Function query_signal_disposition

pub fn query_signal_disposition(signum: c_int) -> Result<SignalDisposition>

Query the current disposition of a signal (signum).

This inspects the kernel’s sigaction state for the given signal without changing it (by passing act = NULL).

Returns:

• SignalDisposition::Ignored if the handler is SIG_IGN
• SignalDisposition::Default if the handler is SIG_DFL
• SignalDisposition::Custom if a user-installed handler is present

Errors

Returns an io::Error if the underlying sigaction call fails, for example if signum is invalid.