exit_quiet_zone(3) [osf1 man page]

enter_quiet_zone(3)					     Library Functions Manual					       enter_quiet_zone(3)

NAME

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

LIBRARY

       Security Library - libsecurity.so

SYNOPSIS

       #include <prot.h>
       void enter_quiet_zone();

       #include <prot.h>
       void exit_quiet_zone();

DESCRIPTION

       The  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 call, nothing is done.  If an alarm has been set, the time left to go is saved.

       The 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.

RELATED INFORMATION

       Security

       delim off

															       enter_quiet_zone(3)

ALARM(3)						   BSD Library Functions Manual 						  ALARM(3)

NAME

     alarm -- set signal timer alarm

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     unsigned
     alarm(unsigned seconds);

DESCRIPTION

     This interface is made obsolete by setitimer(2).

     The alarm() function sets a timer to deliver the signal SIGALRM to the calling process after the specified number of seconds.  If an alarm
     has already been set with alarm() but has not been delivered, another call to alarm() will supersede the prior call.  The request alarm(0)
     voids the current alarm and the signal SIGALRM will not be delivered.

     Due to setitimer(2) restriction the maximum number of seconds allowed is 100000000.

RETURN VALUES

     The return value of alarm() is the amount of time left on the timer from a previous call to alarm().  If no alarm is currently set, the
     return value is 0.

SEE ALSO

     setitimer(2), sigaction(2), sigpause(2), sigvec(2), signal(3), sleep(3), ualarm(3), usleep(3)

HISTORY

     An alarm() function appeared in Version 7 AT&T UNIX.

BSD
								  April 19, 1994							       BSD