we should read the POST-data from the read callback

(but didn't crash or anything)

do if the write would've blocked

filename field of that part. A typical example line could look like:

-F 'name=@filename;filename=/dev/null'

This can be combined with type= too, in a manner similar to:

-F "file=@log/test39.txt;filename=fakerfile;type=moo/foobar"

Enjoy.

part.

with a #define to preserve backwards compatibiltiy

truly fopen()ed. It could end up fclose()ing a NULL as discovered by
Clifford Wolf.

NULL set back the internal default function

after the transfer is done properly

ages ago

to keep track of too