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diff --git a/01_Functions.zsh b/01_Functions.zsh
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+##
+## Part of configuration files for Zsh 4
+## by Hugues Hiegel <hugues@hiegel.fr>
+## 
+## NO WARRANTY PROVIDED, USE AT YOUR OWN RISKS
+##
+## You are encouraged to use, modify, and redistribute
+## these files with or without this notice.
+## 
+
+term_title()
+{
+  [[ -t 1 ]] &&
+    case $TERM in
+      sun-cmd)
+        print -Pn "\e]l%n@%m %~$1\e\\" ;;
+      *term*|rxvt*)
+	    print -Pn "\e]0;%n@%m (%l) %~$1\a" ;;
+    esac
+}
+
+_chpwd()
+{
+    term_title
+}
+
+chpwd()
+{
+    _chpwd
+    which todo > /dev/null 2>&1 && todo
+}
+
+precmd ()
+{
+##   [[ -t 1 ]] &&
+#    print -nP "%(?,,%{%}Foirage n°%{%}%?\n)%{%}"
+    _chpwd
+}
+
+preexec ()
+{
+    term_title " ··· $1"
+}
+
+cmd_exists ()
+{
+	which $1 2>/dev/null >&2
+}
+
+normal_user ()
+{
+	eval `grep -v '^[$#]' /etc/login.defs | tr -d '[:blank:]' | sed 's/^[A-Z_]\+/&=/'`
+	test \( $UID -ge $UID_MIN \) -a \( $UID -le $UID_MAX \)
+}
+
+privileged_user ()
+{
+	! normal_user
+}
+