Add new exists and autocreate wallet server interfaces. The first

states whether a given object exists and the second attempts to create
the object using the default owner rules.  Remove default owner
handling from the create interface, which is now for administrators
only.  Remove server-side auto-creation of objects on get or store and
instead have the client check for object existence and call autocreate
if necessary.  This removes confusion between default ACLs and
administrative object creation for users who are also on the ADMIN
ACL.

1 files changed, 45 insertions, 0 deletions

diff --git a/client/remctl.c b/client/remctl.c
index 6d80bf2..aa9a9f8 100644
--- a/client/remctl.c
+++ b/client/remctl.c
@@ -72,3 +72,48 @@ run_command(struct remctl *r, const char **command, char **data,
     } while (output->type != REMCTL_OUT_DONE);
     return status;
 }
+
+
+/*
+**  Check whether an object exists using the exists wallet interface.  Returns
+**  true if it does, false if it doesn't, and dies on remctl errors.
+*/
+int
+object_exists(struct remctl *r, const char *prefix, const char *type,
+              const char *name)
+{
+    const char *command[5];
+    char *data = NULL;
+    size_t length;
+
+    command[0] = prefix;
+    command[1] = "exists";
+    command[2] = type;
+    command[3] = name;
+    command[4] = NULL;
+    if (run_command(r, command, &data, &length) != 0)
+        exit(1);
+    if (length == 4 && strncmp(data, "yes\n", 4) == 0)
+        return 1;
+    else
+        return 0;
+}
+
+
+/*
+**  Attempt autocreation of an object.  Dies if autocreation fails.
+*/
+void
+object_autocreate(struct remctl *r, const char *prefix, const char *type,
+                  const char *name)
+{
+    const char *command[5];
+
+    command[0] = prefix;
+    command[1] = "autocreate";
+    command[2] = type;
+    command[3] = name;
+    command[4] = NULL;
+    if (run_command(r, command, NULL, NULL) != 0)
+        exit(1);
+}