[LTP] lib: add safe macros for stream testing suite

[linuxtestproject.agent@gmail.com]

Hi Andrea,

--- [PATCH 3/7] ---

On Thu, 16 Apr 2026 16:33:37 +0200, Andrea Cervesato wrote:
> lib: add TST_EXP_PASS_PTR_NULL() macro

This lib commit is sandwiched between stream01 and stream02 test commits.
All library helper additions should come before the test rewrites that
depend on them.

--- [PATCH 5/7] ---

On Thu, 16 Apr 2026 16:33:39 +0200, Andrea Cervesato wrote:
> fs: rewrite stream03 test using new API

> +	rewind(stream);
> +	TST_EXP_EQ_LI(SAFE_FTELL(stream), SEEK_SET);

SEEK_SET is a whence-direction constant (== 0), not a byte offset.
Use 0 here instead.

---
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