[Bug 2048788] [NEW] sbuild autopkgtest just skips the unshare tests

[Dan Bungert]

Public bug reported:

sbuild autopkgtest test currenly looks like this:

2429s build-procenv        PASS
2429s unshare              SKIP exit status 77 and marked as skippable
2429s unshare-qemuwrapper  SKIP exit status 77 and marked as skippable

The unshare autopkg test is skipping because there is a check to see if unshare is working.
This fails like so:
unshare(CLONE_NEWNS|CLONE_NEWUSER)      = -1 EACCES (Permission denied)

With that failure, the unshare test realizes the problem and exits 77,
skipping the test.

In situations where this has regressed, that EACCES is due to LP:
#2035315.  Sbuild autopkgtest has an attempt at mitigating unshare
problems by running the test again - this is the unshare-qemuwrapper.
However this exits 77 for the same reason, which means that neither
version of the unshare test actually runs.

Sample log:
https://autopkgtest.ubuntu.com/results/autopkgtest-noble/noble/amd64/s/sbuild/20240108_203545_af566@/log.gz

** Affects: sbuild (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  sbuild autopkgtest test currenly looks like this:
  
  2429s build-procenv        PASS
  2429s unshare              SKIP exit status 77 and marked as skippable
  2429s unshare-qemuwrapper  SKIP exit status 77 and marked as skippable
  
  The unshare autopkg test is skipping because there is a check to see if unshare is working.
  This fails like so:
- unshare(CLONE_NEWNS|CLONE_NEWUSER)      = -1 EACCES (Permission denied) 
+ unshare(CLONE_NEWNS|CLONE_NEWUSER)      = -1 EACCES (Permission denied)
  
  With that failure, the unshare test realizes the problem and exits 77,
  skipping the test.
  
  In situations where this has regressed, that EACCES is due to LP:
  #2035315.  Sbuild autopkgtest has an attempt at mitigating unshare
  problems by running the test again - this is the unshare-qemuwrapper.
  However this exits 77 for the same reason, which means that neither
  version of the unshare test actually runs.
+ 
+ Sample log:
+ https://autopkgtest.ubuntu.com/results/autopkgtest-noble/noble/amd64/s/sbuild/20240108_203545_af566@/log.gz

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https://bugs.launchpad.net/bugs/2048788

Title:
  sbuild autopkgtest just skips the unshare tests

Status in sbuild package in Ubuntu:
  New

Bug description:
  sbuild autopkgtest test currenly looks like this:

  2429s build-procenv        PASS
  2429s unshare              SKIP exit status 77 and marked as skippable
  2429s unshare-qemuwrapper  SKIP exit status 77 and marked as skippable

  The unshare autopkg test is skipping because there is a check to see if unshare is working.
  This fails like so:
  unshare(CLONE_NEWNS|CLONE_NEWUSER)      = -1 EACCES (Permission denied)

  With that failure, the unshare test realizes the problem and exits 77,
  skipping the test.

  In situations where this has regressed, that EACCES is due to LP:
  #2035315.  Sbuild autopkgtest has an attempt at mitigating unshare
  problems by running the test again - this is the unshare-qemuwrapper.
  However this exits 77 for the same reason, which means that neither
  version of the unshare test actually runs.

  Sample log:
  https://autopkgtest.ubuntu.com/results/autopkgtest-noble/noble/amd64/s/sbuild/20240108_203545_af566@/log.gz

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