Junio C Hamano <gitster@xxxxxxxxx> writes:
> Johannes Schindelin <johannes.schindelin@xxxxxx> writes:
>
>> The new regexec_buf() function operates on buffers with an explicitly
>> specified length, rather than NUL-terminated strings.
>>
>> We need to use this function whenever the buffer we want to pass to
>> regexec() may have been mmap()ed (and is hence not NUL-terminated).
>>
>> Note: the original motivation for this patch was to fix a bug where
>> `git diff -G <regex>` would crash. This patch converts more callers,
>> though, some of which explicitly allocated and constructed
>> NUL-terminated strings (or worse: modified read-only buffers to insert
>> NULs).
Also, I think there is nobody that modified read-only buffer.
diffgrep_consume() does say "Yuck -- line ought to be const",
but its "line" parameter is actually a non-const exactly for
this yuckiness (iow, it knew what it was doing).
Perhaps like so?
regex: use regexec_buf()
The new regexec_buf() function operates on buffers with an explicitly
specified length, rather than NUL-terminated strings.
We need to use this function whenever the buffer we want to pass to
regexec(3) may have been mmap(2)ed (and is hence not NUL-terminated).
Note: the original motivation for this patch was to fix a bug where
`git diff -G <regex>` would crash. This patch converts more callers,
though, some of which allocated to construct NUL-terminated strings,
or worse, modified buffers to temporarily insert NULs while calling
regexec(3). By converting them to use regexec_buf() they have become
much cleaner.
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
The patch text looked good to me.
Thanks.