[Libguestfs] [PATCH] Replace shell_quote function with %Q and %R printf specifiers.

At the moment the daemon code contains an incredibly hairy function called shell_quote for safely quoting strings passed to the shell. The patch replaces that with a glibc custom printf format (actually two, but very closely related), %Q and %R. %Q is like %s but it safely shell quotes the string. %R is like %Q but it prefixes the path with /sysroot. Example usage (w/o error checks): asprintf (&cmd, "zcat %R | tar xvf -", path); ==> "zcat /sysroot/path\ with\ spaces | tar xvf -" Rich. [One of the nice things about OCaml is this sort of safe shell quoting is built in to the stdlib functions]. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 75 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora