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bash: going up through system tree

function up() {

# Created at: 2012/06/19 10:37:26
# Go up directory tree X number of directories
# source: http://orangesplotch.com/bash-going-up/
# see explanation at link above, worth!
# I found this here: http://askubuntu.com/questions/110922/climb-up-the-directory-tree-faster
# put this function to your ~/.bashrc
# binding this function to key see below
# http://stackoverflow.com/questions/4200800/in-bash-how-do-i-bind-a-function-key-to-a-command

    COUNTER="[email protected]";
	# default $COUNTER to 1 if it isn't already set
	if [[ -z $COUNTER ]]; then
		COUNTER=1
	fi
	# make sure $COUNTER is a number
	if [ $COUNTER -eq $COUNTER 2> /dev/null ]; then
		nwd=`pwd` # Set new working directory (nwd) to current directory
		# Loop $nwd up directory tree one at a time
		until [[ $COUNTER -lt 1 ]]; do
			nwd=`dirname $nwd`
			let COUNTER-=1
		done
		cd $nwd # change directories to the new working directory
	else
		# print usage and return error
		echo "usage: up [NUMBER]"
		return 1
	fi
}
https://snipt.net/embed/f150db8f2c5803537b6efa9937f3f7b0/
/raw/f150db8f2c5803537b6efa9937f3f7b0/
f150db8f2c5803537b6efa9937f3f7b0
bash
Bash
31
2019-06-20T11:43:21
True
False
False
/api/public/snipt/42589/
goinupsh
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="k">function</span> up<span class="o">()</span> <span class="o">{</span> </span><span id="L-2"><a name="L-2"></a> </span><span id="L-3"><a name="L-3"></a><span class="c1"># Created at: 2012/06/19 10:37:26</span> </span><span id="L-4"><a name="L-4"></a><span class="c1"># Go up directory tree X number of directories</span> </span><span id="L-5"><a name="L-5"></a><span class="c1"># source: http://orangesplotch.com/bash-going-up/</span> </span><span id="L-6"><a name="L-6"></a><span class="c1"># see explanation at link above, worth!</span> </span><span id="L-7"><a name="L-7"></a><span class="c1"># I found this here: http://askubuntu.com/questions/110922/climb-up-the-directory-tree-faster</span> </span><span id="L-8"><a name="L-8"></a><span class="c1"># put this function to your ~/.bashrc</span> </span><span id="L-9"><a name="L-9"></a><span class="c1"># binding this function to key see below</span> </span><span id="L-10"><a name="L-10"></a><span class="c1"># http://stackoverflow.com/questions/4200800/in-bash-how-do-i-bind-a-function-key-to-a-command</span> </span><span id="L-11"><a name="L-11"></a> </span><span id="L-12"><a name="L-12"></a> <span class="nv">COUNTER</span><span class="o">=</span><span class="s2">&quot;</span><span class="nv">[email protected]</span><span class="s2">&quot;</span><span class="p">;</span> </span><span id="L-13"><a name="L-13"></a> <span class="c1"># default $COUNTER to 1 if it isn&#39;t already set</span> </span><span id="L-14"><a name="L-14"></a> <span class="k">if</span> <span class="o">[[</span> -z <span class="nv">$COUNTER</span> <span class="o">]]</span><span class="p">;</span> <span class="k">then</span> </span><span id="L-15"><a name="L-15"></a> <span class="nv">COUNTER</span><span class="o">=</span>1 </span><span id="L-16"><a name="L-16"></a> <span class="k">fi</span> </span><span id="L-17"><a name="L-17"></a> <span class="c1"># make sure $COUNTER is a number</span> </span><span id="L-18"><a name="L-18"></a> <span class="k">if</span> <span class="o">[</span> <span class="nv">$COUNTER</span> -eq <span class="nv">$COUNTER</span> 2&gt; /dev/null <span class="o">]</span><span class="p">;</span> <span class="k">then</span> </span><span id="L-19"><a name="L-19"></a> <span class="nv">nwd</span><span class="o">=</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span> <span class="c1"># Set new working directory (nwd) to current directory</span> </span><span id="L-20"><a name="L-20"></a> <span class="c1"># Loop $nwd up directory tree one at a time</span> </span><span id="L-21"><a name="L-21"></a> <span class="k">until</span> <span class="o">[[</span> <span class="nv">$COUNTER</span> -lt <span class="m">1</span> <span class="o">]]</span><span class="p">;</span> <span class="k">do</span> </span><span id="L-22"><a name="L-22"></a> <span class="nv">nwd</span><span class="o">=</span><span class="sb">`</span>dirname <span class="nv">$nwd</span><span class="sb">`</span> </span><span id="L-23"><a name="L-23"></a> <span class="nb">let</span> COUNTER-<span class="o">=</span>1 </span><span id="L-24"><a name="L-24"></a> <span class="k">done</span> </span><span id="L-25"><a name="L-25"></a> <span class="nb">cd</span> <span class="nv">$nwd</span> <span class="c1"># change directories to the new working directory</span> </span><span id="L-26"><a name="L-26"></a> <span class="k">else</span> </span><span id="L-27"><a name="L-27"></a> <span class="c1"># print usage and return error</span> </span><span id="L-28"><a name="L-28"></a> <span class="nb">echo</span> <span class="s2">&quot;usage: up [NUMBER]&quot;</span> </span><span id="L-29"><a name="L-29"></a> <span class="k">return</span> 1 </span><span id="L-30"><a name="L-30"></a> <span class="k">fi</span> </span><span id="L-31"><a name="L-31"></a><span class="o">}</span> </span></pre></div> </td></tr></table>
bash, bashrc, linux, shell, tools