Bug#214141: Signal mask != Signal Handlers

[Daniel Burrows <dburrows@debian.org>]

  Hi,

  I've just gotten a bug on aptitude that may be related to this (#392870).
It looks to me like the bug log here (and ExecFork()'s code) gives the
answer: apt restores signal handlers after forking, but does NOT restore the
signal mask.  Something like, eg,

  sigset_t fullsigs;
  sigfillmask(&fullsigs);
  sigprocmask(SIG_UNBLOCK, &fullsigs, NULL);

  before the exec() would do the trick.  I'll implement a workaround in
aptitude for now, though.

  Daniel

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