File append not working with SPIFFS

[michprev]

I am experiencing a problem when trying to open a file from SPIFFS storage in append mode using C standard file api. Read/write mode works with no problems.

[me-no-dev]

can you please post some test code? I tested fopen(path, "a") and it worked as expected.

[michprev]

sure, example code: https://github.com/michprev/flyhero-esp32/tree/224f8e446d2d7854198ae4b79348077e04d56ace/Logging

Also tried to use c++ ofstream class. In this case file was not created.

[nkolban]

What is the exact nature of the problem? Is it that fopen() for append returns null? If so, what is the value of errno immediately after the fopen()?

[michprev]

I get ENOENT (No such file or directory) right after fopen(). Running

file = fopen(path, "w");
fclose(file);

file = fopen(path, "a");

works as expected. It seems like file is not created (if not exists) with "a" option.

[me-no-dev]

Issue found :) expect it to be resolved when changes are merged

[me-no-dev]

@nkolban issue was that nonexistent file was not created when it's opened with append. I guess SPIFFS append worked in a different way ;) Fix will be in today or tomorrow :)

[igrr]

Fixed in 14b12a2.