I wonder how to fix it. Merely documenting the restriction isn't really anoption, as no widespread system has it. Saving the signal handler,
disabling it then restoring would work but introduces a slight race
condition (a child process can exit while we're in grantpt()).

In fact, it is documented:

http://pubs.opengroup.org/onlinepubs/9699919799/functions/grantpt.html

  The behavior of the grantpt() function is unspecified if the application
  has installed a signal handler to catch SIGCHLD signals.

What is the real package, which hits this problem ?

Petr


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