Fix bug: terminate program if file is not exists (#839)

Author: Nikolay Zakharov

src/utils/file.c

@@ -1159,24 +1159,35 @@ fio_stat(char const* path, struct stat* st, bool follow_symlink, fio_location lo
 bool
 fio_is_same_file(char const* filename1, char const* filename2, bool follow_symlink, fio_location location)
 {
+	char	*abs_name1 = make_absolute_path(filename1);
+	char	*abs_name2 = make_absolute_path(filename2);
+	bool	result = strcmp(abs_name1, abs_name2) == 0;
+
 #ifndef WIN32
-	struct stat	stat1, stat2;
+    if (!result)
+	{
+		struct stat	stat1, stat2;
 
-	if (fio_stat(filename1, &stat1, follow_symlink, location) < 0)
-		elog(ERROR, "Can't stat file \"%s\": %s", filename1, strerror(errno));
+		if (fio_stat(filename1, &stat1, follow_symlink, location) < 0)
+		{
+            if (errno == ENOENT)
+                return false;
+			elog(ERROR, "Can't stat file \"%s\": %s", filename1, strerror(errno));
+		}
 
-	if (fio_stat(filename2, &stat2, follow_symlink, location) < 0)
-		elog(ERROR, "Can't stat file \"%s\": %s", filename2, strerror(errno));
+		if (fio_stat(filename2, &stat2, follow_symlink, location) < 0)
+		{
+            if (errno == ENOENT)
+                return false;
+			elog(ERROR, "Can't stat file \"%s\": %s", filename2, strerror(errno));
+		}
 
-	return stat1.st_ino == stat2.st_ino && stat1.st_dev == stat2.st_dev;
-#else
-	char	*abs_name1 = make_absolute_path(filename1);
-	char	*abs_name2 = make_absolute_path(filename2);
-	bool	result = strcmp(abs_name1, abs_name2) == 0;
+		result = (stat1.st_ino == stat2.st_ino && stat1.st_dev == stat2.st_dev);
+	}
+#endif
 	free(abs_name2);
 	free(abs_name1);
 	return result;
-#endif
 }
 
 /*