Symbol: XCCLOSE
bin/ksh/exec.c
180
exchild(t->left, flags|XPIPEO|XCCLOSE, pv[0]);
bin/ksh/exec.c
259
exchild(t->left, flags|XBGND|XFORK|XCOPROC|XCCLOSE,
bin/ksh/jobs.c
586
|| ((flags & XCCLOSE) && ischild)))