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Top Forums Programming Hiding commnd line arguments in ps command on Linux Post 302904701 by cnamejj on Thursday 5th of June 2014 07:53:51 PM
Old 06-05-2014
The answer to how that program work are in the URL you linked.

The called program overwrites it's arguments after making a copy of them. But as one of the other comments adds, there's still a brief period of time when the commands arguments are visible so it's not foolproof.

The only way to make sure information you want to remain private isn't exposed as a command argument is to either encrypt it first, or to have the calling and called program communicate the info some other way. You could use a file, shared memory, IPC, a pipe, etc...
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el(1)							      General Commands Manual							     el(1)

NAME
el -- program to make a tuned shell-command for Oneliner SYNOPSIS
el [-acdfhioxV] [--command cmd] [--args n] [--format fmt] [--execute] [--inpipe buf] [--outpipe buf] [--serial] [--help] [--ver- sion] [--debug] DESCRIPTION
This manual page documents briefly the el command. This manual page was written for the Debian distribution because the original program does not have a manual page. Instead, it has docu- mentation in the GNU Info format; see below. el is a program that You can make a tuned shell-command for Oneliner with. This command can send S-exp to Emacs, and this can make Emacs evaluate it, too. In other words, you can execute Emacs's function from shell-commands. And you can make Emacs work in closer cooperation with your favorite shell-commands. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the Info files. -c cmd --command cmd cmd means a function of Elisp. Command line arguments and data from stdin means arguments of cmd. If you specify the only -c switch, el output one S-exp by one line of stdin. --a n --args n Specifies the maximum number of arguments of a Elisp function with -c switch. -f fmt --format fmt Allows you to use format string of printf for making a S-exp. -x --execute Requests to Oneliner to evaluate the S-exp to use *Oneliner auto-eval* buffer. -i buf --inpipe buf Gets input from pipe-buffer. You can specify a number of pipe-buffer, too. -o buf --outpipe buf Puts output to pipe-buffer. You can specify a number of pipe-buffer, too. -s --serial Makes el to serialize multiple lines to one line. -h --help Display help message. -V --version Display version identifiers. -d --debug Enable debugging state. SEE ALSO
The programs are documented fully by Oneliner(Shell-mode hooks for Oneliners) available via the Info system. AUTHOR
This manual page was written by OHURA Makoto <ohura@debian.org> for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. el(1)
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