From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Fedora Ninjas <grub2-owner@fedoraproject.org>
Date: Tue, 22 Jan 2013 06:31:38 +0100
Subject: [PATCH] blscfg: add blscfg module to parse Boot Loader Specification
snippets
http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec
Works like this:
insmod blscfg
bls_import
Done! You should now have menu items for your snippets in place.
Signed-off-by: Peter Jones <grub2-owner@fedoraproject.org>
---
grub-core/Makefile.core.def | 8 ++
grub-core/commands/blscfg.c | 201 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 209 insertions(+)
create mode 100644 grub-core/commands/blscfg.c
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index ec46506e39e..7bf1c8a5880 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -746,6 +746,14 @@ module = {
common = commands/blocklist.c;
};
+module = {
+ name = blscfg;
+ common = commands/blscfg.c;
+ enable = i386_efi;
+ enable = x86_64_efi;
+ enable = i386_pc;
+};
+
module = {
name = boot;
common = commands/boot.c;
diff --git a/grub-core/commands/blscfg.c b/grub-core/commands/blscfg.c
new file mode 100644
index 00000000000..4274aca5a9d
--- /dev/null
+++ b/grub-core/commands/blscfg.c
@@ -0,0 +1,201 @@
+/*-*- Mode: C; c-basic-offset: 2; indent-tabs-mode: t -*-*/
+
+/* bls.c - implementation of the boot loader spec */
+
+/*
+ * GRUB -- GRand Unified Bootloader
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/extcmd.h>
+#include <grub/i18n.h>
+#include <grub/fs.h>
+#include <grub/env.h>
+#include <grub/file.h>
+#include <grub/normal.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#ifdef GRUB_MACHINE_EFI
+#define GRUB_LINUX_CMD "linuxefi"
+#define GRUB_INITRD_CMD "initrdefi"
+#define GRUB_BLS_CONFIG_PATH "/EFI/fedora/loader/entries/"
+#define GRUB_BOOT_DEVICE "($boot)"
+#else
+#define GRUB_LINUX_CMD "linux"
+#define GRUB_INITRD_CMD "initrd"
+#define GRUB_BLS_CONFIG_PATH "/loader/entries/"
+#define GRUB_BOOT_DEVICE "($root)"
+#endif
+
+static int parse_entry (
+ const char *filename,
+ const struct grub_dirhook_info *info __attribute__ ((unused)),
+ void *data __attribute__ ((unused)))
+{
+ grub_size_t n;
+ char *p;
+ grub_file_t f = NULL;
+ grub_off_t sz;
+ char *title = NULL, *options = NULL, *clinux = NULL, *initrd = NULL, *src = NULL;
+ const char *args[2] = { NULL, NULL };
+
+ if (filename[0] == '.')
+ return 0;
+
+ n = grub_strlen (filename);
+ if (n <= 5)
+ return 0;
+
+ if (grub_strcmp (filename + n - 5, ".conf") != 0)
+ return 0;
+
+ p = grub_xasprintf (GRUB_BLS_CONFIG_PATH "%s", filename);
+
+ f = grub_file_open (p);
+ if (!f)
+ goto finish;
+
+ sz = grub_file_size (f);
+ if (sz == GRUB_FILE_SIZE_UNKNOWN || sz > 1024*1024)
+ goto finish;
+
+ for (;;)
+ {
+ char *buf;
+
+ buf = grub_file_getline (f);
+ if (!buf)
+ break;
+
+ if (grub_strncmp (buf, "title ", 6) == 0)
+ {
+ grub_free (title);
+ title = grub_strdup (buf + 6);
+ if (!title)
+ goto finish;
+ }
+ else if (grub_strncmp (buf, "options ", 8) == 0)
+ {
+ grub_free (options);
+ options = grub_strdup (buf + 8);
+ if (!options)
+ goto finish;
+ }
+ else if (grub_strncmp (buf, "linux ", 6) == 0)
+ {
+ grub_free (clinux);
+ clinux = grub_strdup (buf + 6);
+ if (!clinux)
+ goto finish;
+ }
+ else if (grub_strncmp (buf, "initrd ", 7) == 0)
+ {
+ grub_free (initrd);
+ initrd = grub_strdup (buf + 7);
+ if (!initrd)
+ goto finish;
+ }
+
+ grub_free(buf);
+ }
+
+ if (!linux)
+ {
+ grub_printf ("Skipping file %s with no 'linux' key.", p);
+ goto finish;
+ }
+
+ args[0] = title ? title : filename;
+
+ src = grub_xasprintf ("load_video\n"
+ "set gfx_payload=keep\n"
+ "insmod gzio\n"
+ GRUB_LINUX_CMD " %s%s%s%s\n"
+ "%s%s%s%s",
+ GRUB_BOOT_DEVICE, clinux, options ? " " : "", options ? options : "",
+ initrd ? GRUB_INITRD_CMD " " : "", initrd ? GRUB_BOOT_DEVICE : "", initrd ? initrd : "", initrd ? "\n" : "");
+
+ grub_normal_add_menu_entry (1, args, NULL, NULL, "bls", NULL, NULL, src, 0);
+
+finish:
+ grub_free (p);
+ grub_free (title);
+ grub_free (options);
+ grub_free (clinux);
+ grub_free (initrd);
+ grub_free (src);
+
+ if (f)
+ grub_file_close (f);
+
+ return 0;
+}
+
+static grub_err_t
+grub_cmd_bls_import (grub_extcmd_context_t ctxt __attribute__ ((unused)),
+ int argc __attribute__ ((unused)),
+ char **args __attribute__ ((unused)))
+{
+ grub_fs_t fs;
+ grub_device_t dev;
+ static grub_err_t r;
+ const char *devid;
+
+ devid = grub_env_get ("root");
+ if (!devid)
+ return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("variable `%s' isn't set"), "root");
+
+ dev = grub_device_open (devid);
+ if (!dev)
+ return grub_errno;
+
+ fs = grub_fs_probe (dev);
+ if (!fs)
+ {
+ r = grub_errno;
+ goto finish;
+ }
+
+ r = fs->dir (dev, GRUB_BLS_CONFIG_PATH, parse_entry, NULL);
+
+finish:
+ if (dev)
+ grub_device_close (dev);
+
+ return r;
+}
+
+static grub_extcmd_t cmd;
+
+GRUB_MOD_INIT(bls)
+{
+ cmd = grub_register_extcmd ("bls_import",
+ grub_cmd_bls_import,
+ 0,
+ NULL,
+ N_("Import Boot Loader Specification snippets."),
+ NULL);
+}
+
+GRUB_MOD_FINI(bls)
+{
+ grub_unregister_extcmd (cmd);
+}