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