📄 exit.htm
字号:
<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/exit.c</title><meta http-equiv=Content-Type content="text/html; charset=gb2312"><base href="http://oldlinux.org/lxr/http_cn/"></head><body bgcolor=white><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/exit.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/exit.c">exit.c</a></h1><div align=center> <b>版本:</b> [<a href="source/kernel/exit.c?v=1.0">1.0</a>] [<a href="source/kernel/exit.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/exit.c?v=0.99">0.99</a>] [<a href="source/kernel/exit.c?v=0.98">0.98</a>] [<a href="source/kernel/exit.c?v=0.97">0.97</a>] [<a href="source/kernel/exit.c?v=0.96a">0.96a</a>] [<a href="source/kernel/exit.c?v=0.95">0.95</a>] [<a href="source/kernel/exit.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/exit.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/exit.c#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/kernel/exit.c#L2">2</a> <b><i> * linux/kernel/exit.c</i></b> <a name=L3 href="source/kernel/exit.c#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/kernel/exit.c#L4">4</a> <b><i> * (C) 1991 Linus Torvalds</i></b> <a name=L5 href="source/kernel/exit.c#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/kernel/exit.c#L6">6</a> <a name=L7 href="source/kernel/exit.c#L7">7</a> #include <errno.h> <a name=L8 href="source/kernel/exit.c#L8">8</a> #include <signal.h> <a name=L9 href="source/kernel/exit.c#L9">9</a> #include <sys/wait.h> <a name=L10 href="source/kernel/exit.c#L10">10</a> <a name=L11 href="source/kernel/exit.c#L11">11</a> #include <linux/sched.h> <a name=L12 href="source/kernel/exit.c#L12">12</a> #include <linux/kernel.h> <a name=L13 href="source/kernel/exit.c#L13">13</a> #include <linux/tty.h> <a name=L14 href="source/kernel/exit.c#L14">14</a> #include <asm/segment.h> <a name=L15 href="source/kernel/exit.c#L15">15</a> <a name=L16 href="source/kernel/exit.c#L16">16</a> int <a href="ident?i=sys_pause">sys_pause</a>(void); <a name=L17 href="source/kernel/exit.c#L17">17</a> int <a href="ident?i=sys_close">sys_close</a>(int fd); <a name=L18 href="source/kernel/exit.c#L18">18</a> <a name=L19 href="source/kernel/exit.c#L19">19</a> void <a href="ident?i=release">release</a>(struct <a href="ident?i=task_struct">task_struct</a> * p) <a name=L20 href="source/kernel/exit.c#L20">20</a> { <a name=L21 href="source/kernel/exit.c#L21">21</a> int i; <a name=L22 href="source/kernel/exit.c#L22">22</a> <a name=L23 href="source/kernel/exit.c#L23">23</a> if (!p) <a name=L24 href="source/kernel/exit.c#L24">24</a> return; <a name=L25 href="source/kernel/exit.c#L25">25</a> for (i=1 ; i<<a href="ident?i=NR_TASKS">NR_TASKS</a> ; i++) <a name=L26 href="source/kernel/exit.c#L26">26</a> if (<a href="ident?i=task">task</a>[i]==p) { <a name=L27 href="source/kernel/exit.c#L27">27</a> <a href="ident?i=task">task</a>[i]=<a href="ident?i=NULL">NULL</a>; <a name=L28 href="source/kernel/exit.c#L28">28</a> <a href="ident?i=free_page">free_page</a>((long)p); <a name=L29 href="source/kernel/exit.c#L29">29</a> <a href="ident?i=schedule">schedule</a>(); <a name=L30 href="source/kernel/exit.c#L30">30</a> return; <a name=L31 href="source/kernel/exit.c#L31">31</a> } <a name=L32 href="source/kernel/exit.c#L32">32</a> <a href="ident?i=panic">panic</a>(<i>"trying to release non-existent task"</i>); <a name=L33 href="source/kernel/exit.c#L33">33</a> } <a name=L34 href="source/kernel/exit.c#L34">34</a> <a name=L35 href="source/kernel/exit.c#L35">35</a> static inline int <a href="ident?i=send_sig">send_sig</a>(long sig,struct <a href="ident?i=task_struct">task_struct</a> * p,int priv) <a name=L36 href="source/kernel/exit.c#L36">36</a> { <a name=L37 href="source/kernel/exit.c#L37">37</a> if (!p || sig<1 || sig>32) <a name=L38 href="source/kernel/exit.c#L38">38</a> return -<a href="ident?i=EINVAL">EINVAL</a>; <a name=L39 href="source/kernel/exit.c#L39">39</a> if (priv || (<a href="ident?i=current">current</a>->euid==p->euid) || <a href="ident?i=suser">suser</a>()) <a name=L40 href="source/kernel/exit.c#L40">40</a> p->signal |= (1<<(sig-1)); <a name=L41 href="source/kernel/exit.c#L41">41</a> else <a name=L42 href="source/kernel/exit.c#L42">42</a> return -<a href="ident?i=EPERM">EPERM</a>; <a name=L43 href="source/kernel/exit.c#L43">43</a> return 0; <a name=L44 href="source/kernel/exit.c#L44">44</a> } <a name=L45 href="source/kernel/exit.c#L45">45</a> <a name=L46 href="source/kernel/exit.c#L46">46</a> static void <a href="ident?i=kill_session">kill_session</a>(void) <a name=L47 href="source/kernel/exit.c#L47">47</a> { <a name=L48 href="source/kernel/exit.c#L48">48</a> struct <a href="ident?i=task_struct">task_struct</a> **p = <a href="ident?i=NR_TASKS">NR_TASKS</a> + <a href="ident?i=task">task</a>; <a name=L49 href="source/kernel/exit.c#L49">49</a> <a name=L50 href="source/kernel/exit.c#L50">50</a> while (--p > &<a href="ident?i=FIRST_TASK">FIRST_TASK</a>) { <a name=L51 href="source/kernel/exit.c#L51">51</a> if (*p && (*p)->session == <a href="ident?i=current">current</a>->session) <a name=L52 href="source/kernel/exit.c#L52">52</a> (*p)->signal |= 1<<(<a href="ident?i=SIGHUP">SIGHUP</a>-1); <a name=L53 href="source/kernel/exit.c#L53">53</a> } <a name=L54 href="source/kernel/exit.c#L54">54</a> } <a name=L55 href="source/kernel/exit.c#L55">55</a> <a name=L56 href="source/kernel/exit.c#L56">56</a> <b><i>/*</i></b> <a name=L57 href="source/kernel/exit.c#L57">57</a> <b><i> * XXX need to check permissions needed to send signals to process</i></b> <a name=L58 href="source/kernel/exit.c#L58">58</a> <b><i> * groups, etc. etc. kill() permissions semantics are tricky!</i></b> <a name=L59 href="source/kernel/exit.c#L59">59</a> <b><i> */</i></b> <a name=L60 href="source/kernel/exit.c#L60">60</a> int <a href="ident?i=sys_kill">sys_kill</a>(int pid,int sig) <a name=L61 href="source/kernel/exit.c#L61">61</a> { <a name=L62 href="source/kernel/exit.c#L62">62</a> struct <a href="ident?i=task_struct">task_struct</a> **p = <a href="ident?i=NR_TASKS">NR_TASKS</a> + <a href="ident?i=task">task</a>; <a name=L63 href="source/kernel/exit.c#L63">63</a> int err, retval = 0; <a name=L64 href="source/kernel/exit.c#L64">64</a> <a name=L65 href="source/kernel/exit.c#L65">65</a> if (!pid) while (--p > &<a href="ident?i=FIRST_TASK">FIRST_TASK</a>) { <a name=L66 href="source/kernel/exit.c#L66">66</a> if (*p && (*p)->pgrp == <a href="ident?i=current">current</a>->pid) <a name=L67 href="source/kernel/exit.c#L67">67</a> if (err=<a href="ident?i=send_sig">send_sig</a>(sig,*p,1)) <a name=L68 href="source/kernel/exit.c#L68">68</a> retval = err; <a name=L69 href="source/kernel/exit.c#L69">69</a> } else if (pid>0) while (--p > &<a href="ident?i=FIRST_TASK">FIRST_TASK</a>) { <a name=L70 href="source/kernel/exit.c#L70">70</a> if (*p && (*p)->pid == pid) <a name=L71 href="source/kernel/exit.c#L71">71</a> if (err=<a href="ident?i=send_sig">send_sig</a>(sig,*p,0)) <a name=L72 href="source/kernel/exit.c#L72">72</a> retval = err; <a name=L73 href="source/kernel/exit.c#L73">73</a> } else if (pid == -1) while (--p > &<a href="ident?i=FIRST_TASK">FIRST_TASK</a>) <a name=L74 href="source/kernel/exit.c#L74">74</a> if (err = <a href="ident?i=send_sig">send_sig</a>(sig,*p,0)) <a name=L75 href="source/kernel/exit.c#L75">75</a> retval = err; <a name=L76 href="source/kernel/exit.c#L76">76</a> else while (--p > &<a href="ident?i=FIRST_TASK">FIRST_TASK</a>) <a name=L77 href="source/kernel/exit.c#L77">77</a> if (*p && (*p)->pgrp == -pid) <a name=L78 href="source/kernel/exit.c#L78">78</a> if (err = <a href="ident?i=send_sig">send_sig</a>(sig,*p,0)) <a name=L79 href="source/kernel/exit.c#L79">79</a> retval = err; <a name=L80 href="source/kernel/exit.c#L80">80</a> return retval; <a name=L81 href="source/kernel/exit.c#L81">81</a> } <a name=L82 href="source/kernel/exit.c#L82">82</a> <a name=L83 href="source/kernel/exit.c#L83">83</a> static void <a href="ident?i=tell_father">tell_father</a>(int pid) <a name=L84 href="source/kernel/exit.c#L84">84</a> { <a name=L85 href="source/kernel/exit.c#L85">85</a> int i; <a name=L86 href="source/kernel/exit.c#L86">86</a> <a name=L87 href="source/kernel/exit.c#L87">87</a> if (pid) <a name=L88 href="source/kernel/exit.c#L88">88</a> for (i=0;i<<a href="ident?i=NR_TASKS">NR_TASKS</a>;i++) { <a name=L89 href="source/kernel/exit.c#L89">89</a> if (!<a href="ident?i=task">task</a>[i])⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -