improved code quality, few bug fixes

lib/filefct.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 # ------------------------------------------------------------------------------
 # File manipulation function
 # This file is part of the init.sh project
@@ -34,7 +35,7 @@ backup_dist()
 	if [[ -L ${file} ]]; then
 	    # With symbolik links we call again backup_dist to treat target
 	    prnt I "Following the symbolic link $file to do a proper backup..."
-	    backup_dist $(readlink -f ${file})
+	    backup_dist $(readlink -f "${file}")
 	elif [[ -f ${file} ]]; then
 	    prnt I "Creating a backup of ${file} on $tmstmp..."
 	    cp -av $file ${file}.dist.${tmstmp}
@@ -134,7 +135,7 @@ install_file()
 	prnt E "install_file(): At least two arguments are required."
 	die 11
     fi
-    if [[ $(echo $@ | grep "\*\|\?") ]]; then
+    if [[ -n $(echo $@ | grep "\*\|\?") ]]; then
 	prnt E "install_file(): Wildcards are not authorized."
 	die 7
     fi
@@ -215,7 +216,7 @@ is_dir_empty()
 	return 0
     fi
 
-    nbfiles=$(ls -a1 $dir | egrep -v '^.$|^..$' | wc -l)
+    nbfiles=$(ls -a1 $dir | grep -Evc '^.$|^..$')
     if [[ $nbfiles -eq 0 ]]; then
 	return 0
     fi
@@ -240,7 +241,7 @@ patch_file()
 
     # Create a sub-process, to avoid bash environment pollution
     (
-	local varlist= pattern=
+	local varlist='' pattern=''
 	if [[ $# -eq 0 ]] ; then
 	    pattern="-e s/<\(.*\)>/\$\1\$\1/g"
 	else
@@ -249,7 +250,6 @@ patch_file()
 		if ! declare -p $var >/dev/null 2>&1 ; then
 		    local $var=$(eval echo \$$var)
 		fi
-		export $var
 		pattern="$pattern -e s/@$var@/\$$var/g"
 		varlist=$varlist\$$var
 	    done