random: Add a trivfs_server_name

glibc uses /dev/urandom for getrandom(), and from version 2.34 malloc
initialization uses it. We need to be able to know whether we are
running the random translator itself, in which case we can't read
ourself.

1 files changed, 9 insertions, 1 deletions

diff --git a/libtrivfs/io-version.c b/libtrivfs/io-version.c
index e656d5cc..59a0ebef 100644
--- a/libtrivfs/io-version.c
+++ b/libtrivfs/io-version.c
@@ -27,5 +27,13 @@ trivfs_S_io_server_version (trivfs_protid_t obj,
 			    int *min,
 			    int *edit)
 {
-  return EOPNOTSUPP;
+  if (!obj)
+    return EOPNOTSUPP;
+
+  if (!&trivfs_server_name || !&trivfs_server_version)
+    return EOPNOTSUPP;
+
+  snprintf (name, sizeof (string_t), "%s %s",
+	    trivfs_server_name, trivfs_server_version);
+  return 0;
 }