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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:
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LEARN ABOUT SUSE

pmvarrun

pmvarrun(8)							     pam_mount							       pmvarrun(8)

Name
       pmvarrun - updates /var/run/pam_mount/user

Syntax
       pmvarrun -u user [options]

Description
       A  separate  program is needed so that /var/run/pam_mount/user may be created with a pam_mount-specific security context (otherwise SELinux
       policy will conflict with gdm, which also creates file in /var/run).

       pmvarrun is flexible and can run in a number of different security setups:

   root-root
       When pmvarrun is invoked as root, /var/run/pam_mount's permission settings can be as strict as needed; usually (0755,root,root) is  a  good
       pick  as  it  gives  users the debug control over their refcount. Refcount files are given their respective owners (chowned to the user who
       logs in).

   user-user
       When invoked as the user who logs in, /var/run/pam_mount needs appropriate permissions to create a file, which means the write bit must	be
       set. It is also highly suggested to set the sticky bit in this case, so other users do not tamper with your refcount.

   root-user
       Some  programs or login helpers incorrectly call the PAM stack in a way that the login phase is done as root and the logout phase as a nor-
       mal user.  Nevertheless, pmvarrun supports this, and the same permissions as in root-root can be used. While the user may not  be  able	to
       unlink his file from /var/run/pam_mount, it will be truncated to indicate the same state.

Options
       --help, -h
	      Display help.

       --user user, -u user
	      User to handle, must be a valid username.

       --operation number, -o number
	      Increase volume count by number.

       -d     Turn on debugging.

Files
       /var/run/pam_mount/user

Author
       This  manpage  was originally written by Bastian Kleineidam <calvin@debian.org> for the Debian distribution of libpam-mount but may be used
       by others.

       See /usr/share/doc/packages/pam_mount/AUTHORS for the list of original authors of pam_mount.

pam_mount							    2008-10-08							       pmvarrun(8)
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