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Full Discussion: Do not allow bypassing users .profile
Operating Systems AIX Do not allow bypassing users .profile Post 302938442 by omonoiatis9 on Monday 16th of March 2015 10:37:49 AM
Old 03-16-2015
[QUOTE=-=XrAy=-;302937118]You are right. I guess the realy safe way is removing this option from bash through modifying the source code and building a custom version.

- download your favourite bash version from https://ftp.gnu.org/gnu/bash/
- modify the shell.c and replace the following line '{ "noprofile", Int, &no_profile, (char **)0x0 },' through ' /* { "noprofile", Int, &no_profile, (char **)0x0 }, */'
- build your custom version
Code:
./configure
make

test it:
Code:
 
./bash --noprofile
./bash: --noprofile: invalid option
Usage:    ./bash [GNU long option] [option] ...
    ./bash [GNU long option] [option] script-file ...
GNU long options:
    --debug
    --debugger
    --dump-po-strings
    --dump-strings
    --help
    --init-file
    --login
    --noediting
    --norc
    --posix
    --rcfile
    --restricted
    --verbose
    --version
Shell options:
    -ilrsD or -c command or -O shopt_option        (invocation only)
    -abefhkmnptuvxBCHP or -o option

Code:
# make a backup from your original bash bevor replacing them ;)
cp bash /bin/bash

Regards

---------- Post updated at 22:56 ---------- Previous update was at 22:51 ----------

i did the things that you suggested and it works perfectly now. the --noprofile option does not exist anymore and also when i tried to run the command that i said earlier the session closes as soon as i enter the password.
however i have some questions about the implementation of this new bash version that i created.
shall i just copy the bash command to my library directory or do i need to do something else first? i mean i need to uninstall bash and install it again? it does not effect the "whole bash package"?
 

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LEARN ABOUT CENTOS

bashbug-64

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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