pwclass          2713 src/gauche.h       ScmObj pwclass;
pwclass          1083 src/system.c       sp->pwclass = SCM_MAKE_STR_COPYING(pw->pw_class);
pwclass          1085 src/system.c       sp->pwclass = SCM_FALSE;
pwclass          1127 src/system.c   PWD_GETTER(pwclass)