+int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) {
+ _cleanup_fclose_ FILE *f = NULL;
+
+ assert(fn);
+ assert(line);
+
+ if (flags & WRITE_STRING_FILE_ATOMIC) {
+ assert(flags & WRITE_STRING_FILE_CREATE);
+
+ return write_string_file_atomic(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE));
+ }
+
+ if (flags & WRITE_STRING_FILE_CREATE) {
+ f = fopen(fn, "we");
+ if (!f)
+ return -errno;
+ } else {
+ int fd;
+
+ /* We manually build our own version of fopen(..., "we") that
+ * works without O_CREAT */
+ fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0)
+ return -errno;
+
+ f = fdopen(fd, "we");
+ if (!f) {
+ safe_close(fd);
+ return -errno;
+ }
+ }
+
+ return write_string_stream(f, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE));
+}
+