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34 .Nm sigtimedwait , sigwaitinfo
35 .Nd "wait for queued signals (REALTIME)"
42 .Fa "const sigset_t *restrict set" "siginfo_t *restrict info"
43 .Fa "const struct timespec *restrict timeout"
46 .Fn sigwaitinfo "const sigset_t * restrict set" "siginfo_t * restrict info"
50 system call is equivalent to
52 except that if none of the signals specified by
56 waits for the time interval specified in the
58 structure referenced by
62 structure pointed to by
64 is zero-valued and if none of the signals specified by
68 returns immediately with an error.
73 pointer, the behavior is unspecified.
75 clock is used to measure the time interval specified by the
81 system call selects the pending signal from the set specified by
83 Should any of multiple pending signals in the range
87 be selected, it shall be the lowest numbered one.
89 selection order between realtime and non-realtime signals, or
90 between multiple pending non-realtime signals, is unspecified.
93 is pending at the time of the call, the calling thread
94 is suspended until one or more signals in
96 become pending or until it is interrupted by an unblocked, caught signal.
100 system call is equivalent to the
112 function is equivalent to
114 except that the selected signal number shall be stored in the
116 member, and the cause of the signal shall be stored in the
119 If any value is queued to the selected signal, the first such queued
120 value is dequeued and, if the info argument is
122 the value is stored in the
126 The system resource used to queue the signal
127 is released and returned to the system for other use.
128 If no value is queued,
131 member is zero-valued.
132 If no further signals are
133 queued for the selected signal, the pending indication for that signal
136 Upon successful completion (that is, one of the signals specified by
138 is pending or is generated)
142 return the selected signal number.
143 Otherwise, the functions return a value of \-1
144 and set the global variable
146 to indicate the error.
154 No signal specified by set was generated within the specified timeout period.
161 system calls fail if:
164 The wait was interrupted by an unblocked, caught signal.
166 Any arguments point outside the allocated address space or there is a
167 memory protection fault.
172 system call may also fail if:
179 value less than zero or greater than or equal
181 Kernel only checks for this error if no signal is pending in set and it
182 is necessary to wait.
191 .Xr pthread_sigmask 3 ,
198 system calls conform to