sys/kern/kern_prot.c

397 	register struct proc *targp;	/* target process */
411 		if ((targp = pfind(uap->pid)) == NULL) {
415 		if (!inferior(targp)) {
416 			PROC_UNLOCK(targp);
420 		if ((error = p_cansee(td, targp))) {
421 			PROC_UNLOCK(targp);
424 		if (targp->p_pgrp == NULL ||
425 		    targp->p_session != curp->p_session) {
426 			PROC_UNLOCK(targp);
430 		if (targp->p_flag & P_EXEC) {
431 			PROC_UNLOCK(targp);
435 		PROC_UNLOCK(targp);
437 		targp = curp;
438 	if (SESS_LEADER(targp)) {
443 		uap->pgid = targp->p_pid;
445 		if (uap->pgid == targp->p_pid) {
446 			error = enterpgrp(targp, uap->pgid, newpgrp,
453 		if (pgrp == targp->p_pgrp) {
457 		if (pgrp->pg_id != targp->p_pid &&
464 		error = enterthispgrp(targp, pgrp);