[PATCH v3 00/14] selftests/nolibc: allow run with minimal kernel config

[Zhangjin Wu <falcon@tinylab.org>]

Willy, Thomas

This is v3 to allow run with minimal kernel config, see v2 [1].

Applied further suggestions from Thomas, It is based on our previous v5
sysret helper series [2] and Thomas' chmod_net removal patchset [3].

Now, a test report on arm/vexpress-a9 without procfs, shmem, tmpfs, net
and memfd_create looks like:

    LOG: testing report for arm/vexpress-a9:

    14 chmod_self                                                   [SKIPPED]
    16 chown_self                                                   [SKIPPED]
    40 link_cross                                                   [SKIPPED]
    0 -fstackprotector not supported                                [SKIPPED]

    139 test(s) passed, 4 skipped, 0 failed.
    See all results in /labs/linux-lab/logging/nolibc/arm-vexpress-a9-nolibc-test.log

    LOG: testing summary:

         arch/board | result
        ------------|------------
    arm/vexpress-a9 | 139 test(s) passed, 4 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/arm-vexpress-a9-nolibc-test.log

Changes from v2 --> v3:

* Added Reviewed-by from Thomas for the whole series, Many Thanks

* selftests/nolibc: stat_fault: silence NULL argument warning with glibc
  selftests/nolibc: gettid: restore for glibc and musl
  selftests/nolibc: add _LARGEFILE64_SOURCE for musl
  selftests/nolibc: fix up int_fast16/32_t test cases for musl
  selftests/nolibc: fix up kernel parameters support
  selftests/nolibc: stat_timestamps: remove procfs dependency
  selftests/nolibc: link_cross: use /proc/self/cmdline
  tools/nolibc: add rmdir() support
  selftests/nolibc: add a new rmdir() test case
  selftests/nolibc: fix up failures when CONFIG_PROC_FS=n
  selftests/nolibc: vfprintf: remove MEMFD_CREATE dependency

    No code changes except some commit message cleanups.

* selftests/nolibc: prepare /tmp for tmpfs or ramfs

    As suggested by Thomas, simply calling mkdir() and mount() to
    prepare /tmp can save a stat() call.

* selftests/nolibc: chroot_exe: remove procfs dependency

    As suggested by Thomas, remove the 'weird' get_tmpfile() and use
    the '/init' for !procfs as we did for stat_timestamps.

    For the worst-case scene, when '/init' is not there, add ENOENT to
    the error check list.

    Now, it is a oneline code change.

* selftests/nolibc: add chmod_tmpdir test

    Without get_tmpfile(), let's direct mkdir() a temp directory for
    chmod_tmpdir test, it function as a substitute for the removed
    chmod_net.

    Now, it is a oneline code change.

Best regards,
Zhangjin
---
[1]: https://lore.kernel.org/lkml/cover.1688078604.git.falcon@tinylab.org/

Zhangjin Wu (14):
  selftests/nolibc: stat_fault: silence NULL argument warning with glibc
  selftests/nolibc: gettid: restore for glibc and musl
  selftests/nolibc: add _LARGEFILE64_SOURCE for musl
  selftests/nolibc: fix up int_fast16/32_t test cases for musl
  selftests/nolibc: fix up kernel parameters support
  selftests/nolibc: stat_timestamps: remove procfs dependency
  selftests/nolibc: chroot_exe: remove procfs dependency
  selftests/nolibc: link_cross: use /proc/self/cmdline
  tools/nolibc: add rmdir() support
  selftests/nolibc: add a new rmdir() test case
  selftests/nolibc: fix up failures when CONFIG_PROC_FS=n
  selftests/nolibc: prepare /tmp for tmpfs or ramfs
  selftests/nolibc: add chmod_tmpdir test
  selftests/nolibc: vfprintf: remove MEMFD_CREATE dependency

 tools/include/nolibc/sys.h                   | 22 ++++++
 tools/testing/selftests/nolibc/nolibc-test.c | 83 +++++++++++++++-----
 2 files changed, 87 insertions(+), 18 deletions(-)

-- 
2.25.1