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Scope of variables between scripts

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# 1  
Old 07-27-2010
Scope of variables between scripts
Friends,

I am using ksh under SunoS. This is what I have

In file1.sh

Code:
NOW=$(date +"%b-%d-%y")
LOGFILE="./log-$NOW.log"

I will be using this file through file1.sh as log file.

I have another script file2.sh which is being called inside my file1.sh. I would like to use the same log file to capture the events that are happening inside file2.sh as well. Is it possible? How do I do it?
# 2  
Old 07-27-2010
Hi.

export the variables when you declare them in file1.sh:

Code:
NOW=$(date +"%b-%d-%y")
LOGFILE="./log-$NOW.log"
export NOW LOGFILE

and they will be available to you in file2.sh.
# 3  
Old 07-27-2010
scott thanks for your reply. This works! I wonder why this statement

Code:
echo "Some Warning" | tee -a $LOGFILE

displays the string Some Warning both on the standard output device (monitor) and also writes on the log file.

Is it because I am manually executing the script? Will it be fixed if I run that script in a crontab? or am I doing something wrong?
# 4  
Old 07-27-2010
Quote:
Originally Posted by dahlia84
scott thanks for your reply. This works! I wonder why this statement

Code:
echo "Some Warning" | tee -a $LOGFILE

displays the string Some Warning both on the standard output device (monitor) and also writes on the log file.

Is it because I am manually executing the script? Will it be fixed if I run that script in a crontab? or am I doing something wrong?
Hi.

That's what it's supposed to do.

Code:
tee Command

Purpose
       Displays the output of a program and copies it into a file.

If you only want the output in a file use

Code:
echo "Some Warning" >> $LOGFILE

instead.

If left like this, in a cronjob, you will get the output in your mailbox.
# 5  
Old 07-27-2010
Thanks scott for your time. I got it now.

Code:
echo "Some Warning" >> $LOGFILE

This command does not seem to create the $LOGFILE if $LOGFILE does not exist. That's why I am using | tee.
# 6  
Old 07-27-2010
Quote:
Originally Posted by dahlia84
Thanks scott for your time. I got it now.

Code:
echo "Some Warning" >> $LOGFILE

This command does not seem to create the $LOGFILE if $LOGFILE does not exist. That's why I am using | tee.
Well, provided that LOGFILE is set at the time, it should create the file if it doesn't exist:

Code:
>>word             Use  file    word  as  standard output. If the file exists,
                   then output is appended to it (by first  seeking  to  the
                   end-of-file). Otherwise, the file is created.

otherwise it will just go to the screen.:
Code:
$ unset LOGFILE
$ echo "Some Warning" >> $LOGFILE
blah

This User Gave Thanks to Scott For This Post:
dahlia84
# 7  
Old 07-27-2010
Scott - I lack basics! I search google and ask forum members for help when ever I am stuck. When they give me the solution I feel like I lack the basics... I want to master myself in ksh. I should be able to write date manipulation programs, sending e-mail, etc such real time scripts in ksh. Can you suggest me few books which has some exercises as well, please?
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