diff options
| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
| commit | f316a2ed52195135a35e32d7096e876357c48c69 (patch) | |
| tree | 5f4486b9a5a213a69e66ef574d6bc643a207981c /doc/foreground.html | |
| download | execline-f316a2ed52195135a35e32d7096e876357c48c69.tar.xz | |
initial commit: rc for execline-2.0.0.0
Diffstat (limited to 'doc/foreground.html')
| -rw-r--r-- | doc/foreground.html | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/doc/foreground.html b/doc/foreground.html new file mode 100644 index 0000000..a2a465f --- /dev/null +++ b/doc/foreground.html @@ -0,0 +1,57 @@ +<html> + <head> + <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" /> + <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">execline</a><br /> +<a href="http://skarnet.org/software/">Software</a><br /> +<a href="http://skarnet.org/">skarnet.org</a> +</p> + +<h1> The <tt>foreground</tt> program </h1> + +<p> +<tt>foreground</tt> executes a sequence of commands. +</p> + +<h2> Interface </h2> + +<p> + In an <a href="execlineb.html">execlineb</a> script: +</p> + +<pre> + foreground { <em>prog1...</em> } <em>prog2...</em> +</pre> + +<ul> + <li> <tt>foreground</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 +variable to the exit code of <em>prog1</em>. If <em>prog1...</em> +did not exit normally, the <tt>?</tt> value is 111. </li> + <li> <tt>foreground</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 +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 +equivalent to <tt>sh -c '<em>prog1...</em> ; exec <em>prog2...</em>'</tt>. + </li> +</ul> + +</body> +</html> |