Shell Programming and Scripting

Hi all,

Hope that we are all familiar with the "script" command, which helps us to record the session into any file, until we give "exit".

Can anyone help me, how to do this process from a shell script!? I face problem while ending the script using "exit" which comes out of the program. This is what I coded (for eg., to record the listing command into tempfile.log):

script tempfile.log <<EOF
ls -ltr
exit
EOF

Is there any mistake!? I could smell something fishy, but unable to find it.

Thanks,

Since the script command would need to put info back to the screen, it may be a problem trying to force it into a file.

If you are looking to put the output of a command(s) into a file, just redirect for each command.
ls -ltr >> tempfile.log
pwd >> tempfile.log

Or you could invoke the script to dump output into the tempfile.log...
$ ./yourscript > ./tempfile.log

Normally, when you use script it shows not just the output, but the commands that were run to get the output. Here's another alternative that won't require you to recode in order to print every command and its output.

Add the following to the top and bottom of your script:

Code:

set -x
...
set +x

When you run your script, use the 'tee' command and redirect stderr to stdout. For example, if I had some script called test.sh:

Code:

#!/bin/sh
# test.sh
set -x
echo hello
ls -ld /etc/hosts
echo goodbye
set +x

And I wanted everything that it did and saw outputed to test.log:

Code:

$ ./test.sh 2>&1 | tee test.log
+ echo hello
hello
+ ls -ld /etc/hosts
lrwxrwxrwx   1 root     root          12 Apr 17  2002 /etc/hosts -> ./inet/hosts
+ echo goodbye
goodbye
$ 
$ cat test.log
+ echo hello
hello
+ ls -ld /etc/hosts
lrwxrwxrwx   1 root     root          12 Apr 17  2002 /etc/hosts -> ./inet/hosts
+ echo goodbye
goodbye
$

Cheers,

Keith

Hi RTM, KDUFFIN!!

Thanks for ur suggestions. It was indeed a great help.. what kduffin said was something new...

RTM, what u suggest was great, but the code then becomes full of redirections...

The right code that helped me looks something like this:

sh <<EOF>>./output.log
ls -ltr
...
EOF

This was as per the suggestions from our moderator.

Thanks