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Full Discussion: On korn shell, how to share history between regular user and root?
Top Forums Shell Programming and Scripting On korn shell, how to share history between regular user and root? Post 303027859 by DevuanFan on Wednesday 26th of December 2018 10:16:10 PM
Old 12-26-2018
That's a good idea, but I wanted something more real-time, so I came up with a hack. If I put this in both ~/.kshrc and /root/.kshrc, I get what I want:



Code:
prompt_commands()
{
    if [ $(id -u) = "0" ]; then
        tail -1 /root/.ksh_history >>/home/bruno/.ksh_history
    else
        tail -1 /home/bruno/.ksh_history >>/root/.ksh_history
    fi
}

PS1='$(prompt_commands)'

Unlike bash, ksh does not have the handy PROMPT_COMMAND. However, the PS1 variable does support command substitution, which my hack exploits. As long as both user's and root's history files have write permission for "others", now whenever root runs a command that command gets appended to my regular user's history, and vice-versa.
Last edited by DevuanFan; 12-27-2018 at 02:21 PM..
This User Gave Thanks to DevuanFan For This Post:
Neo
 

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LEARN ABOUT OSX

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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