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Top Forums Shell Programming and Scripting du from list with du of list total Post 302191204 by Annihilannic on Thursday 1st of May 2008 09:43:43 PM
Old 05-01-2008
There's no need for the fancy execs, just do this:

Code:
while read line
do
    # some stuff
done < $WORKLIST

To get a total, just store the output of the du command in a variable, and add them up as you go, something like this:

Code:
    echo $line
    usage=`du -hs /Volumes/image/$line | awk -F/ '{print $1}'`
    total_usage=`expr $total_usage + $usage`
    echo $usage

 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - Reads one line from standard input SYNOPSIS
line STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: line: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None DESCRIPTION
The line command copies one line, up to and including a newline, from standard input and writes it to standard output. Use this command within a shell command file to read from your terminal. The line command always writes at least a newline character. NOTES
The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead. EXIT STATUS
Success. End-of-File. EXAMPLES
To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log This shell procedure displays the message: Enter comments for the log: It then reads a line of text from the keyboard and adds it to the end of the file log. The echo ': c' command displays a : (colon) prompt. See the echo command for information about the c escape sequence. SEE ALSO
Commands: echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: read(2) Standards: standards(5) line(1)
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