Rewrite grub-install, grub-mkrescue, grub-mkstandalone and grub-mknetdir

the function of these files exceeds what can be sanely handled in shell
	in posix-comaptible way. Also writing it in C extends the functionality
	to non-UNIX-like OS and minimal environments.

grub-core/osdep/aros/config.c

@@ -0,0 +1,94 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004,2006,2007,2008,2009,2010,2011,2012,2013  Free Software Foundation, Inc.
+ *
+ *  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 <config.h>
+#include <config-util.h>
+
+#include <grub/emu/hostdisk.h>
+#include <grub/emu/exec.h>
+#include <grub/emu/config.h>
+#include <grub/util/install.h>
+#include <grub/util/misc.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <stdlib.h>
+
+const char *
+grub_util_get_config_filename (void)
+{
+  static char *value = NULL;
+  if (!value)
+    value = grub_util_path_concat (3, GRUB_SYSCONFDIR,
+				   "default", "grub");
+  return value;
+}
+
+const char *
+grub_util_get_pkgdatadir (void)
+{
+  const char *ret = getenv ("pkgdatadir");
+  if (ret)
+    return ret;
+  return GRUB_DATADIR "/" PACKAGE;
+}
+
+const char *
+grub_util_get_pkglibdir (void)
+{
+  return GRUB_LIBDIR "/" PACKAGE;
+}
+
+const char *
+grub_util_get_localedir (void)
+{
+  return LOCALEDIR;
+}
+
+void
+grub_util_load_config (struct grub_util_config *cfg)
+{
+  const char *cfgfile;
+  FILE *f = NULL;
+  const char *v;
+
+  memset (cfg, 0, sizeof (*cfg));
+
+  v = getenv ("GRUB_ENABLE_CRYPTODISK");
+  if (v && v[0] == 'y' && v[1] == '\0')
+    cfg->is_cryptodisk_enabled = 1;
+
+  v = getenv ("GRUB_DISTRIBUTOR");
+  if (v)
+    cfg->grub_distributor = xstrdup (v);
+
+  cfgfile = grub_util_get_config_filename ();
+  if (!grub_util_is_regular (cfgfile))
+    return;
+
+  f = grub_util_fopen (cfgfile, "r");
+  if (f)
+    {
+      grub_util_parse_config (f, cfg, 0);
+      fclose (f);
+    }
+  else
+    grub_util_warn (_("cannot open config file `%s': %s"),
+		    cfgfile, strerror (errno));
+}

grub-core/osdep/aros/hostdisk.c

@@ -41,6 +41,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <limits.h>
+#include <time.h>
 
 #include <string.h>
 #include <dos/dos.h>
@@ -516,6 +517,17 @@ grub_util_is_directory (const char *path)
   return S_ISDIR (st.st_mode);
 }
 
+int
+grub_util_is_regular (const char *path)
+{
+  struct stat st;
+
+  if (stat (path, &st) == -1)
+    return 0;
+
+  return S_ISREG (st.st_mode);
+}
+
 int
 grub_util_is_special_file (const char *path)
 {
@@ -525,3 +537,53 @@ grub_util_is_special_file (const char *path)
     return 1;
   return (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode));
 }
+
+static char *
+get_temp_name (void)
+{
+  static int ctr = 0;
+  char *t;
+  struct stat st;
+  
+  while (1)
+    {
+      t = xasprintf ("T:grub.%d.%d.%d.%d", (int) getpid (), (int) getppid (),
+		     ctr++, time (0));
+      if (stat (t, &st) == -1)
+	return t;
+      free (t);
+    }
+}
+
+char *
+grub_util_make_temporary_file (void)
+{
+  char *ret = get_temp_name ();
+  FILE *f;
+
+  f = grub_util_fopen (ret, "wb");
+  if (f)
+    fclose (f);
+  return ret;
+}
+
+char *
+grub_util_make_temporary_dir (void)
+{
+  char *ret = get_temp_name ();
+
+  grub_util_mkdir (ret);
+
+  return ret;
+}
+
+grub_uint32_t
+grub_util_get_mtime (const char *path)
+{
+  struct stat st;
+
+  if (stat (path, &st) == -1)
+    return 0;
+
+  return st.st_mtime;
+}