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sigsuspend (2)
  • >> sigsuspend (2) ( Solaris man: Системные вызовы )
  • sigsuspend (2) ( FreeBSD man: Системные вызовы )
  • sigsuspend (2) ( Русские man: Системные вызовы )
  • sigsuspend (2) ( Linux man: Системные вызовы )
  • sigsuspend (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    sigsuspend - install a signal mask and suspend caller until signal
     
    

    SYNOPSIS

    #include <signal.h>
    
    int sigsuspend(const sigset_t *set);
    

     

    DESCRIPTION

    The sigsuspend() function replaces the caller's signal mask with the set of signals pointed to by the set argument and suspends the caller until delivery of a signal whose action is either to execute a signal catching function or to terminate the process. If the set argument points to an invalid address, the behavior is undefined and errno may be set to EFAULT.

    If the action is to terminate the process, sigsuspend() does not return. If the action is to execute a signal catching function, sigsuspend() returns after the signal catching function returns. On return, the signal mask is restored to the set that existed before the call to sigsuspend().

    It is not possible to block signals that cannot be ignored (see signal.h(3HEAD)). This restriction is silently imposed by the system.  

    RETURN VALUES

    Since sigsuspend() suspends the caller's execution indefinitely, there is no successful completion return value. On failure, it returns -1 and sets errno to indicate the error.  

    ERRORS

    The sigsuspend() function will fail if:

    EINTR

    A signal was caught by the caller and control was returned from the signal catching function.

    The sigsuspend() function may fail if:

    EFAULT

    The set argument points to an illegal address.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    sigaction(2), sigprocmask(2), sigwait(2), signal(3C), signal.h(3HEAD), sigsetops(3C), attributes(5)  

    NOTES

    If the caller specifies more than one unblocked signal in the mask to sigsuspend(), more than one signal might be processed before the call to sigsuspend() returns.

    While the caller is executing the signal handler that interrupted its call to sigsuspend(), its signal mask is the one passed to sigsuspend(), modified as usual by the signal mask specification in the signal's sigaction(2) parameters. The caller's signal mask is not restored to its previous value until the caller returns from all the signal handlers that interrupted sigsuspend().


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO
    NOTES


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