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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
| commit | f316a2ed52195135a35e32d7096e876357c48c69 (patch) | |
| tree | 5f4486b9a5a213a69e66ef574d6bc643a207981c /doc/emptyenv.html | |
| download | execline-f316a2ed52195135a35e32d7096e876357c48c69.tar.xz | |
initial commit: rc for execline-2.0.0.0
Diffstat (limited to 'doc/emptyenv.html')
| -rw-r--r-- | doc/emptyenv.html | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/doc/emptyenv.html b/doc/emptyenv.html new file mode 100644 index 0000000..81cf45a --- /dev/null +++ b/doc/emptyenv.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 emptyenv program</title> + <meta name="Description" content="execline: the emptyenv program" /> + <meta name="Keywords" content="execline command emptyenv" /> + <!-- <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>emptyenv</tt> program </h1> + +<p> +<tt>emptyenv</tt> empties the current environment, or cleans it up; then +executes a program. +</p> + +<h2> Interface </h2> + +<pre> + emptyenv [ -p ] <em>prog...</em> + emptyenv -c <em>prog...</em> + emptyenv [ -o ] [ -P ] <em>prog...</em> +</pre> + +<p> +By default, <tt>emptyenv</tt> unsets all environment variables, then +execs into <em>prog</em> with its arguments. Options control which +environment variables are unset. +</p> + +<h2> Options </h2> + +<ul> + <li> <tt>-p</tt> : keep the <tt>PATH</tt> environment variable. </li> + <li> <tt>-c</tt> : clean up. Do not empty the environment. Instead, +remove every variable used internally by the execline programs, to avoid +any interference with or information leakage to external programs. </li> + <li> <tt>-o</tt> : <a href="el_pushenv.html#pop">pop</a> environment +variables starting with <tt>ELGETOPT_</tt>. You might want to do this +before executing a final program from a script that uses +<a href="elgetpositionals.html">elgetpositionals</a>. </li> + <li> <tt>-P</tt> : <a href="el_pushenv.html#pop">pop</a> environment +variables starting with <tt>#</tt>, <tt>0</tt> to <tt>9</tt>, and +<tt>EXECLINE_</tt>. You might want to do this before executing a final program +from a script launched by <a href="execlineb.html">execlineb</a>. </li> +</ul> + +</body> +</html> |