290 lines
6.3 KiB
HTML
290 lines
6.3 KiB
HTML
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<!DOCTYPE HTML>
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<HTML LANG="en-us"
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><HEAD
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><TITLE
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>*terminal-io* | Common Lisp Nova Spec</TITLE
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><META CHARSET="US-ASCII"
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><LINK REL="canonical" HREF="v_terminal-io.html"
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><LINK REL="next" HREF="t_stream-error.html" TYPE="text/html" TITLE="stream-error"
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><LINK REL="prev" HREF="v_debug-io.html" TYPE="text/html" TITLE="*debug-io*, *error-output*, *query-io*, *standard-input*, *standard-output*, *trace-output*"
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><LINK REL="up" HREF="21_2_Streams_Dictionary.html" TYPE="text/html" TITLE="21.2 Streams Dictionary"
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><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
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><LINK REL="STYLESHEET" HREF="dpans.css%3F3909942064.css"
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><SCRIPT SRC="dpans.js%3F3909942064"
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></SCRIPT
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><SCRIPT SRC="apropos.js%3F3909942064"
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></SCRIPT
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></HEAD
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><BODY
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><DIV
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><DIV CLASS="topnav"
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><DIV CLASS="breadcrumb"
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><SPAN CLASS="breadcrumb-item"
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><A HREF="index.html"
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>Common Lisp Nova Spec</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="21_Streams.html"
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>21. Streams</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="21_2_Streams_Dictionary.html"
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>21.2 Streams Dictionary</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="v_terminal-io.html"
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>*terminal-io*</A
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></SPAN
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></DIV
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><DIV CLASS="apropos"
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><DIV CLASS="apropos-io"
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><A HREF="v_debug-io.html" CLASS="prev"
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>←</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
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><A HREF="t_stream-error.html" CLASS="next"
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>→</A
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></DIV
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><DIV ID="apropos-res"
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></DIV
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></DIV
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></DIV
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><DIV CLASS="matter"
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><DIV CLASS="com"
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><DIV CLASS="begincom"
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><HR
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TR
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="*terminal-io*"
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></SPAN
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><SPAN CLASS="cmsy"
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>*</SPAN
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><B
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>terminal-io</B
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><SPAN CLASS="cmsy"
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>*</SPAN
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Variable</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Value Type</B
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></DT
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><DD
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><P CLASS="j"
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>a <A HREF="26_1_Glossary.html#bidirectional"
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><EM CLASS="term"
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>bidirectional</EM
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></A
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> <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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>.</P
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></DD
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><DT
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><B
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>Initial Value</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="26_1_Glossary.html#implementation-dependent"
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><EM CLASS="term"
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>implementation-dependent</EM
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></A
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>, but it must be an <A HREF="26_1_Glossary.html#open"
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><EM CLASS="term"
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>open</EM
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></A
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> <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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> that is not a <A HREF="26_1_Glossary.html#generalized_synonym_stream"
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><EM CLASS="term"
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>generalized synonym stream</EM
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></A
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> to an <A HREF="26_1_Glossary.html#I_dashO_customization_variable"
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><EM CLASS="term"
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>I/O customization variables</EM
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></A
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> but that might be a <A HREF="26_1_Glossary.html#generalized_synonym_stream"
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><EM CLASS="term"
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>generalized synonym stream</EM
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></A
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> to the <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of some <A HREF="26_1_Glossary.html#I_dashO_customization_variable"
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><EM CLASS="term"
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>I/O customization variable</EM
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></A
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>.</P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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>The <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of <A HREF="v_terminal-io.html" CLASS="misc"
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><B
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>*terminal-io*</B
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></A
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>, called <A HREF="26_1_Glossary.html#terminal_I_dashO"
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><EM CLASS="term"
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>terminal I/O</EM
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></A
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>, is ordinarily a <A HREF="26_1_Glossary.html#bidirectional"
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><EM CLASS="term"
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>bidirectional</EM
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></A
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> <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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> that connects to the user’s console. Typically, writing to this <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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> would cause the output to appear on a display screen, for example, and reading from the <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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> would accept input from a keyboard. It is intended that standard input functions such as <A HREF="f_read.html" CLASS="funref"
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><B
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>read</B
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></A
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> and <A HREF="f_read-char.html" CLASS="funref"
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><B
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>read-char</B
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></A
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>, when used with this <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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>, cause echoing of the input into the output side of the <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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>. The means by which this is accomplished are <A HREF="26_1_Glossary.html#implementation-dependent"
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><EM CLASS="term"
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>implementation-dependent</EM
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></A
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>. </P
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><P CLASS="j"
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>The effect of changing the <A HREF="26_1_Glossary.html#value"
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><EM CLASS="term"
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>value</EM
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></A
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> of <A HREF="v_terminal-io.html" CLASS="misc"
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><B
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>*terminal-io*</B
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></A
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>, either by <A HREF="26_1_Glossary.html#binding"
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><EM CLASS="term"
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>binding</EM
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></A
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> or <EM CLASS="term"
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>assignment</EM
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>, is <A HREF="26_1_Glossary.html#implementation-defined"
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><EM CLASS="term"
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>implementation-defined</EM
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></A
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>.</P
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></DD
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><DT
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><B
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>Examples</B
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></DT
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><DD
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><PRE CLASS="screen"
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> (progn (prin1 'foo) (prin1 'bar *terminal-io*))
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> FOOBAR
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> BAR
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(with-output-to-string (*standard-output*)
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(prin1 'foo)
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(prin1 'bar *terminal-io*))
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<SPAN CLASS="cmr"
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>⊳</SPAN
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> BAR
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> "FOO"</PRE
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></DD
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><DT
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><B
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>See Also</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*debug-io*</B
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></A
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>, <A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*error-output*</B
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></A
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>, <A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*query-io*</B
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></A
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>, <A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*standard-input*</B
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></A
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>, <A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*standard-output*</B
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></A
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>, <A HREF="v_debug-io.html" CLASS="varref"
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><B
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>*trace-output*</B
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></A
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></P
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><DIV CLASS="btmnav"
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><A HREF="v_debug-io.html" CLASS="prev"
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>←</A
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><A HREF="t_stream-error.html" CLASS="next"
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>→</A
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></DIV
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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></DIV
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></DIV
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><SCRIPT
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>domReady();</SCRIPT
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>
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