[source] opkg: run prerm scripts for the old version also on upgrade

[LEDE Commits]

jogo pushed a commit to source.git, branch master:
https://git.lede-project.org/88a14bfd1da55bbddf5a86b3c452f1d8b1c46a60

commit 88a14bfd1da55bbddf5a86b3c452f1d8b1c46a60
Author: Jonas Gorski <jonas.gorski at gmail.com>
AuthorDate: Mon Nov 21 15:20:32 2016 +0100

    opkg: run prerm scripts for the old version also on upgrade
    
    To make sure we properly restart services on upgrade we need to
    call the prerm script of the old package, in case the init script
    changes (or vanishes).
    
    Signed-off-by: Jonas Gorski <jonas.gorski at gmail.com>
    Acked-by: Jo-Philipp Wich <jo at mein.io>
---
 package/system/opkg/Makefile                       |  2 +-
 ...-call-prerm-and-postrm-scripts-on-upgrade.patch | 73 ++++++++++++++++++++++
 2 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/package/system/opkg/Makefile b/package/system/opkg/Makefile
index 5b96fea..2a04c4d 100644
--- a/package/system/opkg/Makefile
+++ b/package/system/opkg/Makefile
@@ -13,7 +13,7 @@ include $(INCLUDE_DIR)/feeds.mk
 PKG_NAME:=opkg
 PKG_REV:=9c97d5ecd795709c8584e972bfdf3aee3a5b846d
 PKG_VERSION:=$(PKG_REV)
-PKG_RELEASE:=14
+PKG_RELEASE:=15
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_VERSION:=$(PKG_REV)
diff --git a/package/system/opkg/patches/280-call-prerm-and-postrm-scripts-on-upgrade.patch b/package/system/opkg/patches/280-call-prerm-and-postrm-scripts-on-upgrade.patch
new file mode 100644
index 0000000..6abbd5d
--- /dev/null
+++ b/package/system/opkg/patches/280-call-prerm-and-postrm-scripts-on-upgrade.patch
@@ -0,0 +1,73 @@
+From a8555d352d2851ee1482b74b57ba9eacfb354c18 Mon Sep 17 00:00:00 2001
+From: Peter Urbanec <peteru at urbanec.net>
+Date: Thu, 23 Oct 2014 01:05:35 +1100
+Subject: [PATCH] opkg_install: Call prerm and postrm scripts on package
+ upgrade
+
+When upgrading a package from v1 to v2, run "v1-prerm upgrade v2" and
+"v1-postrm upgrade v2", similarly to what dpkg does.
+
+This patch fixes issue 104.
+
+Signed-off-by: Peter Urbanec <openembedded-devel at urbanec.net>
+Signed-off-by: Paul Barker <paul at paulbarker.me.uk>
+---
+ libopkg/opkg_install.c | 40 ++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 38 insertions(+), 2 deletions(-)
+
+--- a/libopkg/opkg_install.c
++++ b/libopkg/opkg_install.c
+@@ -528,7 +528,25 @@ prerm_upgrade_old_pkg(pkg_t *pkg, pkg_t
+ 	   Error unwind, for both the above cases:
+ 	   old-postinst abort-upgrade new-version
+      */
+-     return 0;
++    int err;
++    char *script_args;
++    char *new_version;
++
++    if (!old_pkg || !pkg)
++        return 0;
++
++    new_version = pkg_version_str_alloc(pkg);
++
++    sprintf_alloc(&script_args, "upgrade %s", new_version);
++    free(new_version);
++    err = pkg_run_script(old_pkg, "prerm", script_args);
++    free(script_args);
++    if (err != 0) {
++        opkg_msg(ERROR, "prerm script for package \"%s\" failed\n",
++                 old_pkg->name);
++        return -1;
++    }
++    return 0;
+ }
+ 
+ static int
+@@ -925,7 +943,25 @@ postrm_upgrade_old_pkg(pkg_t *pkg, pkg_t
+ 	   new-postrm failed-upgrade old-version
+ 	Error unwind, for both cases:
+ 	   old-preinst abort-upgrade new-version    */
+-     return 0;
++    int err;
++    char *script_args;
++    char *new_version;
++
++    if (!old_pkg || !pkg)
++        return 0;
++
++    new_version = pkg_version_str_alloc(pkg);
++
++    sprintf_alloc(&script_args, "upgrade %s", new_version);
++    free(new_version);
++    err = pkg_run_script(old_pkg, "postrm", script_args);
++    free(script_args);
++    if (err != 0) {
++        opkg_msg(ERROR, "postrm script for package \"%s\" failed\n",
++                 old_pkg->name);
++        return -1;
++    }
++    return 0;
+ }
+ 
+ static int