Date: Sat, 21 Jun 2008 18:16:58 -0400 From: Chuck Robey <chuckr@telenix.org> To: Helge Rohde <heroh@gmx.de> Cc: freebsd-questions@freebsd.org Subject: Re: shellscript conditional to check for external disk Message-ID: <485D7DDA.8080400@telenix.org> In-Reply-To: <200806212144.09925.heroh@gmx.de> References: <200806212144.09925.heroh@gmx.de>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Helge Rohde wrote: > Hello List, > > I need to write a backup script, and one of the required actions would be a > copy of the backup to an external firewire drive. I would like to make this > as easy as possible for the local staff, so i'd like to check whether the > drive is attached, if necessary mount it, copy over the backup and unmount > it again, so that the local staff can swap the external disks when they're > not used. > > Is there a canonical way to achieve what i want? I played with the idea of > simply checking for /dev/da0s1d's existance, but that won't disappear on > disconnect, so that would leave the is a possibility that although da0 is > in /dev, it might not be connected. > > Any ideas or RTFM-pointers? I'm not certain this will do what you want with enough security, but if you put the commands in to mount the dist into /etc/fstab, then later on your ask simply "mount <diskname>", mount will follow those rules to mount the disk, if it's indeed in existence. Putting that into a script is pretty simple. There are a huge number of backup commands ... I rather like tar, which can be made to automatically compress the output, or to ask for a single file out of the whole archive, on restoral. Either way, not hard to automate. Does this fit what you wanted? There's a good man page on fstab, and y9ou shouold read the pages on mount and tar. > > Helge > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIXX3az62J6PPcoOkRArsiAJ0f/b3bQbChB9t48EUu5HhznTaetwCfc5OJ VGflPb3nUXht709CGpaUPUQ= =/zdL -----END PGP SIGNATURE-----
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