lib/utmp.c: Use the appropriate autotools macros for struct utmpx

[alejandro-colomar]

Oops. I forgot to do a change.

Recently, we started using utmpx instead of utmp, and we updated
<./configure.ac> to do the checks for 'struct utmpx' instead of
'struct utmp'.  However, I forgot to update the preprocessor
conditionals accordingly.

Fixes: 64bcb54 ("lib/, src/, configure.ac: Use utmpx instead of utmp")
Link: #954
Cc: @firasuke
Cc: @awilfox
Cc: @ikerexxe

[alejandro-colomar]

v2 changes:

• Remove #endif comments in a separate commit.

$ git range-diff shadow/master gh/utmpx utmpx 
1:  8ca977f9 = 1:  8ca977f9 lib/utmp.c: Indent nested preprocessor conditionals
2:  ee54d49b = 2:  ee54d49b lib/utmp.c: Merge preprocessor conditionals
3:  e4b4664c ! 3:  1bc3b340 lib/utmp.c: Use defined() instead of #if[n]def
...
-:  -------- > 4:  7c7223df lib/utmp.c: Use defined() instead of #if[n]def
4:  5d9b0245 = 5:  fe88a9a0 lib/utmp.c: Use the appropriate autotools macro for struct utmpx

$ git diff 5d9b0245..fe88a9a0
$ 

[alejandro-colomar]

v2b changes:

• Use plural in commit subject line

$ git range-diff shadow/master gh/utmpx utmpx 
1:  8ca977f9 = 1:  8ca977f9 lib/utmp.c: Indent nested preprocessor conditionals
2:  ee54d49b = 2:  ee54d49b lib/utmp.c: Merge preprocessor conditionals
3:  1bc3b340 = 3:  1bc3b340 lib/utmp.c: Remove #endif comments
4:  7c7223df = 4:  7c7223df lib/utmp.c: Use defined() instead of #if[n]def
5:  fe88a9a0 ! 5:  52b4deef lib/utmp.c: Use the appropriate autotools macro for struct utmpx
    @@ Metadata
     Author: Alejandro Colomar <alx@kernel.org>
     
      ## Commit message ##
    -    lib/utmp.c: Use the appropriate autotools macro for struct utmpx
    +    lib/utmp.c: Use the appropriate autotools macros for struct utmpx
     
         Recently, we started using utmpx instead of utmp, and we updated
         <./configure.ac> to do the checks for 'struct utmpx' instead of

[ikerexxe]

LGTM!

[alejandro-colomar]

On Tue, Feb 20, 2024 at 11:41:19PM -0800, Iker Pedrosa wrote: @ikerexxe approved this pull request. LGTM!

v2c changes: - Reviewed $ git range-diff shadow/master 52b4dee utmpx 1: 8ca977f ! 1: bceeefe lib/utmp.c: Indent nested preprocessor conditionals @@ Metadata ## Commit message ## lib/utmp.c: Indent nested preprocessor conditionals + Reviewed-by: Iker Pedrosa ***@***.***> Signed-off-by: Alejandro Colomar ***@***.***> ## lib/utmp.c ## 2: ee54d49 ! 2: 91e43fe lib/utmp.c: Merge preprocessor conditionals @@ Metadata ## Commit message ## lib/utmp.c: Merge preprocessor conditionals + Reviewed-by: Iker Pedrosa ***@***.***> Signed-off-by: Alejandro Colomar ***@***.***> ## lib/utmp.c ## 3: 1bc3b34 ! 3: 3947d9c lib/utmp.c: Remove #endif comments @@ Commit message Indentation makes it clear which is which. + Reviewed-by: Iker Pedrosa ***@***.***> Signed-off-by: Alejandro Colomar ***@***.***> ## lib/utmp.c ## 4: 7c7223d ! 4: 08dff70 lib/utmp.c: Use defined() instead of #if[n]def @@ Metadata ## Commit message ## lib/utmp.c: Use defined() instead of #if[n]def + Reviewed-by: Iker Pedrosa ***@***.***> Signed-off-by: Alejandro Colomar ***@***.***> ## lib/utmp.c ## 5: 52b4dee ! 5: 5a936ad lib/utmp.c: Use the appropriate autotools macros for struct utmpx @@ Commit message Link: <#954> Cc: Firas Khalil Khana ***@***.***> Cc: "A. Wilfox" <https://github.com/awilfox> - Cc: Iker Pedrosa ***@***.***> + Reviewed-by: Iker Pedrosa ***@***.***> Signed-off-by: Alejandro Colomar ***@***.***> ## lib/utmp.c ##

…

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[alejandro-colomar]

I'm not able to reproduce the problem from the CI, so I'll open a PR to be able to see those errors in the CI.

[alejandro-colomar]

I've put the commit in this PR, so that we can test it with this failure.

v3 changes:

• Use trap(1) in CI to show the testsuite.log

(I'll probably want to do something similar with the cmocka logs.)

$ git range-diff shadow/master gh/utmpx utmpx 
1:  bceeefe2 = 1:  bceeefe2 lib/utmp.c: Indent nested preprocessor conditionals
2:  91e43fee = 2:  91e43fee lib/utmp.c: Merge preprocessor conditionals
3:  3947d9c6 = 3:  3947d9c6 lib/utmp.c: Remove #endif comments
4:  08dff703 = 4:  08dff703 lib/utmp.c: Use defined() instead of #if[n]def
5:  5a936adc = 5:  5a936adc lib/utmp.c: Use the appropriate autotools macros for struct utmpx
-:  -------- > 6:  f232202e .github/workflows/runner.yml: Use trap(1) to show the testsuite log

[alejandro-colomar]

Huh, a Heisenbug. When we try to measure it, it disappears. :|

I'll drop the last patch, and trigger a new run of CI, and see it it reproduces again.

[alejandro-colomar]

v3.1:

• Drop the last patch, to see if it brings back the Heisenbug.

$ git range-diff shadow/master gh/utmpx utmpx 
1:  bceeefe2 = 1:  bceeefe2 lib/utmp.c: Indent nested preprocessor conditionals
2:  91e43fee = 2:  91e43fee lib/utmp.c: Merge preprocessor conditionals
3:  3947d9c6 = 3:  3947d9c6 lib/utmp.c: Remove #endif comments
4:  08dff703 = 4:  08dff703 lib/utmp.c: Use defined() instead of #if[n]def
5:  5a936adc = 5:  f29895f0 lib/utmp.c: Use the appropriate autotools macros for struct utmpx
6:  f232202e < -:  -------- .github/workflows/runner.yml: Use trap(1) to show the testsuite log

[alejandro-colomar]

v3.3:

• Roll back to v2c (another attempt to trigger the heisenbug).

[alejandro-colomar]

Since tests pass now, and we're again in v2c, as reviewed by Iker, I'll merge.