From owner-freebsd-questions Wed Sep 23 07:56:29 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id HAA09063 for freebsd-questions-outgoing; Wed, 23 Sep 1998 07:56:29 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id HAA09027 for ; Wed, 23 Sep 1998 07:56:08 -0700 (PDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.9.1/8.9.1) id JAA10952; Wed, 23 Sep 1998 09:54:28 -0500 (CDT) Date: Wed, 23 Sep 1998 09:54:28 -0500 From: Dan Nelson To: Andre Albsmeier , freebsd-questions@FreeBSD.ORG Subject: Re: How to get the PID before a program is run? (No joke :-) Message-ID: <19980923095428.B10645@emsphone.com> References: <199809230729.JAA12131@internal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.94.3i In-Reply-To: <199809230729.JAA12131@internal>; from "Andre Albsmeier" on Wed Sep 23 09:29:47 GMT 1998 X-OS: FreeBSD 2.2.7-STABLE Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In the last episode (Sep 23), Andre Albsmeier said: > I want to start a program but I need its PID before it is run. One > way would be to load the program and send a -STOP signal very > quickly. Then I have got the PID, can do some things and send a -CONT > signal when finished. uuh, you need to know the pid before you can send a -STOP to it :) Would a fork()/exec() pair do what you want? Just record the pid somewhere before you exec(). > I am sure there must be an esay way to do this on > FreeBSD but I didn't find any. My preferred way > of using it would be in a shell script but every > hint is welcome. How about: #! /bin/sh echo $$ > /var/run/program.pid exec /bin/program -Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message