Need to create a simple script using MD5, SSH... Post: 302503031

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Top Forums Shell Programming and Scripting Need to create a simple script using MD5, SSH... Post 302503031 by Corona688 on Wednesday 9th of March 2011 01:13:37 PM

03-09-2011

Registered User

I'd be more interested in the contents of /home/izivanov/iz3 actually...

I spotted an error in my script. I left a bname in when inappropriate.

And one really should check the return value of md5 here. It bizzarely spews its errors to stdout, so whenever something goes wrong, the loop checks garbage vs garbage and decides everything's OK.

Code:

# If you don't have mktemp, TMP=/tmp/$$ will do.  mktemp is more secure.
TMP=`mktemp`
while read fname; do 
    #bname=$(basename $fname) 
    echo "trying ${fname}" >&2

    if ! /usr/local/bin/md5 "$fname" > "$TMP"
    then
        echo "md5 on ${bname} failed: "
        # print the error
        cat "$TMP"
        continue
    fi

    hash=$(awk '{print $4}' "$TMP")

    echo "local hash is ${hash}" >&2

    # should just print the md5's
    /usr/local/bin/hosts | while read box
    do
        T=$(ssh ${box} "/usr/local/bin/md5" "$fname" | awk '{ print $4;}')
        [ "$T" = "$hash" ] || echo "${box} $fname differs!"
    done

done < /home/izivanov/iz3

# clean up temp file
rm -f "$TMP"

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racc(1) 						      General Commands Manual							   racc(1)

NAME

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SYNOPSIS

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OPTIONS

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