Shell Programming and Scripting

Hi,
I am having one script to run the multiple offline programs simultaneously. On that script I want to format the log file (which I redirected the STDOUT to a file) in a standard format. I want to do this while running the program not later. How to do this?
Pls do the needful.

For example.

time: processid:scriptname:log message

121055:27819:myscript1:welcome to myscript1.

If I understand your question correctly, you want to run a script which calls multiple commands all of which are redirected to a single logfile. You can redirect the STDOUT and STDERR upon entry into the calling script. All subsequent commands will inherit the redirection from the calling script.

Code:

#!/bin/ksh

    exec 1>>/var/log/script.log 2>&1

    command1
    command2
    command3

One short-coming would be that you would not necessarily know which command generated which errors unless they're sufficiently different. By adding an echo before each command, you would know in which command you were when messages were generated.

Code:

#!/bin/ksh

    exec 1>>/var/log/script.log 2>&1

    echo "$0 (I) Starting command1"
    command1
    echo "$0 (I) Starting command2"
    command2
    echo "$0 (I) Starting command3"
    command3

Upon reflection, I don't think I'm grasping the problem. Could you please provide a little more detail? Thanks.

Perhaps this is more to your point:

Create a "stub" script to which you will pass the command you want to execute complete with options. It will initially display the data you desire then call the specified command.

/usr/local/bin/logit.ksh

Code:

#!/bin/ksh

    echo "$(date +'%y%m%d'):$$:$1:\c"

    exec $*

In the calling script:

/usr/local/bin/logit.ksh ls -l /var/log

will output something like this:

070224:11245:ls:total 36
-rw------- 1 root sys 0 Sep 30 2005 authlog
-rw-r--r-- 1 root other 639 Feb 14 2006 sysidconfig.log
-rw-r--r-- 1 root other 5375 Feb 24 06:59 syslog
-rw-r--r-- 1 root sys 8319 Sep 3 08:02 syslog.0
-rw-r----- 1 root sysadmin 1325 Feb 24 07:47 tcplog

HI,
I am running hundreds of programs in the backround using my script.
I am using
nohup scriptname > conlog.log 2>&1 & inside the script.

I want to format the log file conlog.log. I hope u understood this time.
The format should be like this...

timestamp : process id : scriptname : output message

Tnx.

The "stub" script I posted after my original post and just before your second post would provide you the basic functionality you're looking for. However, if the output message is more than one line, the messages from all of those processes could get jumbled.

I suspect that you want each messages from a given program to display the time, processid, and program name. If that is correct, then I'll have to ponder that one. I suspect there is way to extend the stub script.

Here is a slightly improved version of the stub script:

/usr/local/bin/logit.ksh

Code:

#!/bin/ksh

    $* | while read MSG
    do
        echo "$(date +'%y%m%d'):$$:$1:$MSG"
    done

called from you main script as

/usr/local/bin/logit.ksh scriptname args ... &

This will preceed each line of output from scriptname with the desired timestamp, processid, and command. However, the process ID will be that of the logit.ksh script not the actual scriptname. Using ptree, you'd be able to determine which logit.ksh goes with scriptname.

It's not perfect, but we're getting closer I hope.