Add a sshd debug wrapper to run all of the subprograms from the build

directory while developing and debugging.  Should help prevent accidentally
testing against unchanged installed sshd-auth and sshd-session binaries.
ok djm@

diff --git a/usr.bin/ssh/sshd-debug.sh b/usr.bin/ssh/sshd-debug.sh
new file mode 100755 (executable)
index 0000000..6e290bc
--- /dev/null
+++ b/usr.bin/ssh/sshd-debug.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# ssh-debug
+
+# A wrapper script around sshd to invoke when debugging to debug the
+#  work-in-progress versions of sshd-auth and sshd-session, instead
+# of debugging the installed ones that probably don't have the change
+# you are working on.
+#
+#      Placed in the Public Domain.
+
+unset DIR SSHD SSHD_AUTH SSHD_SESSION
+
+fatal() {
+       echo >&2 $@
+       exit 1
+}
+
+case "$0" in
+/*)                    DIR="`dirname $0`"      ;;
+./sshd-debug.sh)       DIR="`pwd`"             ;;
+*)                     echo "Need full path or working directory."; exit 1 ;;
+esac
+
+for i in sshd/obj/sshd sshd/sshd sshd; do
+       if [ -f "${DIR}/$i" ] && [ -x "${DIR}/$i" ]; then
+               SSHD="${DIR}/$i"
+       fi
+done
+[ -z "${SSHD}" ] && fatal "Could not find sshd"
+
+for i in sshd-auth/obj/sshd-auth sshd-auth/sshd-auth sshd-auth; do
+       if [ -f "${DIR}/$i" ] && [ -x "${DIR}/$i" ]; then
+               SSHD_AUTH="${DIR}/$i"
+       fi
+done
+[ -z "${SSHD_AUTH}" ] && fatal "Could not find sshd-auth"
+
+for i in sshd-session/obj/sshd-session sshd-session/sshd-session sshd-session; do
+       if [ -f "${DIR}/$i" ] && [ -x "${DIR}/$i" ]; then
+               SSHD_SESSION="${DIR}/$i"
+       fi
+done
+[ -z "${SSHD_SESSION}" ] && fatal "Could not find sshd-session"
+
+echo >&2 Debugging ${SSHD} auth ${SSHD_AUTH} session ${SSHD_SESSION}
+
+# Append SshdSessionPath and SshdAuthPath pointing to the build directory.
+# If you explicity specify these in the command line, the first-match
+# keyword semantics will override these.
+exec "${SSHD}" $@ \
+    -oSshdAuthPath="${SSHD_AUTH}" -oSshdSessionPath="${SSHD_SESSION}"