sigwait.2 (2010 09)

sigwait(2) sigwait(2)

errno variable is NOT set if an error occurs.

Upon successful completion,

sigwaitinfo()

and sigtimedwait()

will return the selected signal

number. Otherwise a value of -1 is returned and

errno is set to indicate the error.

ERRORS

If any of the following conditions occur, the sigwait family of routines will return the following error

number:

[EAGAIN]

sigtimedwait()

was called and no signal in the set parameter was delivered

within the time interval speciﬁed by the timeout parameter.

If any of the following conditions occur and the condition is detected, the sigwait family of routines will

fail and return the following error number:

[EINVAL] set contains an invalid or unsupported signal number.

[EINVAL]

sigtimedwait() was called and the timeout parameter speciﬁed a tv_nsec value

less than zero or greater than or equal to 1000 million, or a tv_sec value less than

zero or greater than or equal to 2147483648 (that is, a value too large to be

represented as a signed 32-bit integer).

[EINTR] The wait was interrupted by an unblocked, caught signal.

[EFAULT] At least one of the set, sig, info, or timeout parameters references an illegal address.

AUTHOR

sigwaitinfo() and sigtimedwait() were derived from the IEEE POSIX P1003.1b standard.

sigwait() was derived from the IEEE POSIX P1003.1c standard.