Add SPIFFS_ftruncate function

[mikee47]

This PR adds a SPIFFS_ftruncate function to hydrogen. It allows behaviour similar to POSIX ftruncate() call except it cannot be used to increase file size. It uses existing nucleus calls with additional checks.

[igrr]

@pellepl sorry for poking you directly. If we added unit tests to cover this new feature, would you consider merging this PR?

There is some interest in implementing truncate and ftruncate support, as evidenced by #218, #217, espressif/esp-idf#2234, espressif/esp-idf#2241.

We would like to avoid forking SPIFFS to add this one function.

[pellepl]

Hi @igrr, Absolutely! Ping me when the tests are added and I'll push it. Cheers / P Den ons 16 mars 2022 10:45Ivan Grokhotkov ***@***.***> skrev:

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@pellepl <https://github.com/pellepl> sorry for poking you directly. If we added unit tests to cover this new feature, would you consider merging this PR? There is some interest in implementing truncate and ftruncate support, as evidenced by #218 <#218>, espressif/esp-idf#2234 <espressif/esp-idf#2234>, espressif/esp-idf#2241 <espressif/esp-idf#2241>. We would like to avoid forking SPIFFS to add this one function. — Reply to this email directly, view it on GitHub <#278 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABG42VYY5HR335C34HQEE7TVAGUVHANCNFSM42LE2QBQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[igrr]

Thanks @mikee47, your commit has now been merged as part of #287!

[mikee47]

@igrr Great, thank you!