sigset(3) - NetBSD Manual Pages

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SIGSET(3)               NetBSD Library Functions Manual              SIGSET(3)


NAME

     sigset -- manipulate signal dispositions


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <signal.h>

     void (*
     sigset(int sig, void (*disp)(int)))(int);


DESCRIPTION

     This interface is made obsolete by sigaction(2) and sigprocmask(2).

     The sigset() function manipulates the disposition of the signal sig.  The
     new disposition is given in disp.

     If disp is one of SIG_DFL, SIG_IGN, or the address of a handler function,
     the disposition of sig is changed accordingly, and sig is removed from
     the process' signal mask.  Also, if disp is the address of a handler
     function, sig will be added to the process' signal mask during execution
     of the handler.

     If disp is equal to SIG_HOLD, sig is added to the calling process' signal
     mask and the disposition of sig remains unchanged.


RETURN VALUES

     If successful, the sigset() function returns SIG_HOLD if sig had been
     blocked, and the previous disposition of sig if it had not been blocked.
     Otherwise SIG_ERR is returned and errno is set to indicate the error.


ERRORS

     The sigset() function will fail if:

     [EINVAL]           The argument sig is not a valid signal number; or an
                        attempt is made to ignore a signal that cannot be
                        ignored, such as SIGKILL or SIGSTOP.


SEE ALSO

     sigaction(2), sigprocmask(2)


STANDARDS

     The sigset() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').  It
     was however marked as obsolete in the IEEE Std 1003.1-2008 (``POSIX.1'')
     revision of the standard.

NetBSD 9.3                      April 30, 2010                      NetBSD 9.3