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98 lines
3.4 KiB
98 lines
3.4 KiB
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: Tue, 9 Apr 2019 13:12:40 +0200
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Subject: [PATCH] Don't assume that boot commands will only return on fail
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While it's true that for most loaders the boot command never returns, it
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may be the case that it does. For example the GRUB emulator boot command
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calls to systemctl kexec which in turn does an asynchonous call to kexec.
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So in this case GRUB will wrongly assume that the boot command fails and
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print a "Failed to boot both default and fallback entries" even when the
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kexec call later succeeds.
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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---
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grub-core/normal/menu.c | 23 +++++++++++++----------
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1 file changed, 13 insertions(+), 10 deletions(-)
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diff --git a/grub-core/normal/menu.c b/grub-core/normal/menu.c
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index d4832f17699..14ceb9bb060 100644
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--- a/grub-core/normal/menu.c
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+++ b/grub-core/normal/menu.c
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@@ -285,7 +285,7 @@ get_and_remove_first_entry_number (grub_menu_t menu, const char *name)
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}
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/* Run a menu entry. */
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-static void
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+static grub_err_t
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grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
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{
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grub_err_t err = GRUB_ERR_NONE;
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@@ -302,7 +302,7 @@ grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
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{
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grub_print_error ();
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grub_errno = GRUB_ERR_NONE;
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- return;
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+ return grub_errno;
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}
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errs_before = grub_err_printed_errors;
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@@ -315,7 +315,7 @@ grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
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grub_env_context_open ();
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menu = grub_zalloc (sizeof (*menu));
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if (! menu)
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- return;
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+ return grub_errno;
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grub_env_set_menu (menu);
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if (auto_boot)
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grub_env_set ("timeout", "0");
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@@ -385,7 +385,7 @@ grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
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if (grub_errno == GRUB_ERR_NONE && grub_loader_is_loaded ())
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/* Implicit execution of boot, only if something is loaded. */
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- grub_command_execute ("boot", 0, 0);
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+ err = grub_command_execute ("boot", 0, 0);
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if (errs_before != grub_err_printed_errors)
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grub_wait_after_message ();
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@@ -408,6 +408,8 @@ grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
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else
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grub_env_unset ("default");
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grub_env_unset ("timeout");
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+
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+ return err;
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}
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/* Execute ENTRY from the menu MENU, falling back to entries specified
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@@ -422,10 +424,13 @@ grub_menu_execute_with_fallback (grub_menu_t menu,
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void *callback_data)
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{
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int fallback_entry;
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+ grub_err_t err;
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callback->notify_booting (entry, callback_data);
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- grub_menu_execute_entry (entry, 1);
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+ err = grub_menu_execute_entry (entry, 1);
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+ if (err == GRUB_ERR_NONE)
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+ return;
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/* Deal with fallback entries. */
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while ((fallback_entry = get_and_remove_first_entry_number (menu, "fallback"))
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@@ -436,11 +441,9 @@ grub_menu_execute_with_fallback (grub_menu_t menu,
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entry = grub_menu_get_entry (menu, fallback_entry);
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callback->notify_fallback (entry, callback_data);
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- grub_menu_execute_entry (entry, 1);
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- /* If the function call to execute the entry returns at all, then this is
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- taken to indicate a boot failure. For menu entries that do something
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- other than actually boot an operating system, this could assume
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- incorrectly that something failed. */
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+ err = grub_menu_execute_entry (entry, 1);
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+ if (err == GRUB_ERR_NONE)
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+ return;
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}
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if (!autobooted)
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