diff options
| author | johannst <johannst@users.noreply.github.com> | 2020-09-16 22:23:09 +0000 |
|---|---|---|
| committer | johannst <johannst@users.noreply.github.com> | 2020-09-16 22:23:09 +0000 |
| commit | 449b66753370d6b64bc9aa7e5c0592ba0fe6f680 (patch) | |
| tree | b245d2a3825031336b4a5779f1ab9fc54ce88f2b /misc/bash.html | |
| parent | 78ecd047f07df42673eb63436fe4508d1c3b22cd (diff) | |
| download | notes-449b66753370d6b64bc9aa7e5c0592ba0fe6f680.tar.gz notes-449b66753370d6b64bc9aa7e5c0592ba0fe6f680.zip | |
deploy: 2e329ad934ef010fd94afe965f14ab895dcb515e
Diffstat (limited to 'misc/bash.html')
| -rw-r--r-- | misc/bash.html | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/misc/bash.html b/misc/bash.html deleted file mode 100644 index 6845b68..0000000 --- a/misc/bash.html +++ /dev/null @@ -1,360 +0,0 @@ -<!DOCTYPE HTML> -<html lang="en" class="sidebar-visible no-js light"> - <head> - <!-- Book generated using mdBook --> - <meta charset="UTF-8"> - <title>bash - Notes</title> - - - <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> - <meta name="description" content=""> - <meta name="viewport" content="width=device-width, initial-scale=1"> - <meta name="theme-color" content="#ffffff" /> - - <link rel="shortcut icon" href="../favicon.png"> - <link rel="stylesheet" href="../css/variables.css"> - <link rel="stylesheet" href="../css/general.css"> - <link rel="stylesheet" href="../css/chrome.css"> - <link rel="stylesheet" href="../css/print.css" media="print"> - - <!-- Fonts --> - <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css"> - <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css"> - <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css"> - - <!-- Highlight.js Stylesheets --> - <link rel="stylesheet" href="../highlight.css"> - <link rel="stylesheet" href="../tomorrow-night.css"> - <link rel="stylesheet" href="../ayu-highlight.css"> - - <!-- Custom theme stylesheets --> - - - - </head> - <body> - <!-- Provide site root to javascript --> - <script type="text/javascript"> - var path_to_root = "../"; - var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "light" : "light"; - </script> - - <!-- Work around some values being stored in localStorage wrapped in quotes --> - <script type="text/javascript"> - try { - var theme = localStorage.getItem('mdbook-theme'); - var sidebar = localStorage.getItem('mdbook-sidebar'); - - if (theme.startsWith('"') && theme.endsWith('"')) { - localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1)); - } - - if (sidebar.startsWith('"') && sidebar.endsWith('"')) { - localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1)); - } - } catch (e) { } - </script> - - <!-- Set the theme before any content is loaded, prevents flash --> - <script type="text/javascript"> - var theme; - try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { } - if (theme === null || theme === undefined) { theme = default_theme; } - var html = document.querySelector('html'); - html.classList.remove('no-js') - html.classList.remove('light') - html.classList.add(theme); - html.classList.add('js'); - </script> - - <!-- Hide / unhide sidebar before it is displayed --> - <script type="text/javascript"> - var html = document.querySelector('html'); - var sidebar = 'hidden'; - if (document.body.clientWidth >= 1080) { - try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { } - sidebar = sidebar || 'visible'; - } - html.classList.remove('sidebar-visible'); - html.classList.add("sidebar-" + sidebar); - </script> - - <nav id="sidebar" class="sidebar" aria-label="Table of contents"> - <div id="sidebar-scrollbox" class="sidebar-scrollbox"> - <ol class="chapter"><li class="expanded "><a href="../misc/index.html"><strong aria-hidden="true">1.</strong> Misc</a></li><li><ol class="section"><li class="expanded "><a href="../misc/zsh.html"><strong aria-hidden="true">1.1.</strong> zsh</a></li><li class="expanded "><a href="../misc/bash.html" class="active"><strong aria-hidden="true">1.2.</strong> bash</a></li><li class="expanded "><a href="../misc/fish.html"><strong aria-hidden="true">1.3.</strong> fish</a></li><li class="expanded "><a href="../misc/tmux.html"><strong aria-hidden="true">1.4.</strong> tmux</a></li><li class="expanded "><a href="../misc/git.html"><strong aria-hidden="true">1.5.</strong> git</a></li><li class="expanded "><a href="../misc/awk.html"><strong aria-hidden="true">1.6.</strong> awk</a></li><li class="expanded "><a href="../misc/emacs.html"><strong aria-hidden="true">1.7.</strong> emacs</a></li><li class="expanded "><a href="../misc/gdb.html"><strong aria-hidden="true">1.8.</strong> gdb</a></li><li class="expanded "><a href="../misc/radare2.html"><strong aria-hidden="true">1.9.</strong> radare2</a></li></ol></li><li class="expanded "><a href="../monitor/index.html"><strong aria-hidden="true">2.</strong> Resource analysis & monitor</a></li><li><ol class="section"><li class="expanded "><a href="../monitor/lsof.html"><strong aria-hidden="true">2.1.</strong> lsof</a></li><li class="expanded "><a href="../monitor/pidstat.html"><strong aria-hidden="true">2.2.</strong> pidstat</a></li><li class="expanded "><a href="../monitor/pgrep.html"><strong aria-hidden="true">2.3.</strong> pgrep</a></li><li class="expanded "><a href="../monitor/pmap.html"><strong aria-hidden="true">2.4.</strong> pmap</a></li><li class="expanded "><a href="../monitor/pstack.html"><strong aria-hidden="true">2.5.</strong> pstack</a></li></ol></li><li class="expanded "><a href="../trace_profile/index.html"><strong aria-hidden="true">3.</strong> Trace and Profile</a></li><li><ol class="section"><li class="expanded "><a href="../trace_profile/strace.html"><strong aria-hidden="true">3.1.</strong> strace</a></li><li class="expanded "><a href="../trace_profile/ltrace.html"><strong aria-hidden="true">3.2.</strong> ltrace</a></li><li class="expanded "><a href="../trace_profile/perf.html"><strong aria-hidden="true">3.3.</strong> perf</a></li><li class="expanded "><a href="../trace_profile/oprofile.html"><strong aria-hidden="true">3.4.</strong> OProfile</a></li><li class="expanded "><a href="../trace_profile/time.html"><strong aria-hidden="true">3.5.</strong> time</a></li></ol></li><li class="expanded "><a href="../binary/index.html"><strong aria-hidden="true">4.</strong> Binary</a></li><li><ol class="section"><li class="expanded "><a href="../binary/od.html"><strong aria-hidden="true">4.1.</strong> od</a></li><li class="expanded "><a href="../binary/xxd.html"><strong aria-hidden="true">4.2.</strong> xxd</a></li><li class="expanded "><a href="../binary/readelf.html"><strong aria-hidden="true">4.3.</strong> readelf</a></li><li class="expanded "><a href="../binary/objdump.html"><strong aria-hidden="true">4.4.</strong> objdump</a></li><li class="expanded "><a href="../binary/nm.html"><strong aria-hidden="true">4.5.</strong> nm</a></li></ol></li><li class="expanded "><a href="../development/index.html"><strong aria-hidden="true">5.</strong> Development</a></li><li><ol class="section"><li class="expanded "><a href="../development/c++filt.html"><strong aria-hidden="true">5.1.</strong> c++filt</a></li><li class="expanded "><a href="../development/c++.html"><strong aria-hidden="true">5.2.</strong> c++</a></li><li class="expanded "><a href="../development/glibc.html"><strong aria-hidden="true">5.3.</strong> glibc</a></li><li class="expanded "><a href="../development/gcc.html"><strong aria-hidden="true">5.4.</strong> gcc</a></li><li class="expanded "><a href="../development/ld.so.html"><strong aria-hidden="true">5.5.</strong> ld.so</a></li></ol></li></ol> - </div> - <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> - </nav> - - <div id="page-wrapper" class="page-wrapper"> - - <div class="page"> - - <div id="menu-bar" class="menu-bar"> - <div id="menu-bar-sticky-container"> - <div class="left-buttons"> - <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar"> - <i class="fa fa-bars"></i> - </button> - <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list"> - <i class="fa fa-paint-brush"></i> - </button> - <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu"> - <li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li> - <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li> - <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li> - <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li> - <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li> - </ul> - - <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> - <i class="fa fa-search"></i> - </button> - - </div> - - <h1 class="menu-title">Notes</h1> - - <div class="right-buttons"> - <a href="../print.html" title="Print this book" aria-label="Print this book"> - <i id="print-button" class="fa fa-print"></i> - </a> - - </div> - </div> - </div> - - - <div id="search-wrapper" class="hidden"> - <form id="searchbar-outer" class="searchbar-outer"> - <input type="search" name="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> - </form> - <div id="searchresults-outer" class="searchresults-outer hidden"> - <div id="searchresults-header" class="searchresults-header"></div> - <ul id="searchresults"> - </ul> - </div> - </div> - - - <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> - <script type="text/javascript"> - document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); - document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); - Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { - link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); - }); - </script> - - <div id="content" class="content"> - <main> - <h1><a class="header" href="#bash1" id="bash1">bash(1)</a></h1> -<h2><a class="header" href="#expansion" id="expansion">Expansion</a></h2> -<h3><a class="header" href="#generator" id="generator">Generator</a></h3> -<pre><code class="language-bash"># generate sequence from n to m -{n..m} -# generate sequence from n to m step by s -{n..m..s} - -# expand cartesian product -{a,b}{c,d} -</code></pre> -<h3><a class="header" href="#parameter" id="parameter">Parameter</a></h3> -<pre><code class="language-bash"># default param -bar=${foo:-some_val} # if $foo set, then bar=$foo else bar=some_val - -# check param set -bar=${foo:?msg} # if $foo set, then bar=$foo else exit and print msg - -# indirect -FOO=foo -BAR=FOO -bar=${!BAR} # deref value of BAR -> bar=$FOO - -# prefix -${foo#prefix} # remove prefix when expanding $foo -# suffix -${foo%suffix} # remove suffix when expanding $foo - -# substitute -${foo/pattern/string} # replace pattern with string when expanding foo -# pattern starts with -# '/' replace all occurences of pattern -# '#' pattern match at beginning -# '%' pattern match at end -</code></pre> -<blockquote> -<p>Note: <code>prefix</code>/<code>suffix</code>/<code>pattern</code> are expanded as <a href="#pathname">pathnames</a>.</p> -</blockquote> -<h3><a class="header" href="#pathname" id="pathname">Pathname</a></h3> -<pre><code class="language-bash">* match any string -? match any single char -\\ match backslash -[abc] match any char of 'a' 'b' 'c' -[a-z] match any char between 'a' - 'z' -[^ab] negate, match all not 'a' 'b' -[:class:] match any char in class, available: - alnum,alpha,ascii,blank,cntrl,digit,graph,lower, - print,punct,space,upper,word,xdigit -</code></pre> -<p>Wit <code>extglob</code> shell option enabled it is possible to have more powerful -patterns. In the following <code>pattern-list</code> is one ore more patterns separated -by <code>|</code> char.</p> -<pre><code class="language-bash">?(pattern-list) matches zero or one occurrence of the given patterns -*(pattern-list) matches zero or more occurrences of the given patterns -+(pattern-list) matches one or more occurrences of the given patterns -@(pattern-list) matches one of the given patterns -!(pattern-list) matches anything except one of the given patterns -</code></pre> -<blockquote> -<p>Note: <code>shopt -s extglob</code>/<code>shopt -u extglob</code> to enable/disable <code>extglob</code> -option.</p> -</blockquote> -<h2><a class="header" href="#io-redirection" id="io-redirection">I/O redirection</a></h2> -<blockquote> -<p>Note: The trick with bash I/O redirection is to interpret from left-to-right.</p> -</blockquote> -<pre><code class="language-bash"># stdout & stderr to file -command >file 2>&1 -# equivalent -command &>file - -# stderr to stdout & stdout to file -command 2>&1 >file -</code></pre> -<h3><a class="header" href="#explanation" id="explanation">Explanation</a></h3> -<pre><code class="language-bash">j>&i -</code></pre> -<p>Duplicate <code>fd i</code> to <code>fd j</code>, making <code>j</code> a copy of <code>i</code>. See <a href="http://man7.org/linux/man-pages/man2/dup.2.html">dup2(2)</a>.</p> -<p>Example:</p> -<pre><code class="language-bash">command 2>&1 >file -</code></pre> -<ol> -<li>duplicate <code>fd 1</code> to <code>fd 2</code>, effectively redirecting <code>stderr</code> to <code>stdout</code></li> -<li>redirect <code>stdout</code> to <code>file</code></li> -</ol> -<h2><a class="header" href="#completion" id="completion">Completion</a></h2> -<p>The <code>complete</code> builtin is used to interact with the completion system.</p> -<pre><code class="language-bash">complete # print currently installed completion handler -complete -F <func> <cmd> # install <func> as completion handler for <cmd> -complete -r <cmd> # uninstall completion handler for <cmd> -</code></pre> -<p>Variables available in completion functions:</p> -<pre><code class="language-bash"># in -$1 # <cmd> -$2 # current word -$3 # privous word - -COMP_WORDS # array with current command line words -COMP_CWORD # index into COMP_WORDS with current cursor position - -# out -COMPREPLY # array with possible completions -</code></pre> -<p>The <code>compgen</code> builtin is used to generate possible matches by comparing <code>word</code> -against words generated by <code>option</code>.</p> -<pre><code class="language-bash">compgen [option] [word] - -# usefule options: -# -W <list> specify list of possible completions -# -d generate list with dirs -# -f generate list with files -# -u generate list with users -# -e generate list with exported variables - -# compare "f" against words "foo" "foobar" "bar" and generate matches -compgen -W "foo foobar bar" "f" - -# compare "hom" against file/dir names and generate matches -compgen -d -f "hom" -</code></pre> -<h3><a class="header" href="#example" id="example">Example</a></h3> -<p>Skeleton to copy/paste for writing simple completions.</p> -<p>Assume a program <code>foo</code> with the following interface:</p> -<pre><code class="language-bash">foo -c green|red|blue -s low|high -f <file> -h -</code></pre> -<p>The completion handler could be implemented as follows:</p> -<pre><code class="language-bash">function _foo() { - local curr=$2 - local prev=$3 - - local opts="-c -s -f -h" - case $prev in - -c) COMPREPLY=( $(compgen -W "green red blue" -- $curr) );; - -s) COMPREPLY=( $(compgen -W "low high" -- $curr) );; - -f) COMPREPLY=( $(compgen -f -- $curr) );; - *) COMPREPLY=( $(compgen -W "$opts" -- $curr) );; - esac -} - -complete -F _foo foo -</code></pre> - - </main> - - <nav class="nav-wrapper" aria-label="Page navigation"> - <!-- Mobile navigation buttons --> - - <a rel="prev" href="../misc/zsh.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - - - <a rel="next" href="../misc/fish.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> - <i class="fa fa-angle-right"></i> - </a> - - - <div style="clear: both"></div> - </nav> - </div> - </div> - - <nav class="nav-wide-wrapper" aria-label="Page navigation"> - - <a href="../misc/zsh.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - - - <a href="../misc/fish.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> - <i class="fa fa-angle-right"></i> - </a> - - </nav> - - </div> - - - - - - - - - <script type="text/javascript"> - window.playpen_copyable = true; - </script> - - - - - - <script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script> - <script src="../mark.min.js" type="text/javascript" charset="utf-8"></script> - <script src="../searcher.js" type="text/javascript" charset="utf-8"></script> - - - <script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script> - <script src="../highlight.js" type="text/javascript" charset="utf-8"></script> - <script src="../book.js" type="text/javascript" charset="utf-8"></script> - - <!-- Custom JS scripts --> - - - - - </body> -</html> |