all Python 3Linux · macOSsignalfunction

signal.pause()

timers

Puts the process to sleep until any handled signal arrives. Unix only (Linux, macOS); there is no such function on Windows.

Syntax

signal.pause()

There is no timeout: if no signal comes, the program sleeps forever. There is a race: a signal arriving between your condition check and the pause call has already been handled, and pause waits for the next one. The robust replacement is to block the signal with pthread_sigmask and wait with sigwait or sigtimedwait. For 'wait until Ctrl+C' in a server, pause is fine.

Examples

import signal
got = []
old = signal.signal(signal.SIGALRM, lambda s, f: got.append(s))
signal.setitimer(signal.ITIMER_REAL, 0.05)  # без таймера уснём навсегда
signal.pause()
signal.signal(signal.SIGALRM, old)
print(got == [signal.SIGALRM])  # → True

signal.pause()

Syntax

Examples

See also