[LTP] accept03/tst_fd: Harden parallel runs against shared path races

[linuxtestproject.agent@gmail.com]

Hi Stephen,

On Wed Nov 4 11:46:36 2026 -0500, Stephen Bertram <sbertram@redhat.com> wrote:
> accept03/tst_fd: Harden parallel runs against shared path races

> This covers accept03, epoll_pwait06, ioctl_pidfd01, and splice07,
> which call TST_FD_FOREACH without a private tmpdir.
>
> +static void fd_path(char *buf, size_t len, const char *prefix)
> +{
> +	snprintf(buf, len, "%s_%d", prefix, getpid());
> +}

Tests that create temporary files or directories must set .needs_tmpdir = 1
in struct tst_test rather than creating files in the current working
directory. Without .needs_tmpdir = 1, open_file(), open_path(), and
open_dir() fail with EROFS/EACCES when run from a read-only working
directory and leave leftover files behind if interrupted before
SAFE_UNLINK()/SAFE_RMDIR(). Set .needs_tmpdir = 1 in accept03,
epoll_pwait06, ioctl_pidfd01, and splice07 (as epoll_ctl06, readahead01,
ioctl_ficlone04, and file_attr04 already do) and guard file creation in
tst_fd.c with tst_tmpdir_created().

Verdict - Needs revision

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