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Full Discussion: How to redirect stderr for <file if file does not exist?
Top Forums Shell Programming and Scripting How to redirect stderr for <file if file does not exist? Post 302912395 by Michael Stora on Thursday 7th of August 2014 07:50:52 PM
Old 08-07-2014
Quote:
Originally Posted by Corona688
If the * expands to more than one file, that may cause problems.
Yes, but I know the folder numbers are unique. I another script I test the exit status of ls when there are multiple matches but in this script calling the non-builtin 'ls' bogs things down as there are about 10,000 of these files to parse.

Quote:
Originally Posted by Chubler_XL
Another thought (fetches data from 1st file, you can do anything you like in the loop with each file expanded from *).

No need to change IFS as for "knows" about the expansion

Code:
runFolder="$parentFolder""/../Run""$runNumber""*/" # traverse up one directory
valFile="$runFolder""valid"
for x in $valFile
do
   [ -f "$x" ] && valid=$(<"$x") || valid="V"
   break
done

There should only be one. If there is more than one match, I would not want to use the data. The additonal loop would slow things down. There is one predictable program writing these files so I know there is one of each type of folder for each run number.

Mike
 

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