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/unix/platform.c

@@ -0,0 +1,213 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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 <grub/util/install.h>
+#include <grub/util/misc.h>
+#include <grub/misc.h>
+#include <grub/i18n.h>
+#include <grub/emu/exec.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+
+static char *
+get_ofpathname (const char *dev)
+{
+  char *ret = xmalloc (2 * PATH_MAX);
+  char *end = ret + 2 * PATH_MAX - 1;
+  int fd;
+  pid_t pid;
+  char *ptr = ret;
+
+  pid = grub_util_exec_pipe ((const char * []){ "ofpathname", dev, NULL }, &fd);
+  if (!pid)
+    goto fail;
+
+  FILE *fp = fdopen (fd, "r");
+  if (!fp)
+    goto fail;
+
+  while (!feof (fp) && ptr < end)
+    {
+      size_t r;
+      r = fread (ptr, 1, end - ptr, fp);
+      ptr += r;
+    }
+
+  fclose (fp);
+
+  return ret;
+
+ fail:
+  grub_util_error (_("couldn't find IEEE1275 device tree path for %s.\nYou will have to set `boot-device' variable manually"),
+		   dev);
+}
+
+static void
+grub_install_remove_efi_entries_by_distributor (const char *efi_distributor)
+{
+  int fd;
+  pid_t pid = grub_util_exec_pipe ((const char * []){ "efibootmgr", NULL }, &fd);
+  char *line = NULL;
+  size_t len = 0;
+
+  if (!pid)
+    {
+      grub_util_warn (_("Unable to open stream from %s: %s"),
+		      "efibootmgr", strerror (errno));
+      return;
+    }
+
+  FILE *fp = fdopen (fd, "r");
+  if (!fp)
+    {
+      grub_util_warn (_("Unable to open stream from %s: %s"),
+		      "efibootmgr", strerror (errno));
+      return;
+    }
+
+  line = xmalloc (80);
+  len = 80;
+  while (1)
+    {
+      int ret;
+      char *bootnum;
+      ret = getline (&line, &len, fp);
+      if (ret == -1)
+	break;
+      if (grub_memcmp (line, "Boot", sizeof ("Boot") - 1) != 0
+	  || line[sizeof ("Boot") - 1] < '0'
+	  || line[sizeof ("Boot") - 1] > '9')
+	continue;
+      if (!strcasestr (line, efi_distributor))
+	continue;
+      bootnum = line + sizeof ("Boot") - 1;
+      bootnum[4] = '\0';
+      if (!verbosity)
+	grub_util_exec ((const char * []){ "efibootmgr", "-q",
+	      "-b", bootnum,  "-B", NULL });
+      else
+	grub_util_exec ((const char * []){ "efibootmgr",
+	      "-b", bootnum, "-B", NULL });
+    }
+
+  free (line);
+}
+
+void
+grub_install_register_efi (const char *efidir_disk, int efidir_part,
+			   const char *efifile_path,
+			   const char *efi_distributor)
+{
+  if (grub_util_exec_redirect_null ((const char * []){ "efibootmgr", "--version", NULL }))
+    {
+      /* TRANSLATORS: This message is shown when required executable `%s'
+	 isn't found.  */
+      grub_util_error (_("%s: not found"), "efibootmgr");
+    }
+
+  /* On Linux, we need the efivars kernel modules.  */
+#ifdef __linux__
+  grub_util_exec ((const char * []){ "modprobe", "-q", "efivars", NULL });
+#endif
+  /* Delete old entries from the same distributor.  */
+  grub_install_remove_efi_entries_by_distributor (efi_distributor);
+
+  char *efidir_part_str = xasprintf ("%d", efidir_part);
+
+  if (!verbosity)
+    grub_util_exec ((const char * []){ "efibootmgr", "-q",
+	  "-c", "-d", efidir_disk,
+	  "-p", efidir_part_str, "-w",
+	  "-L", efi_distributor, "-l", 
+	  efifile_path, NULL });
+  else
+    grub_util_exec ((const char * []){ "efibootmgr",
+	  "-c", "-d", efidir_disk,
+	  "-p", efidir_part_str, "-w",
+	  "-L", efi_distributor, "-l", 
+	  efifile_path, NULL });
+  free (efidir_part_str);
+}
+
+void
+grub_install_register_ieee1275 (int is_prep, const char *install_device,
+				int partno, const char *relpath)
+{
+  char *boot_device;
+
+  if (grub_util_exec_redirect_null ((const char * []){ "ofpathname", "--version", NULL }))
+    {
+      /* TRANSLATORS: This message is shown when required executable `%s'
+	 isn't found.  */
+      grub_util_error (_("%s: not found"), "ofpathname");
+    }
+
+  /* Get the Open Firmware device tree path translation.  */
+  if (!is_prep)
+    {
+      char *ptr;
+      char *ofpath;
+      const char *iptr;
+
+      ofpath = get_ofpathname (install_device);
+      boot_device = xmalloc (strlen (ofpath) + 1
+			     + sizeof ("XXXXXXXXXXXXXXXXXXXX")
+			     + 1 + strlen (relpath) + 1);
+      ptr = grub_stpcpy (boot_device, ofpath);
+      *ptr++ = ':';
+      grub_snprintf (ptr, sizeof ("XXXXXXXXXXXXXXXXXXXX"), "%d",
+		     partno);
+      ptr += strlen (ptr);
+      *ptr++ = ',';
+      for (iptr = relpath; *iptr; iptr++, ptr++)
+	{
+	  if (*iptr == '/')
+	    *ptr = '\\';
+	  else
+	    *ptr = *iptr;
+	}
+      *ptr = '\0';
+    }
+  else
+    boot_device = get_ofpathname (install_device);
+
+  if (grub_util_exec ((const char * []){ "nvsetenv", "boot-device",
+	  boot_device, NULL }))
+    {
+      char *cmd = xasprintf ("setenv boot-device %s", boot_device);
+      grub_util_error ("`nvsetenv' failed. \nYou will have to set `boot-device' variable manually.  At the IEEE1275 prompt, type:\n  %s\n", 
+		       cmd);
+      free (cmd);
+    }
+
+  free (boot_device);
+}
+
+void
+grub_install_sgi_setup (const char *install_device,
+			const char *imgfile, const char *destname)
+{
+  grub_util_exec ((const char * []){ "dvhtool", "-d",
+	install_device, "--unix-to-vh", 
+	imgfile, destname, NULL });
+  grub_util_warn ("%s", _("You will have to set `SystemPartition' and `OSLoader' manually."));
+}