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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/*
* Copyright (c) 2017 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <libconfig.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdbool.h>
#include <errno.h>
#include "config.h"
#include "log.h"
#include "system-recovery.h"
#include <asm-generic/setup.h> // for COMMAND_LINE_SIZE
#define KERNEL_CMDLINE_KEY "tizen.recovery"
static char *get_action_from_config(config_t *cfg)
{
config_setting_t *node;
const char *action;
node = config_lookup(cfg, "headless_action");
if (!node)
return NULL;
action = config_setting_get_string(node);
return strdup(action);
}
// looks for tizen.recovery= key in kernel command line
static char *get_action_from_cmdline(void)
{
FILE *fp;
char cmdline[COMMAND_LINE_SIZE];
int len;
fp = fopen("/proc/cmdline", "r");
if (!fp)
return NULL;
char *p = fgets(cmdline, sizeof cmdline, fp);
fclose(fp);
if (!p)
return NULL;
const char *prefix = KERNEL_CMDLINE_KEY "=";
p = strstr(cmdline, prefix);
if (!p)
return NULL;
p += strlen(prefix);
for (len = 0; *(p + len) != 0 && !isspace(*(p + len)); ++len)
; /* skip */
return strndup(p, len);
}
int recovery_headless(config_t *cfg)
{
config_setting_t *node;
node = config_lookup(cfg, "action_handlers");
if (!node)
return -ENOENT;
char *action = get_action_from_cmdline();
if (!action)
action = get_action_from_config(cfg);
if (!action)
return -ENOENT;
const char *handler;
int r = config_setting_lookup_string(node, action, &handler);
free(action);
if (r == CONFIG_FALSE)
return -ENOENT;
return system(handler);
}
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