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Storing a Function

 
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# 1  
Old 10-21-2008
CPU & Memory Storing a Function
Hi,

I am running Sco Unix v3.2B. I want to know how can I store a function I create so I can use it later simply by just calling it from the command prompt. Sorry if I am asking such a noob question.

Thanks.
# 2  
Old 10-21-2008
Hammer & Screwdriver Can you be more specific?
People use ALIAS to allow them to type a shortened version of a command or commands.
People will place scripts in a specific area, and then use the PATH logic so as to always find the scripts.

What are you trying to do exactly?
# 3  
Old 10-21-2008
I want to create a function that outputs the last 50 lines of a process's log. So say my function is called "Last50" and I want to see the last 50 lines for a process called "Traffic". I guess the function would have to look at the PID associated with the "Traffic" process, and then look for the corresponding log, and then use the CAT and TAIL functions. But how and where do I store this function so I can use it later? Hope I am clear.

Thanks.
# 4  
Old 10-21-2008
Sounds like you need to write a short shell script, and save it in a directory which is in your $PATH variable (or add the directory to $PATH). If the 'traffic' process always has it's log in the same location, I don't think you would need to search for the pid of the program. In your shell script you would just use something like
Code:
tail -n 50 < /var/traffic_log.log

...where /var/traffic_log.log is your logfile.

If this doesn't make much sense, please give some more information on what you're trying to do.
# 5  
Old 10-22-2008
I guess I can turn that into a function in the following way..

Last50()
{
tail -n 50 < /var/traffic_log.log}

But I believe this function will only be available during the session. Right? How can I permanently make this function available so that any time I am at the command prompt I can just type "Last50", and get the function to run? Is there a special folder or file where I have to put it?

Thanks
# 6  
Old 10-22-2008
It depends on what shell you are using. ksh93 has builtin support for what you are trying to do. From the ksh93 man page:
Quote:
FPATH The search path for function definitions.
The directories in this path are searched
for a file with the same name as the func-
tion or command when a function with the -u
attribute is referenced and when a command
is not found. If an executable file with
the name of that command is found, then it
is read and executed in the current environ-
ment. Unlike PATH, the current directory
must be represented explictily by . rather
than by adjacent : characters or a beginning
or ending :.
# 7  
Old 10-22-2008
my shell is "sh".
 
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