Recover transient camera failures within six timeout windows

tests/run_camera_timeout.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -euo pipefail
+root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+test_dir="$(mktemp -d)"
+trap 'rm -rf "$test_dir"' EXIT
+flags=(-std=c++17 -O1 -g -Wall -Wextra -Wpedantic -pthread -fsanitize=undefined -fno-sanitize-recover=all -I"$root/include")
+links=()
+if [[ -f "$root/include/v4l2_capture.h" ]]; then
+  flags+=(-DTEST_V4L2_CAPTURE -I"$root/tests/stubs")
+else
+  for fn in open close ioctl mmap munmap poll __poll_chk; do links+=("-Wl,--wrap=$fn"); done
+fi
+"${CXX:-g++}" "${flags[@]}" "${CAMERA_SOURCE:-$root/src/camera.cpp}" "$root/tests/camera_timeout_test.cpp" "${links[@]}" -o "$test_dir/camera_timeout_test"
+"$test_dir/camera_timeout_test" "$@"