X_OK             1675 dln.c          	    if (!S_ISDIR(st.st_mode) && eaccess(fbuf, X_OK) == 0)
X_OK              929 file.c         	if (!(mode & X_OK))
X_OK             1324 file.c             if (eaccess(StringValueCStr(fname), X_OK) < 0) return Qfalse;
X_OK             1341 file.c             if (access(StringValueCStr(fname), X_OK) < 0) return Qfalse;
X_OK              185 include/ruby/defines.h #ifndef X_OK