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#include "u.h"
#include <errno.h>
#include "lib.h"
#include "dat.h"
#include "fns.h"
#include "error.h"
#undef pread
#undef pwrite
Chan*
lfdchan(int fd)
{
Chan *c;
c = newchan();
c->type = devno('L', 0);
c->aux = (void*)(uintptr)fd;
c->name = newcname("fd");
c->mode = ORDWR;
c->qid.type = 0;
c->qid.path = 0;
c->qid.vers = 0;
c->dev = 0;
c->offset = 0;
return c;
}
int
lfdfd(int fd)
{
return newfd(lfdchan(fd));
}
static Chan*
lfdattach(char *x)
{
USED(x);
error(Egreg);
return nil;
}
static Walkqid*
lfdwalk(Chan *c, Chan *nc, char **name, int nname)
{
USED(c);
USED(nc);
USED(name);
USED(nname);
error(Egreg);
return nil;
}
static int
lfdstat(Chan *c, uchar *dp, int n)
{
USED(c);
USED(dp);
USED(n);
error(Egreg);
return -1;
}
static Chan*
lfdopen(Chan *c, int omode)
{
USED(c);
USED(omode);
error(Egreg);
return nil;
}
static void
lfdclose(Chan *c)
{
close((int)(uintptr)c->aux);
}
static long
lfdread(Chan *c, void *buf, long n, vlong off)
{
USED(off); /* can't pread on pipes */
n = read((int)(uintptr)c->aux, buf, n);
if(n < 0){
iprint("error %d\n", errno);
oserror();
}
return n;
}
static long
lfdwrite(Chan *c, void *buf, long n, vlong off)
{
USED(off); /* can't pread on pipes */
n = write((int)(uintptr)c->aux, buf, n);
if(n < 0){
iprint("error %d\n", errno);
oserror();
}
return n;
}
Dev lfddevtab = {
'L',
"lfd",
devreset,
devinit,
devshutdown,
lfdattach,
lfdwalk,
lfdstat,
lfdopen,
devcreate,
lfdclose,
lfdread,
devbread,
lfdwrite,
devbwrite,
devremove,
devwstat,
};
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