Путеводитель по Руководству Linux

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   rt_sigaction    ( 2 )

изучить и изменить сигнальное действие (examine and change a signal action)

  Name  |  Synopsis  |  Description  |  Return value  |  Error  |  Conforming to  |  Note  |    Bugs    |  Examples  |  See also  |

Ошибки (баги) (Bugs)

When delivering a signal with a SA_SIGINFO handler, the kernel does not always provide meaningful values for all of the fields of the siginfo_t that are relevant for that signal.

In kernels up to and including 2.6.13, specifying SA_NODEFER in sa_flags prevents not only the delivered signal from being masked during execution of the handler, but also the signals specified in sa_mask. This bug was fixed in kernel 2.6.14.