Running a script as root in the script Post: 303007449

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Top Forums Programming Running a script as root in the script Post 303007449 by Don Cragun on Thursday 16th of November 2017 05:57:16 PM

11-16-2017

Registered User

Quote:

Originally Posted by robertkwild

Hi Robin yes im confused, what do you mean sudo_user

do you mean for every command i have in my script put sudo infront of it

then i thought instead of putting sudo infront of every command just make the user type su and job done ie from there it will run all the commands as root

I thought I explained this in post #4 in this thread when I said:

Quote:

Nothing in your script after invoking su will be run with root privileges. The su utility, if given a proper password, will start a shell and nothing in the rest of your script will be run until that shell exits.

Once a user types the root password in response to invoking the command su (without operands), they can then type any commands into the shell that su starts for them and it will run those commands with all of the privileges of someone who logged in as root. When they exit that super-user shell, your script will then continue running with the same privileges as the user who invoked that utility had when they invoked your script. No commands in your script after the shell started by su exits will run with root privileges unless it was root who invoked your script to being with.

The here-document trick I also showed you in that post can be used to feed commands into that super-user shell. The text in that here-document is just read and executed by the shell that su starts; it is not that su is running commands in your script.

The logical easy way to do this (if a user who is going to run your script knows the root password and wants to run your script with root privileges) is for them to run su and then while in the shell that su starts have them run your script and do whatever else they need to do as root before exiting that super-user shell.

Don Cragun

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LEARN ABOUT LINUX

gzexe

GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME

       gzexe - compress executable files in place

SYNOPSIS

       gzexe name ...

DESCRIPTION

       The  gzexe  utility  allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a
       penalty in performance).  For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files:
	   -rwxr-xr-x  1 root root 1026675 Jun	7 13:53 /usr/bin/gdb
	   -rwxr-xr-x  1 root root 2304524 May 30 13:02 /usr/bin/gdb~
       /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file.  You can remove /usr/bin/gdb~ once  you  are
       sure that /usr/bin/gdb works properly.

       This utility is most useful on systems with very small disks.

OPTIONS

       -d     Decompress the given executables instead of compressing them.

SEE ALSO

       gzip(1), znew(1), zmore(1), zcmp(1), zforce(1)

CAVEATS

       The  compressed executable is a shell script.  This may create some security holes.  In particular, the compressed executable relies on the
       PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail).

BUGS

       gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually  in  some  cases,
       using chmod or chown.

																	  GZEXE(1)

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