\newcommand{\ids}[1]{\textsl{#1}} % Identifier (PID, GID, UID, TID, ecc.)
\newcommand{\envvar}[1]{\texttt{#1}} % environment variable
+\newcommand{\samplefunc}[1]{\texttt{#1}} % funzione degli esempi
\newcommand{\itindex}[1]{%
\index{#1@{\textit{#1}}}%