Finding which file is missing

SAMZ · #1 (**permalink**) 06-22-2008

I was hoping someone ould help me with the following.

I have 2 files in a directory FILEA and FILEB. i am running a process on these 2 files but before the process can run both FILEA and FILEB need to be present.

If one or both the files are missing i need to know what file(s) is(are) missing. I am not entirely sure how to go about this problem with out using the 'test' command several nested if statements... i am sure there must be a better solution could anyone assist.

Thanks for your help.

bankai · #2 (**permalink**) 06-22-2008

What's the problem with doing nested if ?

Code:

if [ ! -f $FILEA ]
then
     if [ ! -f $FILEB ]
     then
          echo "Neither file exists"
     else
           echo "File A does not exist but file B does"
     fi
else
    if [ ! -f $FILEB ]
    then
          echo "File A exists but file B does not"
    fi
fi

chachabronson · #3 (**permalink**) 06-24-2008

I was hoping someone could expand on this for me as it could be useful.
How would you do teh below but for different file names.

i.e. say on one day FILEA.TXT is called filea.txt, or FiLeA.tXT or even fIlEa.TxT. Say the case case changes but not the file name. so if the file being checked was always the same name but differed only it uppercase or lowercase how could you do a seach so file would be picked up irrespective of the case

joeyg · #4 (**permalink**) 06-24-2008

do a

Code:

>man tr

and you will find out about its ability to translate characters all to one case as in the following

Code:

tr -s '[:upper:]' '[:lower:]'

chachabronson · #5 (**permalink**) 06-24-2008

could you give me an example as my skills are pretty poor
have chacked man tr but am confused as to how i would use to process a file irrelevant of its case...

Plus tr only appears to accept input from stdin but in above example the inputs will be filea and fileb so am even more confused

any help

joeyg · #6 (**permalink**) 06-24-2008

Code:

> file1="AbCdEf"
> file1a=$(echo "$file1" | tr [A-Z] [a-z])
> echo $file1a
abcdef

So, if you translate the filename to all lowercase, then do your comparisons, I think you will be in good shape.

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