Date: Wed, 06 Mar 2013 19:14:05 -0600 From: Larry Rosenman <ler@lerctr.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: tevans.uk@googlemail.com, freebsd-fs@freebsd.org, ronald-freebsd8@klop.yi.org Subject: Re: zfs send/recv invalid data Message-ID: <ccbde3358460c03a46ed75ff1d8895f9@webmail.lerctr.org> In-Reply-To: <5378B8D5A65A4F19BE1CF6C25A9CFE22@multiplay.co.uk> References: <7c93aef20a88cdbcca85739e67470dce@webmail.lerctr.org> <op.wthqmth68527sy@212-182-167-131.ip.telfort.nl> <25894116c93a59dab1fd976b425c36d1@webmail.lerctr.org> <07b59d5d4b2a3dab1385b054eea4f2da@webmail.lerctr.org> <A3EA720372254541BCCB6C92DBA36A0E@multiplay.co.uk> <7619c6383449c7a316edb1cdffc98c54@webmail.lerctr.org> <alpine.BSF.2.00.1303052052300.52489@thebighonker.lerctr.org> <473BCD0A4A7A4E6AB08409A9B0C82363@multiplay.co.uk> <d7c08e218ef301f1202354d0b11a6742@webmail.lerctr.org> <CAFHbX1LC25pyOBUGJ-PFxzTOXvJPYOF15H0%2BfTk6qfCyT-Q8fA@mail.gmail.com> <6dcfb2284551025af3cf58703a2b5cdc@webmail.lerctr.org> <920990505611cd96a075c80d06691bb0@webmail.lerctr.org> <201303061857.r26IvLnc024186@higson.cam.lispworks.com> <fc81037894dbc014853ba8fed06e427f@webmail.lerctr.org> <9e133e088f6c3c3dafdc0a99eb7c48c1@webmail.lerctr.org> <218B0537E987442EAB8027EA478F8BE9@multiplay.co.uk> <e84db628ac7be2bea86d0f4fd8d47b36@webmail.lerctr.org> <5378B8D5A65A4F19BE1CF6C25A9CFE22@multiplay.co.uk>
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On 2013-03-06 17:48, Steven Hartland wrote: > ----- Original Message ----- From: "Larry Rosenman" <ler@lerctr.org> > To: "Steven Hartland" <killing@multiplay.co.uk> > Cc: "Martin Simmons" <martin@lispworks.com>; > <tevans.uk@googlemail.com>; <freebsd-fs@freebsd.org>; > <ronald-freebsd8@klop.yi.org> > Sent: Wednesday, March 06, 2013 11:16 PM > Subject: Re: zfs send/recv invalid data > > >> On 2013-03-06 17:00, Steven Hartland wrote: >>> ----- Original Message ----- From: "Larry Rosenman" <ler@lerctr.org> >>>> # cat send.stream | ssh root@home openssl md5 >>>> (stdin)= 9cd1d73ea8411f1c222bc90e7bea3d33 >>>> # uname -a >>>> FreeBSD thebighonker.lerctr.org 8.3-STABLE FreeBSD 8.3-STABLE #54 >>>> r247820: Mon Mar 4 18:08:11 CST 2013 >>>> root@thebighonker.lerctr.org:/usr/obj/usr/src/sys/THEBIGHONKER >>>> amd64 >>>> # >>>> # exec csh >>>> root@borg:/home/ler # pwd >>>> /home/ler >>>> root@borg:/home/ler # ssh tbh "cat >>>> /home/ler/public_html/ZFS_RECV/send.stream | ssh >>>> root@home.lerctr.org openssl md5" >>>> (stdin)= 9cd1d73ea8411f1c222bc90e7bea3d33 >>>> root@borg:/home/ler # uname -a >>>> FreeBSD borg.lerctr.org 10.0-CURRENT FreeBSD 10.0-CURRENT #124 >>>> r247826: Mon Mar 4 19:59:08 CST 2013 >>>> root@borg.lerctr.org:/usr/obj/usr/src/sys/BORG-DTRACE amd64 >>>> root@borg:/home/ler # >>> When you run a command from ssh it will run as the target users >>> shell >>> so for csh if there is something bad in .cshrc or iirc .profile then >>> you may get something output purely by logging in. >>> So ensure you shell config's for the user on the target machine are >>> clean. >>> You can confirm this by comparing the output from the following >>> two commands run from the sending machine:- >>> md5 send.stream >>> cat send.stream | ssh root@home.lerctr.org "cat" |md5 >>> If these two commands produce different md5's then the login >>> shell for root on home.lerctr.org is outputing something >>> even when there is no terminal. >>> You should be able to see what the shell is outputting using:- >>> echo -n '' | ssh root@home.lerctr.org "cat" > 1.log >>> After running this 1.log should be 0 bytes if its not your >>> shell is definitely your problem and I'd start by looking >>> at .cshrc and .profile for this user, or even the globals >>> for these in /etc/ >>> >> I've done that, and get identical md5's..... >> I'm at a loss. > > I believe what you ran was similar but not identical, if you > check the quoting subtly different. > > I'm not sure that will have any effect but both of the above > are worth running just to confirm. > > Regards > Steve $ ^DConnection to thebighonker.lerctr.org closed. $ ssh root@tbh Last login: Tue Mar 5 06:51:46 2013 from cpe-72-182-19-1 FreeBSD 8.3-STABLE (THEBIGHONKER) #54 r247820: Mon Mar 4 18:08:11 CST 2013 Welcome to FreeBSD! root@thebighonker:~ # pwd /root root@thebighonker:~ # md5 /home/ler/public_html/ZFS_RECV/send send-file-snap-list send.stream send.uname root@thebighonker:~ # md5 /home/ler/public_html/ZFS_RECV/send.stream MD5 (/home/ler/public_html/ZFS_RECV/send.stream) = 9cd1d73ea8411f1c222bc90e7bea3d33 root@thebighonker:~ # cat /home/ler/public_html/ZFS_RECV/send.stream |ssh root@home.lerctr.org "cat"|md5 9cd1d73ea8411f1c222bc90e7bea3d33 root@thebighonker:~ # looks like it's clean..... Other ideas? -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: ler@lerctr.org US Mail: 430 Valona Loop, Round Rock, TX 78681-3893
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