term.ui: use os.signal_opt instead of os.signal

vlib/os/signal.c.v

@@ -2,38 +2,44 @@ module os
 
 #include <signal.h>
 
+// os.Signal - enumerate possible POSIX signals and
+// their integer codes.
+// NB: the integer codes are given here explicitly,
+// to make it easier to lookup, without needing to
+// consult man pages / signal.h .
+
 pub enum Signal {
 	hup = 1
-	int
-	quit
-	ill
-	trap
-	abrt
-	bus
-	fpe
-	kill
-	usr1
-	segv
-	usr2
-	pipe
-	alrm
-	term
-	stkflt
-	chld
-	cont
-	stop
-	tstp
-	ttin
-	ttou
-	urg
-	xcpu
-	xfsz
-	vtalrm
-	prof
-	winch
-	poll
-	pwr
-	sys
+	int = 2
+	quit = 3
+	ill = 4
+	trap = 5
+	abrt = 6
+	bus = 7
+	fpe = 8
+	kill = 9
+	usr1 = 10
+	segv = 11
+	usr2 = 12
+	pipe = 13
+	alrm = 14
+	term = 15
+	stkflt = 16
+	chld = 17
+	cont = 18
+	stop = 19
+	tstp = 20
+	ttin = 21
+	ttou = 22
+	urg = 23
+	xcpu = 24
+	xfsz = 25
+	vtalrm = 26
+	prof = 27
+	winch = 28
+	poll = 29
+	pwr = 30
+	sys = 31
 }
 
 type SignalHandler = fn (Signal)

vlib/term/ui/consoleapi_windows.c.v

@@ -1,7 +1,5 @@
 module ui
 
-import os
-
 union C.Event {
 	KeyEvent              C.KEY_EVENT_RECORD
 	MouseEvent            C.MOUSE_EVENT_RECORD

vlib/term/ui/input.v

@@ -3,6 +3,8 @@
 // that can be found in the LICENSE file.
 module ui
 
+import os
+
 pub enum KeyCode {
 	null                 = 0
 	tab                  = 9
@@ -208,8 +210,8 @@ pub struct Config {
 	capture_events       bool
 	use_alternate_buffer bool = true
 	skip_init_checks     bool
-	// All kill signals to set up exit listeners on
-	reset                []int = [1, 2, 3, 4, 6, 7, 8, 9, 11, 13, 14, 15, 19]
+	// All kill signals to set up exit listeners on:
+	reset []os.Signal = [.hup, .int, .quit, .ill, .abrt, .bus, .fpe, .kill, .segv, .pipe, .alrm, .term, .stop]
 }
 
 [inline]

vlib/term/ui/input_windows.c.v

@@ -82,13 +82,13 @@ pub fn init(cfg Config) &Context {
 	}
 	C.atexit(restore_terminal_state)
 	for code in ctx.cfg.reset {
-		os.signal(code, fn () {
+		os.signal_opt(code, fn (_ os.Signal) {
 			mut c := ui.ctx_ptr
 			if c != 0 {
 				c.cleanup()
 			}
 			exit(0)
-		})
+		}) or {}
 	}
 
 	ctx.stdin_handle = stdin_handle

vlib/term/ui/termios_nix.c.v

@@ -46,6 +46,10 @@ fn get_terminal_size() (u16, u16) {
 	return winsz.ws_row, winsz.ws_col
 }
 
+fn restore_terminal_state_signal(_ os.Signal) {
+	restore_terminal_state()
+}
+
 fn restore_terminal_state() {
 	termios_reset()
 	mut c := ctx_ptr
@@ -123,8 +127,8 @@ fn (mut ctx Context) termios_setup() ? {
 
 	// Reset console on exit
 	C.atexit(restore_terminal_state)
-	os.signal(C.SIGTSTP, restore_terminal_state)
-	os.signal(C.SIGCONT, fn () {
+	os.signal_opt(.tstp, restore_terminal_state_signal) or {}
+	os.signal_opt(.cont, fn (_ os.Signal) {
 		mut c := ctx_ptr
 		if c != 0 {
 			c.termios_setup() or { panic(err) }
@@ -137,18 +141,18 @@ fn (mut ctx Context) termios_setup() ? {
 			c.paused = false
 			c.event(event)
 		}
-	})
+	}) or {}
 	for code in ctx.cfg.reset {
-		os.signal(code, fn () {
+		os.signal_opt(code, fn (_ os.Signal) {
 			mut c := ctx_ptr
 			if c != 0 {
 				c.cleanup()
 			}
 			exit(0)
-		})
+		}) or {}
 	}
 
-	os.signal(C.SIGWINCH, fn () {
+	os.signal_opt(.winch, fn (_ os.Signal) {
 		mut c := ctx_ptr
 		if c != 0 {
 			c.window_height, c.window_width = get_terminal_size()
@@ -160,7 +164,7 @@ fn (mut ctx Context) termios_setup() ? {
 			}
 			c.event(event)
 		}
-	})
+	}) or {}
 
 	os.flush()
 }