added function for chained grep commands

functions

@@ -2,7 +2,7 @@
 # pyr0ball script functions library
 
 # Initial Vars
-functionsrev=1.1.14
+functionsrev=1.1.15
 #scriptname="${BASH_SOURCE[0]##*/}"
 #rundir="${BASH_SOURCE[0]%/*}"
 #rundir_absolute=$(cd $rundir && pwd)
@@ -524,6 +524,8 @@ install-dir() {
     done < <(find "$_source" -type f -print0)
 }
 
+# Utilities
+
 clone-repo(){
     # git clone <source url> <destination>
     local _url=$1
@@ -534,11 +536,33 @@ clone-repo(){
     run git clone --recurse-submodules $_url $_destination
 }
 
+# Executes: grep "$1" | grep "$2" | grep "$3" | ...
+chained-grep(){
+    local pattern="$1"
+    if [[ -z "$pattern" ]]; then
+        cat
+        return
+    fi    
+
+    shift
+    grep -- "$pattern" | chained-grep "$@"
+}
+
+# Remove leading/trailing whitespace
+trim() {
+  local var=$1
+  var="${var#"${var%%[![:space:]]*}"}"
+  var="${var%"${var##*[![:space:]]}"}"
+  printf '%s' "$var"
+}
+
 ctrl_c(){
   echo -e "\n"
 	fail "User interrupted with Ctrl-C"
 }
 
+# Cosmetics
+
 prbl-logo(){
   echo -e \
 "
@@ -678,7 +702,7 @@ spinstart() {
   sstop=false
   tput civis
   sc=0
-  while [[ $sstop == false ]] ; do
+  until [[ $sstop != false ]] ; do
     for i in "${FRAME[@]}" ; do
       printf "\b${FRAME:sc++:1}"
       ((sc==${#FRAME})) && sc=0
@@ -711,6 +735,8 @@ printf "\rProgress : [${_done// /#}${_left// /-}] ${_progress}%%"
 
 }
 
+# Menu functions
+
 # Renders a text based list of options that can be selected by the
 # user using up, down and enter keys and returns the chosen option.
 #
@@ -976,6 +1002,10 @@ vercomp() {
     return 0
 }
 
+check-prbl-version(){
+  vercomp 
+}
+
 compare-versions() {
     vercomp $1 $2
     case $? in