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author | Colin Walters <walters@verbum.org> | 2013-09-15 18:07:34 -0400 |
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committer | Colin Walters <walters@verbum.org> | 2013-09-15 18:08:06 -0400 |
commit | 95f07d486adcb6bb12d8da0016066d8d8db205d6 (patch) | |
tree | daa82c941be51af075565664348f996e625fddde /src/libostree/ostree-bootloader-uboot.c | |
parent | 6f929ca5af114da00030bd83d8b100706d0eebef (diff) | |
download | ostree-95f07d486adcb6bb12d8da0016066d8d8db205d6.tar.gz |
libostree: Move a lot more sysroot API here
OstreeBootloader is temporarily public API.
Diffstat (limited to 'src/libostree/ostree-bootloader-uboot.c')
-rw-r--r-- | src/libostree/ostree-bootloader-uboot.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/libostree/ostree-bootloader-uboot.c b/src/libostree/ostree-bootloader-uboot.c new file mode 100644 index 00000000..5d711ef7 --- /dev/null +++ b/src/libostree/ostree-bootloader-uboot.c @@ -0,0 +1,180 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- + * + * Copyright (C) 2013 Collabora Ltd + * + * Based on ot-bootloader-syslinux.c by Colin Walters <walters@verbum.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation; either version 2 of the licence or (at + * your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General + * Public License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307, USA. + * + * Author: Javier Martinez Canillas <javier.martinez@collabora.co.uk> + */ + +#include "config.h" + +#include "ostree-sysroot-private.h" +#include "ostree-bootloader-uboot.h" +#include "otutil.h" +#include "libgsystem.h" + +#include <string.h> + +struct _OstreeBootloaderUboot +{ + GObject parent_instance; + + OstreeSysroot *sysroot; + GFile *config_path; +}; + +typedef GObjectClass OstreeBootloaderUbootClass; + +static void ostree_bootloader_uboot_bootloader_iface_init (OstreeBootloaderInterface *iface); +G_DEFINE_TYPE_WITH_CODE (OstreeBootloaderUboot, ostree_bootloader_uboot, G_TYPE_OBJECT, + G_IMPLEMENT_INTERFACE (OSTREE_TYPE_BOOTLOADER, ostree_bootloader_uboot_bootloader_iface_init)); + +static gboolean +ostree_bootloader_uboot_query (OstreeBootloader *bootloader) +{ + OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (bootloader); + + return g_file_query_file_type (self->config_path, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL) == G_FILE_TYPE_SYMBOLIC_LINK; +} + +static const char * +ostree_bootloader_uboot_get_name (OstreeBootloader *bootloader) +{ + return "U-Boot"; +} + +static gboolean +create_config_from_boot_loader_entries (OstreeBootloaderUboot *self, + int bootversion, + GPtrArray *new_lines, + GCancellable *cancellable, + GError **error) +{ + gs_unref_ptrarray GPtrArray *boot_loader_configs = NULL; + OstreeBootconfigParser *config; + const char *val; + + if (!_ostree_sysroot_read_boot_loader_configs (self->sysroot, bootversion, &boot_loader_configs, + cancellable, error)) + return FALSE; + + /* U-Boot doesn't support a menu so just pick the first one since the list is ordered */ + config = boot_loader_configs->pdata[0]; + + val = ostree_bootconfig_parser_get (config, "linux"); + if (!val) + { + g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, + "No \"linux\" key in bootloader config"); + return FALSE; + } + g_ptr_array_add (new_lines, g_strdup_printf ("kernel_image=%s", val)); + + val = ostree_bootconfig_parser_get (config, "initrd"); + if (val) + g_ptr_array_add (new_lines, g_strdup_printf ("ramdisk_image=%s", val)); + + val = ostree_bootconfig_parser_get (config, "options"); + if (val) + g_ptr_array_add (new_lines, g_strdup_printf ("bootargs=%s", val)); + + return TRUE; +} + +static gboolean +ostree_bootloader_uboot_write_config (OstreeBootloader *bootloader, + int bootversion, + GCancellable *cancellable, + GError **error) +{ + OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (bootloader); + gs_unref_object GFile *new_config_path = NULL; + gs_free char *config_contents = NULL; + gs_free char *new_config_contents = NULL; + gs_unref_ptrarray GPtrArray *new_lines = NULL; + + /* This should follow the symbolic link to the current bootversion. */ + config_contents = gs_file_load_contents_utf8 (self->config_path, cancellable, error); + if (!config_contents) + return FALSE; + + new_config_path = ot_gfile_resolve_path_printf (self->sysroot->path, "boot/loader.%d/uEnv.txt", + bootversion); + + new_lines = g_ptr_array_new_with_free_func (g_free); + + if (!create_config_from_boot_loader_entries (self, bootversion, new_lines, + cancellable, error)) + return FALSE; + + new_config_contents = _ostree_sysroot_join_lines (new_lines); + + if (strcmp (new_config_contents, config_contents) != 0) + { + if (!g_file_replace_contents (new_config_path, new_config_contents, + strlen (new_config_contents), + NULL, FALSE, G_FILE_CREATE_NONE, + NULL, cancellable, error)) + return FALSE; + g_print ("Saved new version of %s\n", gs_file_get_path_cached (self->config_path)); + } + + return TRUE; +} + +static void +ostree_bootloader_uboot_finalize (GObject *object) +{ + OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (object); + + g_clear_object (&self->sysroot); + g_clear_object (&self->config_path); + + G_OBJECT_CLASS (ostree_bootloader_uboot_parent_class)->finalize (object); +} + +void +ostree_bootloader_uboot_init (OstreeBootloaderUboot *self) +{ +} + +static void +ostree_bootloader_uboot_bootloader_iface_init (OstreeBootloaderInterface *iface) +{ + iface->query = ostree_bootloader_uboot_query; + iface->get_name = ostree_bootloader_uboot_get_name; + iface->write_config = ostree_bootloader_uboot_write_config; +} + +void +ostree_bootloader_uboot_class_init (OstreeBootloaderUbootClass *class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (class); + + object_class->finalize = ostree_bootloader_uboot_finalize; +} + +OstreeBootloaderUboot * +ostree_bootloader_uboot_new (OstreeSysroot *sysroot) +{ + OstreeBootloaderUboot *self = g_object_new (OSTREE_TYPE_BOOTLOADER_UBOOT, NULL); + self->sysroot = g_object_ref (sysroot); + self->config_path = g_file_resolve_relative_path (self->sysroot->path, "boot/uEnv.txt"); + return self; +} |