Date: Sat, 9 Jan 1999 22:13:56 -0500 (EST) From: Alan Bawden <Alan@LCS.MIT.EDU> To: freebsd-questions@FreeBSD.ORG Subject: Re: messing with /etc/rc.conf Message-ID: <9Jan1999.220116.Alan@LCS.MIT.EDU> In-Reply-To: <19990108192746.B63511@scientia.demon.co.uk> (message from Ben Smithurst on Fri, 8 Jan 1999 19:27:46 %2B0000) References: <8Jan1999.042549.Alan@LCS.MIT.EDU> <19990108192746.B63511@scientia.demon.co.uk>
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Date: Fri, 8 Jan 1999 19:27:46 +0000 From: Ben Smithurst <ben@scientia.demon.co.uk> Alan Bawden wrote: > ... I recently learned > that if rc.conf contains the following: > > ntpdate_flags="-bs $(awk '$1 == "server" || $1 == "peer" {print $2}' /etc/ntp.conf)" > > something will occasionally re-write this to read: > > ntpdate_flags="-bs $(awk '$1 == " Well obviously, since the first non-escaped quote will terminate the quoted string. Forgive me, but it isn't obvious to me. That second doublequote is -inside- a $( ) pair, and so does -not- terminate the string if `sh' is doing the parsing. Escape the quotes by preceding them with a backslash within the quoted string and it might work: That, in fact, would make it illegal sh syntax. > 1. What is it that makes this change. And what exactly are the rules it > applies when parsing/rewriting the file? The file is parsed by sh(1), read it's man page for quoting rules. I did. The file is perfectly legal sh syntax. I was wondering what -other- program it is that parses /etc/rc.conf, and if there was some way I could write something that makes -both- sh, and that other mystery program happy at the same time. > 2. If I move the setting of ntpdate_flags into /etc/rc.conf.local, will > whatever this thing is leave it alone there? No, it's still parsed by sh(1). The line I wrote is perfectly legal sh syntax. So if /etc/rc.conf.local is -only- parsed by sh, then that will solve my problem. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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