148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/* extcmd.c - support extended command */
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/*
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* VAS_EBOOT -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* VAS_EBOOT 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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* VAS_EBOOT 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 VAS_EBOOT. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <VasEBoot/mm.h>
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#include <VasEBoot/list.h>
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#include <VasEBoot/lockdown.h>
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#include <VasEBoot/misc.h>
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#include <VasEBoot/extcmd.h>
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#include <VasEBoot/script_sh.h>
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#include <VasEBoot/dl.h>
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VAS_EBOOT_MOD_LICENSE ("GPLv3+");
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VasEBoot_err_t
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VasEBoot_extcmd_dispatcher (struct VasEBoot_command *cmd, int argc, char **args,
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struct VasEBoot_script *script)
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{
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int new_argc;
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char **new_args;
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struct VasEBoot_arg_list *state;
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struct VasEBoot_extcmd_context context;
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VasEBoot_err_t ret;
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VasEBoot_extcmd_t ext = cmd->data;
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context.state = 0;
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context.extcmd = ext;
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context.script = script;
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if (! ext->options)
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{
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ret = (ext->func) (&context, argc, args);
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return ret;
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}
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state = VasEBoot_arg_list_alloc (ext, argc, args);
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if (state == NULL)
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return VasEBoot_errno;
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if (VasEBoot_arg_parse (ext, argc, args, state, &new_args, &new_argc))
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{
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context.state = state;
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ret = (ext->func) (&context, new_argc, new_args);
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VasEBoot_free (new_args);
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VasEBoot_free (state);
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return ret;
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}
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VasEBoot_free (state);
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return VasEBoot_errno;
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}
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static VasEBoot_err_t
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VasEBoot_extcmd_dispatch (struct VasEBoot_command *cmd, int argc, char **args)
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{
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return VasEBoot_extcmd_dispatcher (cmd, argc, args, 0);
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}
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VasEBoot_extcmd_t
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VasEBoot_register_extcmd_prio (const char *name, VasEBoot_extcmd_func_t func,
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VasEBoot_command_flags_t flags, const char *summary,
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const char *description,
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const struct VasEBoot_arg_option *parser,
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int prio)
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{
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VasEBoot_extcmd_t ext;
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VasEBoot_command_t cmd;
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ext = (VasEBoot_extcmd_t) VasEBoot_malloc (sizeof (*ext));
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if (! ext)
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return 0;
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cmd = VasEBoot_register_command_prio (name, VasEBoot_extcmd_dispatch,
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summary, description, prio);
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if (! cmd)
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{
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VasEBoot_free (ext);
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return 0;
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}
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cmd->flags = (flags | VAS_EBOOT_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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VasEBoot_extcmd_t
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VasEBoot_register_extcmd (const char *name, VasEBoot_extcmd_func_t func,
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VasEBoot_command_flags_t flags, const char *summary,
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const char *description,
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const struct VasEBoot_arg_option *parser)
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{
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return VasEBoot_register_extcmd_prio (name, func, flags,
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summary, description, parser, 1);
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}
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static VasEBoot_err_t
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VasEBoot_extcmd_lockdown (VasEBoot_extcmd_context_t ctxt __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char **argv __attribute__ ((unused)))
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{
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return VasEBoot_error (VAS_EBOOT_ERR_ACCESS_DENIED,
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N_("%s: the command is not allowed when lockdown is enforced"),
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ctxt->extcmd->cmd->name);
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}
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VasEBoot_extcmd_t
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VasEBoot_register_extcmd_lockdown (const char *name, VasEBoot_extcmd_func_t func,
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VasEBoot_command_flags_t flags, const char *summary,
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const char *description,
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const struct VasEBoot_arg_option *parser)
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{
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if (VasEBoot_is_lockdown () == VAS_EBOOT_LOCKDOWN_ENABLED)
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func = VasEBoot_extcmd_lockdown;
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return VasEBoot_register_extcmd (name, func, flags, summary, description, parser);
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}
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void
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VasEBoot_unregister_extcmd (VasEBoot_extcmd_t ext)
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{
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if (ext == NULL)
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return;
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VasEBoot_unregister_command (ext->cmd);
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VasEBoot_free (ext);
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}
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