1IO::Stty(3)           User Contributed Perl Documentation          IO::Stty(3)
2
3
4

NAME

6       IO::Stty - Change and print terminal line settings
7

SYNOPSIS

9           # calling the script directly
10           stty.pl [setting...]
11           stty.pl {-a,-g,-v,--version}
12
13           # Calling Stty module
14           use IO::Stty;
15           IO::Stty::stty(\*TTYHANDLE, @modes);
16
17            use IO::Stty;
18            $old_mode=IO::Stty::stty(\*STDIN,'-g');
19
20            # Turn off echoing.
21            IO::Stty::stty(\*STDIN,'-echo');
22
23            # Do whatever.. grab input maybe?
24            $read_password = <>;
25
26            # Now restore the old mode.
27            IO::Stty::stty(\*STDIN,$old_mode);
28
29            # What settings do we have anyway?
30            print IO::Stty::stty(\*STDIN,'-a');
31

DESCRIPTION

33       This is the PERL POSIX compliant stty.
34

INTRO

36       This has not been tailored to the IO::File stuff but will work with it
37       as indicated. Before you go futzing with term parameters it's a good
38       idea to grab the current settings and restore them when you finish.
39
40       stty accepts the following non-option arguments that change aspects of
41       the terminal line operation. A `[-]' before a capability means that it
42       can be turned off by preceding it with a `-'.
43

stty parameters

45   Control settings
46       [-]parenb
47           Generate parity bit in output and expect parity bit in input.
48
49       [-]parodd
50           Set odd parity (even with `-').
51
52       cs5 cs6 cs7 cs8
53           Set character size to 5, 6, 7, or 8 bits.
54
55       [-]hupcl [-]hup
56           Send a hangup signal when the last process closes the tty.
57
58       [-]cstopb
59           Use two stop bits per character (one with `-').
60
61       [-]cread
62           Allow input to be received.
63
64       [-]clocal
65           Disable modem control signals.
66
67   Input settings
68       [-]ignbrk
69           Ignore break characters.
70
71       [-]brkint
72           Breaks cause an interrupt signal.
73
74       [-]ignpar
75           Ignore characters with parity errors.
76
77       [-]parmrk
78           Mark parity errors (with a 255-0-character sequence).
79
80       [-]inpck
81           Enable input parity checking.
82
83       [-]istrip
84           Clear high (8th) bit of input characters.
85
86       [-]inlcr
87           Translate newline to carriage return.
88
89       [-]igncr
90           Ignore carriage return.
91
92       [-]icrnl
93           Translate carriage return to newline.
94
95       [-]ixon
96           Enable XON/XOFF flow control.
97
98       [-]ixoff
99           Enable sending of stop character when the system input buffer is
100           almost full, and start character when it becomes almost empty
101           again.
102
103   Output settings
104       [-]opost
105           Postprocess output.
106
107   Local settings
108       [-]isig
109           Enable interrupt, quit, and suspend special characters.
110
111       [-]icanon
112           Enable erase, kill, werase, and rprnt special characters.
113
114       [-]echo
115           Echo input characters.
116
117       [-]echoe, [-]crterase
118           Echo erase characters as backspace-space-backspace.
119
120       [-]echok
121           Echo a newline after a kill character.
122
123       [-]echonl
124           Echo newline even if not echoing other characters.
125
126       [-]noflsh
127           Disable flushing after interrupt and quit special characters.
128
129           * Though this claims non-posixhood it is supported by the perl
130           POSIX.pm.
131
132       [-]tostop (np)
133           Stop background jobs that try to write to the terminal.
134
135   Combination settings
136       ek  Reset the erase and kill special characters to their default
137           values.
138
139       sane
140           Same as:
141
142               cread -ignbrk brkint -inlcr -igncr icrnl -ixoff opost
143               isig icanon echo echoe echok -echonl -noflsh -tostop
144
145           also sets all special characters to their default values.
146
147       [-]cooked
148           Same as:
149
150               brkint ignpar istrip icrnl ixon opost isig icanon
151
152           plus sets the eof and eol characters to their default values if
153           they are the same as the min and time characters.  With `-', same
154           as raw.
155
156       [-]raw
157           Same as:
158
159               -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr
160               -icrnl -ixon -ixoff -opost -isig -icanon min 1 time 0
161
162           With `-', same as cooked.
163
164       [-]pass8
165           Same as:
166
167               -parenb -istrip cs8
168
169           With  `-',  same  as parenb istrip cs7.
170
171       dec Same as:
172
173               echoe echoctl echoke -ixany
174
175           Also sets the interrupt special character to Ctrl-C, erase to Del,
176           and kill to Ctrl-U.
177
178   Special characters
179       The special characters' default values vary from system to system. They
180       are set with the syntax `name value', where the names are listed below
181       and the value can be given either literally, in hat notation (`^c'), or
182       as an integer which may start with `0x' to indicate hexadecimal, `0' to
183       indicate octal, or any other digit to indicate decimal.  Giving a value
184       of `^-' or `undef' disables that special character.
185
186       intr
187           Send an interrupt signal.
188
189       quit
190           Send a quit signal.
191
192       erase
193           Erase the last character typed.
194
195       kill
196           Erase the current line.
197
198       eof Send an end of file (terminate the input).
199
200       eol End the line.
201
202       start
203           Restart the output after stopping it.
204
205       stop
206           Stop the output.
207
208       susp
209           Send a terminal stop signal.
210
211   Special settings
212       min N
213           Set the minimum number of characters that will satisfy a read until
214           the time value has expired,  when <E>-icanon<E> is set.
215
216       time N
217           Set the number of tenths of a second before reads time out if the
218           min number of characters  have  not been read, when -icanon is set.
219
220       N   Set the input and output speeds to N.  N can be one of: 0 50 75 110
221           134 134.5 150 200 300 600 1200 1800 2400 4800 9600 19200 38400 exta
222           extb.  exta is  the same  as 19200; extb is the same as 38400.  0
223           hangs up the line if -clocal is set.
224
225   OPTIONS
226       -a  Print all current settings in human-readable  form.
227
228       -g  Print all current settings in a form  that  can  be used  as  an
229           argument  to  another stty command to restore the current settings.
230
231       -v,--version
232           Print version info.
233

Direct Subroutines

235       stty()
236               IO::Stty::stty(\*STDIN, @params);
237
238           From comments:
239
240               I'm not feeling very inspired about this. Terminal parameters are obscure
241               and boring. Basically what this will do is get the current setting,
242               take the parameters, modify the setting and write it back. Zzzz.
243               This is not especially efficent and probably not too fast. Assuming the POSIX
244               spec has been implemented properly it should mostly work.
245
246       show_me_the_crap()
247           Needs documentation
248

AUTHOR

250       Austin Schutz <auschutz@cpan.org> (Initial version and maintenance)
251
252       Todd Rinaldo <toddr@cpan.org> (Maintenance)
253

BUGS

255       This is use at your own risk software. Do anything you want with it
256       except blame me for it blowing up your machine because it's full of
257       bugs.
258
259       See above for what functions are supported. It's mostly standard POSIX
260       stuff. If any of the settings are wrong and you actually know what some
261       of these extremely arcane settings (like what 'sane' should be in POSIX
262       land) really should be, please open an RT ticket.
263

ACKNOWLEDGEMENTS

265       None
266
268       Copyright 1997 Austin Schutz, all rights reserved.
269
270       This program is free software; you can redistribute it and/or modify it
271       under the same terms as Perl itself.
272
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274
275perl v5.34.0                      2021-07-22                       IO::Stty(3)
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