preview1: Update semantics of seeking on appending files #7586
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This commit updates the semantics of `fd_{seek,tell}` on preview1 to
match native Unix when used with appending files. On Unix `write` claims
to always update the file position pointer to the end of the file, so
this commit implements that instead of the previous logic of ignoring
the position update for appending files. This currently requires an
extra roundtrip via `stat` to figure out the size of the file, but for
now that seems to be the best that can be done.
Closes bytecodealliance#7583
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For the Unix behavior I'm reading this site, specifically the "NOTES" section |
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This commit updates the semantics of
fd_{seek,tell}on preview1 to match native Unix when used with appending files. On Unixwriteclaims to always update the file position pointer to the end of the file, so this commit implements that instead of the previous logic of ignoring the position update for appending files. This currently requires an extra roundtrip viastatto figure out the size of the file, but for now that seems to be the best that can be done.Closes #7583