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diff --git a/gemfeed/2021-11-29-bash-golf-part-1.html b/gemfeed/2021-11-29-bash-golf-part-1.html index 4bccd556..529941d3 100644 --- a/gemfeed/2021-11-29-bash-golf-part-1.html +++ b/gemfeed/2021-11-29-bash-golf-part-1.html @@ -8,10 +8,19 @@ <link rel="stylesheet" href="style-override.css" /> </head> <body> -<h1 style='display: inline'>Bash Golf Part 1</h1><br /> +<p class="header"> +<a href="https://foo.zone">Home</a> | <a href="https://codeberg.org/snonux/foo.zone/src/branch/content-md/gemfeed/2021-11-29-bash-golf-part-1.md">Markdown</a> | <a href="gemini://foo.zone/gemfeed/2021-11-29-bash-golf-part-1.gmi">Gemini</a> +</p> +<h1 style='display: inline' id='bash-golf-part-1'>Bash Golf Part 1</h1><br /> <br /> <span class='quote'>Published at 2021-11-29T14:06:14+00:00; Updated at 2022-01-05</span><br /> <br /> +<span>This is the first blog post about my Bash Golf series. This series is about random Bash tips, tricks and weirdnesses I came across. It's a collection of smaller articles I wrote in an older (in German language) blog, which I translated and refreshed with some new content.</span><br /> +<br /> +<a class='textlink' href='./2021-11-29-bash-golf-part-1.html'>2021-11-29 Bash Golf Part 1 (You are currently reading this)</a><br /> +<a class='textlink' href='./2022-01-01-bash-golf-part-2.html'>2022-01-01 Bash Golf Part 2</a><br /> +<a class='textlink' href='./2023-12-10-bash-golf-part-3.html'>2023-12-10 Bash Golf Part 3</a><br /> +<br /> <pre> '\ . . |>18>> \ . ' . | @@ -23,12 +32,20 @@ jgs^^^^^^^`^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Art by Joan Stark </pre> <br /> -<span>This is the first blog post about my Bash Golf series. This series is about random Bash tips, tricks and weirdnesses I came across. It's a collection of smaller articles I wrote in an older (in German language) blog, which I translated and refreshed with some new content.</span><br /> +<h2 style='display: inline' id='table-of-contents'>Table of Contents</h2><br /> <br /> -<a class='textlink' href='./2021-11-29-bash-golf-part-1.html'>2021-11-29 Bash Golf Part 1 (You are currently reading this)</a><br /> -<a class='textlink' href='./2022-01-01-bash-golf-part-2.html'>2022-01-01 Bash Golf Part 2</a><br /> -<br /> -<h2 style='display: inline'>TCP/IP networking</h2><br /> +<ul> +<li><a href='#bash-golf-part-1'>Bash Golf Part 1</a></li> +<li>⇢ <a href='#tcpip-networking'>TCP/IP networking</a></li> +<li>⇢ <a href='#process-substitution'>Process substitution</a></li> +<li>⇢ <a href='#grouping'>Grouping</a></li> +<li>⇢ <a href='#expansions'>Expansions</a></li> +<li>⇢ <a href='#--aka-stdin-and-stdout-placeholder'>- aka stdin and stdout placeholder</a></li> +<li>⇢ <a href='#alternative-argument-passing'>Alternative argument passing</a></li> +<li>⇢ <a href='#-aka-the-null-command'>: aka the null command</a></li> +<li>⇢ <a href='#no-floating-point-support'>(No) floating point support</a></li> +</ul><br /> +<h2 style='display: inline' id='tcpip-networking'>TCP/IP networking</h2><br /> <br /> <span>You probably know the Netcat tool, which is a swiss army knife for TCP/IP networking on the command line. But did you know that the Bash natively supports TCP/IP networking?</span><br /> <br /> @@ -62,7 +79,7 @@ X-Frame-Options: SAMEORIGIN <br /> <span>You would assume that this also works with the ZSH, but it doesn't. This is one of the few things which don't work with the ZSH but in the Bash. There might be plugins you could use for ZSH to do something similar, though.</span><br /> <br /> -<h2 style='display: inline'>Process substitution</h2><br /> +<h2 style='display: inline' id='process-substitution'>Process substitution</h2><br /> <br /> <span>The idea here is, that you can read the output (stdout) of a command from a file descriptor:</span><br /> <br /> @@ -142,7 +159,7 @@ foo bar baz <br /> <span>Just think a while and see whether you understand fully what is happening here.</span><br /> <br /> -<h2 style='display: inline'>Grouping</h2><br /> +<h2 style='display: inline' id='grouping'>Grouping</h2><br /> <br /> <span>Command grouping can be quite useful for combining the output of multiple commands:</span><br /> <br /> @@ -209,7 +226,7 @@ $ Expands to the process ID of the shell. In a () subshell, it expands to 1028739 </pre> <br /> -<h2 style='display: inline'>Expansions</h2><br /> +<h2 style='display: inline' id='expansions'>Expansions</h2><br /> <br /> <span>Let's start with simple examples:</span><br /> <br /> @@ -266,7 +283,7 @@ one:A one:B one:C two:A two:B two:C Linux-one:A-FreeBSD Linux-one:B-FreeBSD Linux-one:C-FreeBSD Linux-two:A-FreeBSD Linux-two:B-FreeBSD Linux-two:C-FreeBSD Linux-three:A-FreeBSD Linux-three:B-FreeBSD Linux-three:C-FreeBSD </pre> <br /> -<h2 style='display: inline'>- aka stdin and stdout placeholder</h2><br /> +<h2 style='display: inline' id='--aka-stdin-and-stdout-placeholder'>- aka stdin and stdout placeholder</h2><br /> <br /> <span>Some commands and Bash builtins use "-" as a placeholder for stdin and stdout:</span><br /> <br /> @@ -317,7 +334,7 @@ $ file - /dev/stdin: Perl script text executable </pre> <br /> -<h2 style='display: inline'>Alternative argument passing</h2><br /> +<h2 style='display: inline' id='alternative-argument-passing'>Alternative argument passing</h2><br /> <br /> <span>This is a quite unusual way of passing arguments to a Bash script:</span><br /> <br /> @@ -359,7 +376,7 @@ paul:secret <br /> <span>But the downside of it is that the variables will also be defined in your current shell environment and not just in the scripts sub-process.</span><br /> <br /> -<h2 style='display: inline'>: aka the null command</h2><br /> +<h2 style='display: inline' id='-aka-the-null-command'>: aka the null command</h2><br /> <br /> <span>First, let's use the "help" Bash built-in to see what it says about the null command:</span><br /> <br /> @@ -446,7 +463,7 @@ bash: 1: command not found... 4 </pre> <br /> -<h2 style='display: inline'>(No) floating point support</h2><br /> +<h2 style='display: inline' id='no-floating-point-support'>(No) floating point support</h2><br /> <br /> <span>I have to give a plus-point to the ZSH here. As the ZSH supports floating point calculation, whereas the Bash doesn't:</span><br /> <br /> @@ -473,20 +490,21 @@ bash: line 1: 1/10.0 : syntax error: invalid arithmetic operator (error token is <br /> <span>See you later for the next post of this series.</span><br /> <br /> +<span>E-Mail your comments to <span class='inlinecode'>paul@nospam.buetow.org</span> :-)</span><br /> +<br /> <span>Other related posts are:</span><br /> <br /> -<a class='textlink' href='./2021-05-16-personal-bash-coding-style-guide.html'>2021-05-16 Personal Bash coding style guide</a><br /> -<a class='textlink' href='./2021-06-05-gemtexter-one-bash-script-to-rule-it-all.html'>2021-06-05 Gemtexter - One Bash script to rule it all</a><br /> -<a class='textlink' href='./2021-11-29-bash-golf-part-1.html'>2021-11-29 Bash Golf Part 1 (You are currently reading this)</a><br /> +<a class='textlink' href='./2023-12-10-bash-golf-part-3.html'>2023-12-10 Bash Golf Part 3</a><br /> <a class='textlink' href='./2022-01-01-bash-golf-part-2.html'>2022-01-01 Bash Golf Part 2</a><br /> -<br /> -<span>E-Mail your comments to <span class='inlinecode'>paul@nospam.buetow.org</span> :-)</span><br /> +<a class='textlink' href='./2021-11-29-bash-golf-part-1.html'>2021-11-29 Bash Golf Part 1 (You are currently reading this)</a><br /> +<a class='textlink' href='./2021-06-05-gemtexter-one-bash-script-to-rule-it-all.html'>2021-06-05 Gemtexter - One Bash script to rule it all</a><br /> +<a class='textlink' href='./2021-05-16-personal-bash-coding-style-guide.html'>2021-05-16 Personal Bash coding style guide</a><br /> <br /> <a class='textlink' href='../'>Back to the main site</a><br /> <p class="footer"> -Generated by <a href="https://codeberg.org/snonux/gemtexter">Gemtexter 2.1.0-release</a> | -served by <a href="https://www.OpenBSD.org">OpenBSD</a>/<a href="https://man.openbsd.org/httpd.8">httpd(8)</a> | -<a href="https://www.foo.zone/site-mirrors.html">Site Mirrors</a> +Generated with <a href="https://codeberg.org/snonux/gemtexter">Gemtexter 3.0.1-develop</a> | +served by <a href="https://www.OpenBSD.org">OpenBSD</a>/<a href="https://man.openbsd.org/relayd.8">relayd(8)</a>+<a href="https://man.openbsd.org/httpd.8">httpd(8)</a> | +<a href="https://foo.zone/site-mirrors.html">Site Mirrors</a> </p> </body> </html> |