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    Command:

    sigandset

    
    
    
    

    SYNOPSIS

           #include <signal.h>
    
           int sigemptyset(sigset_t *set);
    
           int sigfillset(sigset_t *set);
    
           int sigaddset(sigset_t *set, int signum);
    
           int sigdelset(sigset_t *set, int signum);
    
           int sigismember(const sigset_t *set, int signum);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           sigemptyset(), sigfillset(), sigaddset(), sigdelset(), sigismember():
               _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
    
    
    

    DESCRIPTION

           These functions allow the manipulation of POSIX signal sets.
    
           sigemptyset() initializes the signal set given by set  to  empty,  with
           all signals excluded from the set.
    
           sigfillset() initializes set to full, including all signals.
    
           sigaddset()  and  sigdelset() add and delete respectively signal signum
           from set.
    
           sigismember() tests whether signum is a member of set.
    
           Objects of type sigset_t must  be  initialized  by  a  call  to  either
           sigemptyset()  or  sigfillset()  before  being  passed to the functions
           sigaddset(), sigdelset() and  sigismember()  or  the  additional  glibc
           functions  described  below  (sigisemptyset(),  sigandset(),  and  sig-
           orset()).  The results are undefined if this is not done.
    
    
    

    RETURN VALUE

           sigemptyset(), sigfillset(), sigaddset(), and sigdelset() return  0  on
           success and -1 on error.
    
           sigismember()  returns  1  if signum is a member of set, 0 if signum is
           not a member, and -1 on error.  On error, these functions set errno  to
           indicate the cause.
    
    
    

    ERRORS

           EINVAL sig is not a valid signal.
    
    
    

    CONFORMING TO

           POSIX.1-2001.
    
           sigandset() places the intersection of the sets left and right in dest.
           Both functions return 0 on success, and -1 on failure.
    
           These  functions  are  nonstandard (a few other systems provide similar
           functions) and their use should be avoided in portable applications.
    
    
    

    SEE ALSO

           sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2)
    
    
    

    Linux 2013-09-24 SIGSETOPS(3)

    
    
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