test: namespace cleanup, common -> src, tenv -> lib, etc.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/lib/exec.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+# Execute a given command from within the test environment.
+#
+# Copyright (c) 2021  Jacques de Laval <jacques@de-laval.se>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+set -eu
+
+if [ "$#" -lt 2 ]; then
+	echo "Usage:"
+	echo "  $0 [target-pid] [command [arguments]]"
+	exit 1
+fi
+target="$1"
+shift
+
+TEST_DIR=$(dirname "$0"../)
+SYSROOT="${SYSROOT:-$(pwd)/${TEST_DIR}/sysroot}"
+
+nsenter=$(command -v nsenter)
+chroot=$(command -v chroot)
+
+export PS1='\w \$ '
+export PS2='> '
+export PS3='#? '
+export PS4='+ '
+
+PATH="$TESTENV_PATH"
+export PATH
+
+"$nsenter"					\
+	--preserve-credentials			\
+	--user					\
+	--mount					\
+	--uts					\
+	--ipc					\
+	--net					\
+	--pid					\
+	-w -t "$target"				\
+	"$chroot" "$SYSROOT" "$@"