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Top Forums Shell Programming and Scripting Bash scripting mask password from ps Post 303023676 by aixkidbee on Thursday 20th of September 2018 09:41:56 PM
Old 09-20-2018
Quote:
Originally Posted by MadeInGermany
The prefixed PW= is a temporary environment assignment in the invoking shell, and not part of the command arguments.
Comparable to
Code:
export PW=top_secret; ./script ... ; unexport PW

Access via ps ewww or pargs -e or /proc/pid/environ is denied for other (non-root-)users.
Exporting a env variable e.g export PW=hi
./script PW ssh user@server "date"

This will not work. It will NOT pass the password argument PW variable to ps output, but the actual password itself.

Here is what I captured as another user other than my own.
xxxxx 15728704 14745672 0 00:32:28 pts/2 0:00 ./script hi ssh -o StrictHostKeyChecking=no user@server date

Clearly showing the password.
 

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NWFSTIME(1)							     nwfstime							       NWFSTIME(1)

NAME
nwfstime - Display / Set a NetWare server's date and time SYNOPSIS
nwfstime [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -C ] [ -s ] DESCRIPTION
nwfstime displays a NetWare server's date and time. You can also set a NetWare server's date and time from the local time. OPTIONS
-h With -h nwfstime prints a little help text. -S server is the name of the server you want to use. -U user user is the user name to use for login. To set the server's time, you need supervisor privileges. -P password password is the password to use for login. If neither -n nor -P are given, and the user has no open connection to the server, nwfstime prompts for a password. -n -n should be given if no password is required for the login. As you need supervisor privileges for setting the date and time, this option is probably not used very often. -C By default, passwords are converted to uppercase before they are sent to the server, because most servers require this. You can turn off this conversion by -C. -s With -s, nwfstime sets the file server's date and time according to the local date and time. nwfstime 12/10/1996 NWFSTIME(1)
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