From 4b0168249752a531ddedbdc3884bc675cd24033d 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 13/74] 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 a056b42..98b6485 100644

--- a/grub-core/Makefile.core.def

+++ b/grub-core/Makefile.core.def

@@ -733,6 +733,14 @@ module = {

 };

 module = {

+  name = blscfg;

+  common = commands/blscfg.c;

+  enable = i386_efi;

+  enable = x86_64_efi;

+  enable = i386_pc;

+};

+

+module = {

   name = boot;

   common = commands/boot.c;

   i386_pc = lib/i386/pc/biosnum.c;

diff --git a/grub-core/commands/blscfg.c b/grub-core/commands/blscfg.c

new file mode 100644

index 0000000..4274aca

--- /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);

+}

-- 

2.4.3