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Dan Nicolaescu authored
* atimer.c (set_alarm): Remove dead code, all USG systems define POSIX_SIGNALS. * data.c (arith_error): Likewise. * keyboard.c (input_available_signal, handle_user_signal) (interrupt_signal): Likewise. * process.c (sigchld_handler): Likewise. (create_process): Remove if 0 code. Remove HPUX conditional when !defined (POSIX_SIGNALS), it cannot be true. * syssignal.h: Remove USG5_4 and USG conditionals when !POSIX_SIGNALS, they cannot be true.
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