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28 .\" $FreeBSD: src/lib/libc_r/man/sigwait.3,v 1.2.2.6 2001/12/17 10:08:26 ru Exp $
34 .Nd select a set of signals
40 .Fn sigwait "const sigset_t * __restrict set" "int * __restrict sig"
44 function selects a set of signals, specified by
46 If none of the selected signals are pending,
48 waits until one or more of the selected signals has been generated.
51 atomically clears one of the selected signals from the set of pending signals
52 (for the process or for the current thread) and sets the location pointed to by
54 to the signal number that was cleared.
56 The signals specified by
58 should be blocked at the time of the call to
63 returns 0 and sets the location pointed to by
65 to the cleared signal number.
66 Otherwise, an error number is returned.
70 function will fail if:
75 argument specifies one or more invalid signal numbers.