eficonfig: add "Delete Boot Option" menu entry

This commit adds the menu entry to delete the UEFI boot option.
User moves the entry with UP/DOWN key, changes, then presses
ENTER key to delete the selected boot option.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>

diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
index bd1975895bef096e76d922ae53fb48ccd3deb034..5841a3ffe12d62a399fbac609ddd162882fdc38f 100644 (file)
--- a/cmd/eficonfig.c
+++ b/cmd/eficonfig.c
@@ -1788,6 +1788,76 @@ out:
        return ret;
 }
 
+/**
+ * delete_boot_option() - delete selected boot option
+ *
+ * @boot_index:        boot option index to delete
+ * Return:     status code
+ */
+static efi_status_t delete_boot_option(u16 boot_index)
+{
+       u16 *bootorder;
+       u16 varname[9];
+       efi_status_t ret;
+       unsigned int index;
+       efi_uintn_t num, size;
+
+       efi_create_indexed_name(varname, sizeof(varname),
+                               "Boot", boot_index);
+       ret = efi_set_variable_int(varname, &efi_global_variable_guid,
+                                  0, 0, NULL, false);
+       if (ret != EFI_SUCCESS) {
+               log_err("delete boot option(%ls) failed\n", varname);
+               return ret;
+       }
+
+       /* update BootOrder if necessary */
+       bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
+       if (!bootorder)
+               return EFI_SUCCESS;
+
+       num = size / sizeof(u16);
+       if (!search_bootorder(bootorder, num, boot_index, &index))
+               return EFI_SUCCESS;
+
+       memmove(&bootorder[index], &bootorder[index + 1],
+               (num - index - 1) * sizeof(u16));
+       size -= sizeof(u16);
+       ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  size, bootorder, false);
+
+       return ret;
+}
+
+/**
+ * eficonfig_process_delete_boot_option() - handler to delete boot option
+ *
+ * @data:      pointer to the data for each entry
+ * Return:     status code
+ */
+static efi_status_t eficonfig_process_delete_boot_option(void *data)
+{
+       efi_status_t ret;
+       unsigned int selected;
+
+       while (1) {
+               ret = eficonfig_show_boot_selection(&selected);
+               if (ret == EFI_SUCCESS)
+                       ret = delete_boot_option(selected);
+
+               if (ret != EFI_SUCCESS)
+                       break;
+       }
+
+       /* to stay the parent menu */
+       ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
+
+       return ret;
+}
+
 /**
  * eficonfig_init() - do required initialization for eficonfig command
  *
@@ -1818,6 +1888,7 @@ static efi_status_t eficonfig_init(void)
 static const struct eficonfig_item maintenance_menu_items[] = {
        {"Add Boot Option", eficonfig_process_add_boot_option},
        {"Edit Boot Option", eficonfig_process_edit_boot_option},
+       {"Delete Boot Option", eficonfig_process_delete_boot_option},
        {"Quit", eficonfig_process_quit},
 };