backupninja/lib/tools.in

#!@BASH@
# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:

# This file contains functions shared between ninjahelper and backupninja.

#####################################################
## MISC FUNCTIONS

#
# create a temporary file in a secure way.
#
function maketemp() {
   local tempfile=`mktemp /tmp/$1.XXXXXXXX`
   echo $tempfile
}

#
# compare version numbers.
# returns 0 if equal, 1 if $1>$2, and 2 if $1<$2
#

function compare_versions() {
   if [[ "$1" == "$2" ]]; then
      return 0
   fi
   local IFS=.
   local i version_1=($1) version_2=($2)
   for ((i=${#version_1[@]}; i<${#version_2[@]}; i++)); do
      version_1[i]=0
   done
   for ((i=0; i<${#version_1[@]}; i++)); do
      if [[ -z ${version_2[i]} ]]; then
         version_2[i]=0
      fi
      if ((10#${version_1[i]} > 10#${version_2[i]})); then
         return 1
      fi
      if ((10#${version_1[i]} < 10#${version_2[i]})); then
         return 2
      fi
   done
   return 0
}

#
# compare version numbers: >=
#

function version_ge() {
   compare_versions "$1" "$2"
   comp=$?
   [ $comp -eq 0 ] || [ $comp -eq 1 ]
}

#####################################################
## CONFIG-FILE RELATED FUNCTIONS

function setfile() {
   CURRENT_CONF_FILE=$1
}

function setsection() {
   CURRENT_SECTION=$1
}

#
# sets a global var with name equal to $1
# to the value of the configuration parameter $1
# $2 is the default.
#
function getconf() {
   CURRENT_PARAM=$1
   ret=`@AWK@ -f $libdirectory/parseini S=$CURRENT_SECTION P=$CURRENT_PARAM $CURRENT_CONF_FILE`
   # if nothing is returned, set the default
   if [ "$ret" == "" -a "$2" != "" ]; then
      ret="$2"
   fi

   # replace * with %, so that it is not globbed.
   ret="${ret//\\*/__star__}"

   # this is weird, but single quotes are needed to
   # allow for returned values with spaces. $ret is still expanded
   # because it is in an 'eval' statement.
   eval $1='$ret'
}