X-Recipient: archive-cygwin AT delorie DOT com X-Spam-Check-By: sourceware.org Date: Fri, 6 Jun 2008 10:46:43 -0400 From: Christopher Faylor To: cygwin AT cygwin DOT com Subject: Re: Patch to allow Cron to use non-POSIX shells like Powershell.exe and CMD.exe Message-ID: <20080606144643.GA31485@ednor.casa.cgf.cx> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <2abc9c2d0806040808s2178885ak5dcf7cd528ea685a AT mail DOT gmail DOT com> <2abc9c2d0806040948l2f6dc1cbjd99bbdaea65cf181 AT mail DOT gmail DOT com> <006701c8c756$1b923260$d50410ac AT wirelessworld DOT airvananet DOT com> <2abc9c2d0806051528w6aa5c8f5g6bf946291171d579 AT mail DOT gmail DOT com> <2abc9c2d0806060116t2da2970as52d545f7a38560b7 AT mail DOT gmail DOT com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2abc9c2d0806060116t2da2970as52d545f7a38560b7@mail.gmail.com> User-Agent: Mutt/1.5.16 (2007-06-09) Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On Fri, Jun 06, 2008 at 09:16:41AM +0100, Blair Sutton wrote: >On further investigation, it appears powershell does alias "-c" for >"-command" hence no changes would be required for cron to support it. >However, the change would still be useful for other shells or perhaps >interpreters like Perl. > >On Pierre's offered solution: I now do recall how exec works and it is >correct that it replaces the current process - although a there will >be some overhead. However, that begs the question why cron ever >supported the SHELL parameter in the first place; if Mr Vixie wanted >everyone to write a wrapper script using his preferred shell. Mr. Vixie rightly assumed that cron was running in a UNIX-like environment where shells take the "-c" option. Ditto the authors of "make", "vim", and other packages which use the SHELL environment variable. Can we please put this to rest now? cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/