mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-28 13:53:10 +00:00
Adopt the new Rust signal implementation
This switches the signals implementation from C++ to Rust.
This commit is contained in:
ridiculousfish
parent
1ecf9d013d
commit
4771f25102
8 changed files with 97 additions and 455 deletions
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@ -42,6 +42,7 @@ fn main() -> miette::Result<()> {
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"src/parse_tree.rs",
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"src/parse_util.rs",
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"src/redirection.rs",
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"src/signal.rs",
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"src/smoke.rs",
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"src/termsize.rs",
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"src/timer.rs",
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@ -15,10 +15,10 @@ use widestring_suffix::widestrs;
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use crate::builtins::shared::io_streams_t;
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use crate::common::{escape_string, scoped_push, EscapeFlags, EscapeStringStyle, ScopeGuard};
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use crate::ffi::{self, block_t, parser_t, signal_check_cancel, signal_handle, Repin};
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use crate::ffi::{self, block_t, parser_t, Repin};
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use crate::flog::FLOG;
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use crate::job_group::{JobId, MaybeJobId};
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use crate::signal::Signal;
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use crate::signal::{signal_check_cancel, signal_handle, Signal};
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use crate::termsize;
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use crate::wchar::{wstr, WString, L};
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use crate::wchar_ext::ToWString;
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@ -617,7 +617,7 @@ fn event_get_desc_ffi(parser: &parser_t, evt: &Event) -> UniquePtr<CxxWString> {
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/// Add an event handler.
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pub fn add_handler(eh: EventHandler) {
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if let EventType::Signal { signal } = eh.desc.typ {
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signal_handle(ffi::c_int(signal.code()));
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signal_handle(signal);
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inc_signal_observed(signal);
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}
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@ -772,7 +772,7 @@ pub fn fire_delayed(parser: &mut parser_t) {
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return;
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};
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// Do not invoke new event handlers if we are unwinding (#6649).
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if signal_check_cancel().0 != 0 {
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if signal_check_cancel() != 0 {
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return;
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};
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@ -93,15 +93,9 @@ include_cpp! {
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generate!("pretty_printer_t")
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generate!("escape_string")
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generate!("sig2wcs")
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generate!("wcs2sig")
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generate!("signal_get_desc")
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generate!("fd_event_signaller_t")
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generate!("signal_handle")
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generate!("signal_check_cancel")
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generate!("block_t")
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generate!("block_type_t")
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generate!("statuses_t")
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@ -5,12 +5,64 @@ use crate::event::{enqueue_signal, is_signal_observed};
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use crate::termsize::termsize_handle_winch;
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use crate::topic_monitor::{generation_t, invalid_generations, topic_monitor_principal, topic_t};
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use crate::wchar::{wstr, WExt, L};
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use crate::wutil::fish_wcstoi;
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use crate::wutil::{wgettext, wgettext_str, wperror};
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use crate::wchar_ffi::{AsWstr, WCharToFFI};
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use crate::wutil::{fish_wcstoi, wgettext, wgettext_str, wperror};
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use cxx::{CxxWString, UniquePtr};
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use errno::{errno, set_errno};
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use std::sync::atomic::{AtomicI32, Ordering};
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use widestring_suffix::widestrs;
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#[cxx::bridge]
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mod signal_ffi {
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extern "Rust" {
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fn signal_set_handlers(interactive: bool);
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fn signal_set_handlers_once(interactive: bool);
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#[cxx_name = "signal_handle"]
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fn signal_handle_ffi(sig: i32);
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fn signal_unblock_all();
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#[cxx_name = "sig2wcs"]
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fn sig2wcs_ffi(sig: i32) -> UniquePtr<CxxWString>;
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#[cxx_name = "wcs2sig"]
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fn wcs2sig_ffi(sig: &CxxWString) -> i32;
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#[cxx_name = "signal_get_desc"]
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fn signal_get_desc_ffi(sig: i32) -> UniquePtr<CxxWString>;
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fn signal_check_cancel() -> i32;
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fn signal_clear_cancel();
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fn signal_reset_handlers();
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}
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}
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fn sig2wcs_ffi(sig: i32) -> UniquePtr<CxxWString> {
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Signal::new(sig).name().to_ffi()
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}
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fn wcs2sig_ffi(sig: &CxxWString) -> i32 {
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if let Some(sig) = Signal::parse(sig.as_wstr()) {
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sig.code()
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} else {
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-1
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}
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}
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fn signal_get_desc_ffi(sig: i32) -> UniquePtr<CxxWString> {
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Signal::new(sig).desc().to_ffi()
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}
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fn signal_handle_ffi(sig: i32) {
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signal_handle(Signal::new(sig));
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}
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// This is extern "C" for FFI purposes, as this is used after fork().
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#[no_mangle]
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pub extern "C" fn get_signals_with_handlers_ffi(set: *mut libc::sigset_t) {
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get_signals_with_handlers(unsafe { &mut *set });
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}
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/// Store the "main" pid. This allows us to reliably determine if we are in a forked child.
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static MAIN_PID: AtomicI32 = AtomicI32::new(0);
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@ -38,10 +90,15 @@ fn reraise_if_forked_child(sig: i32) -> bool {
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/// Of course this is modified from a signal handler.
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static CANCELLATION_SIGNAL: AtomicI32 = AtomicI32::new(0);
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/// Set the cancellation signal to zero.
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/// In generally this should only be done in interactive sessions.
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pub fn signal_clear_cancel() {
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CANCELLATION_SIGNAL.store(0, Ordering::Relaxed);
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}
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/// \return the most recent cancellation signal received by the fish process.
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/// Currently only SIGINT is considered a cancellation signal.
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/// This is thread safe.
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pub fn signal_check_cancel() -> i32 {
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CANCELLATION_SIGNAL.load(Ordering::Relaxed)
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}
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@ -121,7 +178,8 @@ extern "C" fn fish_signal_handler(
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set_errno(saved_errno);
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}
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fn signal_reset_handlers() {
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/// Set all signal handlers to SIG_DFL.
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pub fn signal_reset_handlers() {
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let mut act: libc::sigaction = unsafe { std::mem::zeroed() };
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unsafe { libc::sigemptyset(&mut act.sa_mask) };
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act.sa_flags = 0;
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@ -190,8 +248,11 @@ fn set_interactive_handlers() {
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sigaction(libc::SIGWINCH, &act, nullptr);
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}
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/// Sets up appropriate signal handlers.
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fn signal_set_handlers(interactive: bool) {
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/// Set signal handlers to fish default handlers.
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pub fn signal_set_handlers(interactive: bool) {
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// Mark our main pid.
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MAIN_PID.store(unsafe { libc::getpid() }, Ordering::Relaxed);
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use libc::SIG_IGN;
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let nullptr = std::ptr::null_mut();
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let mut act: libc::sigaction = unsafe { std::mem::zeroed() };
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@ -238,7 +299,19 @@ fn signal_set_handlers(interactive: bool) {
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}
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}
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pub fn signal_handle(sig: libc::c_int) {
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pub fn signal_set_handlers_once(interactive: bool) {
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static NONINTER_ONCE: std::sync::Once = std::sync::Once::new();
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NONINTER_ONCE.call_once(|| signal_set_handlers(false));
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static INTER_ONCE: std::sync::Once = std::sync::Once::new();
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if interactive {
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INTER_ONCE.call_once(set_interactive_handlers);
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}
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}
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/// Mark that a signal is being handled.
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pub fn signal_handle(sig: Signal) {
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let sig = sig.code();
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let mut act: libc::sigaction = unsafe { std::mem::zeroed() };
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// These should always be handled.
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@ -443,7 +516,8 @@ impl Signal {
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.find(|entry| entry.signal == self.code())
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}
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// Previously sig2wcs().
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/// Get string representation of a signal.
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/// Previously sig2wcs().
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pub fn name(&self) -> &'static wstr {
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match self.get_lookup_entry() {
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Some(entry) => entry.name,
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@ -451,7 +525,8 @@ impl Signal {
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}
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}
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// Previously signal_get_desc().
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/// Returns a description of the specified signal.
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/// Previously signal_get_desc().
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pub fn desc(&self) -> &'static wstr {
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match self.get_lookup_entry() {
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Some(entry) => wgettext_str(entry.desc),
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@ -360,7 +360,7 @@ wcstring function_properties_t::annotated_definition(const wcstring &name) const
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for (const auto &d : handlers) {
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switch (d.typ) {
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case event_type_t::signal: {
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append_format(out, L" --on-signal %ls", sig2wcs(d.signal));
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append_format(out, L" --on-signal %ls", sig2wcs(d.signal)->c_str());
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break;
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}
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case event_type_t::variable: {
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@ -581,10 +581,10 @@ wcstring summary_command(const job_ref_t &j, const process_ptr_t &p = nullptr) {
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// Arguments are the signal name and description.
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int sig = p->status.signal_code();
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buffer.push_back(L' ');
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buffer.append(escape_string(sig2wcs(sig)));
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buffer.append(escape_string(std::move(*sig2wcs(sig))));
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buffer.push_back(L' ');
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buffer.append(escape_string(signal_get_desc(sig)));
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buffer.append(escape_string(std::move(*signal_get_desc(sig))));
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// If we have multiple processes, we also append the pid and argv.
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if (j->processes.size() > 1) {
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403
src/signals.cpp
403
src/signals.cpp
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@ -21,407 +21,10 @@
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#include "topic_monitor.h"
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#include "wutil.h" // IWYU pragma: keep
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/// Struct describing an entry for the lookup table used to convert between signal names and signal
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/// ids, etc.
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struct lookup_entry {
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/// Signal id.
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int signal;
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/// Signal name.
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const wchar_t *name;
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/// Signal description.
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const wchar_t *desc;
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};
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/// Lookup table used to convert between signal names and signal ids, etc.
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static const struct lookup_entry signal_table[] = {
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#ifdef SIGHUP
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{SIGHUP, L"SIGHUP", N_(L"Terminal hung up")},
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#endif
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#ifdef SIGINT
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{SIGINT, L"SIGINT", N_(L"Quit request from job control (^C)")},
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#endif
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#ifdef SIGQUIT
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{SIGQUIT, L"SIGQUIT", N_(L"Quit request from job control with core dump (^\\)")},
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#endif
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#ifdef SIGILL
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{SIGILL, L"SIGILL", N_(L"Illegal instruction")},
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#endif
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#ifdef SIGTRAP
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{SIGTRAP, L"SIGTRAP", N_(L"Trace or breakpoint trap")},
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#endif
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#ifdef SIGABRT
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{SIGABRT, L"SIGABRT", N_(L"Abort")},
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#endif
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#ifdef SIGBUS
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{SIGBUS, L"SIGBUS", N_(L"Misaligned address error")},
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#endif
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#ifdef SIGFPE
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{SIGFPE, L"SIGFPE", N_(L"Floating point exception")},
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#endif
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#ifdef SIGKILL
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{SIGKILL, L"SIGKILL", N_(L"Forced quit")},
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#endif
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#ifdef SIGUSR1
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{SIGUSR1, L"SIGUSR1", N_(L"User defined signal 1")},
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#endif
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#ifdef SIGUSR2
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{SIGUSR2, L"SIGUSR2", N_(L"User defined signal 2")},
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#endif
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#ifdef SIGSEGV
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{SIGSEGV, L"SIGSEGV", N_(L"Address boundary error")},
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#endif
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#ifdef SIGPIPE
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{SIGPIPE, L"SIGPIPE", N_(L"Broken pipe")},
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#endif
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#ifdef SIGALRM
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{SIGALRM, L"SIGALRM", N_(L"Timer expired")},
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#endif
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#ifdef SIGTERM
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{SIGTERM, L"SIGTERM", N_(L"Polite quit request")},
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#endif
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#ifdef SIGCHLD
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{SIGCHLD, L"SIGCHLD", N_(L"Child process status changed")},
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#endif
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#ifdef SIGCONT
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{SIGCONT, L"SIGCONT", N_(L"Continue previously stopped process")},
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#endif
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#ifdef SIGSTOP
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{SIGSTOP, L"SIGSTOP", N_(L"Forced stop")},
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#endif
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#ifdef SIGTSTP
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{SIGTSTP, L"SIGTSTP", N_(L"Stop request from job control (^Z)")},
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#endif
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#ifdef SIGTTIN
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{SIGTTIN, L"SIGTTIN", N_(L"Stop from terminal input")},
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#endif
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#ifdef SIGTTOU
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{SIGTTOU, L"SIGTTOU", N_(L"Stop from terminal output")},
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#endif
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#ifdef SIGURG
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{SIGURG, L"SIGURG", N_(L"Urgent socket condition")},
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#endif
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#ifdef SIGXCPU
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{SIGXCPU, L"SIGXCPU", N_(L"CPU time limit exceeded")},
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#endif
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#ifdef SIGXFSZ
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{SIGXFSZ, L"SIGXFSZ", N_(L"File size limit exceeded")},
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#endif
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#ifdef SIGVTALRM
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{SIGVTALRM, L"SIGVTALRM", N_(L"Virtual timer expired")},
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#endif
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#ifdef SIGPROF
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{SIGPROF, L"SIGPROF", N_(L"Profiling timer expired")},
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#endif
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#ifdef SIGWINCH
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{SIGWINCH, L"SIGWINCH", N_(L"Window size change")},
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#endif
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#ifdef SIGWIND
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{SIGWIND, L"SIGWIND", N_(L"Window size change")},
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#endif
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#ifdef SIGIO
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{SIGIO, L"SIGIO", N_(L"I/O on asynchronous file descriptor is possible")},
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#endif
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#ifdef SIGPWR
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{SIGPWR, L"SIGPWR", N_(L"Power failure")},
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#endif
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#ifdef SIGSYS
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{SIGSYS, L"SIGSYS", N_(L"Bad system call")},
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#endif
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#ifdef SIGINFO
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{SIGINFO, L"SIGINFO", N_(L"Information request")},
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#endif
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#ifdef SIGSTKFLT
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{SIGSTKFLT, L"SISTKFLT", N_(L"Stack fault")},
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#endif
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#ifdef SIGEMT
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{SIGEMT, L"SIGEMT", N_(L"Emulator trap")},
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#endif
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#ifdef SIGIOT
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{SIGIOT, L"SIGIOT", N_(L"Abort (Alias for SIGABRT)")},
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#endif
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#ifdef SIGUNUSED
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{SIGUNUSED, L"SIGUNUSED", N_(L"Unused signal")},
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#endif
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};
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/// Test if \c name is a string describing the signal named \c canonical.
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static int match_signal_name(const wchar_t *canonical, const wchar_t *name) {
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if (wcsncasecmp(name, L"sig", const_strlen("sig")) == 0) name += 3;
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return wcscasecmp(canonical + const_strlen("sig"), name) == 0;
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}
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int wcs2sig(const wchar_t *str) {
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for (const auto &data : signal_table) {
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if (match_signal_name(data.name, str)) {
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return data.signal;
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}
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}
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int res = fish_wcstoi(str);
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if (errno || res < 0) return -1;
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return res;
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}
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const wchar_t *sig2wcs(int sig) {
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for (const auto &data : signal_table) {
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if (data.signal == sig) {
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return data.name;
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}
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}
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return _(L"Unknown");
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}
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const wchar_t *signal_get_desc(int sig) {
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for (const auto &data : signal_table) {
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if (data.signal == sig) {
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return _(data.desc);
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}
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}
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return _(L"Unknown");
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}
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/// Store the "main" pid. This allows us to reliably determine if we are in a forked child.
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static const pid_t s_main_pid = getpid();
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/// It's possible that we receive a signal after we have forked, but before we have reset the signal
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/// handlers (or even run the pthread_atfork calls). In that event we will do something dumb like
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/// swallow SIGINT. Ensure that doesn't happen. Check if we are the main fish process; if not, reset
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/// and re-raise the signal. \return whether we re-raised the signal.
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static bool reraise_if_forked_child(int sig) {
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// Don't use is_forked_child: it relies on atfork handlers which may have not yet run.
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if (getpid() == s_main_pid) {
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return false;
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}
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signal(sig, SIG_DFL);
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raise(sig);
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return true;
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}
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/// The cancellation signal we have received.
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/// Of course this is modified from a signal handler.
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static volatile relaxed_atomic_t<sig_atomic_t> s_cancellation_signal{0};
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void signal_clear_cancel() { s_cancellation_signal = 0; }
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int signal_check_cancel() { return s_cancellation_signal; }
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/// The single signal handler. By centralizing signal handling we ensure that we can never install
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/// the "wrong" signal handler (see #5969).
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static void fish_signal_handler(int sig, siginfo_t *info, void *context) {
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UNUSED(info);
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UNUSED(context);
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// Ensure we preserve errno.
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const int saved_errno = errno;
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// Check if we are a forked child.
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if (reraise_if_forked_child(sig)) {
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errno = saved_errno;
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return;
|
||||
}
|
||||
|
||||
// Check if fish script cares about this.
|
||||
const bool observed = event_is_signal_observed(sig);
|
||||
if (observed) {
|
||||
event_enqueue_signal(sig);
|
||||
}
|
||||
|
||||
// Do some signal-specific stuff.
|
||||
switch (sig) {
|
||||
#ifdef SIGWINCH
|
||||
case SIGWINCH:
|
||||
// Respond to a winch signal by telling the termsize container.
|
||||
termsize_handle_winch();
|
||||
break;
|
||||
#endif
|
||||
|
||||
case SIGHUP:
|
||||
// Exit unless the signal was trapped.
|
||||
if (!observed) {
|
||||
reader_sighup();
|
||||
}
|
||||
topic_monitor_principal().post(topic_t::sighupint);
|
||||
break;
|
||||
|
||||
case SIGTERM:
|
||||
// Handle sigterm. The only thing we do is restore the front process ID, then die.
|
||||
if (!observed) {
|
||||
restore_term_foreground_process_group_for_exit();
|
||||
signal(SIGTERM, SIG_DFL);
|
||||
raise(SIGTERM);
|
||||
}
|
||||
break;
|
||||
|
||||
case SIGINT:
|
||||
// Cancel unless the signal was trapped.
|
||||
if (!observed) {
|
||||
s_cancellation_signal = SIGINT;
|
||||
}
|
||||
reader_handle_sigint();
|
||||
topic_monitor_principal().post(topic_t::sighupint);
|
||||
break;
|
||||
|
||||
case SIGCHLD:
|
||||
// A child process stopped or exited.
|
||||
topic_monitor_principal().post(topic_t::sigchld);
|
||||
break;
|
||||
|
||||
case SIGALRM:
|
||||
// We have a sigalarm handler that does nothing. This is used in the signal torture
|
||||
// test, to verify that we behave correctly when receiving lots of irrelevant signals.
|
||||
break;
|
||||
}
|
||||
errno = saved_errno;
|
||||
}
|
||||
|
||||
void signal_reset_handlers() {
|
||||
struct sigaction act;
|
||||
sigemptyset(&act.sa_mask);
|
||||
act.sa_flags = 0;
|
||||
act.sa_handler = SIG_DFL;
|
||||
|
||||
for (const auto &data : signal_table) {
|
||||
if (data.signal == SIGHUP) {
|
||||
struct sigaction oact;
|
||||
sigaction(SIGHUP, nullptr, &oact);
|
||||
if (oact.sa_handler == SIG_IGN) continue;
|
||||
}
|
||||
sigaction(data.signal, &act, nullptr);
|
||||
}
|
||||
}
|
||||
|
||||
static void set_interactive_handlers() {
|
||||
struct sigaction act, oact;
|
||||
act.sa_flags = 0;
|
||||
oact.sa_flags = 0;
|
||||
sigemptyset(&act.sa_mask);
|
||||
|
||||
// Interactive mode. Ignore interactive signals. We are a shell, we know what is best for
|
||||
// the user.
|
||||
act.sa_handler = SIG_IGN;
|
||||
sigaction(SIGTSTP, &act, nullptr);
|
||||
sigaction(SIGTTOU, &act, nullptr);
|
||||
|
||||
// We don't ignore SIGTTIN because we might send it to ourself.
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGTTIN, &act, nullptr);
|
||||
|
||||
// SIGTERM restores the terminal controlling process before dying.
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGTERM, &act, nullptr);
|
||||
|
||||
sigaction(SIGHUP, nullptr, &oact);
|
||||
if (oact.sa_handler == SIG_DFL) {
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGHUP, &act, nullptr);
|
||||
}
|
||||
|
||||
// SIGALARM as part of our signal torture test
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGALRM, &act, nullptr);
|
||||
|
||||
#ifdef SIGWINCH
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGWINCH, &act, nullptr);
|
||||
#endif
|
||||
}
|
||||
|
||||
/// Sets up appropriate signal handlers.
|
||||
void signal_set_handlers(bool interactive) {
|
||||
struct sigaction act;
|
||||
act.sa_flags = 0;
|
||||
sigemptyset(&act.sa_mask);
|
||||
|
||||
// Ignore SIGPIPE. We'll detect failed writes and deal with them appropriately. We don't want
|
||||
// this signal interrupting other syscalls or terminating us.
|
||||
act.sa_sigaction = nullptr;
|
||||
act.sa_handler = SIG_IGN;
|
||||
sigaction(SIGPIPE, &act, nullptr);
|
||||
|
||||
// Ignore SIGQUIT.
|
||||
act.sa_handler = SIG_IGN;
|
||||
sigaction(SIGQUIT, &act, nullptr);
|
||||
|
||||
// Apply our SIGINT handler.
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
sigaction(SIGINT, &act, nullptr);
|
||||
|
||||
// Whether or not we're interactive we want SIGCHLD to not interrupt restartable syscalls.
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
act.sa_flags = SA_SIGINFO | SA_RESTART;
|
||||
if (sigaction(SIGCHLD, &act, nullptr)) {
|
||||
wperror(L"sigaction");
|
||||
FATAL_EXIT();
|
||||
}
|
||||
|
||||
if (interactive) {
|
||||
set_interactive_handlers();
|
||||
}
|
||||
|
||||
#ifdef FISH_TSAN_WORKAROUNDS
|
||||
// Work around the following TSAN bug:
|
||||
// The structure containing signal information for a thread is lazily allocated by TSAN.
|
||||
// It is possible for the same thread to receive two allocations, if the signal handler
|
||||
// races with other allocation paths (e.g. a blocking call). This results in the first signal
|
||||
// being potentially dropped.
|
||||
// The workaround is to send ourselves a SIGCHLD signal now, to force the allocation to happen.
|
||||
// As no child is associated with this signal, it is OK if it is dropped, so long as the
|
||||
// allocation happens.
|
||||
(void)kill(getpid(), SIGCHLD);
|
||||
#endif
|
||||
}
|
||||
|
||||
void signal_set_handlers_once(bool interactive) {
|
||||
static std::once_flag s_noninter_once;
|
||||
std::call_once(s_noninter_once, signal_set_handlers, false);
|
||||
|
||||
static std::once_flag s_inter_once;
|
||||
if (interactive) std::call_once(s_inter_once, set_interactive_handlers);
|
||||
}
|
||||
|
||||
void signal_handle(int sig) {
|
||||
struct sigaction act;
|
||||
|
||||
// These should always be handled.
|
||||
if ((sig == SIGINT) || (sig == SIGQUIT) || (sig == SIGTSTP) || (sig == SIGTTIN) ||
|
||||
(sig == SIGTTOU) || (sig == SIGCHLD))
|
||||
return;
|
||||
|
||||
act.sa_flags = 0;
|
||||
sigemptyset(&act.sa_mask);
|
||||
act.sa_flags = SA_SIGINFO;
|
||||
act.sa_sigaction = &fish_signal_handler;
|
||||
sigaction(sig, &act, nullptr);
|
||||
}
|
||||
|
||||
void get_signals_with_handlers(sigset_t *set) {
|
||||
sigemptyset(set);
|
||||
for (const auto &data : signal_table) {
|
||||
struct sigaction act = {};
|
||||
sigaction(data.signal, nullptr, &act);
|
||||
// If SIGHUP is being ignored (e.g., because were were run via `nohup`) don't reset it.
|
||||
// We don't special case other signals because if they're being ignored that shouldn't
|
||||
// affect processes we spawn. They should get the default behavior for those signals.
|
||||
if (data.signal == SIGHUP && act.sa_handler == SIG_IGN) continue;
|
||||
if (act.sa_handler != SIG_DFL) sigaddset(set, data.signal);
|
||||
}
|
||||
}
|
||||
|
||||
/// Ensure we did not inherit any blocked signals. See issue #3964.
|
||||
void signal_unblock_all() {
|
||||
sigset_t iset;
|
||||
sigemptyset(&iset);
|
||||
sigprocmask(SIG_SETMASK, &iset, nullptr);
|
||||
extern "C" {
|
||||
void get_signals_with_handlers_ffi(sigset_t *set);
|
||||
}
|
||||
void get_signals_with_handlers(sigset_t *set) { get_signals_with_handlers_ffi(set); }
|
||||
|
||||
sigchecker_t::sigchecker_t(topic_t signal) : topic_(signal) {
|
||||
// Call check() to update our generation.
|
||||
|
|
|
|||
|
|
@ -5,44 +5,13 @@
|
|||
#include <csignal>
|
||||
#include <cstdint>
|
||||
|
||||
/// Get the integer signal value representing the specified signal, or -1 of no signal was found.
|
||||
int wcs2sig(const wchar_t *str);
|
||||
|
||||
/// Get string representation of a signal.
|
||||
const wchar_t *sig2wcs(int sig);
|
||||
|
||||
/// Returns a description of the specified signal.
|
||||
const wchar_t *signal_get_desc(int sig);
|
||||
|
||||
/// Set all signal handlers to SIG_DFL.
|
||||
void signal_reset_handlers();
|
||||
|
||||
/// Set signal handlers to fish default handlers.
|
||||
void signal_set_handlers(bool interactive);
|
||||
|
||||
/// Latch function. This sets signal handlers, but only the first time it is called.
|
||||
void signal_set_handlers_once(bool interactive);
|
||||
|
||||
/// Tell fish what to do on the specified signal.
|
||||
///
|
||||
/// \param sig The signal to specify the action of
|
||||
void signal_handle(int sig);
|
||||
|
||||
/// Ensure we did not inherit any blocked signals. See issue #3964.
|
||||
void signal_unblock_all();
|
||||
#if INCLUDE_RUST_HEADERS
|
||||
#include "signal.rs.h"
|
||||
#endif
|
||||
|
||||
/// Returns signals with non-default handlers.
|
||||
void get_signals_with_handlers(sigset_t *set);
|
||||
|
||||
/// \return the most recent cancellation signal received by the fish process.
|
||||
/// Currently only SIGINT is considered a cancellation signal.
|
||||
/// This is thread safe.
|
||||
int signal_check_cancel();
|
||||
|
||||
/// Set the cancellation signal to zero.
|
||||
/// In generally this should only be done in interactive sessions.
|
||||
void signal_clear_cancel();
|
||||
|
||||
enum class topic_t : uint8_t;
|
||||
/// A sigint_detector_t can be used to check if a SIGINT (or SIGHUP) has been delivered.
|
||||
class sigchecker_t {
|
||||
|
|
|
|||
Loading…
Reference in a new issue