dpkg/update-alternatives-slavetomaster.patch

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Index: dpkg-1.19.0.5/utils/update-alternatives.c
===================================================================
--- dpkg-1.19.0.5.orig/utils/update-alternatives.c
+++ dpkg-1.19.0.5/utils/update-alternatives.c
@@ -1796,7 +1796,10 @@ alternative_prepare_install(struct alter
/* Drop unused slave. */
fn = xasprintf("%s/%s", altdir, sl->name);
if (alternative_path_can_remove(sl->link))
- alternative_add_commit_op(a, OPCODE_RM, sl->link, NULL);
+ if (strcmp(sl->link, a->master_link))
+ alternative_add_commit_op(a, OPCODE_RM, sl->link, NULL);
+ else
+ warning("not removing %s, now master", a->master_link);
else
warning(_("not removing %s since it's not a symlink"),
sl->link);