📄 tty_ioctl.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/chr_drv/tty_ioctl.c</title><meta http-equiv=Content-Type content="text/html; charset=gb2312"><base href="http://oldlinux.org/lxr/http/"></head><body bgcolor=white><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/chr_drv/tty_ioctl.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>]</div><h1 align=center> <a href="http:/"> OldLinux</a> <a href="http:blurb.html"> 交叉引用</a><br> <a href="source/">Linux</a>/<a href="source/kernel/">kernel</a>/<a href="source/kernel/chr_drv/">chr_drv</a>/<a href="source/kernel/chr_drv/tty_ioctl.c">tty_ioctl.c</a></h1><div align=center> <b>版本:</b> [<a href="source/kernel/chr_drv/tty_ioctl.c?v=1.0">1.0</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.99">0.99</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.97">0.97</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.96a">0.96a</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.95">0.95</a>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/chr_drv/tty_ioctl.c?v=0.01">0.01</a>] <br> <b>体系结构:</b> [<b><i>i386</i></b>] <br></div><hr><pre> <a name=L1 href="source/kernel/chr_drv/tty_ioctl.c#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/chr_drv/tty_ioctl.c#L2">2</a> <b><i> * linux/kernel/chr_drv/tty_ioctl.c</i></b> <a name=L3 href="source/kernel/chr_drv/tty_ioctl.c#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/chr_drv/tty_ioctl.c#L4">4</a> <b><i> * (C) 1991 Linus Torvalds</i></b> <a name=L5 href="source/kernel/chr_drv/tty_ioctl.c#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/chr_drv/tty_ioctl.c#L6">6</a> <a name=L7 href="source/kernel/chr_drv/tty_ioctl.c#L7">7</a> #include <errno.h> <a name=L8 href="source/kernel/chr_drv/tty_ioctl.c#L8">8</a> #include <termios.h> <a name=L9 href="source/kernel/chr_drv/tty_ioctl.c#L9">9</a> <a name=L10 href="source/kernel/chr_drv/tty_ioctl.c#L10">10</a> #include <linux/sched.h> <a name=L11 href="source/kernel/chr_drv/tty_ioctl.c#L11">11</a> #include <linux/kernel.h> <a name=L12 href="source/kernel/chr_drv/tty_ioctl.c#L12">12</a> #include <linux/tty.h> <a name=L13 href="source/kernel/chr_drv/tty_ioctl.c#L13">13</a> <a name=L14 href="source/kernel/chr_drv/tty_ioctl.c#L14">14</a> #include <asm/io.h> <a name=L15 href="source/kernel/chr_drv/tty_ioctl.c#L15">15</a> #include <asm/segment.h> <a name=L16 href="source/kernel/chr_drv/tty_ioctl.c#L16">16</a> #include <asm/system.h> <a name=L17 href="source/kernel/chr_drv/tty_ioctl.c#L17">17</a> <a name=L18 href="source/kernel/chr_drv/tty_ioctl.c#L18">18</a> static unsigned short <a href="ident?i=quotient">quotient</a>[] = { <a name=L19 href="source/kernel/chr_drv/tty_ioctl.c#L19">19</a> 0, 2304, 1536, 1047, 857, <a name=L20 href="source/kernel/chr_drv/tty_ioctl.c#L20">20</a> 768, 576, 384, 192, 96, <a name=L21 href="source/kernel/chr_drv/tty_ioctl.c#L21">21</a> 64, 48, 24, 12, 6, 3 <a name=L22 href="source/kernel/chr_drv/tty_ioctl.c#L22">22</a> }; <a name=L23 href="source/kernel/chr_drv/tty_ioctl.c#L23">23</a> <a name=L24 href="source/kernel/chr_drv/tty_ioctl.c#L24">24</a> static void <a href="ident?i=change_speed">change_speed</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty) <a name=L25 href="source/kernel/chr_drv/tty_ioctl.c#L25">25</a> { <a name=L26 href="source/kernel/chr_drv/tty_ioctl.c#L26">26</a> unsigned short port,quot; <a name=L27 href="source/kernel/chr_drv/tty_ioctl.c#L27">27</a> <a name=L28 href="source/kernel/chr_drv/tty_ioctl.c#L28">28</a> if (!(port = tty->read_q.data)) <a name=L29 href="source/kernel/chr_drv/tty_ioctl.c#L29">29</a> return; <a name=L30 href="source/kernel/chr_drv/tty_ioctl.c#L30">30</a> quot = <a href="ident?i=quotient">quotient</a>[tty-><a href="ident?i=termios">termios</a>.c_cflag & <a href="ident?i=CBAUD">CBAUD</a>]; <a name=L31 href="source/kernel/chr_drv/tty_ioctl.c#L31">31</a> <a href="ident?i=cli">cli</a>(); <a name=L32 href="source/kernel/chr_drv/tty_ioctl.c#L32">32</a> <a href="ident?i=outb_p">outb_p</a>(0x80,port+3); <b><i>/* set DLAB */</i></b> <a name=L33 href="source/kernel/chr_drv/tty_ioctl.c#L33">33</a> <a href="ident?i=outb_p">outb_p</a>(quot & 0xff,port); <b><i>/* LS of divisor */</i></b> <a name=L34 href="source/kernel/chr_drv/tty_ioctl.c#L34">34</a> <a href="ident?i=outb_p">outb_p</a>(quot >> 8,port+1); <b><i>/* MS of divisor */</i></b> <a name=L35 href="source/kernel/chr_drv/tty_ioctl.c#L35">35</a> <a href="ident?i=outb">outb</a>(0x03,port+3); <b><i>/* reset DLAB */</i></b> <a name=L36 href="source/kernel/chr_drv/tty_ioctl.c#L36">36</a> <a href="ident?i=sti">sti</a>(); <a name=L37 href="source/kernel/chr_drv/tty_ioctl.c#L37">37</a> } <a name=L38 href="source/kernel/chr_drv/tty_ioctl.c#L38">38</a> <a name=L39 href="source/kernel/chr_drv/tty_ioctl.c#L39">39</a> static void <a href="ident?i=flush">flush</a>(struct <a href="ident?i=tty_queue">tty_queue</a> * queue) <a name=L40 href="source/kernel/chr_drv/tty_ioctl.c#L40">40</a> { <a name=L41 href="source/kernel/chr_drv/tty_ioctl.c#L41">41</a> <a href="ident?i=cli">cli</a>(); <a name=L42 href="source/kernel/chr_drv/tty_ioctl.c#L42">42</a> queue-><a href="ident?i=head">head</a> = queue->tail; <a name=L43 href="source/kernel/chr_drv/tty_ioctl.c#L43">43</a> <a href="ident?i=sti">sti</a>(); <a name=L44 href="source/kernel/chr_drv/tty_ioctl.c#L44">44</a> } <a name=L45 href="source/kernel/chr_drv/tty_ioctl.c#L45">45</a> <a name=L46 href="source/kernel/chr_drv/tty_ioctl.c#L46">46</a> static void <a href="ident?i=wait_until_sent">wait_until_sent</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty) <a name=L47 href="source/kernel/chr_drv/tty_ioctl.c#L47">47</a> { <a name=L48 href="source/kernel/chr_drv/tty_ioctl.c#L48">48</a> <b><i>/* do nothing - not implemented */</i></b> <a name=L49 href="source/kernel/chr_drv/tty_ioctl.c#L49">49</a> } <a name=L50 href="source/kernel/chr_drv/tty_ioctl.c#L50">50</a> <a name=L51 href="source/kernel/chr_drv/tty_ioctl.c#L51">51</a> static void <a href="ident?i=send_break">send_break</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty) <a name=L52 href="source/kernel/chr_drv/tty_ioctl.c#L52">52</a> { <a name=L53 href="source/kernel/chr_drv/tty_ioctl.c#L53">53</a> <b><i>/* do nothing - not implemented */</i></b> <a name=L54 href="source/kernel/chr_drv/tty_ioctl.c#L54">54</a> } <a name=L55 href="source/kernel/chr_drv/tty_ioctl.c#L55">55</a> <a name=L56 href="source/kernel/chr_drv/tty_ioctl.c#L56">56</a> static int <a href="ident?i=get_termios">get_termios</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty, struct <a href="ident?i=termios">termios</a> * <a href="ident?i=termios">termios</a>) <a name=L57 href="source/kernel/chr_drv/tty_ioctl.c#L57">57</a> { <a name=L58 href="source/kernel/chr_drv/tty_ioctl.c#L58">58</a> int i; <a name=L59 href="source/kernel/chr_drv/tty_ioctl.c#L59">59</a> <a name=L60 href="source/kernel/chr_drv/tty_ioctl.c#L60">60</a> <a href="ident?i=verify_area">verify_area</a>(<a href="ident?i=termios">termios</a>, sizeof (*<a href="ident?i=termios">termios</a>)); <a name=L61 href="source/kernel/chr_drv/tty_ioctl.c#L61">61</a> for (i=0 ; i< (sizeof (*<a href="ident?i=termios">termios</a>)) ; i++) <a name=L62 href="source/kernel/chr_drv/tty_ioctl.c#L62">62</a> <a href="ident?i=put_fs_byte">put_fs_byte</a>( ((char *)&tty-><a href="ident?i=termios">termios</a>)[i] , i+(char *)<a href="ident?i=termios">termios</a> ); <a name=L63 href="source/kernel/chr_drv/tty_ioctl.c#L63">63</a> return 0; <a name=L64 href="source/kernel/chr_drv/tty_ioctl.c#L64">64</a> } <a name=L65 href="source/kernel/chr_drv/tty_ioctl.c#L65">65</a> <a name=L66 href="source/kernel/chr_drv/tty_ioctl.c#L66">66</a> static int <a href="ident?i=set_termios">set_termios</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty, struct <a href="ident?i=termios">termios</a> * <a href="ident?i=termios">termios</a>) <a name=L67 href="source/kernel/chr_drv/tty_ioctl.c#L67">67</a> { <a name=L68 href="source/kernel/chr_drv/tty_ioctl.c#L68">68</a> int i; <a name=L69 href="source/kernel/chr_drv/tty_ioctl.c#L69">69</a> <a name=L70 href="source/kernel/chr_drv/tty_ioctl.c#L70">70</a> for (i=0 ; i< (sizeof (*<a href="ident?i=termios">termios</a>)) ; i++) <a name=L71 href="source/kernel/chr_drv/tty_ioctl.c#L71">71</a> ((char *)&tty-><a href="ident?i=termios">termios</a>)[i]=<a href="ident?i=get_fs_byte">get_fs_byte</a>(i+(char *)<a href="ident?i=termios">termios</a>); <a name=L72 href="source/kernel/chr_drv/tty_ioctl.c#L72">72</a> <a href="ident?i=change_speed">change_speed</a>(tty); <a name=L73 href="source/kernel/chr_drv/tty_ioctl.c#L73">73</a> return 0; <a name=L74 href="source/kernel/chr_drv/tty_ioctl.c#L74">74</a> } <a name=L75 href="source/kernel/chr_drv/tty_ioctl.c#L75">75</a> <a name=L76 href="source/kernel/chr_drv/tty_ioctl.c#L76">76</a> static int <a href="ident?i=get_termio">get_termio</a>(struct <a href="ident?i=tty_struct">tty_struct</a> * tty, struct <a href="ident?i=termio">termio</a> * <a href="ident?i=termio">termio</a>) <a name=L77 href="source/kernel/chr_drv/tty_ioctl.c#L77">77</a> { <a name=L78 href="source/kernel/chr_drv/tty_ioctl.c#L78">78</a> int i; <a name=L79 href="source/kernel/chr_drv/tty_ioctl.c#L79">79</a> struct <a href="ident?i=termio">termio</a> tmp_termio; <a name=L80 href="source/kernel/chr_drv/tty_ioctl.c#L80">80</a> <a name=L81 href="source/kernel/chr_drv/tty_ioctl.c#L81">81</a> <a href="ident?i=verify_area">verify_area</a>(<a href="ident?i=termio">termio</a>, sizeof (*<a href="ident?i=termio">termio</a>)); <a name=L82 href="source/kernel/chr_drv/tty_ioctl.c#L82">82</a> tmp_termio.c_iflag = tty-><a href="ident?i=termios">termios</a>.c_iflag; <a name=L83 href="source/kernel/chr_drv/tty_ioctl.c#L83">83</a> tmp_termio.c_oflag = tty-><a href="ident?i=termios">termios</a>.c_oflag; <a name=L84 href="source/kernel/chr_drv/tty_ioctl.c#L84">84</a> tmp_termio.c_cflag = tty-><a href="ident?i=termios">termios</a>.c_cflag; <a name=L85 href="source/kernel/chr_drv/tty_ioctl.c#L85">85</a> tmp_termio.c_lflag = tty-><a href="ident?i=termios">termios</a>.c_lflag; <a name=L86 href="source/kernel/chr_drv/tty_ioctl.c#L86">86</a> tmp_termio.c_line = tty-><a href="ident?i=termios">termios</a>.c_line; <a name=L87 href="source/kernel/chr_drv/tty_ioctl.c#L87">87</a> for(i=0 ; i < <a href="ident?i=NCC">NCC</a> ; i++) <a name=L88 href="source/kernel/chr_drv/tty_ioctl.c#L88">88</a> tmp_termio.c_cc[i] = tty-><a href="ident?i=termios">termios</a>.c_cc[i]; <a name=L89 href="source/kernel/chr_drv/tty_ioctl.c#L89">89</a> for (i=0 ; i< (sizeof (*<a href="ident?i=termio">termio</a>)) ; i++) <a name=L90 href="source/kernel/chr_drv/tty_ioctl.c#L90">90</a> <a href="ident?i=put_fs_byte">put_fs_byte</a>( ((char *)&tmp_termio)[i] , i+(char *)<a href="ident?i=termio">termio</a> ); <a name=L91 href="source/kernel/chr_drv/tty_ioctl.c#L91">91</a> return 0; <a name=L92 href="source/kernel/chr_drv/tty_ioctl.c#L92">92</a> }⌨️ 快捷键说明
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