1998/0319/port/devdup.c (diff list | history)

port/devdup.c on 1990/0227
1990/0227		#include "u.h"
1992/0321		#include "../port/lib.h"
1990/0227		#include "mem.h" #include "dat.h" #include "fns.h"
1992/0111		#include "../port/error.h"
1990/0227
1997/0327		static int
1995/0804		dupgen(Chan *c, Dirtab*, int, int s, Dir *dp)
1990/0227		{ char buf[8];
1993/0501		Fgrp *fgrp = up->fgrp;
1990/0227		Chan *f; static int perm[] = { 0400, 0200, 0600, 0 };
1997/0606		if(s > fgrp->maxfd)
1990/0227		return -1;
1991/0705		if((f=fgrp->fd[s]) == 0)
1990/0227		return 0; sprint(buf, "%ld", s);
1991/1109		devdir(c, (Qid){s, 0}, buf, 0, eve, perm[f->mode&3], dp);
1990/0227		return 1; }
1997/0327		static Chan*
1990/0227		dupattach(char *spec) { return devattach('d', spec); }
1997/0327		static int
1990/0227		dupwalk(Chan *c, char *name) { return devwalk(c, name, (Dirtab *)0, 0, dupgen); }
1997/0327		static void
1990/0227		dupstat(Chan *c, char *db) {
1991/0426		devstat(c, db, (Dirtab *)0, 0L, dupgen);
1990/0227		}
1997/0327		static Chan*
1990/0227		dupopen(Chan *c, int omode) { Chan *f;
1990/11211		if(c->qid.path == CHDIR){
1990/0227		if(omode != 0)
1990/11211		error(Eisdir);
1990/0227		c->mode = 0; c->flag |= COPEN; c->offset = 0; return c; }
1992/0825		fdtochan(c->qid.path, openmode(omode), 0, 0); /* error check only */
1993/0501		f = up->fgrp->fd[c->qid.path];
1997/0327		cclose(c);
1990/0227		incref(f);
1991/0320		if(omode & OCEXEC) f->flag |= CCEXEC;
1990/0227		return f; }
1997/0327		static void
1995/0804		dupclose(Chan*)
1990/0227		{ }
1997/0327		static long
1998/0319		dupread(Chan *c, void *va, long n, vlong)
1990/0227		{ char *a = va;
1990/11211		if(c->qid.path != CHDIR)
1990/0227		panic("dupread"); return devdirread(c, a, n, (Dirtab *)0, 0L, dupgen); }
1997/0327		static long
1998/0319		dupwrite(Chan*, void*, long, vlong)
1990/0227		{ panic("dupwrite");
1992/0520		return 0; /* not reached */
1995/0108		}
1997/0327		Dev dupdevtab = {
1997/0408		'd', "dup",
1997/0327		devreset, devinit, dupattach, devclone, dupwalk, dupstat, dupopen, devcreate, dupclose, dupread, devbread, dupwrite, devbwrite, devremove, devwstat, };