Allow setting export filters when exporting keys

* src/context.h (struct gpgme_context): New field export_filter.
* src/engine-backend.h (struct engine_ops): Add arg export_filter to
field 'export' and field 'export_ext'.
* src/engine-gpg.c (export_common): Add arg export_filter and pass
option --export-filter with argument value to gpg.
(gpg_export, gpg_export_ext): Add arg export_filter and pass it to
export_common. Adjust all callers of the two functions.
* src/engine-gpgsm.c (gpgsm_export, gpgsm_export_ext): Add dummy arg
export_filter.
* src/gpgme.c (gpgme_release): Free 'export_filter'.
(gpgme_set_ctx_flag, gpgme_get_ctx_flag): New flag "export-filter".

* tests/run-export.c (main): Add option --export-filter.
--

This makes the --export-filter option available in the GPGME API for
key exports.

GnuPG-bug-id: 8033

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gpgme.c b/src/gpgme.c
index f37d3fa6..7025b20b 100644
--- a/src/gpgme.c
+++ b/src/gpgme.c
@@ -263,6 +263,7 @@ gpgme_release (gpgme_ctx_t ctx)
   free (ctx->import_filter);
   free (ctx->import_options);
   free (ctx->known_notations);
+  free (ctx->export_filter);
   _gpgme_engine_info_release (ctx->engine_info);
   ctx->engine_info = NULL;
   DESTROY_LOCK (ctx->lock);
@@ -631,6 +632,13 @@ gpgme_set_ctx_flag (gpgme_ctx_t ctx, const char *name, const char *value)
       if (!ctx->known_notations)
         err = gpg_error_from_syserror ();
     }
+  else if (!strcmp (name, "export-filter"))
+    {
+      free (ctx->export_filter);
+      ctx->export_filter = strdup (value);
+      if (!ctx->export_filter)
+        err = gpg_error_from_syserror ();
+    }
   else
     err = gpg_error (GPG_ERR_UNKNOWN_NAME);
 
@@ -728,6 +736,10 @@ gpgme_get_ctx_flag (gpgme_ctx_t ctx, const char *name)
     {
       return ctx->known_notations? ctx->known_notations: "";
     }
+  else if (!strcmp (name, "export-filter"))
+    {
+      return ctx->export_filter? ctx->export_filter : "";
+    }
   else
     return NULL;
 }