From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 26 Jun 2019 18:04:55 GMT
Subject: Re: [GSoC][PATCH v7 06/10] dir-iterator: add flags parameter to dir_iterator_begin
Message-ID: <xmqqwoh8cjeg.fsf@gitster-ct.c.googlers.com>
In-Reply-To: <nycvar.QRO.7.76.6.1906261528360.44@tvgsbejvaqbjf.bet>

Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

> Hi Matheus,
>
> On Tue, 18 Jun 2019, Matheus Tavares wrote:
>
>>[...]
>> +/*
>> + * Look for a recursive symlink at iter->base.path pointing to any directory on
>> + * the previous stack levels. If it is found, return 1. If not, return 0.
>> + */
>> +static int find_recursive_symlinks(struct dir_iterator_int *iter)
>> +{
>> +	int i;
>> +
>> +	if (!(iter->flags & DIR_ITERATOR_FOLLOW_SYMLINKS) ||
>> +	    !S_ISDIR(iter->base.st.st_mode))
>> +		return 0;
>>
>> +	for (i = 0; i < iter->levels_nr; ++i)
>> +		if (iter->base.st.st_ino == iter->levels[i].ino)
>
> This does not work on Windows. [[ Windows port does not have
> usable st_ino field ]]]

And if you cross mountpoint, st_ino alone does not guarantee
uniqueness; you'd need to combine it with st_dev, I would think,
even on POSIX systems.