I was reading about if else in a book. Below script was given a example.
One weird thing which I noticed was , this will only read that file which is created through this script. Even if you try to make this script read another file(dat file)if will only show the output of the file Which is created by this.
I created a file khare using this script and pass age 27 in the file.
Code:
#!/bin/sh
# Prompt for a user name...
echo "Please enter your name:"
read USERNAME
# Check for the file.
if [ -s ${USERNAME}_DAT ]; then
# Read the age from the file.
AGE=`cat ${USERNAME}_DAT`
echo "You are $AGE years old!"
else
# Ask the user for his/her age
echo "How old are you?"
read AGE
if [ "$AGE" -le 2 ]; then
echo "You are too young!"
else
if [ "$AGE" -ge 100 ]; then
echo "You are too old!"
else
# Write the age to a new file.
echo $AGE > ${USERNAME}_DAT
fi
fi
fi
now when I run the script , passing the file khare(created through this script ) it show output as below.
Code:
$
Please enter your name:
khare
You are 27 years old!
You are 27 years old!
$
Now I created a file by vi command , file name as D_DAT and content inside this is FW Now when I ran the script It ask for file mane which I gave as a D_DAT . now what I see now is instead of displaying “FW” it is again asking the age . Now I pass 45 for the age. After this I noticed that script has created the a new file as D_DAT_DAT.
I am fail to understand why this script is not reading the file which is already present in the system.
Last edited by scriptor; 07-20-2012 at 08:30 AM..
Reason: miss some info
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LEARN ABOUT CENTOS
installsieve
INSTALLSIEVE(1) General Commands Manual INSTALLSIEVE(1)
*
NAME
installsieve - user utility for managing sieve scripts
SYNOPSIS
installsieve
DESCRIPTION
installsieve is a utility that allows users to manage their sieve scripts kept on the server.
OPTIONS -v <name> View script with the given name. The script if retrieved sucessfully is output to standard output.
-l List all of the scripts currently on the server. If one of the scripts is active a arrow is printed indicating that it is the active
script.
-p <port> Port to connect to. If left off this defaults to "sieve" as defined in /etc/services.
-i <file> Install a file onto the server. If a script with the same name already exists on the server it is overwritten. Upon sucessfully
putting the script on the server the script is set active. If <file> has the extension .script it is chopped when put on the server since
sieve names may not contain a '.'.
-a <name> Set <name> as the active script. The list of available names can be obtained from the '-l' option..
-d <name> Delete the sieve script on the server with <name>.
-m <mechanism> Force installsieve to use <mechanism> for authentication. If not specified the strongest authentication mechanism is chosen.
-g <name> Get the sieve script with <name> and save it to disk with a ".script" extension. If a file with that name already exists it is
overwritten.
-u <user> Userid/Authname to use for authentication; by default, the current user.
CMU Project Cyrus INSTALLSIEVE(1)