Sudo has no access to exported bash function Post: 303040917

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Top Forums UNIX for Beginners Questions & Answers Sudo has no access to exported bash function Post 303040917 by jcdole on Saturday 9th of November 2019 11:06:45 AM

11-09-2019

Registered User

Quote:

Originally Posted by gull04

Hi,

You can preserve your current environment if you have been granted sufficient rights to do so with the -E switch or --preserve-env switch.

Regards

Gull04

My test show that does not work for function as Corona688 just said.

Thank you

--- Post updated at 18:06 ---

Quote:

Originally Posted by Corona688

These files are used on login. sudo bash is not a login.

Environment variables are external memory designed to be shared. Functions are part of a shell's internals and are not. For sudo bash to have a function, it will need to source that file.

Code:

#!/bin/bash

. /etc/bash.bashrc.local

 function_1

sudo often blocks environment variables, by the way, to prevent people putting in strange values for EDITOR and the like and executing them with dangerous privileges.

That mean that any script I run which need to be started with sudo needs to contains something like that :

Code:

#
# ~/test_001.sh
#

. /path/to/my_list_of_functions


#
# Code followed

#

But if the same script may be run by normal user, my functions will be sourced twice
One times by the login process via /etc/profile.local
One times by the code added on top of script.
What happens ?

Any comment is welcome.

jcdole

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openvt

OPENVT(1)							     Linux 1.x								 OPENVT(1)

NAME

       openvt - start a program on a new virtual terminal (VT).

SYNOPSIS

       openvt [-c vtnumber] [OPTIONS] [--] command

DESCRIPTION

       openvt  will  find the first available VT, and run on it the given command with the given command options, standard input, output and error
       are directed to that terminal. The current search path ($PATH) is used to find the requested command. If no command is specified  then  the
       environment variable $SHELL is used.

   OPTIONS
       -c, --console=VTNUMBER
	      Use the given VT number and not the first available. Note you must have write access to the supplied VT for this to work;

       -f, --force
	      Force opening a VT without checking whether it is already in use;

       -e, --exec
	      Directly execute the given command, without forking.  This option is meant for use in /etc/inittab;

       -s, --switch
	      Switch to the new VT when starting the command. The VT of the new command will be made the new current VT;

       -u, --user
	      Figure out the owner of the current VT, and run login as that user.  Suitable to be called by init. Shouldn't be used with -c or -l;

       -l, --login
	      Make the command a login shell. A - is prepended to the name of the command to be executed;

       -v, --verbose
	      Be a bit more verbose;

       -w, --wait
	      wait  for command to complete. If -w and -s are used together then openvt will switch back to the controlling terminal when the com-
	      mand completes;

       -V, --version
	      print program version and exit;

       -h, --help
	      show this text and exit.

       --     end of options to openvt.

NOTE

       If openvt is compiled with a getopt_long() and you wish to set options to the command to be run, then you must supply the end of options --
       flag before the command.

EXAMPLES

       openvt can be used to start a shell on the next free VT, by using the command:

       openvt bash

       To start the shell as a login shell, use:

       openvt -l bash

       To get a long listing you must supply the -- separator:

       openvt -- ls -l

HISTORY

       Earlier, openvt was called open.  It was written by Jon Tombs <jon@gtex02.us.es or jon@robots.ox.ac.uk>.  The -w idea is from "sam".

SEE ALSO

       chvt(1), doshell(8), login(1)

19 Jul 1996							       V1.4								 OPENVT(1)

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