The GNU C Library
24.10.1 BSD Function to Establish a Handler
- Data Type: struct sigvec
- This data type is the BSD equivalent of
struct sigaction
(see section 24.3.2 Advanced Signal Handling); it is used to specify signal actions
to the sigvec function. It contains the following members:
sighandler_t sv_handler
- This is the handler function.
int sv_mask
- This is the mask of additional signals to be blocked while the handler
function is being called.
int sv_flags
- This is a bit mask used to specify various flags which affect the
behavior of the signal. You can also refer to this field as
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.
- Macro: int SV_ONSTACK
- If this bit is set in the
sv_flags field of a sigvec
structure, it means to use the signal stack when delivering the signal.
- Macro: int SV_INTERRUPT
- If this bit is set in the
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 24.5 Primitives Interrupted by Signals.
- Macro: int SV_RESETHAND
- If this bit is set in the
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.
- Function: int sigvec (int signum, const struct sigvec *action,struct sigvec *old-action)
- This function is the equivalent of
sigaction (see section 24.3.2 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.
- Function: int siginterrupt (int signum, int failflag)
- This function specifies which approach to use when certain primitives
are interrupted by handling signal signum. If failflag is
false, signal signum restarts primitives. If failflag is
true, handling signum causes these primitives to fail with error
code
EINTR. See section 24.5 Primitives Interrupted by Signals.
