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stage1: fix wasi_snapshot_preview1_fd_seek on cache files

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`wasm2c` uses an interesting mechanism to "fake" the existence of cache
directories. However, `wasi_snapshot_preview1_fd_seek` was not correctly
integrated with this system, so previously crashed when run on a file in
a cache directory due to trying to call `fseek` on a `FILE *` which was
`NULL`.
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mlugg 2025-03-12 02:08:02 +00:00 committed by Alex Rønne Petersen
parent 4089134892
commit ceb84c647b
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stage1/wasi.c
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@ -1003,6 +1003,8 @@ uint32_t wasi_snapshot_preview1_fd_seek(uint32_t fd, uint64_t in_offset, uint32_
default: panic("unimplemented"); default: panic("unimplemented");
} }
if (fds[fd].stream == NULL) return wasi_errno_success;
int seek_whence; int seek_whence;
switch (whence) { switch (whence) {
case wasi_whence_set: case wasi_whence_set: