Fcntl: more O_ constants, move SEEK_ to @EXPORT_OK

(tag :seek), add S_I constants (and functions) (tag :mode);
refer only to the SEEK_ of Fcntl, not the ones from
POSIX or IO::; add SHUT_ to Socket; get trigonometric
functions from Math::Trig instead of POSIX.

p4raw-id: //depot/cfgperl@5118

1 files changed, 7 insertions, 5 deletions

diff --git a/pod/perlopentut.pod b/pod/perlopentut.pod
index fd32bd9f49..cc9cf63ff2 100644
--- a/pod/perlopentut.pod
+++ b/pod/perlopentut.pod
@@ -303,11 +303,13 @@ from the Fcntl module, which supplies the following standard flags:
     O_TRUNC             Truncate the file
     O_NONBLOCK          Non-blocking access
 
-Less common flags that are sometimes available on some operating systems
-include C<O_BINARY>, C<O_TEXT>, C<O_SHLOCK>, C<O_EXLOCK>, C<O_DEFER>,
-C<O_SYNC>, C<O_ASYNC>, C<O_DSYNC>, C<O_RSYNC>, C<O_NOCTTY>, C<O_NDELAY>
-and C<O_LARGEFILE>.  Consult your open(2) manpage or its local equivalent
-for details.
+Less common flags that are sometimes available on some operating
+systems include C<O_BINARY>, C<O_TEXT>, C<O_SHLOCK>, C<O_EXLOCK>,
+C<O_DEFER>, C<O_SYNC>, C<O_ASYNC>, C<O_DSYNC>, C<O_RSYNC>,
+C<O_NOCTTY>, C<O_NDELAY> and C<O_LARGEFILE>.  Consult your open(2)
+manpage or its local equivalent for details.  (Note: starting from
+Perl release 5.6 the O_LARGEFILE flag, if available, is automatically
+added to the sysopen() flags because large files are the the default.)
 
 Here's how to use C<sysopen> to emulate the simple C<open> calls we had
 before.  We'll omit the C<|| die $!> checks for clarity, but make sure