1990/0227/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); devdir(c, s, buf, 0, perm[f->mode&3], dp); 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; if(c->qid == CHDIR){ if(omode != 0) error(0, Eisdir); c->mode = 0; c->flag |= COPEN; c->offset = 0; return c; } fdtochan(c->qid, openmode(omode)); /* error check only */ f = u->fd[c->qid]; close(c); incref(f); return f; } void dupcreate(Chan *c, char *name, int omode, ulong perm) { error(0, Eperm); } void dupremove(Chan *c) { error(0, Eperm); } void dupwstat(Chan *c, char *dp) { error(0, Egreg); } void dupclose(Chan *c) { } long dupread(Chan *c, void *va, long n) { char *a = va; if(c->qid != CHDIR) panic("dupread"); return devdirread(c, a, n, (Dirtab *)0, 0L, dupgen); } long dupwrite(Chan *c, void *va, long n) { panic("dupwrite"); } void duperrstr(Error *e, char *buf) { rooterrstr(e, buf); } void dupuserstr(Error *e, char *buf) { consuserstr(e, buf); }