bug #1461855: make os.fdopen() add the O_APPEND flag if using "a" mode. glibc, for example, does this already on its own, but it seems that the solaris libc doesn't. This leads to Python code being able to over- write file contents even though having specified "a" mode.
bug #1461855: make os.fdopen() add the O_APPEND flag if using "a" mode.
glibc, for example, does this already on its own, but it seems that
the solaris libc doesn't. This leads to Python code being able to over-
write file contents even though having specified "a" mode.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator