search for: dup_intern

On Wed, Aug 26, 2020 at 09:16:48PM -0500, Eric Blake wrote: > Implementing .default_export with its 'const char *' return is tricky > in the sh plugin: we must return dynamic memory, but must avoid a > use-after-free. And we don't want to change the return type of > .default_export to 'char *', because that would make our choice of > malloc()/free() part of the

...on. However be careful when modifying strings because for some methods (eg. C<.config>) the plugin may save the string pointer that you pass along. So you may have to ensure that the string is not freed for the -lifetime of the server. +lifetime of the server; you may find C<nbdkit_strdup_intern> helpful +for avoiding a memory leak while still obeying lifecycle constraints. Note that if your filter registers a callback but in that callback it doesn't call the C<next> function then the corresponding method in the @@ -450,8 +451,10 @@ requires write access to the underlying d...

...quot;) - the tar filter should consider an exportname mode - figure out how to let filters open the plugin without a current connection into the filter Eric Blake (8): api: Add .default_export api: Add nbdkit_add_default_export server: Respond to NBD_INFO_NAME request api: Add nbdkit_str[n]dup_intern helper sh, eval: Implement .default_export api: Alter .list_exports api: Add .export_description exportname: New filter docs/nbdkit-filter.pod | 56 ++- docs/nbdkit-plugin.pod | 123 ++++++- docs/nbdkit-protocol.pod | 14...