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Top Forums Shell Programming and Scripting [Solved] problem - connecting code with external file Post 302607871 by balajesuri on Thursday 15th of March 2012 02:03:32 PM
Old 03-15-2012
Code:
#!/bin/sh
total1024=0
total2048=0
total8192=0
if [ $# -eq 1 ] ; then
    if [ -e "$1" ] ; then
        while read variable
        do
            if [ `echo "$variable" | cut -f 2 -d'/'` = 1024 ] ; then
                total1024=$(( $total1024 + 1 ))
            fi
            if [ `echo "$variable" | cut -f 2 -d'/'` = 2048 ] ; then
                total2048=$(( $total2048 + 1 ))
            fi
            if [ `echo "$variable" | cut -f 2 -d'/'` = 8192 ] ; then
                total8192=$(( $total8192 + 1 ))
            fi
        done < $1
        echo "$total1024"
        echo "$total2048"
        echo "$total8192"
    else
        echo "Wrong file name."
        break
    fi

elif [ $# -eq 0 ] ; then
    echo "No parameter was given."
    break
else
    echo "Too many parameters."
    break
fi

Code:
$ ./test.sh external_file
2
3
2

You may reduce typing effort by introducing a case statement instead of three if's:
Code:
        while read variable
        do
            case `echo "$variable" | cut -f2 -d'/'` in
                1024 ) total1024=$(( $total1024 + 1 )) ;;
                2048 ) total2048=$(( $total2048 + 1 )) ;;
                8192 ) total8192=$(( $total8192 + 1 )) ;;
            esac
        done < $1


Last edited by balajesuri; 03-15-2012 at 03:09 PM..
This User Gave Thanks to balajesuri For This Post:
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
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