Make the point a bit clearer after suggestion from Merijin

[p5sagit/p5-mst-13.2.git] / pod / perlfunc.pod

diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod
index 49efec6..131d477 100644 (file)
--- a/pod/perlfunc.pod
+++ b/pod/perlfunc.pod
@@ -172,7 +172,7 @@ C<untie>, C<use>
 
 C<accept>, C<bind>, C<connect>, C<getpeername>, C<getsockname>,
 C<getsockopt>, C<listen>, C<recv>, C<send>, C<setsockopt>, C<shutdown>,
-C<sockatmark>, C<socket>, C<socketpair>
+C<socket>, C<socketpair>
 
 =item System V interprocess communication functions
 
@@ -234,7 +234,7 @@ C<msgsnd>, C<open>, C<pipe>, C<readlink>, C<rename>, C<select>, C<semctl>,
 C<semget>, C<semop>, C<setgrent>, C<sethostent>, C<setnetent>,
 C<setpgrp>, C<setpriority>, C<setprotoent>, C<setpwent>,
 C<setservent>, C<setsockopt>, C<shmctl>, C<shmget>, C<shmread>,
-C<shmwrite>, C<sockatmark>, C<socket>, C<socketpair>,
+C<shmwrite>, C<socket>, C<socketpair>,
 C<stat>, C<symlink>, C<syscall>, C<sysopen>, C<system>,
 C<times>, C<truncate>, C<umask>, C<unlink>,
 C<utime>, C<wait>, C<waitpid>
@@ -2810,7 +2810,13 @@ opens a filehandle to an anonymous temporary file.
 
 File handles can be opened to "in memory" files held in Perl scalars via:
 
-    open($fh,'>', \$variable) || ..
+    open($fh, '>', \$variable) || ..
+
+Though if you try to re-open C<STDOUT> or C<STDERR> as an "in memory"
+file, you have to close it first:
+
+    close STDOUT;
+    open STDOUT, '>', \$variable or die "Can't open STDOUT: $!";
 
 Examples:
 
@@ -4424,26 +4430,6 @@ help.
 
 See also the POSIX module's C<pause> function.
 
-=item sockatmark SOCKET
-
-Returns true if the socket is positioned at the out-of-band mark
-(also known as the urgent data mark), false otherwise.  Use right
-after reading from the socket.
-
-Not available directly, one has to import the function from
-the IO::Socket extension
-
-    use IO::Socket 'sockatmark';
-
-Even this doesn't guarantee that sockatmark() really is available,
-though, because sockatmark() is a relatively recent addition to
-the family of socket functions.  If it is unavailable, attempt to
-use it will fail
-
-       IO::Socket::atmark not implemented on this architecture ...
-
-See also L<IO::Socket>.
-
 =item socket SOCKET,DOMAIN,TYPE,PROTOCOL
 
 Opens a socket of the specified kind and attaches it to filehandle
@@ -5658,6 +5644,9 @@ specified length.  Produces a fatal error if truncate isn't implemented
 on your system.  Returns true if successful, the undefined value
 otherwise.
 
+The behavior is undefined if LENGTH is greater than the length of the
+file.
+
 =item uc EXPR
 
 =item uc