build: remove generated artifacts and unsafe scripts

bench.sh

@@ -1,23 +1,43 @@
 #!/bin/sh
 
-pkill strans
-pkill strans-xim
-sleep 1
+set -eu
+
+cd "$(dirname "$0")"
+
+strans_pid=
+perf_pid=
+
+cleanup()
+{
+	trap - 0 1 2 15
+	if test -n "$perf_pid"; then
+		kill -INT "$perf_pid" 2>/dev/null || true
+		wait "$perf_pid" 2>/dev/null || true
+	fi
+	if test -n "$strans_pid"; then
+		kill "$strans_pid" 2>/dev/null || true
+		wait "$strans_pid" 2>/dev/null || true
+	fi
+}
+
+trap cleanup 0 1 2 15
 
 ./strans map font &
+strans_pid=$!
 sleep 1
+kill -0 "$strans_pid"
 
 # warm up glyph cache
 ./bench/bench bench/bench.keys 100
 echo "cache warmed up"
 
-STRANS_PID=$(pgrep -x strans)
-perf record -g -o bench/perf.data -p "$STRANS_PID" &
-PERF_PID=$!
+perf record -g -o bench/perf.data -p "$strans_pid" &
+perf_pid=$!
 sleep 1
+kill -0 "$perf_pid"
 
 ./bench/bench bench/bench.keys 100
 
-kill -INT $PERF_PID
-wait $PERF_PID 2>/dev/null
-pkill strans
+kill -INT "$perf_pid"
+wait "$perf_pid" 2>/dev/null || true
+perf_pid=