crewlink: update launcher

Fix two issues with the crewlink launcher. First, ensure that the sysctl
command to restore the old value runs. Next, add a hack since CrewLink
leaks processes.

3 files changed, 37 insertions, 6 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 28446f32287a..34d711c5629d 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = crewlink
 	pkgdesc = Free, open, Among Us Proximity Chat
 	pkgver = 1.1.6
-	pkgrel = 1
+	pkgrel = 2
 	url = https://github.com/zbanks/CrewLink
 	arch = x86_64
 	license = GPL3
@@ -9,7 +9,7 @@ pkgbase = crewlink
 	source = https://github.com/zbanks/CrewLink/archive/v1.1.6-linux.tar.gz
 	source = crewlink
 	sha256sums = df424481df5a473e9abfd1ca47bd6f2cc79ab275726757097574d26f46723f87
-	sha256sums = 80a5eb8b16ef5b92e164bc281cfd1bf5b7f9ff3996dd3122dae67f5356c97531
+	sha256sums = d94f1847d9e7909de929dc7579cd2ab934872f20faee9822b4abc85c0b0afcc1
 
 pkgname = crewlink
 
diff --git a/PKGBUILD b/PKGBUILD
index 2d352a979f06..56edf3bf57de 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: Denton Liu <liu.denton@gmail.com>
 pkgname=crewlink
 pkgver=1.1.6
-pkgrel=1
+pkgrel=2
 pkgdesc='Free, open, Among Us Proximity Chat'
 arch=('x86_64')
 url='https://github.com/zbanks/CrewLink'
@@ -10,7 +10,7 @@ makedepends=('yarn')
 source=("https://github.com/zbanks/CrewLink/archive/v$pkgver-linux.tar.gz"
         crewlink)
 sha256sums=('df424481df5a473e9abfd1ca47bd6f2cc79ab275726757097574d26f46723f87'
-            '80a5eb8b16ef5b92e164bc281cfd1bf5b7f9ff3996dd3122dae67f5356c97531')
+            'd94f1847d9e7909de929dc7579cd2ab934872f20faee9822b4abc85c0b0afcc1')
 
 build() {
 	cd "$srcdir/CrewLink-$pkgver-linux"
diff --git a/crewlink b/crewlink
index 2afc6ff09b61..d91a191d3a27 100755
--- a/crewlink
+++ b/crewlink
@@ -5,9 +5,40 @@ error () {
 	exit 1
 }
 
+process_tree () {
+	children=$(cat /proc/"$1"/task/*/children)
+	echo "$1"
+	for p in $children
+	do
+		process_tree "$p"
+	done
+}
+
 key='kernel.yama.ptrace_scope'
 old_value=$(sysctl -n "$key")
 
 sysctl "$key=0" || error "unable to run 'sysctl $key=0' (did you run this as root?)"
-su "$(logname)" -c '/opt/CrewLink/crewlink'
-sysctl "$key=$old_value" || error "unable to run 'sysctl $key=$old_value'"
+trap 'sysctl "$key=$old_value"' EXIT
+trap 'exit' INT
+
+su "$(logname)" -c /opt/CrewLink/crewlink &
+
+cl_pid="$!"
+max_procs=0
+
+# This is a dirty, dirty hack. This is required because closing the window
+# doesn't result in the process tree dying. Some zygote processes are left
+# behind. Instead of letting crewlink clean up after itself, detect when some
+# processes have died and just kill off the rest.
+while true
+do
+	sleep 1
+	cur_procs=$(process_tree "$cl_pid" | wc -l)
+	if test "$(( max_procs - 1 > cur_procs ))" = 1
+	then
+		break
+	fi
+	max_procs="$cur_procs"
+done
+kill "$cl_pid"
+wait