diff --git a/regar.ts b/regar.ts
index 74a0ff0..d30b5c4 100755
--- a/regar.ts
+++ b/regar.ts
@@ -2,7 +2,7 @@
 
 import { exists } from "https://deno.land/std@0.224.0/fs/exists.ts";
 import { Command } from "https://deno.land/x/cliffy@v1.0.0-rc.4/command/mod.ts";
-import { Channel } from "https://git.barnulf.net/mb/barnulf_ts/raw/branch/master/mod.ts";
+import { Channel, Constructible, InstanceOf } from "https://git.barnulf.net/mb/barnulf_ts/raw/branch/master/mod.ts";
 
 async function main() {
 	const { do_clear, command, extensions, files, strategy } = await parse_args();
@@ -121,7 +121,7 @@ class WaitStrategy implements ShutdownStrategy {
 
 class SoftStrategy implements ShutdownStrategy {
 	async shutdown(process_: Deno.ChildProcess) {
-		Deno.kill(process_.pid, "SIGINT");
+		try_signal(process_.pid, "SIGINT");
 		await process_.output();
 		return true;
 	}
@@ -129,7 +129,7 @@ class SoftStrategy implements ShutdownStrategy {
 
 class HardStrategy implements ShutdownStrategy {
 	async shutdown(process_: Deno.ChildProcess) {
-		Deno.kill(process_.pid, "SIGKILL");
+		try_signal(process_.pid, "SIGKILL");
 		return await true;
 	}
 }
@@ -145,6 +145,32 @@ async function process_exists(pid: number) {
 	return await exists(`/proc/${pid}`);
 }
 
+function try_signal(pid: number, sig: Deno.Signal) {
+	catch_(
+		() => Deno.kill(pid, sig),
+		[Deno.errors.NotFound, "ignore"],
+	);
+}
+
+// deno-lint-ignore no-explicit-any
+type Catching<C extends Constructible<C, any>, R = void> = [
+	exception: C,
+	strategy: ((exc: InstanceOf<C>) => R) | "ignore",
+];
+
+// deno-lint-ignore no-explicit-any
+function catch_<T, R, Cs extends Catching<any, R>[]>(op: () => T, ...catchings: Cs) {
+	try {
+		return op();
+	} catch (exception) {
+		for (const [kind, strategy] of catchings) {
+			if (!(exception instanceof kind)) continue;
+			if (strategy === "ignore") return;
+			return strategy(exception);
+		}
+	}
+}
+
 function log(verb: string, value: unknown) {
 	const yellow = "\x1b[0;33m";
 	const bold = "\x1b[1m";