mjhjmtu

I'm using bash to execute complex scripts having for and wile loops.
I activate the history in the script using :

set -o history -o histexpand

But if I execute the following script:

#!/bin/bash
set -o history -o histexpand
for i in 1 2 3 4 5
do
 echo "Welcome $i times"
done
history

I can see that 'history' does not track commands inside the for loop :

[scripts]$ ~/test2.sh
Welcome 1 times
Welcome 2 times
Welcome 3 times
Welcome 4 times
Welcome 5 times
 1 for i in 1 2 3 4 5; do echo "Welcome $i times"; done
 2 history

Is there a way to track the commands inside the for loop also ? In this present sample, I would love to get the following result :

[scripts]$ ~/test2.sh
Welcome 1 times
Welcome 2 times
Welcome 3 times
Welcome 4 times
Welcome 5 times
 1 for i in 1 2 3 4 5; do echo "Welcome $i times"; done
 2 echo "Welcome $i times"
 3 echo "Welcome $i times"
 4 echo "Welcome $i times"
 5 echo "Welcome $i times"
 6 echo "Welcome $i times"
 7 history

The "history" is a history of "previously typed" commands.

From the GNU manual:

"When the -o history option to the set builtin is enabled ... the shell provides access to the command history, the list of commands previously typed."

So, it does neither substitute shell variables, nor does it save loop iterations.

For this you could use bash debugging by calling your script so:

bash -x myscript > to-my-log-file

Then, in case of a crash, you can see what happened in the log file (provided the system had had time to flush the output buffer).