Lines Matching refs:signal

46  * Retrofit new signal interface to old signal primitives.
59 #include <signal.h>
79  * The following helps us keep the extended signal semantics together.
80  * We remember for each signal the address of the function we're
104  * you are either ignoring or defaulting a signal in the child.
112 	signal(sig, func);
118  * Set the (permanent) disposition of a signal.
119  * If the signal is subsequently (or even now) held,
143 		 * If signal has been held, must retain
145 		 * of signal.
148 			signal(sig, SIG_DFL);
150 			signal(sig, _Sigtramp);
155 		 * Clear pending signal
157 		signal(sig, SIG_IGN);
161 	signal(sig, _Sigtramp);
166  * Hold a signal.
167  * This CAN be tricky if the signal's disposition is SIG_DFL.
168  * In that case, we still catch the signal so we can note it
184 	 * set up to catch the signal to note signal's occurrance.
188 		signal(sig, _Sigtramp);
195  * Release a signal
196  * If the signal occurred while we had it held, cause the signal.
218 		signal(sig, SIG_DFL);
223  * Ignore a signal.
233  * We assume LUSER called us with the signal held.
234  * When we got the signal, mark the signal as having
236  * the signal is released.
264 			signal(i, SIG_IGN);
269  * Return the current disposition of a signal
270  * If we have not set this signal before, we have to
283 	 * If we have no knowledge of this signal,
287 		old = signal(sig, SIG_IGN);
290 		signal(sig, old);
294 	 * If we have set this signal before, then sigset()
302  * The following routine gets called for any signal
316 	old = signal(sig, SIG_IGN);
318 	 * If signal being paused on, wakeup sigpause()
323 	 * If signal is being held, mark its table entry
324 	 * so we can trigger it when signal is released.
329 		signal(sig, _Sigtramp);
333 	 * If the signal is being ignored, just return.
335 	 * any system with SIGCONT also has the new signal pkg, so...
340 	 * If the signal is SIG_DFL, then we probably got here
341 	 * by holding the signal, having it happen, then releasing
342 	 * the signal. 
345 		signal(sig, SIG_DFL);
351 	 * Looks like we should just cause the signal...
352 	 * We hold the signal for the duration of the user's
353 	 * code with the signal re-enabled.  If the signal
357 	 * from there, we can cause the signal again.
361 	signal(sig, _Sigtramp);
364 	 * If the signal re-occurred while in the user's routine,