-int write_string_to_file(FILE *f, const char *line);
-int write_string_file(const char *fn, const char *line);
-int write_string_file_atomic(const char *fn, const char *line);
+typedef enum {
+ WRITE_STRING_FILE_CREATE = 1,
+ WRITE_STRING_FILE_ATOMIC = 2,
+ WRITE_STRING_FILE_AVOID_NEWLINE = 4,
+} WriteStringFileFlags;
+
+int write_string_stream(FILE *f, const char *line, bool enforce_newline);
+int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags);