n>&m redirection and alias expansion in bash 1.01

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4 total messages Started by J. Michael Berkley Mon, 26 Jun 1989 22:49

#150

Author: J. Michael Berkley
Date: Mon, 26 Jun 1989 22:49

23 lines
1028 bytes

I am still having trouble with	

	foo 2>&1 > foo.out

I was always getting the error message:

	syntax error near `&%1'

With the help of an inciteful friend, I discovered that the problem
is with some of my favourite aliases:

	alias 1='%1'

It seems that bash does alias expansion after "&" even though the "&"
doesn't indicate a background job.

 Mike Berkley, University of Waterloo
 PAMI Lab
 jmberkley@watnext.waterloo.edu
 {utai,uunet}!watmath!watnext!jmberkley

PS - This is on a uVax running Ultrix and bash 1.01 compiled with
bison and gcc.

Re: n>&m redirection and alias expansion in bash 1.01

#151

Author: Jean-Francois Lamy
Date: Tue, 27 Jun 1989 11:35

13 lines
877 bytes

jmberkley@watnext.waterloo.edu (J. Michael Berkley) writes:

>	foo 2>&1 > foo.out

(Independently of the problem with aliases): you should be saying

	foo > foo.out 2>&1 

if you want to follow "sh" usage (and bash usage if it follows sh semantics
for redirection).  Order of indirection does matter.

Jean-Francois Lamy               lamy@ai.utoronto.ca, uunet!ai.utoronto.ca!lamy
AI Group, Department of Computer Science, University of Toronto, Canada M5S 1A4

Re^2: n>&m redirection and alias expansion in bash 1.01

#165

Author: Maarten Litmaath
Date: Tue, 27 Jun 1989 21:35

17 lines
1163 bytes

lamy@ai.utoronto.ca (Jean-Francois Lamy) writes:
\jmberkley@watnext.waterloo.edu (J. Michael Berkley) writes:
\
\>	foo 2>&1 > foo.out
\
\(Independently of the problem with aliases): you should be saying
\
\	foo > foo.out 2>&1 
\
\if you want to follow "sh" usage (and bash usage if it follows sh semantics
\for redirection).  Order of indirection does matter.

Precisely! What if Michael wanted to dup stderr to the original stdout and
redirect stdout to a file?
-- 
"I HATE arbitrary limits, especially when |Maarten Litmaath @ VU Amsterdam:
   they're small."  (Stephen Savitzky)    |maart@cs.vu.nl, mcvax!botter!maart

Re: Re^2: n>&m redirection and alias expansion in bash 1.01

#174

Author: J. Michael Berkley
Date: Thu, 29 Jun 1989 02:57

12 lines
1279 bytes

lamy@ai.utoronto.ca (Jean-Francois Lamy) writes:
   \if you want to follow "sh" usage (and bash usage if it follows sh semantics
   \for redirection).  Order of indirection does matter.

In article <2809@solo3.cs.vu.nl> maart@cs.vu.nl (Maarten Litmaath) writes:
   Precisely! What if Michael wanted to dup stderr to the original stdout and
   redirect stdout to a file?

Argh.  I am thankful to everyone who has pointed out that my ordering
was incorrect, but the real problem is with bash and incorrect alias
expansion.  Ordering is not very important when bash is giving syntax
errors because of an alias.

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