make log file destination configurable

config.cfg.sample

@@ -18,3 +18,6 @@ MAXBAK=3
 
 # SSH key
 #SSH_KEY="~/.ssh/mykey_rsa"
+
+# Logfile. Default: $CURDIR/backup.log
+# LOG_FILE=/var/log/uberspace-backup.log

uberspace-backup.sh

@@ -15,6 +15,9 @@ set -Eeuo pipefail
 # Set correct UTF-8 encoding (for FreeBSD jail)
 export LC_ALL=en_US.UTF-8
 
+# Initialise variables
+LOG_FILE=
+
 CURDIR=$(dirname "$(readlink -f "$0")")
 if [ ! -e "$CURDIR"/config.cfg ]; then echo "Missing config.cfg file. Edit and rename config.cfg.sample"; exit 1; fi
 source "$CURDIR"/config.cfg
@@ -29,9 +32,13 @@ else
   SSH_KEY=~/.ssh/id_rsa
 fi
 
+if [ -z "${LOG_FILE}" ]; then
+  # defaults
+  LOG_FILE="$CURDIR"/backup.log
+fi
+
 # Get current date
 DATE=$(date +"%Y-%m-%d_%H-%M")
-LOG="$CURDIR"/backup.log
 
 function trim {
   sed -r -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g'
@@ -43,7 +50,7 @@ function pdate {
 function logecho {
   # Echo string and copy it to log while attaching the current date
   echo "$(pdate) $*"
-  echo "$(pdate) $*" >> "$LOG"
+  echo "$(pdate) $*" >> "$LOG_FILE"
 }
 
 # Loop over all hosts