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From: envbvs@epb6.lbl.gov (Brian V. Smith)
Newsgroups: comp.unix.ultrix,comp.sys.dec
Subject: wierd interaction in csh under Ultrix 3.0
Message-ID: <2557@helios.ee.lbl.gov>
Date: 6 May 89 20:57:18 GMT
Sender: usenet@helios.ee.lbl.gov
Reply-To: envbvs@epb6.lbl.gov (Brian V. Smith)
Organization: Lawrence Berkeley Laboratory, Berkeley
Lines: 33

This is a really wierd interaction between echoing a quoted string
and the csh feature to execute a command and return the output as a value.

This works fine:

unix> echo "hello" | od -c
0000000    h   e   l   l   o  \n
________________________________________________________________________
So does this:

unix> echo hello `date` | od -c
0000000    h   e   l   l   o       S   a   t       M   a   y       6    
0000020    1   1   :   1   1   :   0   7       P   D   T       1   9   8
0000040    9  \n
________________________________________________________________________
But this has a serious problem:

unix> echo "hello" `date` | od -c
0000000  377   h 377   e 377   l 377   l 377   o       S   a   t       M
0000020    a   y       6       1   1   :   0   9   :   3   9       P   D
0000040    T       1   9   8   9  \n

Note the 377's (rubout with the eighth bit set)!

What is happening here?
_____________________________________
Brian V. Smith    (bvsmith@lbl.gov)
Lawrence Berkeley Laboratory

We don't need no signatures!
_____________________________________
Brian V. Smith    (bvsmith@lbl.gov)
Lawrence Berkeley Laboratory