[RFC PATCH v2 2/7] ndctl: nvdimmd: add nvdimmd necessary util functions

[QI Fuli <qi.fuli@jp.fujitsu.com>]

This patch is used to provide helper functions needed for nvdimm daemon.
These util functions can be used by other features as well in the future.

Signed-off-by: QI Fuli <qi.fuli@jp.fujitsu.com>
---
 nvdimmd/util.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 nvdimmd/util.h | 33 ++++++++++++++++++++++++
 2 files changed, 113 insertions(+)
 create mode 100644 nvdimmd/util.c
 create mode 100644 nvdimmd/util.h

diff --git a/nvdimmd/util.c b/nvdimmd/util.c
new file mode 100644
index 0000000..ef6819e
--- /dev/null
+++ b/nvdimmd/util.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2017, FUJITSU LIMITED. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ * more details.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "util.h"
+
+void logrotate(char *file)
+{
+	time_t c_time;
+	char buf[4096], tstamp[32];
+
+	c_time = time(NULL);
+	strftime(tstamp, sizeof(tstamp), ".%Y%m%d%H%M%S", localtime(&c_time));
+	strcpy(buf, file);
+	strcat(buf, tstamp);
+	rename(file, buf);
+}
+
+long get_size(char *file)
+{
+	struct stat buf;
+	if (stat(file, &buf) == 0)
+		return buf.st_size;
+	return -1L;
+}
+
+char *set_string(char **str, const char *value)
+{
+	*str = strdup(value);
+	return *str;
+}
+
+char *trim_string(char *str)
+{
+	char *start;
+	char *end;
+	int len = strlen(str);
+
+	if (len == 0)
+		return NULL;
+
+	if (str[len-1] == '\n') {
+		len--;
+		str[len] = 0;
+	}
+
+	start = str;
+	end = str + len - 1;
+	while(*start && isspace(*start))
+		start++;
+	while(*end && isspace(*end))
+		*end-- = 0;
+	strcpy(str, start);
+	return str;
+}
+
+int split_string(char *str, const char *deli, char *outlist[])
+{
+	int cnt = 0;
+	char *temp;
+
+	temp = strtok(str, deli);
+	while (temp != NULL && cnt < NUM_MAX_DIMM) {
+		outlist[cnt++] = temp;
+		temp = strtok(NULL, deli);
+	}
+	return cnt;
+}
diff --git a/nvdimmd/util.h b/nvdimmd/util.h
new file mode 100644
index 0000000..9648256
--- /dev/null
+++ b/nvdimmd/util.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2017, FUJITSU LIMITED. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ * more details.
+ */
+
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#define NUM_MAX_DIMM 1024
+
+void logrotate(char *file);
+
+long get_size(char *file);
+
+char *set_string(char **str, const char *value);
+
+char *trim_string(char *str);
+
+int split_string(char *str, const char *deli, char *outlist[]);
+
+#endif
-- 
2.9.5


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