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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2018-03-16 08:18:53 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2018-03-16 08:18:53 +0000 |
| commit | 77a47b2c5e7c3243743bd8d7594366f498e9cef7 (patch) | |
| tree | fb807c0b0c20db34f5108df67da6b4d64e5bc8e6 /doc/foreground.html | |
| parent | 3fde941ae33bd70edf015b3c72997aef703ebf6d (diff) | |
| download | execline-77a47b2c5e7c3243743bd8d7594366f498e9cef7.tar.xz | |
More modifications, and doc change
Diffstat (limited to 'doc/foreground.html')
| -rw-r--r-- | doc/foreground.html | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/doc/foreground.html b/doc/foreground.html index c9c0703..b7cf906 100644 --- a/doc/foreground.html +++ b/doc/foreground.html @@ -3,9 +3,9 @@ <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta http-equiv="Content-Language" content="en" /> - <title>execline: the foreground command</title> - <meta name="Description" content="execline: the foreground command" /> - <meta name="Keywords" content="execline command foreground" /> + <title>execline: the ; command</title> + <meta name="Description" content="execline: the ; command" /> + <meta name="Keywords" content="execline command ;" /> <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> </head> <body> @@ -16,10 +16,10 @@ <a href="//skarnet.org/">skarnet.org</a> </p> -<h1> The <tt>foreground</tt> program </h1> +<h1> The <tt>;</tt> program </h1> <p> -<tt>foreground</tt> executes a sequence of commands. +<tt>;/tt> executes a sequence of commands. </p> <h2> Interface </h2> @@ -29,35 +29,35 @@ </p> <pre> - foreground { <em>prog1...</em> } <em>prog2...</em> + ; { <em>prog1...</em> } <em>prog2...</em> </pre> <ul> - <li> <tt>foreground</tt> reads <em>prog1</em> in a + <li> <tt>;</tt> reads <em>prog1</em> in a <a href="el_semicolon.html">block</a>. It forks and executes it, then waits for it to complete. </li> - <li> <tt>foreground</tt> sets the <tt>?</tt> environment + <li> <tt>;</tt> sets the <tt>?</tt> environment variable to the exit code of <em>prog1</em>. If <em>prog1...</em> was killed by a signal, the <tt>?</tt> value is 256 plus the signal number. </li> - <li> <tt>foreground</tt> then execs into <em>prog2...</em>. </li> + <li> <tt>;</tt> then execs into <em>prog2...</em>. </li> </ul> <h2> Notes </h2> <ul> - <li> <tt>foreground</tt> is the basic sequence operator: it takes two + <li> <tt>;</tt> is the basic sequence operator: it takes two commands and executes them one by one. execline scripts require it to wrap external commands that exit instead of natively supporting the "perform some action, then execute some other program" model. </li> - <li> <tt>foreground <em>prog1...</em> "" <em>prog2...</em></tt> is + <li> <tt>; <em>prog1...</em> "" <em>prog2...</em></tt> is equivalent to <tt>sh -c '<em>prog1...</em> ; exec <em>prog2...</em>'</tt>. </li> <li> 256 and above are not valid exit codes for commands, so when the <tt>?</tt> environment variable contains 256 or more, it means that the previous command was killed by a signal. There is no ambiguity here, and <tt>?</tt> reports exactly what happened to the previous command; -<tt>foreground</tt> does not exit, so there is no need for +<tt>;</tt> does not exit, so there is no need for <a href="exitcodes.html">exit code approximation</a>. </li> </ul> |