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    SubjectRe: Lack of Documentation about SA_RESTART...
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    "Theodore Ts'o" <tytso@mit.edu> writes:

    > On Mon, Jul 11, 2005 at 12:32:37PM +0200, Paolo Ornati wrote:
    > > But what I'm looking for is a list of syscalls that are automatically
    > > restarted when SA_RESTART is set, and especially in what conditions.
    > >
    > > For example: read(), write(), open() are obviously restarted, but even
    > > on non-blocking fd?
    > > And what about connect() and select() for example?
    > >
    > > There are a lot of syscalls that can fail with "EINTR"! What's the
    > > advantage of using SA_RESTART if one doesn't know what syscalls are
    > > restarted?
    >
    > According to the Single Unix Specification V3, all functions that
    > return EINTR are supposed to restart if a process receives a signal
    > where signal handler has been installed with the SA_RESTART flag.

    Except for select() and poll(), which should always return EINTR even
    when interrupted with a SA_RESTART signal.

    Phil.
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