Lines Matching full:signal

33 .Nd software signal facilities
54 Signal delivery resembles the occurrence of a hardware interrupt:
55 the signal is blocked from further occurrence, the current process
59 to which a signal is delivered, or specify that a signal is to be
64 by the system when a signal occurs.
65 Normally, signal handlers execute on the current stack
69 .Em "signal stack" .
73 Signal routines execute with the signal that caused their
78 .Em "signal mask"
81 The signal mask for a process is initialized
88 call, or when a signal is delivered to the process.
90 When a signal
91 condition arises for a process, the signal is added to a set of
93 If the signal is not currently
96 When a signal
98 a new signal mask is calculated (as described below),
99 and the signal handler is invoked.
101 is arranged so that if the signal handling routine returns
103 from before the signal's delivery.
107 When a signal is delivered to a process a new signal mask is
108 installed for the duration of the process' signal handler
114 This mask is formed by taking the current signal mask,
115 adding the signal to be delivered, and
117 in the signal mask associated with the handler to be invoked.
122 assigns a handler for a specific signal.
127 to be used when delivering the specified signal.
132 the system will deliver the signal to the process on a
133 .Em "signal stack" ,
138 is non-zero, the previous handling information for the signal
162 .It Dv SIGTERM No "	terminate process" "	software termination signal"
163 .It Dv SIGURG No "	discard signal" "	urgent condition present on socket"
165 .It Dv SIGTSTP No "	stop process" "	stop signal generated from keyboard"
166 .It Dv SIGCONT No "	discard signal" "	continue after stop"
167 .It Dv SIGCHLD No "	discard signal" "	child status has changed"
170 .It Dv SIGIO No "	discard signal" Tn "	I/O"
181 .It Dv SIGWINCH No "	discard signal" "	Window size change"
182 .It Dv SIGINFO No "	discard signal" "	status request from keyboard"
183 .It Dv SIGUSR1 No "	terminate process" "	User defined signal 1"
184 .It Dv SIGUSR2 No "	terminate process" "	User defined signal 2"
187 Once a signal handler is installed, it remains installed
193 A signal-specific default action may be reset by
200 See the above signal list for each signal's default action.
206 of the signal are ignored and discarded.
208 If a signal is caught during the system calls listed below,
237 all signals, the signal mask, the signal stack,
246 the signal mask remains the same;
276 is the signal number, into which the hardware faults and traps are
296 used to restore the context from before the signal.
301 will fail and no new signal handler will be installed if one
315 is not a valid signal number.
335 .Xr signal 3 ,