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Shell Programming and Scripting

a simple loop

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Top Forums Shell Programming and Scripting a simple loop
# 1  
Old 11-25-2010
Data a simple loop
Does any body can help me with a loop in this example?
Code:
if [ "$i" -eq 1 -a "$#" -ge 1 ]
then
    if [ "$#" -ne 1 ]
       then
        runner=$(grep "$1" "$2")
    runne=$(grep "$1" "$3")
        run=$(grep "$1" "$4")
    fi
fi

#                                                                                
# Message on screen or mail or both                                              
#                                                                                

if [ "$mailopt" = FALSE ]
    then
      echo "*****************************"
      echo "$2:$runner"
      echo "$3:$runne"
      echo "$4:$run"
      echo "*****************************"
    else
      echo "You have mail!"
      run=$(whoami | cut -c1-8)
      echo "pattern $1 found in file $2:\                                        
            $runner" | mail $run
fi

Instead of specifying $1 $2 $3 with different variables (runner, runne, run). Can you guys help me to change it with a loop so it accepts several files and the output would show the pattern dog in different files
Just what grep does (grep dog file1 file2 file3).
file1: cat dog house
file2: dog cat house
file3: house dog cat
Thanks I just cannot find out how to make that little detail. Thanks.
Last edited by Scott; 11-25-2010 at 03:10 AM.. Reason: Added code tags
# 2  
Old 11-25-2010
Please, use code tags.
Somthing like
bash code:
  1. if (($#<2)); then
  2.    echo "There must be at least 2 parameters (pattern, file)"
  3.    exit 1
  4. fi
  5. Pattern="$1"
  6. shift
  7. Response=$(grep "$Pattern" "$@")
  8. # Message on screen or mail or both 
  9. if &#91; "$mailopt" = FALSE ]; then
  10.    echo "*****************************"
  11.    echo "$Response"
  12.    echo "*****************************"
  13. else
  14.    echo "You have mail!"
  15.    run=$(whoami | cut -c1-8)
  16.    echo "pattern $1 found: 
  17. $Response" | mail ...
  18. fi
This User Gave Thanks to frans For This Post:
bartsimpsong
# 3  
Old 11-25-2010
If you change frans' first line to:
Code:
if [ $# -lt 2 ]; then

it will run in many shells other than bash
This User Gave Thanks to Scrutinizer For This Post:
bartsimpsong
# 4  
Old 11-25-2010
Thank you
Thank you very much guys. Happens that some times I want to reinvent the wheel. Thank you thank you.
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