Re^2: Using IO::File to redirect STDOUT

Quoting from the book "Network Programming with Perl" by Lincoln D. Stein (pp 29 - 30):

'When you load IO::File (technically, when IO::File loads IO::Handle, which it inherits from), it adds methods to ordinary filehandles. This means that any of the methods in IO::File can also be used with STDIN, STDOUT, STDERR or even with any of the conventional filehandles that you happen to create'.

Is the book incorrect or am I missing something?

njcodewarrior

Comment on Re^2: Using IO::File to redirect STDOUT

Replies are listed 'Best First'.
Re^3: Using IO::File to redirect STDOUT by ikegami (Patriarch) on May 08, 2006 at 13:24 UTC
That's wrong. "This means that any of the methods in IO::File" should read "This means that any of the methods in IO::Handle" The following are methods IO::File has, but IO::Handle does not: `open` `binmode` `seek` `sysseek` `tell`	[reply] [d/l] [select]
Re^4: Using IO::File to redirect STDOUT by njcodewarrior (Pilgrim) on May 09, 2006 at 01:31 UTC
Okay, bear with me as I'm more confused than ever. Here's another piece directly from the text (pp 30 - 31): "...$result = $fh->open($filename,[,$mode [,$perms]]) You can reopen a filehandle object on the indicated file by using its `open()` method. The input arguments are identical to `new()`. The method result indicates wheter the open was successful. This is chiefly used for reopening the standard filehandles STDOUT, STDIN, and STDERR. For example: `STDOUT->open(">log.txt") or die "Can't reopen STDOUT: $!";` [download] Calls to `print()` will now write to the file log.txt...." This is also incorrect? Thanks again for the help, njcodewarrior	[reply] [d/l] [select]
Re^5: Using IO::File to redirect STDOUT by ikegami (Patriarch) on May 09, 2006 at 02:08 UTC
That's the code you had in your OP. As you know, that doesn't work.	[reply]
Re^4: Using IO::File to redirect STDOUT by adamk (Chaplain) on May 09, 2006 at 00:04 UTC
Although of course in the case of seek/tell/sysseek it is because IO::Handle is _also_ not an IO::Seekable object. @IO::File::ISA = qw{ IO::Handle IO::Seekable };	[reply]