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----- Original Message ----- From: "Blair Sutton" <> To: <cygwin> Sent: Friday, June 06, 2008 4:16 AM Subject: Re: Patch to allow Cron to use non-POSIX shells like Powershell.exe and CMD.exe | 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. Here is an even simpler solution: specify the shell you want in the crontab itself Like * * * * * cmd /c "some DOS stuff" * * * * * powershell -command "some powershell stuff" * * * * * bash -c "some bash stuff" No need to specify SHELL, no wrapper shell, mix and match interpreters, maximal flexibility. And the top shell (sh) is smart and will exec the subshell because it recognizes that's the only thing it has to do. To verify that, try strace sh -c "cmd /C sh -c \"/bin/echo hello\"" | grep -i 'spawn\|fork' Pierre -- 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/
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