| 1 | ---
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| 2 | title: OSH Table of Contents
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| 3 | all_docs_url: ..
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| 4 | css_files: ../../web/base.css ../../web/manual.css ../../web/ref-index.css
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| 5 | preserve_anchor_case: yes
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| 6 | ---
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| 7 |
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| 8 | <div class="doc-ref-header">
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| 9 |
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| 10 | [Oils Reference](index.html) —
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| 11 | **OSH Table of Contents** | [YSH](toc-ysh.html) | [Data Notation](toc-data.html)
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| 12 |
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| 13 | </div>
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| 14 |
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| 15 | [OSH]($xref) is a POSIX- and [bash]($xref)-compatible shell.
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| 16 |
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| 17 | <!--
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| 18 | <div class="custom-toc">
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| 19 |
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| 20 | [OSH Types](#type-method) <br/>
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| 21 | [Builtin Commands](#builtin-cmd) <br/>
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| 22 | [Front End](#front-end) <br/>
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| 23 | [Command Language](#cmd-lang) <br/>
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| 24 | [OSH Assignment](#osh-assign) <br/>
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| 25 | [Word Language](#word-lang) <br/>
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| 26 | [Mini Languages](#mini-lang) <br/>
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| 27 | [Shell Options](#option) <br/>
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| 28 | [Special Variables](#special-var) <br/>
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| 29 | [Plugins and Hooks](#plugin) <br/>
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| 30 |
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| 31 | [type-method](#type-method)
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| 32 | [builtin-cmd](#builtin-cmd)
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| 33 | [front-end](#front-end)
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| 34 | [cmd-lang](#cmd-lang)
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| 35 | [osh-assign](#osh-assign)
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| 36 | [word-lang](#word-lang)
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| 37 | [mini-lang](#mini-lang)
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| 38 | [option](#option)
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| 39 | [special-var](#special-var)
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| 40 | [plugin](#plugin)
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| 41 |
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| 42 | </div>
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| 43 | -->
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| 44 |
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| 45 | <h2 id="type-method">
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| 46 | OSH Types <a class="group-link" href="chap-type-method.html">type-method</a>
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| 47 | </h2>
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| 48 |
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| 49 | ```chapter-links-type-method
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| 50 | [OSH] BashArray BashAssoc
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| 51 | ```
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| 52 |
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| 53 | <h2 id="builtin-cmd">
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| 54 | Builtin Commands <a class="group-link" href="chap-builtin-cmd.html">builtin-cmd</a>
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| 55 | </h2>
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| 56 |
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| 57 | ```chapter-links-builtin-cmd
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| 58 | [I/O] read echo printf
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| 59 | readarray mapfile
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| 60 | [Run Code] source . eval trap
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| 61 | [Set Options] set shopt
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| 62 | [Working Dir] cd pwd pushd popd dirs
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| 63 | [Completion] complete compgen compopt compadjust compexport
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| 64 | [Shell Process] exec X logout
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| 65 | umask ulimit times
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| 66 | [Child Process] jobs wait
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| 67 | fg X bg X kill X disown
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| 68 | [External] test [ getopts
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| 69 | [Introspection] help hash cmd/type X caller
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| 70 | [Word Lookup] command builtin
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| 71 | [Interactive] alias unalias history X fc X bind
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| 72 | X [Unsupported] enable
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| 73 | ```
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| 74 |
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| 75 | <h2 id="stdlib">
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| 76 | Standard Library <a class="group-link" href="chap-stdlib.html">stdlib</a>
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| 77 | </h2>
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| 78 |
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| 79 | ```chapter-links-stdlib
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| 80 | [two] log die
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| 81 | [byo-server-lib] byo-maybe-run byo-must-run
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| 82 | ```
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| 83 | <!--
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| 84 | [bash-strict.sh]
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| 85 | [taskfile.sh]
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| 86 | -->
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| 87 |
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| 88 | <h2 id="front-end">
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| 89 | Front End <a class="group-link" href="chap-front-end.html">front-end</a>
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| 90 | </h2>
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| 91 |
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| 92 | ```chapter-links-front-end
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| 93 | [Usage] oils-usage osh-usage config
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| 94 | startup line-editing exit-codes
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| 95 | [Lexing] comment # line-continuation \ ascii-whitespace [ \t\r\n]
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| 96 | ```
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| 97 |
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| 98 | <h2 id="cmd-lang">
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| 99 | Command Language <a class="group-link" href="chap-cmd-lang.html">cmd-lang</a>
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| 100 | </h2>
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| 101 |
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| 102 | ```chapter-links-cmd-lang
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| 103 | [Commands] simple-command semicolon ;
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| 104 | [Conditional] case if dbracket [[
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| 105 | true false colon :
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| 106 | bang ! and && or ||
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| 107 | [Iteration] while until for for-expr-sh ((
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| 108 | [Control Flow] break continue return exit
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| 109 | [Grouping] sh-func sh-block { subshell (
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| 110 | [Concurrency] pipe | X pipe-amp |& ampersand &
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| 111 | [Redirects] redir-file > >> >| < <> not impl: &>
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| 112 | redir-desc >& <&
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| 113 | here-doc << <<- <<<
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| 114 | [Other Command] dparen (( time X coproc X select
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| 115 | ```
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| 116 |
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| 117 | <h2 id="osh-assign">
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| 118 | Assignments and Expressions <a class="group-link" href="chap-osh-assign.html">osh-assign</a>
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| 119 | </h2>
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| 120 |
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| 121 | ```chapter-links-osh-assign
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| 122 | [Literals] sh-array array=(a b c) array[1]=B "${a[@]}"
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| 123 | sh-assoc assoc=(['a']=1 ['b']=2) assoc['x']=b
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| 124 | [Operators] sh-assign str='xyz'
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| 125 | sh-append str+='abc'
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| 126 | [Builtins] local readonly export unset shift
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| 127 | declare typeset X let
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| 128 | ```
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| 129 |
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| 130 | <h2 id="word-lang">
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| 131 | Word Language <a class="group-link" href="chap-word-lang.html">word-lang</a>
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| 132 | </h2>
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| 133 |
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| 134 | <!-- linkify_stop_col is 33 -->
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| 135 |
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| 136 | ```chapter-links-word-lang_33
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| 137 | [Quotes] osh-string 'abc' $'line\n' "$var"
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| 138 | [Substitutions] command-sub $(command) `command`
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| 139 | var-sub ${var} $0 $9
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| 140 | arith-sub $((1 + 2))
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| 141 | tilde-sub ~/src
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| 142 | proc-sub diff <(sort L.txt) <(sort R.txt)
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| 143 | [Var Ops] op-test ${x:-default}
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| 144 | op-strip ${x%%suffix} etc.
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| 145 | op-replace ${x//y/z}
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| 146 | op-index ${a[i+1}
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| 147 | op-slice ${a[@]:0:1}
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| 148 | op-format ${x@P}
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| 149 | ```
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| 150 |
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| 151 | <h2 id="mini-lang">
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| 152 | Other Mini Languages <a class="group-link" href="chap-mini-lang.html">mini-lang</a>
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| 153 | </h2>
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| 154 |
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| 155 | <!-- linkify_stop_col is 33 -->
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| 156 |
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| 157 | ```chapter-links-mini-lang_33
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| 158 | [Arithmetic] arith-context Where legacy arithmetic is allowed
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| 159 | sh-numbers 0xFF 0755 etc.
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| 160 | sh-arith 1 + 2*3 a *= 2
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| 161 | sh-logical !a && b
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| 162 | sh-bitwise ~a ^ b
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| 163 | [Boolean] bool-expr [[ ! $x && $y || $z ]]
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| 164 | test ! $x -a $y -o $z
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| 165 | bool-infix $a -nt $b $x == $y
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| 166 | bool-path -d /etc
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| 167 | bool-str -n foo -z ''
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| 168 | bool-other -o errexit -v name[index]
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| 169 | [Patterns] glob-pat *.py
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| 170 | extglob ,(*.py|*.sh)
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| 171 | regex [[ foo =~ [a-z]+ ]]
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| 172 | [Other Sublang] braces {alice,bob}@example.com
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| 173 | histsub !$ !! !n
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| 174 | char-escapes \t \c \x00 \u03bc
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| 175 | ```
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| 176 |
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| 177 | <h2 id="option">
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| 178 | Global Shell Options <a class="group-link" href="chap-option.html">option</a>
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| 179 | </h2>
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| 180 |
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| 181 | <!-- linkify_stop_col is 20 since we only want section links -->
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| 182 |
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| 183 | ```chapter-links-option_22
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| 184 | [Errors] nounset -u errexit -e inherit_errexit pipefail
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| 185 | [Globbing] noglob -f nullglob failglob X dotglob
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| 186 | dashglob (true)
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| 187 | [Debugging] xtrace X verbose X extdebug
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| 188 | [Interactive] emacs vi
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| 189 | [Other POSIX] X noclobber
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| 190 | [Compat] eval_unsafe_arith ignore_flags_not_impl
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| 191 | ```
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| 192 |
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| 193 | <h2 id="special-var">
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| 194 | Special Variables <a class="group-link" href="chap-special-var.html">special-var</a>
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| 195 | </h2>
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| 196 |
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| 197 | ```chapter-links-special-var
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| 198 | [POSIX Special] $@ $* $# $? $- $$ $! $0 $9
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| 199 | [Shell Vars] IFS X LANG X GLOBIGNORE
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| 200 | [Shell Options] SHELLOPTS X BASHOPTS
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| 201 | [Other Env] HOME PATH
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| 202 | [Other Special] BASH_REMATCH @PIPESTATUS
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| 203 | [Platform] HOSTNAME OSTYPE
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| 204 | [Call Stack] @BASH_SOURCE @FUNCNAME @BASH_LINENO
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| 205 | X @BASH_ARGV X @BASH_ARGC
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| 206 | [Tracing] LINENO
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| 207 | [Process State] UID EUID PPID X BASHPID
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| 208 | X [Process Stack] BASH_SUBSHELL SHLVL
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| 209 | X [Shell State] BASH_CMDS @DIRSTACK
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| 210 | [Completion] @COMP_WORDS COMP_CWORD COMP_LINE COMP_POINT
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| 211 | COMP_WORDBREAKS @COMPREPLY X COMP_KEY
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| 212 | X COMP_TYPE COMP_ARGV
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| 213 | [History] HISTFILE
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| 214 | [cd] PWD OLDPWD X CDPATH
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| 215 | [getopts] OPTIND OPTARG X OPTERR
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| 216 | [read] REPLY
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| 217 | [Functions] X RANDOM SECONDS
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| 218 | ```
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| 219 |
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| 220 | <h2 id="plugin">
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| 221 | Plugins and Hooks <a class="group-link" href="chap-plugin.html">plugin</a>
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| 222 | </h2>
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| 223 |
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| 224 | ```chapter-links-plugin
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| 225 | [Signals] SIGTERM SIGINT SIGQUIT
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| 226 | SIGTTIN SIGTTOU SIGWINCH
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| 227 | [Traps] DEBUG ERR EXIT X RETURN
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| 228 | [Words] PS1 X PS2 X PS3 PS4
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| 229 | [Completion] complete
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| 230 | [Other Plugin] PROMPT_COMMAND X command_not_found
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| 231 | ```
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