "data", qlen(p->q[0]), eve, p->perm, &dir);
devdir(c, c->qid, d->name, qlen(p->q[0]), eve, d->perm, &dir);
break;
case Qdata1:
devdir(c, c->qid, "data1", qlen(p->q[1]), eve, p->perm, &dir);
devdir(c, c->qid, d->name, qlen(p->q[1]), eve, d->perm, &dir);
break;
default:
panic("pipestat");
@ -182,36 +183,6 @@ pipestat(Chan *c, uchar *db, int n)
return n;
}
static int
pipewstat(Chan* c, uchar* db, int n)
{
int m;
Dir *dir;
Pipe *p;
p = c->aux;
if(strcmp(up->user, eve) != 0)
error(Eperm);
if(NETTYPE(c->qid.path) == Qdir)
error(Eisdir);
dir = smalloc(sizeof(Dir)+n);
if(waserror()){
free(dir);
nexterror();
}
m = convM2D(db, n, &dir[0], (char*)&dir[1]);
if(m == 0)
error(Eshortstat);
if(!emptystr(dir[0].uid))
error("can't change owner");
if(dir[0].mode != ~0UL)
p->perm = dir[0].mode;
poperror();
free(dir);
return m;
}
/*
* if the stream doesn't exist, create it
*/
@ -309,7 +280,7 @@ piperead(Chan *c, void *va, long n, vlong)
switch(NETTYPE(c->qid.path)){
case Qdir:
return devdirread(c, va, n, pipedir, NPIPEDIR, pipegen);
return devdirread(c, va, n, pipedir, nelem(pipedir), pipegen);
case Qdata0:
return qread(p->q[0], va, n);
case Qdata1:
@ -424,5 +395,5 @@ Dev pipedevtab = {
pipewrite,
pipebwrite,
devremove,
pipewstat,
devwstat,
};