📄 vt.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/chr_drv/vt.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/vt.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/vt.c?v=0.97">vt.c</a></h1><div align=center> <b>Version:</b> [<a href="source/kernel/chr_drv/vt.c?v=1.0">1.0</a>] [<a href="source/kernel/chr_drv/vt.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/chr_drv/vt.c?v=0.99">0.99</a>] [<a href="source/kernel/chr_drv/vt.c?v=0.98">0.98</a>] [<b><i>0.97</i></b>] [<a href="source/kernel/chr_drv/vt.c?v=0.96a">0.96a</a>] [<a href="source/kernel/chr_drv/vt.c?v=0.95">0.95</a>] [<a href="source/kernel/chr_drv/vt.c?v=0.12">0.12</a>] [<a href="source/kernel/chr_drv/vt.c">0.11</a>] [<a href="source/kernel/chr_drv/vt.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/vt.c?v=0.97#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/chr_drv/vt.c?v=0.97#L2">2</a> <b><i> * kernel/chr_drv/vt.c</i></b> <a name=L3 href="source/kernel/chr_drv/vt.c?v=0.97#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/chr_drv/vt.c?v=0.97#L4">4</a> <b><i> * Copyright (C) 1992 obz under the linux copyright</i></b> <a name=L5 href="source/kernel/chr_drv/vt.c?v=0.97#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/chr_drv/vt.c?v=0.97#L6">6</a> <a name=L7 href="source/kernel/chr_drv/vt.c?v=0.97#L7">7</a> #include <linux/types.h> <a name=L8 href="source/kernel/chr_drv/vt.c?v=0.97#L8">8</a> #include <linux/errno.h> <a name=L9 href="source/kernel/chr_drv/vt.c?v=0.97#L9">9</a> #include <linux/sched.h> <a name=L10 href="source/kernel/chr_drv/vt.c?v=0.97#L10">10</a> #include <linux/tty.h> <a name=L11 href="source/kernel/chr_drv/vt.c?v=0.97#L11">11</a> #include <linux/timer.h> <a name=L12 href="source/kernel/chr_drv/vt.c?v=0.97#L12">12</a> #include <linux/kernel.h> <a name=L13 href="source/kernel/chr_drv/vt.c?v=0.97#L13">13</a> <a name=L14 href="source/kernel/chr_drv/vt.c?v=0.97#L14">14</a> #include <asm/io.h> <a name=L15 href="source/kernel/chr_drv/vt.c?v=0.97#L15">15</a> #include <asm/segment.h> <a name=L16 href="source/kernel/chr_drv/vt.c?v=0.97#L16">16</a> <a name=L17 href="source/kernel/chr_drv/vt.c?v=0.97#L17">17</a> #include "<a href="source/kernel/chr_drv/vt_kern.h?v=0.97">vt_kern.h</a>" <a name=L18 href="source/kernel/chr_drv/vt.c?v=0.97#L18">18</a> #include <sys/kd.h> <a name=L19 href="source/kernel/chr_drv/vt.c?v=0.97#L19">19</a> #include <sys/vt.h> <a name=L20 href="source/kernel/chr_drv/vt.c?v=0.97#L20">20</a> <a name=L21 href="source/kernel/chr_drv/vt.c?v=0.97#L21">21</a> <b><i>/*</i></b> <a name=L22 href="source/kernel/chr_drv/vt.c?v=0.97#L22">22</a> <b><i> * console (vt and kd) routines, as defined by usl svr4 manual</i></b> <a name=L23 href="source/kernel/chr_drv/vt.c?v=0.97#L23">23</a> <b><i> */</i></b> <a name=L24 href="source/kernel/chr_drv/vt.c?v=0.97#L24">24</a> <a name=L25 href="source/kernel/chr_drv/vt.c?v=0.97#L25">25</a> struct <a href="ident?v=0.97;i=vt_cons">vt_cons</a> <a href="ident?v=0.97;i=vt_cons">vt_cons</a>[<a href="ident?v=0.97;i=NR_CONSOLES">NR_CONSOLES</a>]; <a name=L26 href="source/kernel/chr_drv/vt.c?v=0.97#L26">26</a> <a name=L27 href="source/kernel/chr_drv/vt.c?v=0.97#L27">27</a> extern unsigned char <a href="ident?v=0.97;i=kleds">kleds</a>; <a name=L28 href="source/kernel/chr_drv/vt.c?v=0.97#L28">28</a> extern unsigned char <a href="ident?v=0.97;i=kraw">kraw</a>; <a name=L29 href="source/kernel/chr_drv/vt.c?v=0.97#L29">29</a> extern unsigned char <a href="ident?v=0.97;i=ke0">ke0</a>; <a name=L30 href="source/kernel/chr_drv/vt.c?v=0.97#L30">30</a> <a name=L31 href="source/kernel/chr_drv/vt.c?v=0.97#L31">31</a> extern int <a href="ident?v=0.97;i=sys_ioperm">sys_ioperm</a>(unsigned long from, unsigned long <a href="ident?v=0.97;i=num">num</a>, int on); <a name=L32 href="source/kernel/chr_drv/vt.c?v=0.97#L32">32</a> extern void <a href="ident?v=0.97;i=set_leds">set_leds</a>(void); <a name=L33 href="source/kernel/chr_drv/vt.c?v=0.97#L33">33</a> <a name=L34 href="source/kernel/chr_drv/vt.c?v=0.97#L34">34</a> <b><i>/*</i></b> <a name=L35 href="source/kernel/chr_drv/vt.c?v=0.97#L35">35</a> <b><i> * these are the valid i/o ports we're allowed to change. they map all the</i></b> <a name=L36 href="source/kernel/chr_drv/vt.c?v=0.97#L36">36</a> <b><i> * video ports</i></b> <a name=L37 href="source/kernel/chr_drv/vt.c?v=0.97#L37">37</a> <b><i> */</i></b> <a name=L38 href="source/kernel/chr_drv/vt.c?v=0.97#L38">38</a> #define <a href="ident?v=0.97;i=GPFIRST">GPFIRST</a> 0x3b4 <a name=L39 href="source/kernel/chr_drv/vt.c?v=0.97#L39">39</a> #define <a href="ident?v=0.97;i=GPLAST">GPLAST</a> 0x3df <a name=L40 href="source/kernel/chr_drv/vt.c?v=0.97#L40">40</a> #define <a href="ident?v=0.97;i=GPNUM">GPNUM</a> (<a href="ident?v=0.97;i=GPLAST">GPLAST</a> - <a href="ident?v=0.97;i=GPFIRST">GPFIRST</a> + 1) <a name=L41 href="source/kernel/chr_drv/vt.c?v=0.97#L41">41</a> <a name=L42 href="source/kernel/chr_drv/vt.c?v=0.97#L42">42</a> <b><i>/*</i></b> <a name=L43 href="source/kernel/chr_drv/vt.c?v=0.97#L43">43</a> <b><i> * turns on sound of some freq. 0 turns it off.</i></b> <a name=L44 href="source/kernel/chr_drv/vt.c?v=0.97#L44">44</a> <b><i> * stolen from console.c, so i'm not sure if its the correct interpretation</i></b> <a name=L45 href="source/kernel/chr_drv/vt.c?v=0.97#L45">45</a> <b><i> */</i></b> <a name=L46 href="source/kernel/chr_drv/vt.c?v=0.97#L46">46</a> static int <a name=L47 href="source/kernel/chr_drv/vt.c?v=0.97#L47">47</a> <a href="ident?v=0.97;i=kiocsound">kiocsound</a>(unsigned int freq) <a name=L48 href="source/kernel/chr_drv/vt.c?v=0.97#L48">48</a> { <a name=L49 href="source/kernel/chr_drv/vt.c?v=0.97#L49">49</a> if (freq == 0) { <a name=L50 href="source/kernel/chr_drv/vt.c?v=0.97#L50">50</a> <b><i>/* disable counter 2 */</i></b> <a name=L51 href="source/kernel/chr_drv/vt.c?v=0.97#L51">51</a> <a href="ident?v=0.97;i=outb">outb</a>(<a href="ident?v=0.97;i=inb_p">inb_p</a>(0x61)&0xFC, 0x61); <a name=L52 href="source/kernel/chr_drv/vt.c?v=0.97#L52">52</a> } <a name=L53 href="source/kernel/chr_drv/vt.c?v=0.97#L53">53</a> else { <a name=L54 href="source/kernel/chr_drv/vt.c?v=0.97#L54">54</a> <b><i>/* enable counter 2 */</i></b> <a name=L55 href="source/kernel/chr_drv/vt.c?v=0.97#L55">55</a> <a href="ident?v=0.97;i=outb_p">outb_p</a>(<a href="ident?v=0.97;i=inb_p">inb_p</a>(0x61)|3, 0x61); <a name=L56 href="source/kernel/chr_drv/vt.c?v=0.97#L56">56</a> <b><i>/* set command for counter 2, 2 byte write */</i></b> <a name=L57 href="source/kernel/chr_drv/vt.c?v=0.97#L57">57</a> <a href="ident?v=0.97;i=outb_p">outb_p</a>(0xB6, 0x43); <a name=L58 href="source/kernel/chr_drv/vt.c?v=0.97#L58">58</a> <b><i>/* select desired HZ */</i></b> <a name=L59 href="source/kernel/chr_drv/vt.c?v=0.97#L59">59</a> <a href="ident?v=0.97;i=outb_p">outb_p</a>(freq & 0xff, 0x42); <a name=L60 href="source/kernel/chr_drv/vt.c?v=0.97#L60">60</a> <a href="ident?v=0.97;i=outb">outb</a>((freq >> 8) & 0xff, 0x42); <a name=L61 href="source/kernel/chr_drv/vt.c?v=0.97#L61">61</a> } <a name=L62 href="source/kernel/chr_drv/vt.c?v=0.97#L62">62</a> return 0; <a name=L63 href="source/kernel/chr_drv/vt.c?v=0.97#L63">63</a> } <a name=L64 href="source/kernel/chr_drv/vt.c?v=0.97#L64">64</a> <a name=L65 href="source/kernel/chr_drv/vt.c?v=0.97#L65">65</a> <b><i>/*</i></b> <a name=L66 href="source/kernel/chr_drv/vt.c?v=0.97#L66">66</a> <b><i> * all the vt ioctls affect only consoles, so we reject all other ttys.</i></b> <a name=L67 href="source/kernel/chr_drv/vt.c?v=0.97#L67">67</a> <b><i> * we also have the capability to modify any console, not just the fg_console.</i></b> <a name=L68 href="source/kernel/chr_drv/vt.c?v=0.97#L68">68</a> <b><i> */</i></b> <a name=L69 href="source/kernel/chr_drv/vt.c?v=0.97#L69">69</a> int <a name=L70 href="source/kernel/chr_drv/vt.c?v=0.97#L70">70</a> <a href="ident?v=0.97;i=vt_ioctl">vt_ioctl</a>(struct <a href="ident?v=0.97;i=tty_struct">tty_struct</a> *tty, int dev, int cmd, int arg) <a name=L71 href="source/kernel/chr_drv/vt.c?v=0.97#L71">71</a> { <a name=L72 href="source/kernel/chr_drv/vt.c?v=0.97#L72">72</a> int console = dev ? dev - 1 : <a href="ident?v=0.97;i=fg_console">fg_console</a>; <a name=L73 href="source/kernel/chr_drv/vt.c?v=0.97#L73">73</a> unsigned char ucval; <a name=L74 href="source/kernel/chr_drv/vt.c?v=0.97#L74">74</a> <a name=L75 href="source/kernel/chr_drv/vt.c?v=0.97#L75">75</a> if (!<a href="ident?v=0.97;i=IS_A_CONSOLE">IS_A_CONSOLE</a>(dev) || console < 0 || console >= <a href="ident?v=0.97;i=NR_CONSOLES">NR_CONSOLES</a>) <a name=L76 href="source/kernel/chr_drv/vt.c?v=0.97#L76">76</a> return -<a href="ident?v=0.97;i=EINVAL">EINVAL</a>; <a name=L77 href="source/kernel/chr_drv/vt.c?v=0.97#L77">77</a> <a name=L78 href="source/kernel/chr_drv/vt.c?v=0.97#L78">78</a> switch (cmd) { <a name=L79 href="source/kernel/chr_drv/vt.c?v=0.97#L79">79</a> case <a href="ident?v=0.97;i=KIOCSOUND">KIOCSOUND</a>: <a name=L80 href="source/kernel/chr_drv/vt.c?v=0.97#L80">80</a> return <a href="ident?v=0.97;i=kiocsound">kiocsound</a>((unsigned int)arg); <a name=L81 href="source/kernel/chr_drv/vt.c?v=0.97#L81">81</a> <a name=L82 href="source/kernel/chr_drv/vt.c?v=0.97#L82">82</a> case <a href="ident?v=0.97;i=KDGKBTYPE">KDGKBTYPE</a>: <a name=L83 href="source/kernel/chr_drv/vt.c?v=0.97#L83">83</a> <b><i>/*</i></b> <a name=L84 href="source/kernel/chr_drv/vt.c?v=0.97#L84">84</a> <b><i> * this is naive.</i></b> <a name=L85 href="source/kernel/chr_drv/vt.c?v=0.97#L85">85</a> <b><i> */</i></b> <a name=L86 href="source/kernel/chr_drv/vt.c?v=0.97#L86">86</a> <a href="ident?v=0.97;i=verify_area">verify_area</a>((void *) arg, sizeof(unsigned char)); <a name=L87 href="source/kernel/chr_drv/vt.c?v=0.97#L87">87</a> <a href="ident?v=0.97;i=put_fs_byte">put_fs_byte</a>(<a href="ident?v=0.97;i=KB_101">KB_101</a>, (unsigned char *) arg); <a name=L88 href="source/kernel/chr_drv/vt.c?v=0.97#L88">88</a> return 0; <a name=L89 href="source/kernel/chr_drv/vt.c?v=0.97#L89">89</a> <a name=L90 href="source/kernel/chr_drv/vt.c?v=0.97#L90">90</a> case <a href="ident?v=0.97;i=KDADDIO">KDADDIO</a>: <a name=L91 href="source/kernel/chr_drv/vt.c?v=0.97#L91">91</a> case <a href="ident?v=0.97;i=KDDELIO">KDDELIO</a>: <a name=L92 href="source/kernel/chr_drv/vt.c?v=0.97#L92">92</a> <b><i>/*</i></b>⌨️ 快捷键说明
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