Zbigniew Jędrzejewski-Szmek
7d9337ed77
Before, sd_netlink_message_read() expected to fill a buffer completely, and would return -EIO if the attribute being read was shorter than the buffer. This means that the function can be used to "peek" into attributes (by specifying a short buffer to just read part of the attribute), but cannot be used to read something into a union without knowing beforehand which specific field in the union is being filled. That latter operation seems more useful (messages are short, so we don't really need to do partial reads), so let's allow reads that don't fill the output buffer completely.
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