tools: acrn-crashlog: get startup reason of system for acrnprobe

This file provides the functions to get system reboot reason from
kernel command line.

Signed-off-by: Liu Xinwu <xinwu.liu@intel.com>
Reviewed-by: Zhang Yanmin <yanmin.zhang@intel.com>
Reviewed-by: Liu Chuansheng <chuansheng.liu@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
Acked-by: Eddie Dong <Eddie.dong@intel.com>

tools/acrn-crashlog/acrnprobe/Makefile

@@ -25,7 +25,8 @@ $(BUILDDIR)/acrnprobe/bin/acrnprobe: $(BUILDDIR)/acrnprobe/obj/main.o \
 	$(BUILDDIR)/acrnprobe/obj/event_queue.o \
 	$(BUILDDIR)/acrnprobe/obj/event_handler.o \
 	$(BUILDDIR)/acrnprobe/obj/crash_reclassify.o \
-	$(BUILDDIR)/acrnprobe/obj/sender.o
+	$(BUILDDIR)/acrnprobe/obj/sender.o \
+	$(BUILDDIR)/acrnprobe/obj/startupreason.o
 	$(CC) -o $@ $^ $(LDFLAGS)
 
 clean:

tools/acrn-crashlog/acrnprobe/include/startupreason.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2018 Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * 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.
+ */
+
+extern void read_startupreason(char *startupreason);

tools/acrn-crashlog/acrnprobe/startupreason.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2018 Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * 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 <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <malloc.h>
+#include "fsutils.h"
+#include "startupreason.h"
+#include "log_sys.h"
+
+#define MAX_KERNEL_COMMAND_LINE_SIZE 4096
+#define CURRENT_KERNEL_CMDLINE "/proc/cmdline"
+
+static int get_cmdline_bootreason(char *bootreason)
+{
+	int res, len = MAX_KERNEL_COMMAND_LINE_SIZE;
+	char *p, *p1, *p2;
+	char *cmdline;
+	const char key[] = "bootreason=";
+
+	cmdline = malloc(len);
+	if (!cmdline) {
+		LOGE("failed to allocate memory to read %s\n",
+		     CURRENT_KERNEL_CMDLINE);
+		return -1;
+	}
+	res = file_read_string(CURRENT_KERNEL_CMDLINE, cmdline, len);
+	if (res <= 0) {
+		LOGE("failed to read file %s - %s\n",
+		     CURRENT_KERNEL_CMDLINE, strerror(errno));
+		free(cmdline);
+		return -1;
+	}
+
+	p = strstr(cmdline, key);
+	if (!p) {
+		free(cmdline);
+		return 0;
+	}
+	p += strlen(key);
+	p1 = strstr(p, " ");
+	p2 = strstr(p, "\n");
+	if (p2 && !p1)
+		*p2 = '\0';
+	else if (p2 && p2 < p1)
+		*p2 = '\0';
+	else if (p1)
+		*p1 = '\0';
+
+	strncpy(bootreason, p, strlen(p) + 1);
+	free(cmdline);
+	return strlen(bootreason);
+}
+
+static void get_default_bootreason(char *bootreason)
+{
+	int ret;
+	unsigned int i;
+	char bootreason_prop[MAX_KERNEL_COMMAND_LINE_SIZE];
+
+	ret = get_cmdline_bootreason(bootreason_prop);
+	if (ret <= 0)
+		return;
+
+	for (i = 0; i < strlen(bootreason_prop); i++)
+		bootreason[i] = toupper(bootreason_prop[i]);
+	bootreason[i] = '\0';
+
+}
+
+void read_startupreason(char *startupreason)
+{
+	strcpy(startupreason, "UNKNOWN");
+	get_default_bootreason(startupreason);
+}