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enter_quiet_zone(3)


NAME

  enter_quiet_zone, exit_quiet_zone - Prevent keyboard interruption of
  program actions (Enhanced Security)


SYNOPSIS

  #include <prot.h>

  void enter_quiet_zone( );

  #include <prot.h>

  void exit_quiet_zone( );


LIBRARY

  Security Library - libsecurity.so


DESCRIPTION

  The enter_quiet_zone() function sets the appropriate signals to a state
  that prevents keyboard interruption of program actions.  If this function
  is called multiple times without an intervening exit_quiet_zone() call,
  nothing is done.  If an alarm has been set, the time left to go is saved.

  The exit_quiet_zone() function restores the signals to their previous
  state.  Do not call this function from reentrant code because it uses a
  static area. A pending alarm clock is restored.

  The signals that are affected are SIGHUP, SIGINT, SIGQUIT, SIGSYS, SIGALRM.


SEE ALSO

  Security

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