166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/* search.c - search devices based on a file or a filesystem label */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/normal.h>
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#include <grub/arg.h>
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#include <grub/device.h>
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#include <grub/file.h>
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#include <grub/env.h>
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static const struct grub_arg_option options[] =
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{
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{"file", 'f', 0, "search devices by a file (default)", 0, 0},
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{"label", 'l', 0, "search devices by a filesystem label", 0, 0},
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{"set", 's', GRUB_ARG_OPTION_OPTIONAL, "set a variable to the first device found", "VAR", ARG_TYPE_STRING},
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{0, 0, 0, 0, 0, 0}
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};
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static void
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search_label (const char *key, const char *var)
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{
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int count = 0;
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auto int iterate_device (const char *name);
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int iterate_device (const char *name)
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{
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grub_device_t dev;
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dev = grub_device_open (name);
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if (dev)
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{
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grub_fs_t fs;
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fs = grub_fs_probe (dev);
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if (fs && fs->label)
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{
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char *label;
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(fs->label) (dev, &label);
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if (grub_errno == GRUB_ERR_NONE && label)
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{
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if (grub_strcmp (label, key) == 0)
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{
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/* Found! */
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grub_printf (" %s", name);
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if (count++ == 0 && var)
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grub_env_set (var, name);
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}
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grub_free (label);
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}
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}
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grub_device_close (dev);
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}
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grub_errno = GRUB_ERR_NONE;
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return 0;
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}
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grub_device_iterate (iterate_device);
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if (count == 0)
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grub_error (GRUB_ERR_FILE_NOT_FOUND, "no such device: %s", key);
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}
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static void
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search_file (const char *key, const char *var)
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{
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int count = 0;
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char *buf = 0;
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auto int iterate_device (const char *name);
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int iterate_device (const char *name)
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{
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grub_size_t len;
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char *p;
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grub_file_t file;
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len = grub_strlen (name) + 2 + grub_strlen (key) + 1;
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p = grub_realloc (buf, len);
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if (! p)
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return 1;
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buf = p;
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grub_sprintf (buf, "(%s)%s", name, key);
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file = grub_file_open (buf);
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if (file)
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{
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/* Found! */
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grub_printf (" %s", name);
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if (count++ == 0 && var)
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grub_env_set (var, name);
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grub_file_close (file);
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}
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grub_errno = GRUB_ERR_NONE;
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return 0;
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}
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grub_device_iterate (iterate_device);
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grub_free (buf);
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if (grub_errno == GRUB_ERR_NONE && count == 0)
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grub_error (GRUB_ERR_FILE_NOT_FOUND, "no such device");
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}
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static grub_err_t
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grub_cmd_search (struct grub_arg_list *state, int argc, char **args)
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{
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const char *var = 0;
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if (argc == 0)
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return grub_error (GRUB_ERR_INVALID_COMMAND, "no argument specified");
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if (state[2].set)
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var = state[2].arg ? : "root";
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if (state[1].set)
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search_label (args[0], var);
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else
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search_file (args[0], var);
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return grub_errno;
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}
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GRUB_MOD_INIT(search)
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{
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(void) mod; /* To stop warning. */
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grub_register_command ("search", grub_cmd_search, GRUB_COMMAND_FLAG_BOTH,
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"search [-f|-l|-s] NAME",
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"Search devices by a file or a filesystem label."
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" If --set is specified, the first device found is"
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" set to a variable. If no variable name is"
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" specified, \"root\" is used.",
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options);
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}
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GRUB_MOD_FINI(search)
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{
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grub_unregister_command ("search");
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}
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