97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/* extcmd.c - support extended command */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 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/mm.h>
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#include <grub/list.h>
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#include <grub/misc.h>
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#include <grub/extcmd.h>
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static grub_err_t
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grub_extcmd_dispatcher (struct grub_command *cmd,
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int argc, char **args)
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{
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int new_argc;
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char **new_args;
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struct grub_arg_option *parser;
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struct grub_arg_list *state;
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int maxargs = 0;
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grub_err_t ret;
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grub_extcmd_t ext;
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ext = cmd->data;
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parser = (struct grub_arg_option *) ext->options;
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while (parser && (parser++)->doc)
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maxargs++;
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/* Set up the option state. */
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state = grub_zalloc (sizeof (struct grub_arg_list) * maxargs);
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if (grub_arg_parse (ext, argc, args, state, &new_args, &new_argc))
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{
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ext->state = state;
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ret = (ext->func) (ext, new_argc, new_args);
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grub_free (new_args);
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}
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else
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ret = grub_errno;
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grub_free (state);
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return ret;
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}
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grub_extcmd_t
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grub_register_extcmd (const char *name, grub_extcmd_func_t func,
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unsigned flags, const char *summary,
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const char *description,
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const struct grub_arg_option *parser)
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{
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grub_extcmd_t ext;
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grub_command_t cmd;
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ext = (grub_extcmd_t) grub_malloc (sizeof (*ext));
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if (! ext)
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return 0;
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cmd = grub_register_command_prio (name, grub_extcmd_dispatcher,
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summary, description, 1);
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if (! cmd)
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{
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grub_free (ext);
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return 0;
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}
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cmd->flags = (flags | GRUB_COMMAND_FLAG_EXTCMD);
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cmd->data = ext;
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ext->cmd = cmd;
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ext->func = func;
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ext->options = parser;
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ext->data = 0;
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return ext;
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}
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void
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grub_unregister_extcmd (grub_extcmd_t ext)
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{
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grub_unregister_command (ext->cmd);
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grub_free (ext);
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}
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