Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

io(3pm) [osx man page]

IO(3pm) 						 Perl Programmers Reference Guide						   IO(3pm)

NAME
IO - load various IO modules SYNOPSIS
use IO qw(Handle File); # loads IO modules, here IO::Handle, IO::File use IO; # DEPRECATED DESCRIPTION
"IO" provides a simple mechanism to load several of the IO modules in one go. The IO modules belonging to the core are: IO::Handle IO::Seekable IO::File IO::Pipe IO::Socket IO::Dir IO::Select IO::Poll Some other IO modules don't belong to the perl core but can be loaded as well if they have been installed from CPAN. You can discover which ones exist by searching for "^IO::" on http://search.cpan.org. For more information on any of these modules, please see its respective documentation. DEPRECATED
use IO; # loads all the modules listed below The loaded modules are IO::Handle, IO::Seekable, IO::File, IO::Pipe, IO::Socket, IO::Dir. You should instead explicitly import the IO modules you want. perl v5.16.2 2012-10-25 IO(3pm)

Check Out this Related Man Page

IO::Seekable(3pm)					 Perl Programmers Reference Guide					 IO::Seekable(3pm)

NAME
IO::Seekable - supply seek based methods for I/O objects SYNOPSIS
use IO::Seekable; package IO::Something; @ISA = qw(IO::Seekable); DESCRIPTION
"IO::Seekable" does not have a constructor of its own as it is intended to be inherited by other "IO::Handle" based objects. It provides methods which allow seeking of the file descriptors. $io->getpos Returns an opaque value that represents the current position of the IO::File, or "undef" if this is not possible (eg an unseekable stream such as a terminal, pipe or socket). If the fgetpos() function is available in your C library it is used to implements getpos, else perl emulates getpos using C's ftell() function. $io->setpos Uses the value of a previous getpos call to return to a previously visited position. Returns "0 but true" on success, "undef" on failure. See perlfunc for complete descriptions of each of the following supported "IO::Seekable" methods, which are just front ends for the corresponding built-in functions: $io->seek ( POS, WHENCE ) Seek the IO::File to position POS, relative to WHENCE: WHENCE=0 (SEEK_SET) POS is absolute position. (Seek relative to the start of the file) WHENCE=1 (SEEK_CUR) POS is an offset from the current position. (Seek relative to current) WHENCE=2 (SEEK_END) POS is an offset from the end of the file. (Seek relative to end) The SEEK_* constants can be imported from the "Fcntl" module if you don't wish to use the numbers 0 1 or 2 in your code. Returns 1 upon success, 0 otherwise. $io->sysseek( POS, WHENCE ) Similar to $io->seek, but sets the IO::File's position using the system call lseek(2) directly, so will confuse most perl IO operators except sysread and syswrite (see perlfunc for full details) Returns the new position, or "undef" on failure. A position of zero is returned as the string "0 but true" $io->tell Returns the IO::File's current position, or -1 on error. SEE ALSO
perlfunc, "I/O Operators" in perlop, IO::Handle IO::File HISTORY
Derived from FileHandle.pm by Graham Barr <gbarr@pobox.com> perl v5.18.2 2013-11-04 IO::Seekable(3pm)
Man Page

4 More Discussions You Might Find Interesting

1. What is on Your Mind?

Game: Name this person

Simple rules... 1. Guess who it is, the first person to get it posts the next picture, post your guess as a reply to this thread. 2. Wait for the person who posted the picture to confirm that you are correct before posting a new picture. 3. If the person who posted the picture does not answer... (268 Replies)
Discussion started by: reborg
268 Replies

2. What is on Your Mind?

How Many Computers Do You Have At Home?

Here is an easy one. Count the number of desktops and servers you have running at home, including your home office if you have one. Don't count those that are in storage or you rarely use, count the ones that are powered on most, if not all, of the day (and night). (86 Replies)
Discussion started by: Neo
86 Replies

3. What is on Your Mind?

What do you do for a living?

(107 Replies)
Discussion started by: ilikecows
107 Replies

4. Open Source

What editor does everyone use?

I was looking through the topics and I wasn't sure if this was the best place to post this question: I was wondering, out of curiosity, which software everyone was using to code their scripts in. I do mostly sh/ksh and my favorite has always been EditPlus because it is small, fast, yet powerful.... (409 Replies)
Discussion started by: yongho
409 Replies