Description: Add grub-mount utility
Author: Vladimir Serbinenko <phcoder@gmail.com>
Origin: upstream, http://bzr.sv.gnu.org/r/grub/branches/fuse/
Forwarded: http://lists.gnu.org/archive/html/grub-devel/2011-01/msg00056.html
Last-Update: 2011-07-10
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -216,6 +216,21 @@
};
program = {
+ name = grub-mount;
+ mansection = 1;
+ common_nodist = grub_fstest_init.c;
+ common = util/grub-mount.c;
+ common = grub-core/kern/emu/hostfs.c;
+ common = grub-core/disk/host.c;
+
+ ldadd = libgrubmods.a;
+ ldadd = libgrubkern.a;
+ ldadd = grub-core/gnulib/libgnu.a;
+ ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBZFS) $(LIBNVPAIR) -lfuse';
+ condition = COND_GRUB_MOUNT;
+};
+
+program = {
name = grub-mkfont;
mansection = 1;
common = util/grub-mkfont.c;
--- a/configure.ac
+++ b/configure.ac
@@ -856,6 +856,37 @@
AC_SUBST([freetype_cflags])
AC_SUBST([freetype_libs])
+AC_ARG_ENABLE([grub-mount],
+ [AS_HELP_STRING([--enable-grub-mount],
+ [build and install the `grub-mount' utility (default=guessed)])])
+if test x"$enable_grub_mount" = xno ; then
+ grub_mount_excuse="explicitly disabled"
+fi
+
+if test x"$grub_mount_excuse" = x ; then
+ AC_CHECK_LIB([fuse], [fuse_main_real], [],
+ [grub_mount_excuse="need FUSE library"])
+fi
+
+if test x"$grub_mount_excuse" = x ; then
+ # Check for fuse headers.
+ SAVED_CPPFLAGS="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=26"
+ AC_CHECK_HEADERS([fuse/fuse.h], [],
+ [grub_mount_excuse=["need FUSE headers"]])
+ CPPFLAGS="$SAVED_CPPFLAGS"
+fi
+
+if test x"$enable_grub_mount" = xyes && test x"$grub_mount_excuse" != x ; then
+ AC_MSG_ERROR([grub-mount was explicitly requested but can't be compiled])
+fi
+if test x"$grub_mount_excuse" = x ; then
+enable_grub_mount=yes
+else
+enable_grub_mount=no
+fi
+AC_SUBST([enable_grub_mount])
+
AC_ARG_ENABLE([device-mapper],
[AS_HELP_STRING([--enable-device-mapper],
[enable Linux device-mapper support (default=guessed)])])
@@ -967,6 +998,7 @@
AM_CONDITIONAL([COND_GRUB_EMU_SDL], [test x$enable_grub_emu_sdl = xyes])
AM_CONDITIONAL([COND_GRUB_EMU_PCI], [test x$enable_grub_emu_pci = xyes])
AM_CONDITIONAL([COND_GRUB_MKFONT], [test x$enable_grub_mkfont = xyes])
+AM_CONDITIONAL([COND_GRUB_MOUNT], [test x$enable_grub_mount = xyes])
AM_CONDITIONAL([COND_HAVE_FONT_SOURCE], [test x$FONT_SOURCE != x])
AM_CONDITIONAL([COND_GRUB_PE2ELF], [test x$TARGET_OBJ2ELF != x])
AM_CONDITIONAL([COND_APPLE_CC], [test x$TARGET_APPLE_CC = x1])
@@ -1043,5 +1075,10 @@
else
echo grub-mkfont: No "($grub_mkfont_excuse)"
fi
+if [ x"$grub_mount_excuse" = x ]; then
+echo grub-mount: Yes
+else
+echo grub-mount: No "($grub_mount_excuse)"
+fi
echo "*******************************************************"
]
--- /dev/null
+++ b/docs/man/grub-mount.h2m
@@ -0,0 +1,2 @@
+[NAME]
+grub-mount \- export GRUB filesystem with FUSE
--- /dev/null
+++ b/util/grub-mount.c
@@ -0,0 +1,508 @@
+/* grub-mount.c - FUSE driver for filesystems that GRUB understands */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2008,2009,2010 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/>.
+ */
+#define FUSE_USE_VERSION 26
+#include <config.h>
+#include <grub/types.h>
+#include <grub/emu/misc.h>
+#include <grub/util/misc.h>
+#include <grub/misc.h>
+#include <grub/device.h>
+#include <grub/disk.h>
+#include <grub/file.h>
+#include <grub/fs.h>
+#include <grub/env.h>
+#include <grub/term.h>
+#include <grub/mm.h>
+#include <grub/lib/hexdump.h>
+#include <grub/crypto.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+#include <fuse/fuse.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "progname.h"
+#include "argp.h"
+
+static char *root = NULL;
+grub_device_t dev = NULL;
+grub_fs_t fs = NULL;
+static char **images = NULL;
+static char *debug_str = NULL;
+static char **fuse_args = NULL;
+static int fuse_argc = 0;
+static int num_disks = 0;
+
+static grub_err_t
+execute_command (char *name, int n, char **args)
+{
+ grub_command_t cmd;
+
+ cmd = grub_command_find (name);
+ if (! cmd)
+ grub_util_error (_("can\'t find command %s"), name);
+
+ return (cmd->func) (cmd, n, args);
+}
+
+/* Translate GRUB error numbers into OS error numbers. Print any unexpected
+ errors. */
+static int
+translate_error (void)
+{
+ int ret;
+
+ switch (grub_errno)
+ {
+ case GRUB_ERR_NONE:
+ ret = 0;
+ break;
+
+ case GRUB_ERR_OUT_OF_MEMORY:
+ grub_print_error ();
+ ret = -ENOMEM;
+ break;
+
+ case GRUB_ERR_BAD_FILE_TYPE:
+ /* This could also be EISDIR. Take a guess. */
+ ret = -ENOTDIR;
+ break;
+
+ case GRUB_ERR_FILE_NOT_FOUND:
+ ret = -ENOENT;
+ break;
+
+ case GRUB_ERR_FILE_READ_ERROR:
+ case GRUB_ERR_READ_ERROR:
+ case GRUB_ERR_IO:
+ grub_print_error ();
+ ret = -EIO;
+ break;
+
+ case GRUB_ERR_SYMLINK_LOOP:
+ ret = -ELOOP;
+ break;
+
+ default:
+ grub_print_error ();
+ ret = -EINVAL;
+ break;
+ }
+
+ /* Any previous errors were handled. */
+ grub_errno = GRUB_ERR_NONE;
+
+ return ret;
+}
+
+static int
+fuse_getattr (const char *path, struct stat *st)
+{
+ char *filename, *pathname, *path2;
+ const char *pathname_t;
+ struct grub_dirhook_info file_info;
+ int file_exists = 0;
+
+ /* A hook for iterating directories. */
+ auto int find_file (const char *cur_filename,
+ const struct grub_dirhook_info *info);
+ int find_file (const char *cur_filename,
+ const struct grub_dirhook_info *info)
+ {
+ if ((info->case_insensitive ? grub_strcasecmp (cur_filename, filename)
+ : grub_strcmp (cur_filename, filename)) == 0)
+ {
+ file_info = *info;
+ file_exists = 1;
+ return 1;
+ }
+ return 0;
+ }
+
+ if (path[0] == '/' && path[1] == 0)
+ {
+ st->st_dev = 0;
+ st->st_ino = 0;
+ st->st_mode = 0555 | S_IFDIR;
+ st->st_uid = 0;
+ st->st_gid = 0;
+ st->st_rdev = 0;
+ st->st_size = 0;
+ st->st_blksize = 512;
+ st->st_blocks = (st->st_blksize + 511) >> 9;
+ st->st_atime = st->st_mtime = st->st_ctime = 0;
+ return 0;
+ }
+
+ file_exists = 0;
+
+ pathname_t = grub_strchr (path, ')');
+ if (! pathname_t)
+ pathname_t = path;
+ else
+ pathname_t++;
+ pathname = xstrdup (pathname_t);
+
+ /* Remove trailing '/'. */
+ while (*pathname && pathname[grub_strlen (pathname) - 1] == '/')
+ pathname[grub_strlen (pathname) - 1] = 0;
+
+ /* Split into path and filename. */
+ filename = grub_strrchr (pathname, '/');
+ if (! filename)
+ {
+ path2 = grub_strdup ("/");
+ filename = pathname;
+ }
+ else
+ {
+ filename++;
+ path2 = grub_strdup (pathname);
+ path2[filename - pathname] = 0;
+ }
+
+ /* It's the whole device. */
+ (fs->dir) (dev, path2, find_file);
+
+ grub_free (path2);
+ if (!file_exists)
+ {
+ grub_errno = GRUB_ERR_NONE;
+ return -ENOENT;
+ }
+ st->st_dev = 0;
+ st->st_ino = 0;
+ st->st_mode = file_info.dir ? (0555 | S_IFDIR) : (0444 | S_IFREG);
+ st->st_uid = 0;
+ st->st_gid = 0;
+ st->st_rdev = 0;
+ if (!file_info.dir)
+ {
+ grub_file_t file;
+ file = grub_file_open (path);
+ if (! file)
+ return translate_error ();
+ st->st_size = file->size;
+ grub_file_close (file);
+ }
+ else
+ st->st_size = 0;
+ st->st_blksize = 512;
+ st->st_blocks = (st->st_size + 511) >> 9;
+ st->st_atime = st->st_mtime = st->st_ctime = file_info.mtimeset
+ ? file_info.mtime : 0;
+ grub_errno = GRUB_ERR_NONE;
+ return 0;
+}
+
+static int
+fuse_opendir (const char *path, struct fuse_file_info *fi)
+{
+ return 0;
+}
+
+/* FIXME */
+static grub_file_t files[65536];
+static int first_fd = 1;
+
+static int
+fuse_open (const char *path, struct fuse_file_info *fi __attribute__ ((unused)))
+{
+ grub_file_t file;
+ file = grub_file_open (path);
+ if (! file)
+ return translate_error ();
+ files[first_fd++] = file;
+ fi->fh = first_fd;
+ files[first_fd++] = file;
+ grub_errno = GRUB_ERR_NONE;
+ return 0;
+}
+
+static int
+fuse_read (const char *path, char *buf, size_t sz, off_t off,
+ struct fuse_file_info *fi)
+{
+ grub_file_t file = files[fi->fh];
+ grub_ssize_t size;
+
+ if (off > file->size)
+ return -EINVAL;
+
+ file->offset = off;
+
+ size = grub_file_read (file, buf, sz);
+ if (size < 0)
+ return translate_error ();
+ else
+ {
+ grub_errno = GRUB_ERR_NONE;
+ return size;
+ }
+}
+
+static int
+fuse_release (const char *path, struct fuse_file_info *fi)
+{
+ grub_file_close (files[fi->fh]);
+ files[fi->fh] = NULL;
+ grub_errno = GRUB_ERR_NONE;
+ return 0;
+}
+
+static int
+fuse_readdir (const char *path, void *buf,
+ fuse_fill_dir_t fill, off_t off, struct fuse_file_info *fi)
+{
+ char *pathname;
+
+ auto int call_fill (const char *filename,
+ const struct grub_dirhook_info *info);
+ int call_fill (const char *filename, const struct grub_dirhook_info *info)
+ {
+ fill (buf, filename, NULL, 0);
+ return 0;
+ }
+
+ pathname = xstrdup (path);
+
+ /* Remove trailing '/'. */
+ while (pathname [0] && pathname[1]
+ && pathname[grub_strlen (pathname) - 1] == '/')
+ pathname[grub_strlen (pathname) - 1] = 0;
+
+ (fs->dir) (dev, pathname, call_fill);
+ free (pathname);
+ grub_errno = GRUB_ERR_NONE;
+ return 0;
+}
+
+struct fuse_operations grub_opers = {
+ .getattr = fuse_getattr,
+ .open = fuse_open,
+ .release = fuse_release,
+ .opendir = fuse_opendir,
+ .readdir = fuse_readdir,
+ .read = fuse_read
+};
+
+static grub_err_t
+fuse_init (void)
+{
+ int i;
+
+ for (i = 0; i < num_disks; i++)
+ {
+ char *argv[2];
+ char *host_file;
+ char *loop_name;
+ loop_name = grub_xasprintf ("loop%d", i);
+ if (!loop_name)
+ grub_util_error (grub_errmsg);
+
+ host_file = grub_xasprintf ("(host)%s", images[i]);
+ if (!host_file)
+ grub_util_error (grub_errmsg);
+
+ argv[0] = loop_name;
+ argv[1] = host_file;
+
+ if (execute_command ("loopback", 2, argv))
+ grub_util_error (_("loopback command fails"));
+
+ grub_free (loop_name);
+ grub_free (host_file);
+ }
+
+ grub_lvm_fini ();
+ grub_mdraid09_fini ();
+ grub_mdraid1x_fini ();
+ grub_raid_fini ();
+ grub_raid_init ();
+ grub_mdraid09_init ();
+ grub_mdraid1x_init ();
+ grub_lvm_init ();
+
+ dev = grub_device_open (0);
+ if (! dev)
+ return grub_errno;
+
+ fs = grub_fs_probe (dev);
+ if (! fs)
+ {
+ grub_device_close (dev);
+ return grub_errno;
+ }
+
+ fuse_main (fuse_argc, fuse_args, &grub_opers, NULL);
+
+ for (i = 0; i < num_disks; i++)
+ {
+ char *argv[2];
+ char *loop_name;
+
+ loop_name = grub_xasprintf ("loop%d", i);
+ if (!loop_name)
+ grub_util_error (grub_errmsg);
+
+ argv[0] = "-d";
+ argv[1] = loop_name;
+
+ execute_command ("loopback", 2, argv);
+
+ grub_free (loop_name);
+ }
+
+ return GRUB_ERR_NONE;
+}
+
+static struct argp_option options[] = {
+ {"root", 'r', N_("DEVICE_NAME"), 0, N_("Set root device."), 2},
+ {"debug", 'd', "S", 0, N_("Set debug environment variable."), 2},
+ {"verbose", 'v', NULL, OPTION_ARG_OPTIONAL, N_("Print verbose messages."), 2},
+ {0, 0, 0, 0, 0, 0}
+};
+
+/* Print the version information. */
+static void
+print_version (FILE *stream, struct argp_state *state)
+{
+ fprintf (stream, "%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
+}
+void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
+
+error_t
+argp_parser (int key, char *arg, struct argp_state *state)
+{
+ char *p;
+
+ switch (key)
+ {
+ case 'r':
+ root = arg;
+ return 0;
+
+ case 'd':
+ debug_str = arg;
+ return 0;
+
+ case 'v':
+ verbosity++;
+ return 0;
+
+ case ARGP_KEY_ARG:
+ if (arg[0] != '-')
+ break;
+
+ default:
+ if (!arg)
+ return 0;
+
+ fuse_args = xrealloc (fuse_args, (fuse_argc + 1) * sizeof (fuse_args[0]));
+ fuse_args[fuse_argc] = xstrdup (arg);
+ fuse_argc++;
+ return 0;
+ }
+
+ if (arg[0] != '/')
+ {
+ fprintf (stderr, "%s", _("Must use absolute path.\n"));
+ argp_usage (state);
+ }
+ images = xrealloc (images, (num_disks + 1) * sizeof (images[0]));
+ images[num_disks] = xstrdup (arg);
+ num_disks++;
+
+ return 0;
+}
+
+struct argp argp = {
+ options, argp_parser, N_("IMAGE1 [IMAGE2 ...] MOUNTPOINT"),
+ N_("Debug tool for filesystem driver."),
+ NULL, NULL, NULL
+};
+
+int
+main (int argc, char *argv[])
+{
+ char *default_root, *alloc_root;
+
+ set_program_name (argv[0]);
+
+ grub_util_init_nls ();
+
+ fuse_args = xrealloc (fuse_args, (fuse_argc + 2) * sizeof (fuse_args[0]));
+ fuse_args[fuse_argc] = xstrdup (argv[0]);
+ fuse_argc++;
+ /* Run single-threaded. */
+ fuse_args[fuse_argc] = xstrdup ("-s");
+ fuse_argc++;
+
+ argp_parse (&argp, argc, argv, 0, 0, 0);
+
+ if (num_disks < 2)
+ grub_util_error ("need an image and mountpoint");
+ fuse_args = xrealloc (fuse_args, (fuse_argc + 2) * sizeof (fuse_args[0]));
+ fuse_args[fuse_argc] = images[num_disks - 1];
+ fuse_argc++;
+ num_disks--;
+ fuse_args[fuse_argc] = NULL;
+
+ /* Initialize all modules. */
+ grub_init_all ();
+
+ if (debug_str)
+ grub_env_set ("debug", debug_str);
+
+ default_root = (num_disks == 1) ? "loop0" : "md0";
+ alloc_root = 0;
+ if (root)
+ {
+ if ((*root >= '0') && (*root <= '9'))
+ {
+ alloc_root = xmalloc (strlen (default_root) + strlen (root) + 2);
+
+ sprintf (alloc_root, "%s,%s", default_root, root);
+ root = alloc_root;
+ }
+ }
+ else
+ root = default_root;
+
+ grub_env_set ("root", root);
+
+ if (alloc_root)
+ free (alloc_root);
+
+ /* Do it. */
+ fuse_init ();
+ if (grub_errno)
+ {
+ grub_print_error ();
+ return 1;
+ }
+
+ /* Free resources. */
+ grub_fini_all ();
+
+ return 0;
+}