fs: add two new modes "as" and "as+"
Two new modes 'as'
and 'as+'
are added, for opening files:
-
'as'
: append in synchronous mode, -
'as+'
: read write in synchronous mode.
Fixes #18635 (closed) .
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
fs