os-prober/os-prober-use-tmp-over-var-lib-for-transient-files.patch

From 2ed7c3ae98aa671d504eba254fdd89ea26fe15c8 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Thu, 7 Mar 2019 16:31:19 +0800
Subject: [PATCH] Use /tmp over /var/lib for transient files

Create transient mount point in directory /tmp rather than /var/lib
which is not available during transactional update. Also clean up the
count_last_label function for not relying on /var/lib/os-prober/labels
file for the caculation.

https://en.opensuse.org/openSUSE:Packaging_for_transactional-updates
---
 common.sh                                | 37 ++++++++++++++------------------
 linux-boot-prober                        |  2 +-
 linux-boot-probes/common/50mounted-tests |  2 +-
 os-prober                                |  3 ---
 os-probes/common/50mounted-tests         |  2 +-
 5 files changed, 19 insertions(+), 27 deletions(-)

diff --git a/common.sh b/common.sh
index 19d2668..d73718c 100644
--- a/common.sh
+++ b/common.sh
@@ -21,31 +21,26 @@ require_tmpdir() {
   fi
 }
 
-count_for() {
-  _labelprefix="$1"
-  _result=$(grep "^${_labelprefix} " /var/lib/os-prober/labels 2>/dev/null || true)
-
-  if [ -z "$_result" ]; then
-    return
-  else
-    echo "$_result" | cut -d' ' -f2
-  fi
-}
-
+OS_PROBER_LABELS=""
 count_next_label() {
-  require_tmpdir
-
   _labelprefix="$1"
-  _cfor="$(count_for "${_labelprefix}")"
-
-  if [ -z "$_cfor" ]; then
-    echo "${_labelprefix} 1" >> /var/lib/os-prober/labels
+  _count=""
+  _labels=""
+  for i in $OS_PROBER_LABELS; do
+    _label="`echo $i | cut -d: -f1`"
+    if [ x"$_labelprefix" = x"$_label" ]; then
+      _count=`echo $i | cut -d: -f2`
+      _labels="$_labels $_label:`expr $_count + 1`"
+    else
+      _labels="$_labels $i"
+    fi
+  done
+  if [ -z "$_count" ]; then
+    OS_PROBER_LABELS="$OS_PROBER_LABELS $_labelprefix:1"
   else
-    sed "s/^${_labelprefix} ${_cfor}/${_labelprefix} $(($_cfor + 1))/" /var/lib/os-prober/labels > "$OS_PROBER_TMP/os-prober.tmp"
-    mv "$OS_PROBER_TMP/os-prober.tmp" /var/lib/os-prober/labels
+    OS_PROBER_LABELS="$_labels"
   fi
-  
-  echo "${_labelprefix}${_cfor}"
+  echo "${_labelprefix}${_count}"
 }
 
 progname=
diff --git a/linux-boot-prober b/linux-boot-prober
index 243fd6c..4d0f5e8 100755
--- a/linux-boot-prober
+++ b/linux-boot-prober
@@ -7,7 +7,7 @@ newns "$@"
 require_tmpdir
 ERR="n"
 
-tmpmnt=/var/lib/os-prober/mount
+tmpmnt="$OS_PROBER_TMP/mount"
 if [ ! -d "$tmpmnt" ]; then
 	mkdir "$tmpmnt"
 fi
diff --git a/linux-boot-probes/common/50mounted-tests b/linux-boot-probes/common/50mounted-tests
index 84c3ced..7c9c717 100755
--- a/linux-boot-probes/common/50mounted-tests
+++ b/linux-boot-probes/common/50mounted-tests
@@ -42,7 +42,7 @@ elif [ -z "$types" ]; then
 	types="$(grep -v nodev /proc/filesystems)"
 fi
 
-tmpmnt=/var/lib/os-prober/mount
+tmpmnt="$OS_PROBER_TMP/mount"
 if [ ! -d "$tmpmnt" ]; then
 	mkdir "$tmpmnt"
 fi
diff --git a/os-prober b/os-prober
index fb0f93c..903eddb 100755
--- a/os-prober
+++ b/os-prober
@@ -141,9 +141,6 @@ parse_proc_mdstat () {
 	done
 }
 
-# Needed for idempotency
-rm -f /var/lib/os-prober/labels
-
 for prog in /usr/lib/os-probes/init/*; do
 	if [ -x "$prog" ] && [ -f "$prog" ]; then
 		"$prog" || true
diff --git a/os-probes/common/50mounted-tests b/os-probes/common/50mounted-tests
index a9c20ef..9555c39 100755
--- a/os-probes/common/50mounted-tests
+++ b/os-probes/common/50mounted-tests
@@ -58,7 +58,7 @@ elif [ -z "$types" ]; then
 	exit 0
 fi
 
-tmpmnt=/var/lib/os-prober/mount
+tmpmnt="$OS_PROBER_TMP/mount"
 if [ ! -d "$tmpmnt" ]; then
 	mkdir "$tmpmnt"
 fi
-- 
2.16.4