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Full Discussion: adding text to a file
Top Forums Shell Programming and Scripting adding text to a file Post 302364659 by cfajohnson on Friday 23rd of October 2009 03:21:15 PM
Old 10-23-2009
Quote:
Originally Posted by sdanner
The file2 layout that you show does not reflect what you stated as "append" the name to the file, but I'm assuming append (meaning at the end of the file). I'm also assuming that each name is on a separate line in file2. Considering those assumptions, here is what I came up with for an example in bash:

Code:
#!/bin/bash

#
#       check arguments
#
if (( $# != 2 ))


Non-standard. Use:

Code:
if [ $# -ne 2 ]

Quote:
Code:
then
        echo ""
        echo $0 : Invalid number of arguments $#
        echo ""
        exit 1
fi

#
#       declare variables (easier read)
#
declare file1=$1
declare file2=$2


declare is non-standard and unnecessary.
Quote:
Code:
#
#       read each line in file1, check if it exists in
#       file2, and if not, then append it.
#
cat $file1 | \


UUOC and the backslash is unnecessary.
Quote:
Code:
while read name
do
        egrep -s $name $file2
        if (( $? != 0 ))


See above.
Quote:
Code:
        then
                echo $name >> $file2
                echo "added name "$name
        fi
done

let me know if this does it, or if my assumptions are wrong.
 

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