1991/0411/port/devdup.c (diff list | history)

port/devdup.c on 1990/0227
1990/0227		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "errno.h" #include "devtab.h" int dupgen(Chan *c, Dirtab *tab, int ntab, int s, Dir *dp) { char buf[8]; Chan *f; static int perm[] = { 0400, 0200, 0600, 0 }; if(s >= NFD) return -1; if((f=u->fd[s]) == 0) return 0; sprint(buf, "%ld", s);
1990/11211		devdir(c, (Qid){s, 0}, buf, 0, perm[f->mode&3], dp);
1990/0227		return 1; } void dupinit(void) { } void dupreset(void) { } Chan * dupattach(char *spec) { return devattach('d', spec); } Chan * dupclone(Chan *c, Chan *nc) { return devclone(c, nc); } int dupwalk(Chan *c, char *name) { return devwalk(c, name, (Dirtab *)0, 0, dupgen); } void dupstat(Chan *c, char *db) { devstat(c, db, (Dirtab *)0, 0L, dupgen); } Chan * 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; }
1990/11211		fdtochan(c->qid.path, openmode(omode)); /* error check only */ f = u->fd[c->qid.path];
1990/0227		close(c); incref(f);
1991/0320		if(omode & OCEXEC) f->flag |= CCEXEC;
1990/0227		return f; } void dupcreate(Chan *c, char *name, int omode, ulong perm) {
1990/11211		error(Eperm);
1990/0227		} void dupremove(Chan *c) {
1990/11211		error(Eperm);
1990/0227		} void dupwstat(Chan *c, char *dp) {
1990/11211		error(Egreg);
1990/0227		} void dupclose(Chan *c) { } long
1991/0411		dupread(Chan *c, void *va, long n, ulong offset)
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); } long
1991/0411		dupwrite(Chan *c, void *va, long n, ulong offset)
1990/0227		{ panic("dupwrite"); }