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...
These 2 Users Gave Thanks to cnamejj For This Post:
10 More Discussions You Might Find Interesting
1. Programming
Hi
How to pass multi line text as a command line argument to a program.
(i.e)
./a.out hi this is sample 0 file1
where
hi this is sample should be stored in argv
0 in argv and so on... (3 Replies)
Discussion started by: bankpro
3 Replies
2. UNIX for Dummies Questions & Answers
Hi all,
How many arguments can we pass while testing a prgm at command line..
I encountered an issue while passing 10 arguments.
For $10 its taking argument passed for $1 followed by 'zero'.
can we pass more than 9 arguments /Is there any other way.
Thanks,
rrs (6 Replies)
Discussion started by: rrs
6 Replies
3. Shell Programming and Scripting
Hi all
i want to list out all command line arguments except $1 i have passed to a script.
Ex: sh cmdline.sh one two three four five
o/p:
two three four five (3 Replies)
Discussion started by: naree
3 Replies
4. Shell Programming and Scripting
--------------------------------------------------------------------------------
I have this while loop and at the end I am trying to get it to tell me the last argument I entered. And with it like this all I get is the sentence with no value for $1. Now I tried moving done after the sentence... (1 Reply)
Discussion started by: skooly5
1 Replies
5. Shell Programming and Scripting
Hi,
When i am running the following script 1.sh (without giving the command line arguments) then i am getting the following error.
if
then
echo "UID and PWD are correct"
elif
then
echo "Either UID or PWD is wrong. Please check your UID and PWD"
else
echo "UID and PWD can't be blank"... (9 Replies)
Discussion started by: sunitachoudhury
9 Replies
6. UNIX for Dummies Questions & Answers
I am working on a script wherein i need the user to enter the Build ID
for eg:the command line will show
enter the build ID
Now on entering the build ID it should be assigned to @ARGV.
How can this be done.? (1 Reply)
Discussion started by: Varghese
1 Replies
7. Shell Programming and Scripting
Is there a way of hiding a process, or at the very least, process arguments?
I'm writing a hosting panel (PHP), and I need to be able to adduser and do other tasks in which I do not want the arguments shown on the termnial for other users of the system.
Thanks (0 Replies)
Discussion started by: jaymac407
0 Replies
8. UNIX for Dummies Questions & Answers
Hi, I'm having problems with a script where I wanted every single option specified in the command line to have an argument taken with it, but for some reason only d works in the code I will be showing below.
For example if I did ./thisfile -a something
it would come up with "a chosen with " as... (2 Replies)
Discussion started by: IceX
2 Replies
9. UNIX for Dummies Questions & Answers
hi, can someone how to accept command line arguments as a variable using in script?
like: ./scriptname arguments
by accept arguments, I can use it in my script?
thx! (1 Reply)
Discussion started by: ikeQ
1 Replies
10. Shell Programming and Scripting
hi,,,,
I want to create a command prompt, for example "prompt>", so my prompt need to handle commands, for example "prompt>cmd", so i want to know how to get arguments for my own commands cmd, i.e. default argc should contain arguments count and argv should point to the argument vector i.e, for... (2 Replies)
Discussion started by: vins_89
2 Replies
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)