}

static void Append(const TF_WritableFile* file, const char* buffer, size_t n,
                   TF_Status* status) {
  auto posix_file = static_cast<PosixFile*>(file->plugin_file);

  size_t r = fwrite(buffer, 1, n, posix_file->handle);
  if (r != n)
    TF_SetStatusFromIOError(status, errno, posix_file->filename);
  else
    TF_SetStatus(status, TF_OK, "");
}

index a5202a1..772d081 100644
--- a/timezone/zic.c
+++ b/timezone/zic.c
@@ -1609,7 +1609,7 @@ writezone(const char *const name, const char *const string)
 		}
 #define DO(field)	((void) fwrite(tzh.field, sizeof tzh.field, 1, fp))
 		tzh = tzh0;
-		(void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
+		memcpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
 		tzh.tzh_version[0] = ZIC_VERSION;

*   Fixes an integer overflow in TFLite
    ([CVE-2022-23559](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23559))
*   Fixes a dangerous OOB write in TFLite
    ([CVE-2022-23561](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23561))
*   Fixes a vulnerability leading to read and write outside of bounds in TFLite
    ([CVE-2022-23560](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23560))