Standard C Library Functions                        sigsetops(3C)



NAME
     sigsetops, sigemptyset,  sigfillset,  sigaddset,  sigdelset,
     sigismember - manipulate sets of signals

SYNOPSIS
     #include 

     int sigemptyset(sigsett *set);


     int sigfillset(sigsett *set);


     int sigaddset(sigsett *set, int signo);


     int sigdelset(sigsett *set, int signo);


     int sigismember(sigsett *set, int signo);


DESCRIPTION
     These functions manipulate sigsett data types, representing
     the set of signals supported by the implementation.


     The sigemptyset() function initializes the set pointed to by
     set to exclude all signals defined by the system.


     The sigfillset() function initializes the set pointed to  by
     set to include all signals defined by the system.


     The sigaddset() function adds the individual  signal  speci-
     fied by the value of signo to the set pointed to by set.


     The  sigdelset()  function  deletes  the  individual  signal
     specified  by  the value of signo from the set pointed to by
     set.


     The sigismember() function checks whether the signal  speci-
     fied by the value of signo is a member of the set pointed to
     by set.


     Any object of type sigsett must be initialized by  applying
     either  sigemptyset()  or  sigfillset()  before applying any
     other operation.



SunOS 5.11          Last change: 19 Dec 2003                    1






Standard C Library Functions                        sigsetops(3C)



RETURN VALUES
     Upon  successful  completion,  the  sigismember()   function
     returns  1 if the specified signal is a member of the speci-
     fied set, or 0 if it is not.


     Upon successful completion, the other  functions  return  0.
     Otherwise  -1  is  returned and errno is set to indicate the
     error.

ERORS
     The sigaddset(), sigdelset(),  and  sigismember()  functions
     will fail if:

     EINVAL    The value of the signo argument  is  not  a  valid
               signal number.



     The sigfillset() function will fail if:

     EFAULT    The set argument specifies an invalid address.


ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     Async-Signal-Safe           
    


SEE ALSO
     sigaction(2), sigpending(2), sigprocmask(2),  sigsuspend(2),
     signal.h(3HEAD), attributes(5), standards(5)













SunOS 5.11          Last change: 19 Dec 2003                    2