static int32_t
wstat(Chan* c, uint8_t* p, usize n)
{
Proc *up = externup();
int32_t l;
usize namelen;
if(waserror()){
cclose(c);
nexterror();
}
/*
* Renaming mount points is disallowed to avoid surprises
* (which should be renamed? the mount point or the mounted Chan?).
*/
if(c->ismtpt){
dirname(p, &namelen);
if(namelen)
nameerror(chanpath(c), Eismtpt);
}
l = c->dev->wstat(c, p, n);
poperror();
cclose(c);
return l;
}
void
sysfd2path(Ar0* ar0, ...)
{
Chan *c;
char *buf;
int fd;
usize nbuf;
va_list list;
va_start(list, ar0);
/*
* int fd2path(int fd, char* buf, int nbuf);
* should be
* int fd2path(int fd, char* buf, usize nbuf);
*/
fd = va_arg(list, int);
buf = va_arg(list, char*);
nbuf = va_arg(list, usize);
va_end(list);
buf = validaddr(buf, nbuf, 1);
c = fdtochan(fd, -1, 0, 1);
snprint(buf, nbuf, "%s", chanpath(c));
cclose(c);
ar0->i = 0;
}
long
sysfd2path(ulong *arg)
{
Chan *c;
validaddr(arg[1], arg[2], 1);
c = fdtochan(arg[0], -1, 0, 1);
snprint((char*)arg[1], arg[2], "%s", chanpath(c));
cclose(c);
return 0;
}
static char*
looprtopctl(SDev *s, char *p, char *e)
{
Ctlr *c;
char *r;
c = s->ctlr;
r = "ro";
if(c->mode == ORDWR)
r = "rw";
return seprint(p, e, "%s loop %s %s\n", s->name, r, chanpath(c->c));
}
long
sysfd2path(uint32 *arg)
{
Chan *c;
char *buf;
buf = uvalidaddr(arg[1], arg[2], 1);
c = fdtochan(arg[0], -1, 0, 1);
snprint(buf, arg[2], "%s", chanpath(c));
cclose(c);
return 0;
}
static int
looprctl(SDunit *unit, char *p, int l)
{
Ctlr *ctlr;
char *e, *op;
ctlr = unit->dev->ctlr;
e = p+l;
op = p;
p = seprint(p, e, "loop %s %s\n", ctlr->mode == ORDWR ? "rw" : "ro", chanpath(ctlr->c));
p = seprint(p, e, "geometry %llud 512\n", unit->sectors*512);
return p - op;
}
static long
wstat(Chan *c, uchar *d, int nd)
{
long l;
int namelen;
if(waserror()){
cclose(c);
nexterror();
}
if(c->ismtpt){
/*
* Renaming mount points is disallowed to avoid surprises
* (which should be renamed? the mount point or the mounted Chan?).
*/
dirname(d, &namelen);
if(namelen)
nameerror(chanpath(c), Eismtpt);
}
l = devtab[c->type]->wstat(c, d, nd);
poperror();
cclose(c);
return l;
}