, void *dispintint)
function manipulates the disposition of the signal
The new disposition is given in
is one of
or the address of a handler function,
the disposition of
is changed accordingly, and
is removed from the process' signal mask.
is the address of a handler function,
will be added to the process' signal mask during execution of the handler.
is equal to
is added to the calling process' signal mask and the disposition of
) function returns
sighad been blocked, and the previous disposition of
sigif it had not been blocked. Otherwise
SIG_ERRis returned and errno is set to indicate the error.
) function will fail if:
sigis not a valid signal number; or an attempt is made to ignore a signal that cannot be ignored, such as
) 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.