6 files changed, 12 insertions, 30 deletions
diff --git a/lib/libc/sys/acct.2 b/lib/libc/sys/acct.2
index 1119bbe..4f371d3 100644
--- a/lib/libc/sys/acct.2
+++ b/lib/libc/sys/acct.2
@@ -51,9 +51,7 @@ system call enables or disables the collection of system accounting
 records.
 If the argument
 .Fa file
-is a
-.Dv NULL
-pointer, accounting is disabled.
+is a null pointer, accounting is disabled.
 If
 .Fa file
 is an
diff --git a/lib/libc/sys/adjtime.2 b/lib/libc/sys/adjtime.2
index a5f873e..5794a32 100644
--- a/lib/libc/sys/adjtime.2
+++ b/lib/libc/sys/adjtime.2
@@ -72,9 +72,7 @@ may not be finished when
 is called again.
 If
 .Fa olddelta
-is not a
-.Dv NULL
-pointer,
+is not a null pointer,
 the structure pointed to will contain, upon return, the
 number of microseconds still to be corrected
 from the earlier call.
diff --git a/lib/libc/sys/aio_suspend.2 b/lib/libc/sys/aio_suspend.2
index 77d8ec5..db704f1 100644
--- a/lib/libc/sys/aio_suspend.2
+++ b/lib/libc/sys/aio_suspend.2
@@ -52,18 +52,14 @@ is an array of
 .Fa niocb
 pointers to asynchronous I/O requests.
 Array members containing
-NULL will be silently ignored.
+null pointers will be silently ignored.
 .Pp
 If
 .Fa timeout
-is not a
-.Dv NULL
-pointer, it specifies a maximum interval to suspend.
+is not a null pointer, it specifies a maximum interval to suspend.
 If
 .Fa timeout
-is a
-.Dv NULL
-pointer, the suspend blocks indefinitely.
+is a null pointer, the suspend blocks indefinitely.
 To effect a
 poll, the
 .Fa timeout
diff --git a/lib/libc/sys/getitimer.2 b/lib/libc/sys/getitimer.2
index 2efb0f8..90f4977 100644
--- a/lib/libc/sys/getitimer.2
+++ b/lib/libc/sys/getitimer.2
@@ -66,9 +66,7 @@ system call sets a timer to the specified
 .Fa value
 (returning the previous value of the timer if
 .Fa ovalue
-is not a
-.Dv NULL
-pointer).
+is not a null pointer).
 .Pp
 A timer value is defined by the
 .Fa itimerval
diff --git a/lib/libc/sys/recv.2 b/lib/libc/sys/recv.2
index 8c3e1b6..6833a59 100644
--- a/lib/libc/sys/recv.2
+++ b/lib/libc/sys/recv.2
@@ -63,8 +63,7 @@ it is connection-oriented.
 .Pp
 If
 .Fa from
-is not
-.Dv NULL ,
+is not a null pointer
 and the socket is not connection-oriented,
 the source address of the message is filled in.
 The
@@ -85,7 +84,7 @@ socket (see
 and is identical to
 .Fn recvfrom
 with a
-.Dv NULL
+null pointer passed as its
 .Fa from
 argument.
 As it is redundant, it may not be supported in future releases.
diff --git a/lib/libc/sys/select.2 b/lib/libc/sys/select.2
index 193c903..d90d521 100644
--- a/lib/libc/sys/select.2
+++ b/lib/libc/sys/select.2
@@ -108,23 +108,18 @@ to the maximum number of descriptors supported by the system.
 .Pp
 If
 .Fa timeout
-is not a
-.Dv NULL
-pointer, it specifies the maximum interval to wait for the
+is not a null pointer, it specifies the maximum interval to wait for the
 selection to complete.
 System activity can lengthen the interval by
 an indeterminate amount.
 .Pp
 If
 .Fa timeout
-is a
-.Dv NULL
-pointer, the select blocks indefinitely.
+is a null pointer, the select blocks indefinitely.
 .Pp
 To effect a poll, the
 .Fa timeout
-argument should not be
-.Dv NULL ,
+argument should not be a null pointer,
 but it should point to a zero-valued timeval structure.
 .Pp
 Any of
@@ -132,9 +127,7 @@ Any of
 .Fa writefds ,
 and
 .Fa exceptfds
-may be given as
-.Dv NULL
-pointers if no descriptors are of interest.
+may be given as null pointers if no descriptors are of interest.
 .Sh RETURN VALUES
 The
 .Fn select