IO::Stty(3)						User Contributed Perl Documentation					       IO::Stty(3)

NAME

       Change and print terminal line settings

SYNOPSIS

	   # calling the script directly
	   stty.pl [setting...]
	   stty.pl {-a,-g,-v,--version}

	   # Calling Stty module
	   use IO::Stty;
	   IO::Stty::stty(*TTYHANDLE, @modes);

	    use IO::Stty;
	    $old_mode=IO::Stty::stty(*STDIN,'-g');

	    # Turn off echoing.
	    IO::Stty::stty(*STDIN,'-echo');

	    # Do whatever.. grab input maybe?
	    $read_password = <>;

	    # Now restore the old mode.
	    IO::Stty::stty(*STDIN,$old_mode);

	    # What settings do we have anyway?
	    print IO::Stty::stty(*STDIN,'-a');

DESCRIPTION

       This is the PERL POSIX compliant stty.

INTRO

       This has not been tailored to the IO::File stuff but will work with it as indicated. Before you go futzing with term parameters it's a good
       idea to grab the current settings and restore them when you finish.

       stty accepts the following non-option arguments that change aspects of the terminal line operation. A `[-]' before a capability means that
       it can be turned off by preceding it with a `-'.

stty parameters
   Control settings
       [-]parenb
	   Generate parity bit in output and expect parity bit in input.

       [-]parodd
	   Set odd parity (even with `-').

       cs5 cs6 cs7 cs8
	   Set character size to 5, 6, 7, or 8 bits.

       [-]hupcl [-]hup
	   Send a hangup signal when the last process closes the tty.

       [-]cstopb
	   Use two stop bits per character (one with `-').

       [-]cread
	   Allow input to be received.

       [-]clocal
	   Disable modem control signals.

   Input settings
       [-]ignbrk
	   Ignore break characters.

       [-]brkint
	   Breaks cause an interrupt signal.

       [-]ignpar
	   Ignore characters with parity errors.

       [-]parmrk
	   Mark parity errors (with a 255-0-character sequence).

       [-]inpck
	   Enable input parity checking.

       [-]istrip
	   Clear high (8th) bit of input characters.

       [-]inlcr
	   Translate newline to carriage return.

       [-]igncr
	   Ignore carriage return.

       [-]icrnl
	   Translate carriage return to newline.

       [-]ixon
	   Enable XON/XOFF flow control.

       [-]ixoff
	   Enable sending of stop character when the system input buffer is almost full, and start character when it becomes almost empty again.

   Output settings
       [-]opost
	   Postprocess output.

   Local settings
       [-]isig
	   Enable interrupt, quit, and suspend special characters.

       [-]icanon
	   Enable erase, kill, werase, and rprnt special characters.

       [-]echo
	   Echo input characters.

       [-]echoe, [-]crterase
	   Echo erase characters as backspace-space-backspace.

       [-]echok
	   Echo a newline after a kill character.

       [-]echonl
	   Echo newline even if not echoing other characters.

       [-]noflsh
	   Disable flushing after interrupt and quit special characters.

	   * Though this claims non-posixhood it is supported by the perl POSIX.pm.

       [-]tostop (np)
	   Stop background jobs that try to write to the terminal.

   Combination settings
       ek  Reset the erase and kill special characters to their default values.

       sane
	   Same as:

	       cread -ignbrk brkint -inlcr -igncr icrnl -ixoff opost
	       isig icanon echo echoe echok -echonl -noflsh -tostop

	   also sets all special characters to their default values.

       [-]cooked
	   Same as:

	       brkint ignpar istrip icrnl ixon opost isig icanon

	   plus sets the eof and eol characters to their default values if they are the same as the min and time characters.  With `-', same as
	   raw.

       [-]raw
	   Same as:

	       -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr
	       -icrnl -ixon -ixoff -opost -isig -icanon min 1 time 0

	   With `-', same as cooked.

       [-]pass8
	   Same as:

	       -parenb -istrip cs8

	   With  `-',  same  as parenb istrip cs7.

       dec Same as:

	       echoe echoctl echoke -ixany

	   Also sets the interrupt special character to Ctrl-C, erase to Del, and kill to Ctrl-U.

   Special characters
       The special characters' default values vary from system to system. They are set with the syntax `name value', where the names are listed
       below and the value can be given either literally, in hat notation (`^c'), or as an integer which may start with `0x' to indicate
       hexadecimal, `0' to indicate octal, or any other digit to indicate decimal.  Giving a value of `^-' or `undef' disables that special
       character.

       intr
	   Send an interrupt signal.

       quit
	   Send a quit signal.

       erase
	   Erase the last character typed.

       kill
	   Erase the current line.

       eof Send an end of file (terminate the input).

       eol End the line.

       start
	   Restart the output after stopping it.

       stop
	   Stop the output.

       susp
	   Send a terminal stop signal.

   Special settings
       min N
	   Set the minimum number of characters that will satisfy a read until the time value has expired,  when <E>-icanon<E> is set.

       time N
	   Set the number of tenths of a second before reads time out if the min number of characters  have  not been read, when -icanon is set.

       N   Set the input and output speeds to N.  N can be one of: 0 50 75 110 134 134.5 150 200 300 600 1200 1800 2400 4800 9600 19200 38400 exta
	   extb.  exta is  the same  as 19200; extb is the same as 38400.  0 hangs up the line if -clocal is set.

   OPTIONS
       -a  Print all current settings in human-readable  form.

       -g  Print all current settings in a form  that  can  be used  as  an  argument  to  another stty command to restore the current settings.

       -v,--version
	   Print version info.

Direct Subroutines
       stty()
	       IO::Stty::stty(*STDIN, @params);

	   From comments:

	       I'm not feeling very inspired about this. Terminal parameters are obscure
	       and boring. Basically what this will do is get the current setting,
	       take the parameters, modify the setting and write it back. Zzzz.
	       This is not especially efficent and probably not too fast. Assuming the POSIX
	       spec has been implemented properly it should mostly work.

       show_me_the_crap()
	   Needs documentation

AUTHOR

       Austin Schutz <auschutz@cpan.org> (Initial version and maintenance)

       Todd Rinaldo <toddr@cpan.org> (Maintenance)

BUGS

       This is use at your own risk software. Do anything you want with it except blame me for it blowing up your machine because it's full of
       bugs.

       See above for what functions are supported. It's mostly standard POSIX stuff. If any of the settings are wrong and you actually know what
       some of these extremely arcane settings (like what 'sane' should be in POSIX land) really should be, please open an RT ticket.

ACKNOWLEDGEMENTS

       None

COPYRIGHT &; LICENSE
       Copyright 1997 Austin Schutz, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2017-10-06							       IO::Stty(3)