How to do <cmd> file | hold file

[Rod Williams]

>                          ...suppose I want to sort a file
>and place the result in the same file without destroying it,

Doesn't 'sort' allow you to do this already in one easy step?

	sort -o<file> <samefile>

...or did I misunderstand the question?
-- 
* * * * * * * * * * * * * * * * * * * * *         * * * * * * * * * *
*   Rod Williams                        *         entertain         *
*   Pacific Bell - San Ramon CA         *         a thought         *
* * * * * * * * * * * * * * * *         * * * * * * * * * * * * * * *