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Full Discussion: Running a script as root in the script
Top Forums Programming Running a script as root in the script Post 303007380 by Don Cragun on Wednesday 15th of November 2017 09:05:18 PM
Old 11-15-2017
I'm confused by several things in this thread...

The command id -u root will return the string 0 on any UNIX system. The current real or effective UID of the person running the script has no effect on the results produced by this command.

The test command [ id -u root -ne 0 ] does not run the id command; it invokes test with the five arguments id, -u, root, -ne, and 0. And that is not a valid set of arguments to be given to the test utility.

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.

If you were running the id command, the exit code of that utility is not related to the uid or euid of the user running the process; it only tells you whether or not the user you name with the -u option is known on your system.

Would something more like:
Code:
if [ "$LOGNAME" != "root" ]
then	echo 'type in root password'
	su <<EOF
		sh command_file
EOF
else	sh command_file
fi

where command_file is the pathname of a file containing the commands you want this script to run with root privileges.
 

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LEARN ABOUT MOJAVE

chroot

CHROOT(8)						    BSD System Manager's Manual 						 CHROOT(8)

NAME

     chroot -- change root directory

SYNOPSIS

     chroot [-u -user] [-g -group] [-G -group,group,...] newroot [command]

DESCRIPTION

     The chroot command changes its root directory to the supplied directory newroot and exec's command, if supplied, or an interactive copy of
     your shell.

     If the -u, -g or -G options are given, the user, group and group list of the process are set to these values after the chroot has taken
     place.  See setgid(2), setgroups(2), setuid(2), getgrnam(3) and getpwnam(3).

     Note, command or the shell are run as your real-user-id.

ENVIRONMENT

     The following environment variable is referenced by chroot:

     SHELL  If set, the string specified by SHELL is interpreted as the name of the shell to exec.  If the variable SHELL is not set, /bin/sh is
	    used.

SEE ALSO

     chdir(2), chroot(2), environ(7)

HISTORY

     The chroot utility first appeared in 4.4BSD.

SECURITY CONSIDERATIONS

     chroot should never be installed setuid root, as it would then be possible to exploit the program to gain root privileges.

4.3 Berkeley Distribution					  October 6, 1998					 4.3 Berkeley Distribution
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