183 lines
3.8 KiB
C
183 lines
3.8 KiB
C
/* dyncmd.c - support dynamic command */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2009 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 <grub/dl.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/env.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/command.h>
|
|
#include <grub/normal.h>
|
|
#include <grub/extcmd.h>
|
|
#include <grub/script_sh.h>
|
|
#include <grub/i18n.h>
|
|
|
|
static grub_err_t
|
|
grub_dyncmd_dispatcher (struct grub_extcmd_context *ctxt,
|
|
int argc, char **args)
|
|
{
|
|
char *modname;
|
|
grub_dl_t mod;
|
|
grub_err_t ret;
|
|
grub_extcmd_t extcmd = ctxt->extcmd;
|
|
grub_command_t cmd = extcmd->cmd;
|
|
|
|
modname = extcmd->data;
|
|
mod = grub_dl_load (modname);
|
|
if (mod)
|
|
{
|
|
char *name;
|
|
|
|
grub_free (modname);
|
|
grub_dl_ref (mod);
|
|
|
|
name = (char *) cmd->name;
|
|
grub_unregister_extcmd (extcmd);
|
|
|
|
cmd = grub_command_find (name);
|
|
if (cmd)
|
|
{
|
|
if (cmd->flags & GRUB_COMMAND_FLAG_BLOCKS &&
|
|
cmd->flags & GRUB_COMMAND_FLAG_EXTCMD)
|
|
ret = grub_extcmd_dispatcher (cmd, argc, args,
|
|
ctxt->script_params);
|
|
else
|
|
ret = (cmd->func) (cmd, argc, args);
|
|
}
|
|
else
|
|
ret = grub_errno;
|
|
|
|
grub_free (name);
|
|
}
|
|
else
|
|
ret = grub_errno;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Read the file command.lst for auto-loading. */
|
|
void
|
|
read_command_list (const char *prefix)
|
|
{
|
|
if (prefix)
|
|
{
|
|
char *filename;
|
|
|
|
filename = grub_xasprintf ("%s/command.lst", prefix);
|
|
if (filename)
|
|
{
|
|
grub_file_t file;
|
|
|
|
file = grub_file_open (filename);
|
|
if (file)
|
|
{
|
|
char *buf = NULL;
|
|
grub_command_t ptr, last = 0, next;
|
|
|
|
/* Override previous commands.lst. */
|
|
for (ptr = grub_command_list; ptr; ptr = next)
|
|
{
|
|
next = ptr->next;
|
|
if (ptr->flags & GRUB_COMMAND_FLAG_DYNCMD)
|
|
{
|
|
if (last)
|
|
last->next = ptr->next;
|
|
else
|
|
grub_command_list = ptr->next;
|
|
grub_free (ptr);
|
|
grub_free (ptr->data); /* extcmd struct */
|
|
}
|
|
else
|
|
last = ptr;
|
|
}
|
|
|
|
for (;; grub_free (buf))
|
|
{
|
|
char *p, *name, *modname;
|
|
grub_extcmd_t cmd;
|
|
int prio = 0;
|
|
|
|
buf = grub_file_getline (file);
|
|
|
|
if (! buf)
|
|
break;
|
|
|
|
name = buf;
|
|
if (*name == '*')
|
|
{
|
|
name++;
|
|
prio++;
|
|
}
|
|
|
|
if (! grub_isgraph (name[0]))
|
|
continue;
|
|
|
|
p = grub_strchr (name, ':');
|
|
if (! p)
|
|
continue;
|
|
|
|
*p = '\0';
|
|
while (*++p == ' ')
|
|
;
|
|
|
|
if (! grub_isgraph (*p))
|
|
continue;
|
|
|
|
if (grub_dl_get (p))
|
|
continue;
|
|
|
|
name = grub_strdup (name);
|
|
if (! name)
|
|
continue;
|
|
|
|
modname = grub_strdup (p);
|
|
if (! modname)
|
|
{
|
|
grub_free (name);
|
|
continue;
|
|
}
|
|
|
|
cmd = grub_register_extcmd_prio (name,
|
|
grub_dyncmd_dispatcher,
|
|
GRUB_COMMAND_FLAG_BLOCKS
|
|
| GRUB_COMMAND_FLAG_EXTCMD
|
|
| GRUB_COMMAND_FLAG_DYNCMD,
|
|
0, N_("not loaded"), 0,
|
|
prio);
|
|
if (! cmd)
|
|
{
|
|
grub_free (name);
|
|
grub_free (modname);
|
|
continue;
|
|
}
|
|
cmd->data = modname;
|
|
|
|
/* Update the active flag. */
|
|
grub_command_find (name);
|
|
}
|
|
|
|
grub_file_close (file);
|
|
}
|
|
|
|
grub_free (filename);
|
|
}
|
|
}
|
|
|
|
/* Ignore errors. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
}
|