Re: [Libguestfs] alternatives for hooking dlopen() without LD_LIBRARY_PATH or LD_AUDIT?

On Fri, Feb 21, 2020 at 01:19:34PM +0100, Florian Weimer wrote: nbdkit is a standalone binary that happens to be able to load plugins from a well-known path, eg nbdkit-vddk-plugin.so. nbdkit knows the path for plugins, and there's a wrapper allowing it to get local plugins even when it's still in the build directory. Adding another file would mean another path (or overloading the meaning of the plugin path) and just makes the whole thing more fragile and complex. Having said all that, what would also solve this is either an API for updating LD_LIBRARY_PATH after the program has started; or making setenv ("LD_LIBRARY_PATH",...) DTRT*; or some kind of dlopen() variant which takes a library path as an extra parameter. Rich. * “Why does setenv ("LD_LIBRARY_PATH") not work?” has several stackoverflow answers. Apparently even the JDK has to work around this by re-execing. https://www.google.com/search?q=setenv+%22LD_LIBRARY_PATH%22+site:stackov... -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html