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

  • BSD mandoc
     

    NAME

    
    
    sigprocmask
    
     - manipulate current signal mask
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <signal.h>
    int Fo sigprocmask Fa int how Fa const sigset_t * restrict set Fa sigset_t * restrict oset Fc  

    DESCRIPTION

    The sigprocmask ();
    system call examines and/or changes the current signal mask (those signals that are blocked from delivery). Signals are blocked if they are members of the current signal mask set.

    If Fa set is not null, the action of sigprocmask ();
    depends on the value of the Fa how argument. The signal mask is changed as a function of the specified Fa set and the current mask. The function is specified by Fa how using one of the following values from In signal.h :

    SIG_BLOCK
    The new mask is the union of the current mask and the specified Fa set .
    SIG_UNBLOCK
    The new mask is the intersection of the current mask and the complement of the specified Fa set .
    SIG_SETMASK
    The current mask is replaced by the specified Fa set .

    If Fa oset is not null, it is set to the previous value of the signal mask. When Fa set is null, the value of Fa how is insignificant and the mask remains unset providing a way to examine the signal mask without modification.

    The system quietly disallows SIGKILL or SIGSTOP to be blocked.  

    RETURN VALUES

    Rv -std sigprocmask  

    ERRORS

    The sigprocmask ();
    system call will fail and the signal mask will be unchanged if one of the following occurs:

    Bq Er EINVAL
    The Fa how argument has a value other than those listed here.

     

    SEE ALSO

    kill(2), sigaction(2), sigpending(2), sigsuspend(2), fpsetmask(3), sigsetops(3)  

    STANDARDS

    The sigprocmask ();
    system call is expected to conform to St -p1003.1-90 .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    STANDARDS


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