Sign on/Sign off logging script


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Sign on/Sign off logging script
# 1  
Old 11-17-2006
Sign on/Sign off logging script

I'd like to make a script that I can execute every time I sign on to my linux box that keeps track of the time and allows to me to add a remark to a file. So basically once I log in, I run the script, and it outputs the date and time to a text file (log.txt). But that isn't my problem.

I need to know how to make it so once i've executed the script in a session, it won't allow me to execute it twice until i've run a sign out script. I'd like it to say something along the lines of "Sorry, you are already signed in!" if i've already run the sign in script.

Then, I need to know what to add to the sign OUT script in order to make it go back to normal the normal signed out state.

I don't know if this makes any sense, but any input would be appreciated! I'll be checking the thread to answer any questions as often as possible. Thanks.
# 2  
Old 11-20-2006
I guess the easiset way is to create a "lock file"

ie
The first thing you do is check to see if a "lockfile" exist, if not, then it must be the first time and you touch a filesomewhere.....ie create the lockfile

continue process the rest of the script

The last thing the script does before it ends is remove the lock file.

That way if it starts up again....it won't do any thing...because the previous execution created a lock file and is still open at that time....

does that make sense?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Forum Support Area for Unregistered Users & Account Problems

Sign in issues

I tried logging in under my username (Michael Mullig) but as it's been a while I've forgotten my password. None of my email addresses are recognized either. Thinking that my username my have been purged due to lack of activity (understandable) I tried to re-register, only to find the name is still... (2 Replies)
Discussion started by: Mike Mullig
2 Replies

2. Forum Support Area for Unregistered Users & Account Problems

Unable to sign in

I am unable to sign in to the UNIX forum. I tried my username "timotei2" and the password - but access was denied. My email address - <removed> - was not recognised, either. This is strange as I registered some years back. Should I re-register, or can nyou re-set my log in credentials? (1 Reply)
Discussion started by: Unregistered
1 Replies

3. Shell Programming and Scripting

Script to replace last instance of . between two consecutive = sign by ,

Suppose you have a line like this: cn=user.blr.ou=blr.india.o=company The line should be converted like this: cn=user.blr,ou=blr.india,o=comapny Was wondering how to do that using shell script. Please use tags where appropriate, thank you (4 Replies)
Discussion started by: saurabhkoar
4 Replies

4. Shell Programming and Scripting

SSH Script is sticking, & sign not doing what I would expect

I am having an issue where I am do an SSH to about 30 servers one at a time however my script is getting hung up sometimes on the SSH. I thought the & at the end as seen below would fire it and move on but that does not seem to be working. #!/bin/s for remsys in trumpetsnail angel delphin... (3 Replies)
Discussion started by: LRoberts
3 Replies

5. Shell Programming and Scripting

Using grep $ sign help?

hi so I was debugging some scripts and I ran into a problem that did not come up before grep -n "$variable"$ ./file.txt I figured the second $ is meant to reference the end of the line but this gave me trouble in my c shell. anyone know whats wrong here or how to rewrite this??? Thank... (2 Replies)
Discussion started by: vas28r13
2 Replies

6. Shell Programming and Scripting

Count value between | sign

Hi I have a file inw which values are seperated by "|" I want to count number of values present in each line of the file Input file AS|23 34|BD|A2|890 AK|23 44|D|A2|89076|89 AF|23 34|BD|A2|8 Result 5 6 5 there are 5 values inside | sign hence o/p will be 5 similarly in... (2 Replies)
Discussion started by: aaysa123
2 Replies

7. UNIX for Dummies Questions & Answers

@ sign in permissions?

I am using Mac OS X version 10.5.7, and had a problem accessing a folder on our shared area network. I logged in via terminal (bash shell), and did a ls -l on the main directory, and the directory that isn't showing up has an @ sign at the end: rwxr-xr-x@ 19 admin staff 2048 Jun 1 07:53... (1 Reply)
Discussion started by: aaronstella
1 Replies

8. UNIX for Dummies Questions & Answers

minus sign

why a minus sign is put for options in unix commands suggestions plz (2 Replies)
Discussion started by: trichyselva
2 Replies

9. UNIX for Dummies Questions & Answers

(+ sign) Unexpected arithmetic expr script interpretation

I have created the following script to add 2 numbers together : lazyadd2 script : #!/bin/bash #I have added the she-bang script above as I felt that this would be a good idea. #The script takes in 2 arguments that are added together num3=`expr $num1 + $num2` echo $num3 I make the... (9 Replies)
Discussion started by: Birdi6022
9 Replies

10. Shell Programming and Scripting

Meaning of % sign

Does % sign have any impact, special meaning in unix shell scripts ??? (2 Replies)
Discussion started by: sokash
2 Replies
Login or Register to Ask a Question