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Top Forums Shell Programming and Scripting Is it possible in a shell script to modify itself ?? Post 67271 by sehgalniraj on Tuesday 22nd of March 2005 06:07:06 AM
Old 03-22-2005
Is it possible in a shell script to modify itself ??

We are running a quiz and the data collected from the quiz is submitted to the database. My requirement is to write a shell script to get these submitted records.

I should be able to run this shell script at any time and the records it returns should be the ones submitted after the script was last run.

For eg : Assume i ran a script today and the number of records returned are 19, if i ran this script again tomorrow, the records i shd get should be the one submitted after today (excluding 19 records).

i will prefer using a variable in shell script which will hold the last run time.

for eg :
In my shell script can i declare a variable (last_run_time) in the begining, Use this variable thru the code and before exiting the shell script update this variable with the current date

.... shell script start .....
last_run_time=16/03/2005 10:10:10
..
spool test
select * from table1 where creattion_date > $last_run_time;
spool off
..

****
Here i wanted to update the last_run_time variable (declared above) with the current date, so that the next time i run the script i shd get the records which are inserted after i last ran the query
****
.... shell script end .....


Regards
 

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QUIZ(6) 							 BSD Games Manual							   QUIZ(6)

NAME
quiz -- random knowledge tests SYNOPSIS
quiz [-t] [-i file] [question answer] DESCRIPTION
The quiz utility tests your knowledge of random facts. It has a database of subjects from which you can choose. With no arguments, quiz displays the list of available subjects. The options are as follows: -t Use tutorial mode, in which questions are repeated later if you didn't get them right the first time, and new questions are presented less frequently to help you learn the older ones. -i Specify an alternative index file. Subjects are divided into categories. You can pick any two categories from the same subject. quiz will ask questions from the first cate- gory and it expects answers from the second category. For example, the command ``quiz victim killer'' asks questions which are the names of victims, and expects you to answer with the cause of their untimely demise, whereas the command ``quiz killer victim'' works the other way around. If you get the answer wrong, quiz lets you try again. To see the right answer, enter a blank line. Index and Data File Syntax The index and data files have a similar syntax. Lines in them consist of several categories separated by colons. The categories are regular expressions formed using the following meta-characters: pat|pat alternative patterns {pat} optional pattern [pat] delimiters, as in pat[pat|pat]pat In an index file, each line represents a subject. The first category in each subject is the pathname of the data file for the subject. The remaining categories are regular expressions for the titles of each category in the subject. In data files, each line represents a question/answer set. Each category is the information for the question/answer for that category. The backslash character (``'') is used to quote syntactically significant characters, or at the end of a line to signify that a continuation line follows. If either a question or its answer is empty, quiz will refrain from asking it. FILES
/usr/share/games/quiz.db The default index and data files. BUGS
quiz is pretty cynical about certain subjects. BSD
May 31, 1993 BSD
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