Function pgfind

freebsd/kern/kern_proc.c:484–498

* Locate a process group by number. * The caller must hold proctree_lock. */

 * The caller must hold proctree_lock.
 */
struct pgrp *
pgfind(pid_t pgid)
{
	struct pgrp *pgrp;

	sx_assert(&proctree_lock, SX_LOCKED);

	LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
		if (pgrp->pg_id == pgid) {
			PGRP_LOCK(pgrp);
			return (pgrp);
		}
	}
	return (NULL);
}

/*
 * Locate process and do additional manipulations, depending on flags.