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Top Forums Shell Programming and Scripting Prevent content of variables from showing in ps Post 303002876 by apmcd47 on Monday 4th of September 2017 07:02:07 AM
Old 09-04-2017
Quote:
Originally Posted by SkySmart
system OS: ubuntu, redhat
shell: /bin/sh

i noticed that if im running a script and i go to a separate terminal and type:

Code:
ps -efauxx | egrep "<the-script-name>"


i see that the content of all the variables in the script are all visible. How can i avoid/prevent this?
What do you think
Code:
ps -efauxx

is doing? Explain every option. Explain why you need them all. Are you mixing UCB options (e.g. ps aux) with Posix options (e.g. ps -ef)?
Quote:

the scripts in question are many and i cant paste them all in this thread. but, suffice it to say, most of the scripts are run through a pipe...i.e.

Code:
cat <script> | sh

any recommendations?
Are you seriously running your shell-scripts by the above method? Or are you doing something more like this?
Code:
sh script1 | sh script2

Andrew
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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