How to enforce user to Enter text when login to a UNIX / Linux system? Post: 303001837

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Top Forums Shell Programming and Scripting How to enforce user to Enter text when login to a UNIX / Linux system? Post 303001837 by bakunin on Friday 11th of August 2017 06:42:12 PM

08-11-2017

Registered User

Quote:

Originally Posted by mohtashims

Yes, i m testing this out. once good with the scripts i will change the log location.

This is not the point Corona688 has raised: your script, when called from the login routine of a user, runs with the credentials of this user. To append the text the user enters to the log file the user has to be allowed to write to this file.

But because he is allowed to write the file he is also free to remove any content from the file - he could reduce it to zero length. So your whole mechanism is flawed from the beginning.

Since shell scripts cannot run as SUID (that is, run with the effective privileges of another user, not the one executing it) you will need to write a C- (or any other programming language you can compile to an object deck) program which takes the text and then writes it to a log file not writable by the user itself.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT OSX

scheduler

ICECREAM(1)						      Icecream User's Manual						       ICECREAM(1)

NAME

       scheduler - Icecream scheduler

SYNOPSIS

       scheduler [-n | --netname name] [-p | --port port] [-h | --help] [-l | --log-file file] [-d | --daemonize] [-r | --allow-run-as-user]
		 [-v [v [v]]]

DESCRIPTION

       The Icecream scheduler is the central instance of an Icecream compile network. It distributes the compile jobs and provides  the  data  for
       the monitors.

OPTIONS

       -n, --netname netname
	      The name of the Icecream network the scheduler controls.

       -p, --port port
	      IP port the scheduler uses.

       -h, --help
	      Print help message.

       -l, --log-file logfile
	      Name of file where log output is written to.

       -d, --daemonize
	      Detach daemon from shell.

       -v, -vv, -vvv
	      Control verbosity of daemon. The more v the more verbose.

       -r, --allow-run-as-user
	      Force running the scheduler with user rights. Usually you will need to run the scheduler with root rights.

SEE ALSO

       icecream, scheduler, iceccd, icemon

AUTHOR

       Cornelius Schumacher

Icecream							 April 21th, 2005						       ICECREAM(1)