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

[Daniel P. Berrange]

On Mon, Jul 27, 2009 at 10:42:17PM +0100, Richard W.M. Jones wrote:
> 
> 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.

Wow, I didn't know you could register custom printf formats !

> +  /* http://udrepper.livejournal.com/20948.html */
> +  register_printf_specifier ('Q', print_shell_quote, print_arginfo);
> +  register_printf_specifier ('R', print_sysroot_shell_quote, print_arginfo);

Perhaps want to see if you can also make it work with

/* Obsolete interface similar to register_printf_specifier.  It can only
   handle basic data types because the ARGINFO callback does not return
   information on the size of the user-defined type.  */

extern int register_printf_function (int __spec, printf_function __func,
                                     printf_arginfo_function __arginfo)


so that libguestfs still compiles on older distros like RHEL-5/EPEL5, 
unless they're explicitly out of scope as targets now ?

Daniel
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