exrc_isok
switch (exrc_isok(sp, &hsb, &fd, _PATH_SYSEXRC, 1, 0)) {
switch (exrc_isok(sp, &hsb, &fd, path, 0, 1)) {
if (exrc_isok(sp, &hsb, &fd, path, 0, 1) == RCOK &&
switch (exrc_isok(sp, &lsb, &fd, _PATH_NEXRC, 0, 0)) {
if (exrc_isok(sp, &lsb, &fd, _PATH_EXRC, 0, 0)
static enum rc exrc_isok(SCR *, struct stat *, int *, char *, int, int);