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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Javier Martinez Canillas <javierm@redhat.com>
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Date: Mon, 26 Nov 2018 10:06:42 +0100
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Subject: [PATCH] Make the menu entry users option argument to be optional
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The --users option is used to restrict the access to specific menu entries
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only to a set of users. But the option requires an argument to either be a
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constant or a variable that has been set. So for example the following:
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menuentry "May be run by superusers or users in $users" --users $users {
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linux /vmlinuz
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}
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Would fail if $users is not defined and grub would discard the menu entry.
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Instead, allow the --users option to have an optional argument and ignore
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the option if the argument was not set.
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Related: rhbz#1652434
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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---
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grub-core/commands/menuentry.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/grub-core/commands/menuentry.c b/grub-core/commands/menuentry.c
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index b194123eb6..b175a1b43b 100644
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--- a/grub-core/commands/menuentry.c
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+++ b/grub-core/commands/menuentry.c
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@@ -29,7 +29,7 @@ static const struct grub_arg_option options[] =
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{
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{"class", 1, GRUB_ARG_OPTION_REPEATABLE,
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N_("Menu entry type."), N_("STRING"), ARG_TYPE_STRING},
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- {"users", 2, 0,
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+ {"users", 2, GRUB_ARG_OPTION_OPTIONAL,
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N_("List of users allowed to boot this entry."), N_("USERNAME[,USERNAME]"),
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ARG_TYPE_STRING},
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{"hotkey", 3, 0,
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@@ -281,7 +281,7 @@ grub_cmd_menuentry (grub_extcmd_context_t ctxt, int argc, char **args)
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if (! ctxt->state[3].set && ! ctxt->script)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no menuentry definition");
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- if (ctxt->state[1].set)
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+ if (ctxt->state[1].set && ctxt->state[1].arg)
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users = ctxt->state[1].arg;
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else if (ctxt->state[5].set)
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users = NULL;
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