getrandom.2: Minor wording fixes

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/getrandom.2

@@ -31,9 +31,9 @@ getrandom \- obtain a series of random bytes
 .sp
 .BI "int getrandom(void *"buf ", size_t " buflen ", unsigned int " flags );
 .SH DESCRIPTION
-The system call
+The
 .BR getrandom ()
-fills the buffer pointed to by
+system call fills the buffer pointed to by
 .I buf
 with up to
 .I buflen
@@ -87,7 +87,7 @@ If the number of available bytes in
 is less than requested in
 .IR buflen ,
 the call returns just the available random bytes.
-If no random byte is available, the response will depend on the
+If no random byte is available, the behavior depends on the
 presence of
 .B GRND_NONBLOCK
 in the
@@ -102,7 +102,7 @@ If the
 .B GRND_NONBLOCK
 flag is set, then
 .BR getrandom ()
-instead immediately returns -1 with
+instead immediately returns \-1 with
 .I errno
 set to
 .BR EAGAIN .
@@ -117,7 +117,7 @@ if insufficient entropy was present in the
 .IR /dev/random
 pool, or if the system call was interrupted by a signal.
 .PP
-On error, -1 is returned, and
+On error, \-1 is returned, and
 .I errno
 is set appropriately.
 .SH ERRORS
@@ -156,14 +156,14 @@ This system call is Linux-specific.
 .SS Interruption by a signal handler
 A call to
 .BR getrandom ()
-can only block when called without the
+can block only when called without the
 .B GRND_NONBLOCK
 flag.
 When reading from
 .I /dev/urandom
 .RB ( GRND_RANDOM
 is not set),
-blocking only occurs if the entropy pool has not been initialized yet.
+blocking occurs only if the entropy pool has not been initialized yet.
 When reading from
 .I /dev/random
 .RB ( GRND_RANDOM
@@ -176,16 +176,18 @@ in case of an interruption of a blocking call by a signal
 when reading from
 .I /dev/urandom
 depends on the initialization state of the entropy buffer
-and on the request size
+and on the request size,
 .IR buflen .
 If the entropy is not yet initialized or the request size is large
 .RI ( buflen "\ >\ 256),"
+then the call will fail with the
 .B EINTR
-will be returned.
+error.
 If the entropy pool has been initialized and the request size is small
 .RI ( buflen "\ <=\ 256),"
+then
 .BR getrandom ()
-will not return
+will not fail with
 .BR EINTR .
 Instead, it will return all of the bytes that have been requested.
 .PP
@@ -258,15 +260,15 @@ getentropy(void *buf, size_t buflen)
         return 0;
 failure:
     errno = EIO;
-    return -1;
+    return \-1;
 }
 .fi
 .in
 .SH BUGS
 As of Linux 3.19, the following bug exists:
-.PP
 .\" FIXME patch proposed https://lkml.org/lkml/2014/11/29/16
-Depending on CPU load
+.IP * 3
+Depending on CPU load,
 .BR getrandom ()
 does not react to interrupts before reading all bytes requested.
 .SH SEE ALSO