After I said on the list yesterday that
cat rrobinlist | sed > 's/^\([^,]*\),\(.*\)/\2,\1/' > rrobinlist
would not work (would null out the file after the redirect to the file),
I had private mail with the original author, Lee Howard, who showed
me that it does work for him. I investigated, and found out that
he's right - as long as the environment setting for noclobber is
not turned on. (I keep it turned on.) With noclobber set, then
even "cat file | sed whatever > file" nulls out file.
I also nominated the phrase for a UUCA. I must, with chagrin,
recall my nomination, as it was not useless at all.
"sed whatever < file > file" will not work (nulls out file), while
the original statement with cat does work (provided noclobber is
not set).
This is just to set the record straight. I was wrong, it seems.
--
Dallman Ross <dman(_at_)nomotek(_dot_)com>
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