printf: accept non-UTF-8 input in FORMAT and ARGUMENT arguments #7209
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Should fix tests/printf/printf-mb.sh
Other implementations of `printf` permit arbitrary data to be passed to `printf`. The only restriction is that a null byte terminates FORMAT and ARGUMENT argument strings (since they are C strings). The current implementation only accepts FORMAT and ARGUMENT arguments that are valid UTF-8 (this is being enforced by clap). This commit removes the UTF-8 validation by switching to OsStr and OsString. This allows users to use `printf` to transmit or reformat null-safe but not UTF-8-safe data, such as text encoded in an 8-bit text encoding. See the `non_utf_8_input` test for an example (ISO-8859-1 text).
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This is just a rebase, it compiles and passes our tests, but there are still some kinks to work out to get it to work as expected/pass GNU tests. |
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GNU testsuite comparison: |
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Rebases #6812 on #7208.