1SIGACTION(2)                  System Calls Manual                 SIGACTION(2)
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NAME

6       sigwait - wait for a signal
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SYNOPSIS

9       #include <signal.h>
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11       int sigwait(set, sig)
12       sigset_t *set;
13       int *sig;
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DESCRIPTION

16       Sigwait  checks  for a pending signal in set, clears it from the set of
17       pending signals and returns the signal number in  the  location  refer‐
18       enced  by  sig.   If  more  than one of the signals contained in set is
19       pending then sigwait selects only one and acts upon it.  If  no  signal
20       contained in set is pending, then sigwait waits for a signal to arrive.
21       All of the signals contained in set should be blocked or  unpredictable
22       results may occur.
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RETURN VALUES

25       The  sigwait  function returns 0 if successful and the signal number is
26       stored in the location referenced by sig.
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ERRORS

29       The sigwait function may return one of the following errors:
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31       EINVAL              The set argument contains an invalid or unsupported
32                           signal number.
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34       EFAULT              Sig  points  to  memory that is not a valid part of
35                           the process address space.
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SEE ALSO

38       sigprocmask(2)
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STANDARDS

41       The sigwait function call conforms to IEEE Std1003.1-1998 (``POSIX'').
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454.4 Berkeley Distribution     September 10, 1999                  SIGACTION(2)