From 963bfdb2067243dbb36a91720b06e809ce784d39 Mon Sep 17 00:00:00 2001
From: "Costa Tsaousis (ktsaou)" <costa@tsaousis.gr>
Date: Wed, 15 Mar 2017 02:21:50 +0200
Subject: [PATCH] allow the installer to check configs signatures when the BASH
 is older than v4

---
 netdata-installer.sh | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/netdata-installer.sh b/netdata-installer.sh
index c49ef32c..d11e9623 100755
--- a/netdata-installer.sh
+++ b/netdata-installer.sh
@@ -507,6 +507,24 @@ then
     fi
 fi
 
+config_signature_matches() {
+    local md5="${1}" file="${2}"
+
+    if [ "${BASH_VERSINFO[0]}" -ge "4" ]
+        then
+        [ "${configs_signatures[${md5}]}" = "${file}" ] && return 0
+        return 1
+    fi
+
+    if [ -f "configs.signatures" ]
+        then
+        grep "\['${md5}'\]='${file}'" "configs.signatures" >/dev/null
+        return $?
+    fi
+
+    return 1
+}
+
 # backup user configurations
 installer_backup_suffix="${PID}.${RANDOM}"
 for x in $(find "${NETDATA_PREFIX}/etc/netdata/" -name '*.conf' -type f)
@@ -534,19 +552,13 @@ do
                 cp "conf.d/${f}" "${x}.orig"
             fi
 
-            if [ "${BASH_VERSINFO[0]}" -ge "4" ]
-            then
-                if [ "${configs_signatures[${md5}]}" = "${f}" ]
+            if config_signature_matches "${md5}" "${f}"
                 then
-                    # it is a stock version - don't keep it
-                    echo >&2 "File '${TPUT_CYAN}${x}${TPUT_RESET}' is stock version."
-                else
-                    # edited by user - keep it
-                    echo >&2 "File '${TPUT_CYAN}${x}${TPUT_RESET}' ${TPUT_RED} has been edited by user${TPUT_RESET}. Keeping it."
-                    run cp -p "${x}" "${x}.installer_backup.${installer_backup_suffix}"
-                fi
+                # it is a stock version - don't keep it
+                echo >&2 "File '${TPUT_CYAN}${x}${TPUT_RESET}' is stock version."
             else
-                echo >&2 "File '${TPUT_CYAN}${x}${TPUT_RESET}' ${TPUT_RET}cannot be checked for custom edits${TPUT_RESET}. Keeping it."
+                # edited by user - keep it
+                echo >&2 "File '${TPUT_CYAN}${x}${TPUT_RESET}' ${TPUT_RED} has been edited by user${TPUT_RESET}. Keeping it."
                 run cp -p "${x}" "${x}.installer_backup.${installer_backup_suffix}"
             fi
         fi
-- 
2.39.2