struct sigaction
(see section Advanced Signal Handling); it is used to specify signal actions
to the sigvec function. It contains the following members:
sighandler_t sv_handler
int sv_mask
int sv_flags
sv_onstack.
These symbolic constants can be used to provide values for the
sv_flags field of a sigvec structure. This field is a bit
mask value, so you bitwise-OR the flags of interest to you together.
sv_flags field of a sigvec
structure, it means to use the signal stack when delivering the signal.
sv_flags field of a sigvec
structure, it means that system calls interrupted by this kind of signal
should not be restarted if the handler returns; instead, the system
calls should return with a EINTR error status. See section Primitives Interrupted by Signals.
sv_flags field of a sigvec
structure, it means to reset the action for the signal back to
SIG_DFL when the signal is received.
sigaction (see section Advanced Signal Handling); it installs the action action for the signal signum,
returning information about the previous action in effect for that signal
in old-action.
EINTR. See section Primitives Interrupted by Signals.
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