Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Message-ID: <3E1A2EFB.4020006@hack.kampbjorn.com> Date: Tue, 07 Jan 2003 02:35:55 +0100 From: Hack Kampbjorn Reply-To: cygwin@cygwin.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en,da,es,ca MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: nohup broken in sh-utils-2.0.15-2 References: <3.0.5.32.20030106142926.00a87ae0@mscmail.gsfc.nasa.gov> In-Reply-To: <3.0.5.32.20030106142926.00a87ae0@mscmail.gsfc.nasa.gov> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Michael A Richmond wrote: > When I run nohup from sh-utils-2.0.15-2, I get the message > > exec: --: not found > > The version of nohup in sh-utils-2.0-3 does not produce this error. The problematic line in nohup is the last one: exec -- "$@" In sh-utils-2.0 this was: exec "$niceprog" -5 -- "$@" Given that exec is a shell builtin and nohup is run under /bin/sh which should be ash. Extract from the ash man page: exec [ command arg... ] Unless command is omitted, the shell process is replaced with the specified program (which must be a real program, not a shell builtin or function). Any redirections on the exec command are marked as permanent, so that they are not undone when the exec command finishes. If the command is not found, the exec command causes the shell to exit. So removing the -- command protection as ash's exec doesn't take any options fixes the problem (and keychain works again). But if bash has been copied to /bin/sh then there will be a problem for commands with a leading dash. Extract from the bash man page: exec [-cl] [-a name] [command [arguments]] ... But testing for this and setting a shellvariable according seems to fix it for both ash and bash. --- /usr/bin/nohup.orig 2003-01-05 04:15:00.000000000 +0100 +++ /usr/bin/nohup 2003-01-07 02:32:59.000000000 +0100 @@ -76,4 +76,6 @@ exec 2>&1 fi -exec -- "$@" +DD=`(exec -l echo "--" 2>/dev/null)` + +exec $DD "$@" -- Med venlig hilsen / Kind regards Hack Kampbjørn -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/