69     Shell_t *shp = context->shp;  in b_cd()  local
75     int dirfd = shp->pwdfd;  in b_cd()
79     if (sh_isoption(shp, SH_RESTRICTED)) {  in b_cd()
88                 builtin_print_help(shp, cmd);  in b_cd()
111                 builtin_missing_argument(shp, cmd, argv[optget_ind - 1]);  in b_cd()
115                 builtin_unknown_option(shp, cmd, argv[optget_ind - 1]);  in b_cd()
126         builtin_usage_error(shp, cmd, "Too many arguments (expected at most two args)");  in b_cd()
129     shp->pwd = path_pwd(shp);  in b_cd()
130     oldpwd = (char *)shp->pwd;  in b_cd()
131     opwdnod = (shp->subshell ? sh_assignok(VAR_OLDPWD, 1) : VAR_OLDPWD);  in b_cd()
132     pwdnod = (shp->subshell ? sh_assignok(VAR_PWD, 1) : VAR_PWD);  in b_cd()
133     if (dirfd != shp->pwdfd && dir == 0) dir = (char *)e_dot;  in b_cd()
135         dir = sh_substitute(shp, oldpwd, dir, argv[1]);  in b_cd()
141         dir = FETCH_VT(sh_scoped(shp, opwdnod)->nvalue, cp);  in b_cd()
151     if (dirfd == shp->pwdfd && *dir != '/')  in b_cd()
154         cdpath = shp->cdpathlist;  in b_cd()
156             dp = FETCH_VT(sh_scoped(shp, VAR_CDPATH)->nvalue, const_cp);  in b_cd()
158                 cdpath = path_addpath(shp, NULL, dp, PATH_CDPATH);  in b_cd()
160                     shp->cdpathlist = cdpath;  in b_cd()
161                     cdpath->shp = shp;  in b_cd()
165         if (!oldpwd) oldpwd = path_pwd(shp);  in b_cd()
167     if (dirfd == shp->pwdfd && *dir != '/') {  in b_cd()
171         j = sfprintf(shp->strbuf, "%s", dir);  in b_cd()
172         cp = sfstruse(shp->strbuf);  in b_cd()
175             if (!shp->strbuf2) shp->strbuf2 = sfstropen();  in b_cd()
176             j = sfprintf(shp->strbuf2, "%s/%s", oldpwd, cp);  in b_cd()
177             dir = sfstruse(shp->strbuf2);  in b_cd()
184         cdpath = path_nextcomp(shp, cdpath, dir, 0);  in b_cd()
191         if (*stkptr(stkstd, PATH_OFFSET) != '/' && dirfd == shp->pwdfd) {  in b_cd()
209         newdirfd = sh_diropenat(shp, dirfd, path_relative(shp, stkptr(stkstd, PATH_OFFSET)));  in b_cd()
214                 if (shp->pwdfd >= 0) sh_close(shp->pwdfd);  in b_cd()
215                 shp->pwdfd = newdirfd;  in b_cd()
223             rval = sh_chdir(path_relative(shp, stkptr(stkstd, PATH_OFFSET)));  in b_cd()
224             if (rval >= 0 && shp->pwdfd >= 0) {  in b_cd()
225                 sh_close(shp->pwdfd);  in b_cd()
226                 shp->pwdfd = AT_FDCWD;  in b_cd()
233     if (rval < 0 && *dir == '/' && *(path_relative(shp, stkptr(stkstd, PATH_OFFSET))) != '/') {  in b_cd()
234         rval = newdirfd = sh_diropenat(shp, shp->pwdfd, dir);  in b_cd()
239                 if (shp->pwdfd >= 0) sh_close(shp->pwdfd);  in b_cd()
240                 shp->pwdfd = newdirfd;  in b_cd()
246         else if (sh_chdir(dir) >= 0 && shp->pwdfd >= 0) {  in b_cd()
247             sh_close(shp->pwdfd);  in b_cd()
248             shp->pwdfd = AT_FDCWD;  in b_cd()
260     scoped_dir = FETCH_VT(sh_scoped(shp, opwdnod)->nvalue, cp);  in b_cd()
288     shp->pwd = FETCH_VT(pwdnod->nvalue, const_cp);  in b_cd()
289     nv_scan(shp->track_tree, invalidate, NULL, NV_TAGGED, NV_TAGGED);  in b_cd()
290     path_newdir(shp, shp->pathlist);  in b_cd()
291     path_newdir(shp, shp->cdpathlist);  in b_cd()