IPMPROG-9900 : add route to /etc/hosts

Makefile.am

@@ -248,6 +248,7 @@ ipc_meta_setupdir = $(datadir)/@PACKAGE@/setup/
 ipc_meta_setup_SCRIPTS = \
 	$(top_srcdir)/setup/01-bios-eula.sh \
 	$(top_srcdir)/setup/02-migrate-users-bios-script.sh \
+	$(top_srcdir)/setup/09-install-hosts-redirect.everytime.sh \
 	$(top_srcdir)/setup/09-install-swap-memory.everytime.sh \
 	$(top_srcdir)/setup/10-bios-gpio.sh \
 	$(top_srcdir)/setup/11-forget-bios-devsvcs-1.sh \
@@ -273,6 +274,7 @@ ipc_meta_setup_SCRIPTS = \
 EXTRA_DIST += \
 	$(top_srcdir)/setup/01-bios-eula.sh \
 	$(top_srcdir)/setup/02-migrate-users-bios-script.sh \
+	$(top_srcdir)/setup/09-install-hosts-redirect.everytime.sh \
 	$(top_srcdir)/setup/09-install-swap-memory.everytime.sh \
 	$(top_srcdir)/setup/10-bios-gpio.sh \
 	$(top_srcdir)/setup/11-forget-bios-devsvcs-1.sh \

setup/09-install-hosts-redirect.everytime.sh

@@ -0,0 +1,88 @@
+#!/bin/sh
+
+#
+#   Copyright (c) 2020 Eaton
+#
+#   This file is part of the Eaton 42ity project.
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program; if not, write to the Free Software Foundation, Inc.,
+#   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#! \file    09-install-hosts-redirect.everytime.sh
+#  \brief   Complete original /etc/hosts file with redirection addons
+
+HOSTS="/etc/hosts"
+HOSTS_BACKUP="/etc/hosts.ipm.backup"
+HOSTS_ADDONS="/tmp/hosts.ipm.addons" # editable by admin user
+
+RET=0
+
+if [ ! -f $HOSTS ]; then
+    echo "ERROR: $HOSTS not found"
+    RET=1
+elif [ ! -f $HOSTS_ADDONS ]; then
+    # hosts exists and no host addons is given
+    # restore hosts file from backup (if exists)
+    if [ -f $HOSTS_BACKUP ]; then
+        cp $HOSTS_BACKUP $HOSTS
+        if [ $? -eq 0 ]; then
+            echo "INFO: restore $HOSTS from $HOSTS_BACKUP"
+            # delete backup (no error)
+            rm -f $HOSTS_BACKUP || true
+        else
+            echo "ERROR: restore $HOSTS from $HOSTS_BACKUP failed"
+            RET=1
+        fi
+    fi
+else
+    # hosts exists and hosts addons is given
+
+    # backup hosts file *once* (hosts original, valid)
+    if [ ! -f $HOSTS_BACKUP ]; then
+        cp $HOSTS $HOSTS_BACKUP
+        if [ $? -eq 0 ]; then
+            echo "INFO: $HOSTS_BACKUP creation"
+        else
+            echo "ERROR: $HOSTS_BACKUP creation failed"
+            RET=1
+        fi
+    fi
+
+    if [ $RET -eq 0 ]; then
+        # backup is ok
+
+        # concat HOSTS_BACKUP & HOSTS_ADDONS in a tmpfile
+        TMPFILE="$(mktemp)"
+        echo "# Generated by $(basename "$0")" >> $TMPFILE
+        echo "# $(date)" >> $TMPFILE
+        echo "$(cat $HOSTS_BACKUP)" >> $TMPFILE
+        echo "$(cat $HOSTS_ADDONS)" >> $TMPFILE
+
+        # replace hosts file by tmpfile (new hosts)
+        cp $TMPFILE $HOSTS
+        if [ $? -eq 0 ]; then
+            echo "INFO: $HOSTS_ADDONS processing succeeded"
+        else
+            echo "ERROR: $HOSTS_ADDONS processing failed"
+            RET=1
+            # restore hosts file from backup (no error)
+            cp $HOSTS_BACKUP $HOSTS || true
+        fi
+
+        # cleanup tmpfile (no error)
+        rm -f $TMPFILE || true
+    fi
+fi
+
+exit $RET