Idézem/Quoting Ralph Corderoy <[email protected]>:
Hi Viktor,
> ['p', 'r', 'i', 'n', 't', 'f', ' ', "'", 'H', 'e', 'l', 'l', 'o',
> '\\', '"', '\\', 'n', "'"]
...
> It's the «\\» before the «\"» causing the problem; it's
> unspecified. One ends up with printf seeing «\"» and my printf(1p)
> says
>
> The interpretation of a <backslash> followed by any other
> sequence of characters is unspecified.
>
> Without it, I get consistent results.
>
> $ bash -c "printf 'Hello\"\n'"
> Hello"
> $ bash -c "printf 'Hello\"\n'" | sha1sum
> f8edb41250edb3fea02ea9cb68488b123773b559 -
> $ dash -c "printf 'Hello\"\n'" | sha1sum
> f8edb41250edb3fea02ea9cb68488b123773b559 -
Using b/dash -c ".." to switch shell is very misleading. Inside
double-quotes escaped characters loose their backslashes!
Well, that's not quite true, as I showed above.
Yes. In single quotes a double quote should not be escaped.
SZÉPE Viktor, üzemeltetés
https://github.com/szepeviktor/debian-server-tools/blob/master/CV.md
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