shared_func.[hc]: add functions getFileSize

HISTORY

@@ -1,5 +1,5 @@
 
-Version 1.44  2020-02-27
+Version 1.44  2020-03-03
   * add test file src/tests/test_pthread_lock.c
   * add uniq_skiplist.[hc]
   * add function split_string_ex
@@ -13,6 +13,7 @@ Version 1.44  2020-02-27
   * shared_func.[hc]: add functions fc_floor_prime and fc_ceil_prime
   * fast_mpool.[hc]: change function fast_mpool_strdup
   * fast_allocator.[hc]: add function fast_allocator_strdup
+  * shared_func.[hc]: add functions getFileSize
 
 Version 1.43  2019-12-25
   * replace function call system to getExecResult,

src/shared_func.c

@@ -323,7 +323,7 @@ int getUserProcIds(const char *progName, const bool bAllOwners, \
 		
 		sprintf(fullpath, "%s/%s", path, dirp->d_name);
 		memset(&statbuf, 0, sizeof(statbuf));
-		if (lstat(fullpath, &statbuf)<0)
+		if (lstat(fullpath, &statbuf) < 0)
 		{
 			continue;
 		}
@@ -1240,6 +1240,22 @@ int getFileContentEx(const char *filename, char *buff, \
 	return 0;
 }
 
+int getFileSize(const char *filename, int64_t *file_size)
+{
+	struct stat buf;
+	if (stat(filename, &buf) != 0)
+	{
+		logError("file: "__FILE__", line: %d, "
+			"stat file %s fail, "
+			"errno: %d, error info: %s", __LINE__,
+			filename, errno, STRERROR(errno));
+		return errno != 0 ? errno : EIO;
+	}
+
+    *file_size = buf.st_size;
+    return 0;
+}
+
 int writeToFile(const char *filename, const char *buff, const int file_size)
 {
 	int fd;

src/shared_func.h

@@ -546,6 +546,14 @@ int getFileContent(const char *filename, char **buff, int64_t *file_size);
 int getFileContentEx(const char *filename, char *buff, \
 		int64_t offset, int64_t *size);
 
+/** get file size
+ *  parameters:
+ *  	filename: the filename
+ *  	file_size: store the file size
+ *  return: error no , 0 success, != 0 fail
+*/
+int getFileSize(const char *filename, int64_t *file_size);
+
 /** write to file
  *  parameters:
  *  	filename: the filename to write