severity 373282 wishlist
thanks
Lars Wirzenius skrev:
Attached is a patch against moreutils to add a -p/--preserve option to
sponge that prevents it from modifying the output if the input is
identical. This means that something like this:
generate-web-page | sponge -p > ~/public_html/index.html
no longer results in the output file looking modified to web browsers.
To implement this, I am afraid I felt it necessary to change a bunch of
other things, too. The code no longer keeps the entire input file in
memory, instead it uses a temporary file. I also added option parsing
with getopt_long.
I'd probably just stat the output file, and if it's the same size as the
input, mmap and memcmp it. If the comparison fails, memcpy, else return.
The getopt stuff is fine with me, at least.
- tfheen
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