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NetBSD 6.1.5 - man page for sigset (netbsd section 3)

SIGSET(3)			   BSD 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 dis-
     position of sig remains unchanged.

RETURN VALUES
     If successful, the sigset() function returns SIG_HOLD if sig had been blocked, and the pre-
     vious 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.

BSD					  April 30, 2010				      BSD


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