RE: rm feature: don't attempt to remove the same file twice

[Ed Avis]

In fact, 'rm -f a a' still does twice the filesystem operations.
It still calls newfstatat(AT_FDCWD, "a", ...) twice and unlinkat(AT_FDCWD, "a", 
0) twice, on my system.

What I am suggesting is to check for the same filename string having been seen 
before and avoid touching the filesystem.
This is a small user-friendliness improvement in the mode without -f, since 
"warning: file 'a' specified twice" is easier to understand
than "cannot remove 'a': No such file or directory", but it is also a 
performance improvement.
Pretty marginal I admit, except perhaps for a network filesystem hosted by a 
server on the other side of the planet.

-- 
Ed Avis <address@hidden>

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