Why 'script' utility require SHELL (and work fine under Linux)?

Fri Oct 14 09:44:00 GMT 2011

Look to my session:

ï»¿  gavenko+bash# echo $SHELL
   /bin/bash
   gavenko+bash# script
   Ð¡ÐºÑ€Ð¸Ð¿Ñ‚ Ð·Ð°Ð¿ÑƒÑ‰ÐµÐ½, Ñ„Ð°Ð¹Ð» - typescript
                                    sh-4.1$ ^C
   sh-4.1$ exit
   Ð¡ÐºÑ€Ð¸Ð¿Ñ‚ Ð²Ñ‹Ð¿Ð¾Ð»Ð½ÐµÐ½, Ñ„Ð°Ð¹Ð» - typescript

   gavenko+bash# SHELL=/bin/bash script
   Ð¡ÐºÑ€Ð¸Ð¿Ñ‚ Ð·Ð°Ð¿ÑƒÑ‰ÐµÐ½, Ñ„Ð°Ð¹Ð» - typescript
                                    gavenko+bash# ^C
   gavenko+bash# exit
   Ð¡ÐºÑ€Ð¸Ð¿Ñ‚ Ð²Ñ‹Ð¿Ð¾Ð»Ð½ÐµÐ½, Ñ„Ð°Ð¹Ð» - typescript

   gavenko+bash# export SHELL
   gavenko+bash# script
   Ð¡ÐºÑ€Ð¸Ð¿Ñ‚ Ð·Ð°Ð¿ÑƒÑ‰ÐµÐ½, Ñ„Ð°Ð¹Ð» - typescript
                                    gavenko+bash# ^C
   gavenko+bash# exit

As you can see first time script does not use SHELL, second time use it
and third tie use it.

So SHELL env var does not exported by bash...

Why?

Is this right add

   export SHELL

to '~/.bashrc'?

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