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Paul Eggert authored
* atimer.c (sigmask_atimers): Remove. Remaining use rewritten to use body of this function. * atimer.c (block_atimers, unblock_atimers): * callproc.c (block_child_signal, unblock_child_signal): * sysdep.c (block_tty_out_signal, unblock_tty_out_signal): New arg OLDSET. All callers changed. * atimer.c (block_atimers, unblock_atimers): * callproc.c (block_child_signal, unblock_child_signal): * keyboard.c (handle_interrupt): * sound.c (vox_configure, vox_close): Restore the old signal mask rather than unilaterally clearing bits from the mask, in case a handler is running within another handler. All callers changed. * lisp.h, process.c, process.h, term.c: Adjust decls and callers to match new API. * sysdep.c (emacs_sigaction_init): Don't worry about masking SIGFPE; signal handlers aren't supposed to use floating point anyway. (handle_arith_signal): Unblock just SIGFPE rather than clearing mask. Fixes: debbugs:15561
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