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BSD 2.11 - man page for sigpause (bsd section 2)

SIGPAUSE(2)					 System Calls Manual					  SIGPAUSE(2)

NAME
sigpause - atomically release blocked signals and wait for interrupt
SYNOPSIS
sigpause(sigmask) long sigmask;
DESCRIPTION
Sigpause assigns sigmask to the set of masked signals and then waits for a signal to arrive; on return the set of masked signals is restored. Sigmask is usually 0L to indicate that no signals are now to be blocked. Sig- pause always terminates by being interrupted, returning -1 with errno set to EINTR. In normal usage, a signal is blocked using sigblock(2), to begin a critical section, variables modified on the occurrence of the signal are examined to determine that there is no work to be done, and the process pauses awaiting work by using sigpause with the mask returned by sigblock.
SEE ALSO
sigblock(2), sigvec(2) 4th Berkeley Distribution May 15, 1986 SIGPAUSE(2)


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