blob: da6f653a2df1157463ff882aa50c1a7abffe6ee2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
<html>
<head>
<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 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="//skarnet.org/default.css" /> -->
</head>
<body>
<p>
<a href="index.html">execline</a><br />
<a href="//skarnet.org/software/">Software</a><br />
<a href="//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="elgetopt.html">elgetopt</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>
|
