96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*
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* Copyright (C) 2018 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <ctype.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <malloc.h>
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#include "fsutils.h"
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#include "startupreason.h"
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#include "log_sys.h"
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#define MAX_KERNEL_COMMAND_LINE_SIZE 4096
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#define CURRENT_KERNEL_CMDLINE "/proc/cmdline"
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static int get_cmdline_bootreason(char *bootreason)
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{
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int res, len = MAX_KERNEL_COMMAND_LINE_SIZE;
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char *p, *p1, *p2;
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char *cmdline;
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const char key[] = "bootreason=";
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cmdline = malloc(len);
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if (!cmdline) {
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LOGE("failed to allocate memory to read %s\n",
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CURRENT_KERNEL_CMDLINE);
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return -1;
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}
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res = file_read_string(CURRENT_KERNEL_CMDLINE, cmdline, len);
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if (res <= 0) {
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LOGE("failed to read file %s - %s\n",
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CURRENT_KERNEL_CMDLINE, strerror(errno));
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free(cmdline);
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return -1;
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}
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p = strstr(cmdline, key);
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if (!p) {
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free(cmdline);
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return 0;
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}
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p += strlen(key);
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p1 = strstr(p, " ");
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p2 = strstr(p, "\n");
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if (p2 && !p1)
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*p2 = '\0';
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else if (p2 && p2 < p1)
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*p2 = '\0';
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else if (p1)
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*p1 = '\0';
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strncpy(bootreason, p, strlen(p) + 1);
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free(cmdline);
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return strlen(bootreason);
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}
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static void get_default_bootreason(char *bootreason)
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{
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int ret;
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unsigned int i;
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char bootreason_prop[MAX_KERNEL_COMMAND_LINE_SIZE];
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ret = get_cmdline_bootreason(bootreason_prop);
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if (ret <= 0)
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return;
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for (i = 0; i < strlen(bootreason_prop); i++)
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bootreason[i] = toupper(bootreason_prop[i]);
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bootreason[i] = '\0';
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}
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void read_startupreason(char *startupreason)
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{
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strcpy(startupreason, "UNKNOWN");
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get_default_bootreason(startupreason);
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}
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