📄 truncate.c
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/fs/truncate.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/fs/truncate.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/fs/">fs</a>/<a href="source/fs/truncate.c">truncate.c</a></h1><div align=center> <b>版本:</b> [<a href="source/fs/truncate.c?v=1.0">1.0</a>] [<a href="source/fs/truncate.c?v=0.99.11">0.99.11</a>] [<a href="source/fs/truncate.c?v=0.99">0.99</a>] [<a href="source/fs/truncate.c?v=0.97">0.97</a>] [<a href="source/fs/truncate.c?v=0.96a">0.96a</a>] [<a href="source/fs/truncate.c?v=0.95">0.95</a>] [<a href="source/fs/truncate.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/fs/truncate.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/fs/truncate.c#L1">1</a> <b><i>/*</i></b> <a name=L2 href="source/fs/truncate.c#L2">2</a> <b><i> * linux/fs/truncate.c</i></b> <a name=L3 href="source/fs/truncate.c#L3">3</a> <b><i> *</i></b> <a name=L4 href="source/fs/truncate.c#L4">4</a> <b><i> * (C) 1991 Linus Torvalds</i></b> <a name=L5 href="source/fs/truncate.c#L5">5</a> <b><i> */</i></b> <a name=L6 href="source/fs/truncate.c#L6">6</a> <a name=L7 href="source/fs/truncate.c#L7">7</a> #include <linux/sched.h> <a name=L8 href="source/fs/truncate.c#L8">8</a> <a name=L9 href="source/fs/truncate.c#L9">9</a> #include <sys/stat.h> <a name=L10 href="source/fs/truncate.c#L10">10</a> <a name=L11 href="source/fs/truncate.c#L11">11</a> static void <a href="ident?i=free_ind">free_ind</a>(int dev,int block) <a name=L12 href="source/fs/truncate.c#L12">12</a> { <a name=L13 href="source/fs/truncate.c#L13">13</a> struct <a href="ident?i=buffer_head">buffer_head</a> * bh; <a name=L14 href="source/fs/truncate.c#L14">14</a> unsigned short * p; <a name=L15 href="source/fs/truncate.c#L15">15</a> int i; <a name=L16 href="source/fs/truncate.c#L16">16</a> <a name=L17 href="source/fs/truncate.c#L17">17</a> if (!block) <a name=L18 href="source/fs/truncate.c#L18">18</a> return; <a name=L19 href="source/fs/truncate.c#L19">19</a> if (bh=<a href="ident?i=bread">bread</a>(dev,block)) { <a name=L20 href="source/fs/truncate.c#L20">20</a> p = (unsigned short *) bh->b_data; <a name=L21 href="source/fs/truncate.c#L21">21</a> for (i=0;i<512;i++,p++) <a name=L22 href="source/fs/truncate.c#L22">22</a> if (*p) <a name=L23 href="source/fs/truncate.c#L23">23</a> <a href="ident?i=free_block">free_block</a>(dev,*p); <a name=L24 href="source/fs/truncate.c#L24">24</a> <a href="ident?i=brelse">brelse</a>(bh); <a name=L25 href="source/fs/truncate.c#L25">25</a> } <a name=L26 href="source/fs/truncate.c#L26">26</a> <a href="ident?i=free_block">free_block</a>(dev,block); <a name=L27 href="source/fs/truncate.c#L27">27</a> } <a name=L28 href="source/fs/truncate.c#L28">28</a> <a name=L29 href="source/fs/truncate.c#L29">29</a> static void <a href="ident?i=free_dind">free_dind</a>(int dev,int block) <a name=L30 href="source/fs/truncate.c#L30">30</a> { <a name=L31 href="source/fs/truncate.c#L31">31</a> struct <a href="ident?i=buffer_head">buffer_head</a> * bh; <a name=L32 href="source/fs/truncate.c#L32">32</a> unsigned short * p; <a name=L33 href="source/fs/truncate.c#L33">33</a> int i; <a name=L34 href="source/fs/truncate.c#L34">34</a> <a name=L35 href="source/fs/truncate.c#L35">35</a> if (!block) <a name=L36 href="source/fs/truncate.c#L36">36</a> return; <a name=L37 href="source/fs/truncate.c#L37">37</a> if (bh=<a href="ident?i=bread">bread</a>(dev,block)) { <a name=L38 href="source/fs/truncate.c#L38">38</a> p = (unsigned short *) bh->b_data; <a name=L39 href="source/fs/truncate.c#L39">39</a> for (i=0;i<512;i++,p++) <a name=L40 href="source/fs/truncate.c#L40">40</a> if (*p) <a name=L41 href="source/fs/truncate.c#L41">41</a> <a href="ident?i=free_ind">free_ind</a>(dev,*p); <a name=L42 href="source/fs/truncate.c#L42">42</a> <a href="ident?i=brelse">brelse</a>(bh); <a name=L43 href="source/fs/truncate.c#L43">43</a> } <a name=L44 href="source/fs/truncate.c#L44">44</a> <a href="ident?i=free_block">free_block</a>(dev,block); <a name=L45 href="source/fs/truncate.c#L45">45</a> } <a name=L46 href="source/fs/truncate.c#L46">46</a> <a name=L47 href="source/fs/truncate.c#L47">47</a> void <a href="ident?i=truncate">truncate</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode) <a name=L48 href="source/fs/truncate.c#L48">48</a> { <a name=L49 href="source/fs/truncate.c#L49">49</a> int i; <a name=L50 href="source/fs/truncate.c#L50">50</a> <a name=L51 href="source/fs/truncate.c#L51">51</a> if (!(<a href="ident?i=S_ISREG">S_ISREG</a>(inode->i_mode) || <a href="ident?i=S_ISDIR">S_ISDIR</a>(inode->i_mode))) <a name=L52 href="source/fs/truncate.c#L52">52</a> return; <a name=L53 href="source/fs/truncate.c#L53">53</a> for (i=0;i<7;i++) <a name=L54 href="source/fs/truncate.c#L54">54</a> if (inode->i_zone[i]) { <a name=L55 href="source/fs/truncate.c#L55">55</a> <a href="ident?i=free_block">free_block</a>(inode->i_dev,inode->i_zone[i]); <a name=L56 href="source/fs/truncate.c#L56">56</a> inode->i_zone[i]=0; <a name=L57 href="source/fs/truncate.c#L57">57</a> } <a name=L58 href="source/fs/truncate.c#L58">58</a> <a href="ident?i=free_ind">free_ind</a>(inode->i_dev,inode->i_zone[7]); <a name=L59 href="source/fs/truncate.c#L59">59</a> <a href="ident?i=free_dind">free_dind</a>(inode->i_dev,inode->i_zone[8]); <a name=L60 href="source/fs/truncate.c#L60">60</a> inode->i_zone[7] = inode->i_zone[8] = 0; <a name=L61 href="source/fs/truncate.c#L61">61</a> inode->i_size = 0; <a name=L62 href="source/fs/truncate.c#L62">62</a> inode->i_dirt = 1; <a name=L63 href="source/fs/truncate.c#L63">63</a> inode->i_mtime = inode->i_ctime = <a href="ident?i=CURRENT_TIME">CURRENT_TIME</a>; <a name=L64 href="source/fs/truncate.c#L64">64</a> } <a name=L65 href="source/fs/truncate.c#L65">65</a> <a name=L66 href="source/fs/truncate.c#L66">66</a> </pre><hr><div align=center> [<b><i>源代码浏览</i></b>] [<a href="diff/fs/truncate.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><hr>本网页由 <a href="http:blurb.html">LXR引擎</a> 自动生成.<br></html>⌨️ 快捷键说明
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