Add tests from the old svn tree

We're losing the svn history (which we could probably keep if we tried
hard enough) but don't consider that worthwhile.

Note these tests are destructive, so run them only in a throwaway
environment like a chroot, container, or vm.

The tests/run.all script should be the one which launches all the tests.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

tests/su/02/env_special-options_-l-p.exp

@@ -0,0 +1,55 @@
+#!/usr/bin/expect
+
+if {$argc == 1} {
+	set command     [lindex $argv 0]
+} else {
+	set command     ""
+}
+
+
+set timeout 2
+expect_after default {puts "\nFAIL"; exit 1}
+
+spawn /bin/bash
+expect "# "
+
+send "id\r"
+expect "uid=0(root) gid=0(root) groups=0(root)\r"
+expect "# "
+
+send "export PATH=bar:\$PATH\r"
+expect "# "
+send "echo \"PATH=\\\"\$PATH\\\"\"\r"
+expect "# "
+
+#=============================================================================
+#
+# su -m -l, make a login shell, but preserve environment
+# However, PATH is not preserved, but set to what it would be with login
+#
+#=============================================================================
+send "/bin/su -p $command -l myuser\r"
+expect "$ "
+
+send "id\n"
+expect "uid=424242(myuser) gid=424242(myuser) groups=424242(myuser)\r"
+expect "$ "
+
+send_user "\n# Even with -p, PATH is reset"
+send "\r"
+expect "$ "
+
+send "echo \"PATH=\\\"\$PATH\\\"\"\r"
+expect "PATH=\"/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games\"\r"
+expect "$ "
+
+send "echo \"'\$HOME'\$USER'\$LOGNAME'\$SHELL'\"\r"
+expect "'/root'root'root'/bin/bash'\r"
+expect "$ "
+
+send "exit\r"
+expect "# "
+
+puts "\nPASS"
+exit 0
+