11622 clean up rarer mandoc lint warnings

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  48 .TH NANOSLEEP 3C "Mar 27, 2016"
  49 .SH NAME
  50 nanosleep, thrd_sleep \- high resolution sleep
  51 .SH SYNOPSIS
  52 .LP
  53 .nf
  54 #include <time.h>
  55 
  56 \fBint\fR \fBnanosleep\fR(\fBconst struct timespec *\fR\fIrqtp\fR,
  57      \fBstruct timespec *\fR\fIrmtp\fR);
  58 .fi
  59 
  60 .nf
  61 #include <threads.h>
  62 
  63 \fBint\fR \fBthrd_sleep\fR(\fBconst struct timespec *\fR\fIrqtp\fR,
  64      \fBstruct timespec *\fR\fIrmtp\fR);
  65 
  66 .SH DESCRIPTION
  67 .LP
  68 The \fBnanosleep()\fR and \fBthrd_sleep()\fR functions cause the current thread
  69 to be suspended from execution until either the time interval specified by the
  70 \fIrqtp\fR argument has elapsed or a signal is delivered to the calling thread
  71 and its action is to invoke a signal-catching function or to terminate the
  72 process. The suspension time may be longer than requested because the argument
  73 value is rounded up to an integer multiple of the sleep resolution or because of
  74 the scheduling of other activity by the system. But, except for the case of
  75 being interrupted by a signal, the suspension time will not be less than the
  76 time specified by \fIrqtp\fR, as measured by the system clock,
  77 \fBCLOCK_REALTIME\fR.
  78 .sp
  79 .LP
  80 The use of the \fBnanosleep()\fR and \fBthrd_sleep()\fR functions has no effect
  81 on the action or blockage of any signal.
  82 .SH RETURN VALUES
  83 .LP
  84 If the \fBnanosleep()\fR or \fBthrd_sleep()\fR function returns because the
  85 requested time has elapsed, its return value is \fB0\fR.
  86 .sp
  87 .LP
  88 If the \fBnanosleep()\fR function returns because it has been interrupted by a
  89 signal, the function returns a value of \(mi1 and sets \fBerrno\fR to indicate
  90 the interruption. If the \fIrmtp\fR argument is non-\fINULL\fR, the
  91 \fBtimespec\fR structure referenced by it is updated to contain the amount of
  92 time remaining in the interval (the requested time minus the time actually
  93 slept). If the \fIrmtp\fR argument is \fINULL\fR, the remaining time is not
  94 returned.
  95 .sp
  96 .LP
  97 If \fBnanosleep()\fR fails, it returns \fB\(mi1\fR and sets \fBerrno\fR to
  98 indicate the error.
  99 .sp
 100 .LP
 101 
 102 The
 103 .B thrd_sleep()
 104 function may fail for identical reasons as the
 105 .B nanosleep()
 106 function and returns \(mi1; however, the C11 standard does not define that
 107 .B errno
 108 should be set, therefore callers of \fBthrd_sleep()\fR cannot rely on
 109 .B errno
 110 being set or staying the same across a call to
 111 .B thrd_sleep() .
 112 
 113 .SH ERRORS
 114 .LP
 115 The \fBnanosleep()\fR function will fail if:
 116 .sp
 117 .ne 2
 118 .na
 119 \fB\fBEINTR\fR\fR
 120 .ad
 121 .RS 10n
 122 The \fBnanosleep()\fR function was interrupted by a signal.
 123 .RE
 124 
 125 .sp
 126 .ne 2
 127 .na
 128 \fB\fBEINVAL\fR\fR
 129 .ad
 130 .RS 10n
 131 The \fIrqtp\fR argument specified a nanosecond value less than zero or greater
 132 than or equal to 1000 million.
 133 .RE
 134 
 135 .sp
 136 .ne 2
 137 .na
 138 \fB\fBENOSYS\fR\fR
 139 .ad
 140 .RS 10n
 141 The \fBnanosleep()\fR function is not supported by this implementation.
 142 .RE
 143 
 144 .SH ATTRIBUTES
 145 .LP
 146 See \fBattributes\fR(5) for descriptions of the following attributes:
 147 .sp
 148 
 149 .sp
 150 .TS
 151 box;
 152 c | c
 153 l | l .
 154 ATTRIBUTE TYPE  ATTRIBUTE VALUE
 155 _
 156 Interface Stability     Committed
 157 _
 158 MT-Level        MT-Safe
 159 _
 160 Standard        See \fBstandards\fR(5).
 161 .TE
 162 
 163 .SH SEE ALSO
 164 .LP
 165 \fBsleep\fR(3C), \fBtime.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)
--- EOF ---