find - Bash redirection stops working ( using "set -x" debug outputs ) -


my main script starts : 

#!/bin/bash  set -x #debug avec des stacktrace partout set -u #erreur si variable non définie  export >$rep_frontal/env.bash  trace=$rep_frontal/traces.log exec >$trace 2>&1  source $rep_frontal/lib.sh

where rep_frontal environment variable. contains path main , lib.sh both are.

i can see outputs, including debugging (set -x) redirected file trace.log

but have line of code breaks behavior. used call function defined in sourced lib.sh file, have tried put somewhere directly in file : line seems break behavior of redirecting trace.log.

here line : 

(find $rep_frontal -type f -print0 | xargs -0 -n 10 -p 4 dos2unix  2>/dev/null)

here tail of trace.log looks : 

+ mkdir -p /somedir/a/b/ + find /path/in/rep_frontal/variable -type f -print0 + xargs -0 -n 10 -p 4 dos2unix

and : end of file..

removing redirection line not : 

(find $rep_frontal -type f -print0 | xargs -0 -n 10 -p 4 dos2unix  ) #same result line

can guess what's wrong here ? thank you

that worked : don't know why appreciate knowing. accepted answer should go on explain.

find $rep_frontal -type f -print0 | xargs -0 -n 10 -p 4 dos2unix > /dev/null 2&1

the parenthesis useless, pointed out jens in comments.


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