PATHSEP
if (!(p = strchr(sp, PATHSEP)))
&& (!isassign || p[1] != PATHSEP))
case PATHSEP: /* : */
if (!(p = strchr(sp, PATHSEP)))
if ((mval = strchr(mval, PATHSEP)) != NULL) {
for (pend = plist; *pend && *pend != PATHSEP; pend++)