34f4a5b005
* normal/dyncmd.c (read_command_list): Replace `0' with `NULL'.
* normal/handler.c (read_handler_list): Likewise.
158 lines
3.2 KiB
C
158 lines
3.2 KiB
C
/* dyncmd.c - support dynamic 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/dl.h>
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#include <grub/mm.h>
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#include <grub/env.h>
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#include <grub/misc.h>
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#include <grub/command.h>
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#include <grub/normal.h>
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static grub_err_t
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grub_dyncmd_dispatcher (struct grub_command *cmd,
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int argc, char **args)
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{
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char *modname = cmd->data;
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grub_dl_t mod;
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grub_err_t ret;
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mod = grub_dl_load (modname);
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if (mod)
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{
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char *name;
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grub_free (modname);
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grub_dl_ref (mod);
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name = (char *) cmd->name;
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grub_unregister_command (cmd);
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cmd = grub_command_find (name);
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if (cmd)
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ret = (cmd->func) (cmd, argc, args);
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else
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ret = grub_errno;
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grub_free (name);
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}
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else
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ret = grub_errno;
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return ret;
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}
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/* Read the file command.lst for auto-loading. */
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void
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read_command_list (void)
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{
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const char *prefix;
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static int first_time = 1;
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/* Make sure that this function does not get executed twice. */
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if (! first_time)
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return;
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first_time = 0;
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prefix = grub_env_get ("prefix");
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if (prefix)
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{
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char *filename;
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filename = grub_malloc (grub_strlen (prefix) + sizeof ("/command.lst"));
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if (filename)
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{
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grub_file_t file;
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grub_sprintf (filename, "%s/command.lst", prefix);
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file = grub_file_open (filename);
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if (file)
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{
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char *buf = NULL;
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for (;; grub_free (buf))
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{
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char *p, *name, *modname;
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grub_command_t cmd;
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int prio = 0;
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buf = grub_file_getline (file);
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if (! buf)
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break;
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name = buf;
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if (*name == '*')
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{
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name++;
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prio++;
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}
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if (! grub_isgraph (name[0]))
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continue;
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p = grub_strchr (name, ':');
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if (! p)
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continue;
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*p = '\0';
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while (*++p == ' ')
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;
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if (! grub_isgraph (*p))
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continue;
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if (grub_dl_get (p))
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continue;
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name = grub_strdup (name);
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if (! name)
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continue;
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modname = grub_strdup (p);
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if (! modname)
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{
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grub_free (name);
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continue;
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}
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cmd = grub_register_command_prio (name,
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grub_dyncmd_dispatcher,
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0, "not loaded", prio);
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if (! cmd)
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{
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grub_free (name);
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grub_free (modname);
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continue;
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}
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cmd->flags |= GRUB_COMMAND_FLAG_DYNCMD;
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cmd->data = modname;
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/* Update the active flag. */
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grub_command_find (name);
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}
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grub_file_close (file);
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}
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grub_free (filename);
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}
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}
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/* Ignore errors. */
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grub_errno = GRUB_ERR_NONE;
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}
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