[LTP] fallocate01: Convert to new API

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Mon, 20 Jul 2026 13:48:26 +0200, Andrea Cervesato wrote:
> fallocate01: Convert to new API

--- [PATCH 1/2] ---

> +static void setup(void)
> +{
> +	char fname[NAME_MAX];
> +	struct stat file_stat;
> +
> +	snprintf(fname, sizeof(fname), "tfile_%d", getpid());

The filename buffer is one byte short. Per the LTP coding standard
(c-tests.md, "Path Buffers" section), a buffer holding only a filename
component must be NAME_MAX + 1 bytes to accommodate the null terminator
when the filename is exactly NAME_MAX characters long.

In this specific case the generated name is at most ~29 bytes and there
is no actual overflow, but the declaration should still read:

	char fname[NAME_MAX + 1];

Verdict - Needs revision

---
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