From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 13 05:55:18 2007 Return-Path: X-Original-To: hackers@freebsd.org Delivered-To: freebsd-hackers@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C5D6716A400 for ; Wed, 13 Jun 2007 05:55:18 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout1.cac.washington.edu (mxout1.cac.washington.edu [140.142.32.134]) by mx1.freebsd.org (Postfix) with ESMTP id A3FA513C45A for ; Wed, 13 Jun 2007 05:55:18 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.32.141] (may be forged)) by mxout1.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.05) with ESMTP id l5D5tI0b001852 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 12 Jun 2007 22:55:18 -0700 X-Auth-Received: from [192.168.10.45] (c-24-10-12-194.hsd1.ca.comcast.net [24.10.12.194]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l5D5tHFT021388 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 12 Jun 2007 22:55:17 -0700 Message-ID: <466F86C6.7010006@u.washington.edu> Date: Tue, 12 Jun 2007 22:55:18 -0700 From: Garrett Cooper User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) MIME-Version: 1.0 To: hackers@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-Version: 5.3.1.294258, Antispam-Engine: 2.5.1.298604, Antispam-Data: 2007.6.12.223334 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0, __USER_AGENT 0' Cc: Subject: Using shell commands versus C equivalents X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jun 2007 05:55:19 -0000 Another simple question (I hope): Is there any reason why shell commands should be used in place of a C command (in this case chmod via vsystem instead of the chmod(2) function)? It seems like the fork / exec would be more expensive with the shell command, but any area where code could be optimized is more than welcome I would think. Thanks, -Garrett