Fix fd with append flag can't seek correctly #5160
Merged
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This commit fixes an incompatible behavior (with other runtimes, and POSIX) when an fd that was opened with
fdflags::append
cannot seek to the right offset withfd_seek
. The append flag should not "lock" the offset at the end, as it's possible to seek to another offset and read from it.This passes all the
wasi-fyi
tests.fixes #5159