Re: [PATCH] selftests: arm64: Check fread return value in exec_target

On Thu, Aug 07, 2025 at 09:19:47PM +0530, Bala-Vignesh-Reddy wrote:

Fix -Wunused-result warning generated when compiled with gcc 13.3.0, by checking fread's return value and handling errors, preventing potential failures when reading from stdin.

Fixes compiler warning: warning: ignoring return value of 'fread' declared with attribute 'warn_unused_result' [-Wunused-result]

--- a/tools/testing/selftests/arm64/pauth/exec_target.c +++ b/tools/testing/selftests/arm64/pauth/exec_target.c @@ -13,7 +13,12 @@ int main(void)

• fread(&val, sizeof(size_t), 1, stdin);

• size_t size = fread(&val, sizeof(size_t), 1, stdin);
• if (size != 1) {

• fprintf(stderr, "Could not read input from stdin\n");
  

• return -1;
  

• }

It doesn't really matter but it'd be nicer to return a standard value from main(), EXIT_FAILURE is probably a good choice. Exit values are in the range 0..255.