bsd/kern/kern_sig.c

285  * Can process p, with ucred uc, send the signal signum to process q?
565  *		process/thread pair.
629 	 * as we have to restart the process.
649  * Initialize signal state for process 0;
663  * Reset signals for an exec of the specified process.
675 	 * transfer saved signal states from the process
678 	 * NOTE: We do this without the process locked,
681 	 * only accessed by threads inside the process.
712 	/* process */
782  * Suspend process until signal, providing mask to be set
1396 		/* kill single process */
1407 		AUDIT_ARG(process, p);
1420 	case 0:			/* signal own process group */
1422 	default:		/* negative explicit process group */
1496  * Common code for kill process group/broadcast kill.
1497  * cp is calling process.
1528 			 * zero pgid means send to my process group.
1558  * Send a signal to a process group.
1572  * Send a signal to a process group.  If checkctty is 1,
1652 	/* mark on process as well */
1697  * Send the signal to the process.  If the signal has an action, the action
1698  * is usually performed by the target process rather than the caller; we add
1699  * the signal to the set of pending signals for the process.
1702  *   o When a stop signal is sent to a sleeping process that takes the
1703  *     default action, the process is stopped without awakening it.
1737 	 *	check for a zombie process.  Also don't send signals
1758 	 * do not send signals to the process that has the thread
1761 	 * also no need to send a signal to a process that is in the middle
1854 		 * process group, discard the signal here if the action
1855 		 * is default; don't stop the process below if sleeping,
1932 		/* if it is SIGCONT resume whole process */
1963 		 * signalled process/thread sigaction handler, when it
1966 		 * number itself, instead of the child process exit status.
1990 			 * stop a process.
2064 			 * Kill signal always sets process running and
2086 			 * Let the process run.  If it's sleeping on an
2119 			 * the process, and for which there is no handler,
2130 			 * All other signals wake up the process, but don't
2196  * If the current process has received a signal (should be caught or cause
2416 			 * If there is a pending stop signal to process
2419 			 * if process is member of an orphaned
2420 			 * process group, ignore tty stop signals.
2483 			 * than SIGCONT, unless process is traced.
2493 			 * postsig() process it.
2578 			 * If there is a pending stop signal to process
2581 			 * if process is member of an orphaned
2582 			 * process group, ignore tty stop signals.
2613 			 * than SIGCONT, unless process is traced.
2623 			 * postsig() process it.
2632  * Put the argument process into the stopped state and notify the parent
2633  * via wakeup.  Signals are handled elsewhere.  The process must not be
2688 		 * the process.  (Other cases were ignored above.)
2779  * Attach a signal knote to the list of knotes for this process.
2804  * remove the knote from the process list, if it hasn't already
2821  * as process knotes, we have to filter out and handle only signal events.
2823  * We assume that we process fdfree() before we post the NOTE_EXIT for
2824  * a process during exit.  Therefore, since signal filters can only be
2825  * set up "in-process", we should have already torn down the kqueue
3027 	/* If the process is in proc exit return no signal info */