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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Mon, 26 Nov 2018 10:06:42 +0100
Subject: [PATCH] Make the menu entry users option argument to be optional
The --users option is used to restrict the access to specific menu entries
only to a set of users. But the option requires an argument to either be a
constant or a variable that has been set. So for example the following:
menuentry "May be run by superusers or users in $users" --users $users {
linux /vmlinuz
}
Would fail if $users is not defined and grub would discard the menu entry.
Instead, allow the --users option to have an optional argument and ignore
the option if the argument was not set.
Related: rhbz#1652434
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---
grub-core/commands/menuentry.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/grub-core/commands/menuentry.c b/grub-core/commands/menuentry.c
index b194123eb67..b175a1b43b7 100644
--- a/grub-core/commands/menuentry.c
+++ b/grub-core/commands/menuentry.c
@@ -29,7 +29,7 @@ static const struct grub_arg_option options[] =
{
{"class", 1, GRUB_ARG_OPTION_REPEATABLE,
N_("Menu entry type."), N_("STRING"), ARG_TYPE_STRING},
- {"users", 2, 0,
+ {"users", 2, GRUB_ARG_OPTION_OPTIONAL,
N_("List of users allowed to boot this entry."), N_("USERNAME[,USERNAME]"),
ARG_TYPE_STRING},
{"hotkey", 3, 0,
@@ -281,7 +281,7 @@ grub_cmd_menuentry (grub_extcmd_context_t ctxt, int argc, char **args)
if (! ctxt->state[3].set && ! ctxt->script)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no menuentry definition");
- if (ctxt->state[1].set)
+ if (ctxt->state[1].set && ctxt->state[1].arg)
users = ctxt->state[1].arg;
else if (ctxt->state[5].set)
users = NULL;