[pve-devel] [PATCH proxmox-mail-forward 1/1] install to /usr/libexec instead of /usr/bin

[Lukas Wagner]

/usr/libexec is intended for binaries which are not intended to be
called by users manually. proxmox-mail-forwarded is only ever supposed
to be called by Postfix via the forwarding mechanism in /root/.forward,
so the binary should be located in /usr/libexec.

The postinst script will automatically migrate the contents of
/root/.forward if needed.

Signed-off-by: Lukas Wagner <l.wagner at proxmox.com>
---
 Makefile                             |  2 --
 debian/lintian-overrides             |  2 +-
 debian/proxmox-mail-forward.postinst | 13 ++++++++++---
 debian/rules                         |  9 ++++++++-
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile
index 719a865..8b0f728 100644
--- a/Makefile
+++ b/Makefile
@@ -53,9 +53,7 @@ cargo-build:
 	    --bin proxmox-mail-forward
 
 install: cargo-build
-	install -dm755 $(DESTDIR)/usr/bin
 	$(CARGO) install
-	chmod u+s $(DESTDIR)/usr/bin/$(PACKAGE)
 
 .PHONY: upload
 upload: $(DEBS)
diff --git a/debian/lintian-overrides b/debian/lintian-overrides
index bde570e..e8955c1 100644
--- a/debian/lintian-overrides
+++ b/debian/lintian-overrides
@@ -1 +1 @@
-proxmox-mail-forward: elevated-privileges 4755 root/root [usr/bin/proxmox-mail-forward]
+proxmox-mail-forward: elevated-privileges 4755 root/root [usr/libexec/proxmox-mail-forward]
diff --git a/debian/proxmox-mail-forward.postinst b/debian/proxmox-mail-forward.postinst
index c4b8741..af4af8f 100755
--- a/debian/proxmox-mail-forward.postinst
+++ b/debian/proxmox-mail-forward.postinst
@@ -4,9 +4,16 @@ set -e
 
 case "$1" in
     configure)
-        # pve-manager is responsible for switching over, so skip when detecting pvemailforward
-        if ! test -f /root/.forward || ! grep -E -q '\|/usr/bin/(proxmox-mail-|pvemail)forward' /root/.forward; then
-            echo '|/usr/bin/proxmox-mail-forward' >>/root/.forward
+        # Always try to clean old entry, even when the
+        # /usr/libexec/proxmox-mail-forward entry is already present. This
+        # ensures it will still be cleaned after an upgrade following a
+        # downgrade.
+        if test -f /root/.forward; then
+           sed -i '\!|/usr/bin/proxmox-mail-forward!d' /root/.forward
+        fi
+
+        if ! test -f /root/.forward || ! grep -q '|/usr/libexec/proxmox-mail-forward' /root/.forward; then
+            echo '|/usr/libexec/proxmox-mail-forward' >>/root/.forward
         fi
     ;;
 
diff --git a/debian/rules b/debian/rules
index c9fa5cd..cc2ec17 100755
--- a/debian/rules
+++ b/debian/rules
@@ -25,9 +25,16 @@ override_dh_auto_configure:
 	$(CARGO) prepare-debian $(CURDIR)/debian/cargo_registry --link-from-system
 	dh_auto_configure
 
+execute_after_dh_auto_install:
+	# Install the binary to /usr/libexec, not /usr/bin. Inspired by virtiofsd's d/rules
+	mkdir -p debian/proxmox-mail-forward/usr/libexec
+	mv debian/proxmox-mail-forward/usr/bin/proxmox-mail-forward debian/proxmox-mail-forward/usr/libexec/
+	chmod u+s debian/proxmox-mail-forward/usr/libexec/proxmox-mail-forward
+	rmdir debian/proxmox-mail-forward/usr/bin
+
 override_dh_fixperms:
 	dh_fixperms --exclude proxmox-mail-forward
 
 override_dh_strip:
 	dh_strip
-	patchelf --remove-needed librt.so.1 debian/proxmox-mail-forward/usr/bin/proxmox-mail-forward
+	patchelf --remove-needed librt.so.1 debian/proxmox-mail-forward/usr/libexec/proxmox-mail-forward
-- 
2.39.5