Timothy Luoma asked,
| I would like to know how to strip NULL characters from all incoming
| email. I would guess that I would have to use tr and the octal
| code, but I'd like to have the advice of this group on how-to best
| go about this.
Many versions of tr strip out nulls by force and can't be told not to,
so if that's true of your tr,
:0f
| tr
is all you need. If your version of tr understands nulls as just another
character, then
:0f
| tr -d '\000'
If the nulls are appearing only the bodies and not in the headers, then
add the `b' flag to avoid the trouble of filtering the heads.