📄 pty.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/chr_drv/pty.c</title><base href="http://oldlinux.org/lxr/http/"></head><body bgcolor=white><div align=center> [<b><i>source navigation</i></b>] [<a href="diff/kernel/chr_drv/pty.c?v=0.97">diff markup</a>] [<a href="ident?v=0.97">identifier search</a>] [<a href="search?v=0.97">freetext search</a>] [<a href="find?v=0.97">file search</a>]</div><h1 align=center> <a href="http:/"> Oldlinux</a> <a href="http:blurb.html"> Cross Reference</a><br> <a href="source/?v=0.97">Linux</a>/<a href="source/kernel/?v=0.97">kernel</a>/<a href="source/kernel/chr_drv/?v=0.97">chr_drv</a>/<a href="source/kernel/chr_drv/pty.c?v=0.97">pty.c</a></h1><div align=center> <b>Version:</b> [<a href="source/kernel/chr_drv/pty.c?v=1.0">1.0</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.99">0.99</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.98">0.98</a>] [<b><i>0.97</i></b>] [<a href="source/kernel/chr_drv/pty.c?v=0.96a">0.96a</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.95">0.95</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.12">0.12</a>] [<a href="source/kernel/chr_drv/pty.c">0.11</a>] [<a href="source/kernel/chr_drv/pty.c?v=0.01">0.01</a>] <br> <b>Architecture:</b> [<b><i>i386</i></b>] <br></div><hr><pre> <a name=L1 href="source/kernel/chr_drv/pty.c?v=0.97#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/chr_drv/pty.c?v=0.97#L2">2</a> <b><i> * linux/kernel/chr_drv/pty.c</i></b> <a name=L3 href="source/kernel/chr_drv/pty.c?v=0.97#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/chr_drv/pty.c?v=0.97#L4">4</a> <b><i> * Copyright (C) 1991, 1992 Linus Torvalds</i></b> <a name=L5 href="source/kernel/chr_drv/pty.c?v=0.97#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/chr_drv/pty.c?v=0.97#L6">6</a> <a name=L7 href="source/kernel/chr_drv/pty.c?v=0.97#L7">7</a> <b><i>/*</i></b> <a name=L8 href="source/kernel/chr_drv/pty.c?v=0.97#L8">8</a> <b><i> * pty.c</i></b> <a name=L9 href="source/kernel/chr_drv/pty.c?v=0.97#L9">9</a> <b><i> *</i></b> <a name=L10 href="source/kernel/chr_drv/pty.c?v=0.97#L10">10</a> <b><i> * This module implements the pty functions</i></b> <a name=L11 href="source/kernel/chr_drv/pty.c?v=0.97#L11">11</a> <b><i> * void mpty_write(struct tty_struct * queue);</i></b> <a name=L12 href="source/kernel/chr_drv/pty.c?v=0.97#L12">12</a> <b><i> * void spty_write(struct tty_struct * queue);</i></b> <a name=L13 href="source/kernel/chr_drv/pty.c?v=0.97#L13">13</a> <b><i> */</i></b> <a name=L14 href="source/kernel/chr_drv/pty.c?v=0.97#L14">14</a> <a name=L15 href="source/kernel/chr_drv/pty.c?v=0.97#L15">15</a> #include <linux/errno.h> <a name=L16 href="source/kernel/chr_drv/pty.c?v=0.97#L16">16</a> #include <linux/sched.h> <a name=L17 href="source/kernel/chr_drv/pty.c?v=0.97#L17">17</a> #include <linux/tty.h> <a name=L18 href="source/kernel/chr_drv/pty.c?v=0.97#L18">18</a> #include <linux/fcntl.h> <a name=L19 href="source/kernel/chr_drv/pty.c?v=0.97#L19">19</a> <a name=L20 href="source/kernel/chr_drv/pty.c?v=0.97#L20">20</a> #include <asm/system.h> <a name=L21 href="source/kernel/chr_drv/pty.c?v=0.97#L21">21</a> #include <asm/io.h> <a name=L22 href="source/kernel/chr_drv/pty.c?v=0.97#L22">22</a> <a name=L23 href="source/kernel/chr_drv/pty.c?v=0.97#L23">23</a> int <a href="ident?v=0.97;i=pty_open">pty_open</a>(unsigned int dev, struct <a href="ident?v=0.97;i=file">file</a> * filp) <a name=L24 href="source/kernel/chr_drv/pty.c?v=0.97#L24">24</a> { <a name=L25 href="source/kernel/chr_drv/pty.c?v=0.97#L25">25</a> struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * tty; <a name=L26 href="source/kernel/chr_drv/pty.c?v=0.97#L26">26</a> <a name=L27 href="source/kernel/chr_drv/pty.c?v=0.97#L27">27</a> tty = <a href="ident?v=0.97;i=tty_table">tty_table</a> + dev; <a name=L28 href="source/kernel/chr_drv/pty.c?v=0.97#L28">28</a> if (!tty->link) <a name=L29 href="source/kernel/chr_drv/pty.c?v=0.97#L29">29</a> return -<a href="ident?v=0.97;i=ENODEV">ENODEV</a>; <a name=L30 href="source/kernel/chr_drv/pty.c?v=0.97#L30">30</a> <a href="ident?v=0.97;i=wake_up">wake_up</a>(&tty->read_q->proc_list); <a name=L31 href="source/kernel/chr_drv/pty.c?v=0.97#L31">31</a> if (filp->f_flags & <a href="ident?v=0.97;i=O_NDELAY">O_NDELAY</a>) <a name=L32 href="source/kernel/chr_drv/pty.c?v=0.97#L32">32</a> return 0; <a name=L33 href="source/kernel/chr_drv/pty.c?v=0.97#L33">33</a> while (!tty->link-><a href="ident?v=0.97;i=count">count</a> && !(<a href="ident?v=0.97;i=current">current</a>->signal & ~current->blocked)) <a name=L34 href="source/kernel/chr_drv/pty.c?v=0.97#L34">34</a> <a href="ident?v=0.97;i=interruptible_sleep_on">interruptible_sleep_on</a>(&tty->link->read_q->proc_list); <a name=L35 href="source/kernel/chr_drv/pty.c?v=0.97#L35">35</a> if (!tty->link-><a href="ident?v=0.97;i=count">count</a>) <a name=L36 href="source/kernel/chr_drv/pty.c?v=0.97#L36">36</a> return -<a href="ident?v=0.97;i=ERESTARTSYS">ERESTARTSYS</a>; <a name=L37 href="source/kernel/chr_drv/pty.c?v=0.97#L37">37</a> return 0; <a name=L38 href="source/kernel/chr_drv/pty.c?v=0.97#L38">38</a> } <a name=L39 href="source/kernel/chr_drv/pty.c?v=0.97#L39">39</a> <a name=L40 href="source/kernel/chr_drv/pty.c?v=0.97#L40">40</a> void <a href="ident?v=0.97;i=pty_close">pty_close</a>(unsigned int dev, struct <a href="ident?v=0.97;i=file">file</a> * filp) <a name=L41 href="source/kernel/chr_drv/pty.c?v=0.97#L41">41</a> { <a name=L42 href="source/kernel/chr_drv/pty.c?v=0.97#L42">42</a> struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * tty; <a name=L43 href="source/kernel/chr_drv/pty.c?v=0.97#L43">43</a> <a name=L44 href="source/kernel/chr_drv/pty.c?v=0.97#L44">44</a> tty = <a href="ident?v=0.97;i=tty_table">tty_table</a> + dev; <a name=L45 href="source/kernel/chr_drv/pty.c?v=0.97#L45">45</a> <a href="ident?v=0.97;i=wake_up">wake_up</a>(&tty->read_q->proc_list); <a name=L46 href="source/kernel/chr_drv/pty.c?v=0.97#L46">46</a> <a href="ident?v=0.97;i=wake_up">wake_up</a>(&tty->link->write_q->proc_list); <a name=L47 href="source/kernel/chr_drv/pty.c?v=0.97#L47">47</a> if (<a href="ident?v=0.97;i=IS_A_PTY_MASTER">IS_A_PTY_MASTER</a>(dev)) { <a name=L48 href="source/kernel/chr_drv/pty.c?v=0.97#L48">48</a> if (tty->link->pgrp > 0) <a name=L49 href="source/kernel/chr_drv/pty.c?v=0.97#L49">49</a> <a href="ident?v=0.97;i=kill_pg">kill_pg</a>(tty->link->pgrp,<a href="ident?v=0.97;i=SIGHUP">SIGHUP</a>,1); <a name=L50 href="source/kernel/chr_drv/pty.c?v=0.97#L50">50</a> } <a name=L51 href="source/kernel/chr_drv/pty.c?v=0.97#L51">51</a> } <a name=L52 href="source/kernel/chr_drv/pty.c?v=0.97#L52">52</a> <a name=L53 href="source/kernel/chr_drv/pty.c?v=0.97#L53">53</a> static inline void <a href="ident?v=0.97;i=pty_copy">pty_copy</a>(struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * from, struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * to) <a name=L54 href="source/kernel/chr_drv/pty.c?v=0.97#L54">54</a> { <a name=L55 href="source/kernel/chr_drv/pty.c?v=0.97#L55">55</a> int c; <a name=L56 href="source/kernel/chr_drv/pty.c?v=0.97#L56">56</a> <a name=L57 href="source/kernel/chr_drv/pty.c?v=0.97#L57">57</a> while (!from->stopped && !<a href="ident?v=0.97;i=EMPTY">EMPTY</a>(from->write_q)) { <a name=L58 href="source/kernel/chr_drv/pty.c?v=0.97#L58">58</a> if (<a href="ident?v=0.97;i=FULL">FULL</a>(to->read_q)) { <a name=L59 href="source/kernel/chr_drv/pty.c?v=0.97#L59">59</a> if (<a href="ident?v=0.97;i=FULL">FULL</a>(to->secondary)) <a name=L60 href="source/kernel/chr_drv/pty.c?v=0.97#L60">60</a> break; <a name=L61 href="source/kernel/chr_drv/pty.c?v=0.97#L61">61</a> <a href="ident?v=0.97;i=TTY_READ_FLUSH">TTY_READ_FLUSH</a>(to); <a name=L62 href="source/kernel/chr_drv/pty.c?v=0.97#L62">62</a> continue; <a name=L63 href="source/kernel/chr_drv/pty.c?v=0.97#L63">63</a> } <a name=L64 href="source/kernel/chr_drv/pty.c?v=0.97#L64">64</a> c = <a href="ident?v=0.97;i=get_tty_queue">get_tty_queue</a>(from->write_q); <a name=L65 href="source/kernel/chr_drv/pty.c?v=0.97#L65">65</a> <a href="ident?v=0.97;i=put_tty_queue">put_tty_queue</a>(c,to->read_q); <a name=L66 href="source/kernel/chr_drv/pty.c?v=0.97#L66">66</a> if (<a href="ident?v=0.97;i=current">current</a>->signal & ~current->blocked) <a name=L67 href="source/kernel/chr_drv/pty.c?v=0.97#L67">67</a> break; <a name=L68 href="source/kernel/chr_drv/pty.c?v=0.97#L68">68</a> } <a name=L69 href="source/kernel/chr_drv/pty.c?v=0.97#L69">69</a> <a href="ident?v=0.97;i=TTY_READ_FLUSH">TTY_READ_FLUSH</a>(to); <a name=L70 href="source/kernel/chr_drv/pty.c?v=0.97#L70">70</a> <a href="ident?v=0.97;i=wake_up">wake_up</a>(&from->write_q->proc_list); <a name=L71 href="source/kernel/chr_drv/pty.c?v=0.97#L71">71</a> } <a name=L72 href="source/kernel/chr_drv/pty.c?v=0.97#L72">72</a> <a name=L73 href="source/kernel/chr_drv/pty.c?v=0.97#L73">73</a> <b><i>/*</i></b> <a name=L74 href="source/kernel/chr_drv/pty.c?v=0.97#L74">74</a> <b><i> * This routine gets called when tty_write has put something into</i></b> <a name=L75 href="source/kernel/chr_drv/pty.c?v=0.97#L75">75</a> <b><i> * the write_queue. It copies the input to the output-queue of it's</i></b> <a name=L76 href="source/kernel/chr_drv/pty.c?v=0.97#L76">76</a> <b><i> * slave.</i></b> <a name=L77 href="source/kernel/chr_drv/pty.c?v=0.97#L77">77</a> <b><i> */</i></b> <a name=L78 href="source/kernel/chr_drv/pty.c?v=0.97#L78">78</a> void <a href="ident?v=0.97;i=mpty_write">mpty_write</a>(struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * tty) <a name=L79 href="source/kernel/chr_drv/pty.c?v=0.97#L79">79</a> { <a name=L80 href="source/kernel/chr_drv/pty.c?v=0.97#L80">80</a> if (tty->link) <a name=L81 href="source/kernel/chr_drv/pty.c?v=0.97#L81">81</a> <a href="ident?v=0.97;i=pty_copy">pty_copy</a>(tty,tty->link); <a name=L82 href="source/kernel/chr_drv/pty.c?v=0.97#L82">82</a> } <a name=L83 href="source/kernel/chr_drv/pty.c?v=0.97#L83">83</a> <a name=L84 href="source/kernel/chr_drv/pty.c?v=0.97#L84">84</a> void <a href="ident?v=0.97;i=spty_write">spty_write</a>(struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> * tty) <a name=L85 href="source/kernel/chr_drv/pty.c?v=0.97#L85">85</a> { <a name=L86 href="source/kernel/chr_drv/pty.c?v=0.97#L86">86</a> if (tty->link) <a name=L87 href="source/kernel/chr_drv/pty.c?v=0.97#L87">87</a> <a href="ident?v=0.97;i=pty_copy">pty_copy</a>(tty,tty->link); <a name=L88 href="source/kernel/chr_drv/pty.c?v=0.97#L88">88</a> } <a name=L89 href="source/kernel/chr_drv/pty.c?v=0.97#L89">89</a> </pre><hr><div align=center> [<b><i>source navigation</i></b>] [<a href="diff/kernel/chr_drv/pty.c?v=0.97">diff markup</a>] [<a href="ident?v=0.97">identifier search</a>] [<a href="search?v=0.97">freetext search</a>] [<a href="find?v=0.97">file search</a>] </div><hr>This page was automatically generated by the <a href="http:blurb.html">LXR engine</a>.<br>Visit the <a href="http://lxr.linux.no/">LXR main site</a> for moreinformation.</html>⌨️ 快捷键说明
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