Move OS-dependent files to grub-core/osdep and document it.

grub-core/osdep/bsd/getroot.c

@@ -0,0 +1,199 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011,2012,2013  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-util.h>
+#include <config.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <dirent.h>
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#include <grub/types.h>
+
+#include <grub/util/misc.h>
+#include <grub/util/lvm.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/emu/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/emu/getroot.h>
+
+#include <sys/wait.h>
+
+# include <sys/ioctl.h>
+# include <sys/disklabel.h>    /* struct disklabel */
+# include <sys/disk.h>    /* struct dkwedge_info */
+# ifdef HAVE_GETRAWPARTITION
+#  include <util.h>    /* getrawpartition */
+# endif /* HAVE_GETRAWPARTITION */
+#if defined(__NetBSD__)
+# include <sys/fdio.h>
+#endif
+#if defined(__OpenBSD__)
+# include <sys/dkio.h>
+#endif
+
+char *
+grub_util_part_to_disk (const char *os_dev, struct stat *st,
+			int *is_part)
+{
+  int rawpart = -1;
+# ifdef HAVE_GETRAWPARTITION
+  rawpart = getrawpartition();
+# endif /* HAVE_GETRAWPARTITION */
+  if (rawpart < 0)
+    return xstrdup (os_dev);
+
+#if defined(__NetBSD__)
+  /* NetBSD disk wedges are of the form "/dev/rdk.*".  */
+  if (strncmp ("/dev/rdk", os_dev, sizeof("/dev/rdk") - 1) == 0)
+    {
+      struct dkwedge_info dkw;
+      int fd;
+
+      fd = open (os_dev, O_RDONLY);
+      if (fd == -1)
+	{
+	  grub_error (GRUB_ERR_BAD_DEVICE,
+		      N_("cannot open `%s': %s"), os_dev,
+		      strerror (errno));
+	  return xstrdup (os_dev);
+	}
+      /* We don't call configure_device_driver since this isn't a floppy device name.  */
+      if (ioctl (fd, DIOCGWEDGEINFO, &dkw) == -1)
+	{
+	  grub_error (GRUB_ERR_BAD_DEVICE,
+		      "cannot get disk wedge info of `%s'", os_dev);
+	  close (fd);
+	  return xstrdup (os_dev);
+	}
+      *is_part = (dkw.dkw_offset != 0);
+      close (fd);
+      return xasprintf ("/dev/r%s%c", dkw.dkw_parent, 'a' + rawpart);
+    }
+#endif
+
+  /* NetBSD (disk label) partitions are of the form "/dev/r[a-z]+[0-9][a-z]".  */
+  if (strncmp ("/dev/r", os_dev, sizeof("/dev/r") - 1) == 0 &&
+      (os_dev[sizeof("/dev/r") - 1] >= 'a' && os_dev[sizeof("/dev/r") - 1] <= 'z') &&
+      strncmp ("fd", os_dev + sizeof("/dev/r") - 1, sizeof("fd") - 1) != 0)    /* not a floppy device name */
+    {
+      char *path = xstrdup (os_dev);
+      char *p;
+      for (p = path + sizeof("/dev/r"); *p >= 'a' && *p <= 'z'; p++);
+      if (grub_isdigit(*p))
+	{
+	  p++;
+	  if ((*p >= 'a' && *p <= 'z') && (*(p+1) == '\0'))
+	    {
+	      if (*p != 'a' + rawpart)
+		*is_part = 1;
+	      /* path matches the required regular expression and
+		 p points to its last character.  */
+	      *p = 'a' + rawpart;
+	    }
+	}
+      return path;
+    }
+
+  return xstrdup (os_dev);
+}
+
+enum grub_dev_abstraction_types
+grub_util_get_dev_abstraction_os (const char *os_dev __attribute__((unused)))
+{
+  return GRUB_DEV_ABSTRACTION_NONE;
+}
+
+int
+grub_util_pull_device_os (const char *os_dev __attribute__ ((unused)),
+			  enum grub_dev_abstraction_types ab __attribute__ ((unused)))
+{
+  return 0;
+}
+
+char *
+grub_util_get_grub_dev_os (const char *os_dev __attribute__ ((unused)))
+{
+  return NULL;
+}
+
+
+grub_disk_addr_t
+grub_util_find_partition_start_os (const char *dev)
+{
+  int fd;
+#  if defined(__NetBSD__)
+  struct dkwedge_info dkw;
+#  endif /* defined(__NetBSD__) */
+  struct disklabel label;
+  int p_index;
+
+  fd = open (dev, O_RDONLY);
+  if (fd == -1)
+    {
+      grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot open `%s': %s"),
+		  dev, strerror (errno));
+      return 0;
+    }
+
+#  if defined(__NetBSD__)
+  configure_device_driver (fd);
+  /* First handle the case of disk wedges.  */
+  if (ioctl (fd, DIOCGWEDGEINFO, &dkw) == 0)
+    {
+      close (fd);
+      return (grub_disk_addr_t) dkw.dkw_offset;
+    }
+#  endif /* defined(__NetBSD__) */
+
+  if (ioctl (fd, DIOCGDINFO, &label) == -1)
+    {
+      grub_error (GRUB_ERR_BAD_DEVICE,
+		  "cannot get disk label of `%s'", dev);
+      close (fd);
+      return 0;
+    }
+
+  close (fd);
+
+  if (dev[0])
+    p_index = dev[strlen(dev) - 1] - 'a';
+  else
+    p_index = -1;
+  
+  if (p_index >= label.d_npartitions || p_index < 0)
+    {
+      grub_error (GRUB_ERR_BAD_DEVICE,
+		  "no disk label entry for `%s'", dev);
+      return 0;
+    }
+  return (grub_disk_addr_t) label.d_partitions[p_index].p_offset;
+}