unixodbc: auto-generate odbcinst.ini

This allows ODBC drivers to create odbcinst.ini-snippets in
/etc/odbcinst.ini.d/ which will be assembled into
/tmp/etc/odbcinst.ini. /etc/odbcinst.ini is provided as a symlink
pointing to /tmp/etc/odbcinst.ini
Hence the unixODBC-provided PostgreSQL driver was also given an
odbcinst.ini.d snippet.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

libs/unixodbc/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=unixodbc
 PKG_VERSION:=2.3.4
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_URL:=ftp://ftp.unixodbc.org/pub/unixODBC/
 PKG_SOURCE:=unixODBC-$(PKG_VERSION).tar.gz
@@ -98,8 +98,9 @@ define Package/unixodbc/install
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libodbc[ci]*so* $(1)/usr/lib/
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libodbc.*so* $(1)/usr/lib/
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libnn*so* $(1)/usr/lib/
-	$(INSTALL_DIR) $(1)/etc
-	$(CP) $(PKG_INSTALL_DIR)/etc/odbc* $(1)/etc/
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/odbc.init $(1)/etc/init.d/odbc
+	$(LN) /tmp/etc/odbcinst.ini $(1)/etc/odbcinst.ini
 endef
 
 define Package/unixodbc-tools/install
@@ -110,6 +111,10 @@ endef
 define Package/pgsqlodbc/install
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libodbcpsql*so* $(1)/usr/lib/
+	$(INSTALL_DIR) $(1)/etc/odbcinst.ini.d/
+	echo "[PostgreSQL]" > $(1)/etc/odbcinst.ini.d/pgsqlodbc.ini
+	echo "Description = unixODBC PostgreSQL driver" >> $(1)/etc/odbcinst.ini.d/pgsqlodbc.ini
+	echo "Driver = /usr/lib/libodbcpsql.so" >> $(1)/etc/odbcinst.ini.d/pgsqlodbc.ini
 endef
 
 $(eval $(call BuildPackage,unixodbc))

libs/unixodbc/files/odbc.init

@@ -0,0 +1,26 @@
+#!/bin/sh /etc/rc.common
+
+START=50
+
+gen_odbcinst() {
+	local inifile
+
+	echo "[ODBC]"
+	echo "Trace = off"
+	echo "TraceFile ="
+
+	for inifile in /etc/odbcinst.ini.d/*.ini; do
+		cat "$inifile"
+	done
+}
+
+start() {
+	[ ! -d /tmp/etc ] && mkdir /tmp/etc
+
+	gen_odbcinst > /tmp/etc/odbcinst.ini.new
+	chmod 0644 /tmp/etc/odbcinst.ini.new
+
+	[ -e /tmp/etc/odbcinst.ini ] && ( rm /tmp/etc/odbcinst.ini || return 1 )
+
+	mv /tmp/etc/odbcinst.ini.new /tmp/etc/odbcinst.ini
+}