Best approach for getting a read/write FILE *

[szhorvat]

I am looking to write to a file, then read the result. I need to use FILE * pointers in C. What is the best way to do this with OSS-fuzz?

I am assuming that a file with a fixed name could cause conflicts during parallel fuzzing.

I am currently using the standard tmpfile() function. Are there any concerns about it?

For just reading fixed-size data, I used fmemopen(). This isn't suitable for writing to files though if we can't predict how much data will be written. There is a risk of exhausting the memory buffer.