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[Solved] Sudo not working in Konsole (/dev/pts)
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ShadowHawk92
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Joined: 04 Mar 2013
Posts: 14
Location: Texas, USA

PostPosted: Sat Mar 23, 2013 1:45 am    Post subject: [Solved] Sudo not working in Konsole (/dev/pts) Reply with quote

Solved Apparently it's a feature not a bug. Use sudo -S to read from stdin.

I have a strange problem with sudo.

Sudo works fine in tty, but not in Konsole (/dev/pts*). When I use sudo in Konsole, it appears to just hang for a minute or so until it times out.
Actually what's happening is it's prompting for my password in tty1 (ctl+alt+F1). I can switch over and type my password but the behavior there is strange too (I assume it will be fixed when sudo prompts in the appropriate tty).

I can (in Konsole) run:
sudo - and it will print the help text,
sudo -n <command> - and it will tell me that a password is required.
sudo <command> - IF %wheel ALL=(ALL) NOPASSWD: ALL is uncommented.
su -c <command>
I can not run:
sudo <command> - because of the password prompt problem,
sudo -l - it still prompts for password in the wrong tty.

I have messed around with my settings in visudo, notably adding:
Code:
Defaults requiretty

Then changing it to:
Code:
Defaults !requiretty

to no avail. I also uncommented and recommented Defaults env_keep += "HOME" and Defaults env_keep += "XDG_SESSION_COOKIE".
I have also changed some pam settings, but nothing made a difference.

The problem seems to be isolated in how sudo prompts for a password, and I can't figure out why.

Additional info:
I installed Gentoo on my (old) desktop before this as a test and installed XFCE on it. I had the same problem there too with Xterm and XFCE4-terminal.
The computer is booting from a custom initramfs I wrote (with a lot of help from the wiki) and in order to get gpg to work I have to run the command
Code:
cp -a /dev/console /dev/tty

in the init script. I can't imagine this is the problem because running
Code:
tty

prints tty1 in tty1 and pts{1,2,3,etc} in Konsole.

Here is my current /etc/sudoers. I can give pam config files if needed.

Code:
/etc/sudoers
## sudoers file.
##
## This file MUST be edited with the 'visudo' command as root.
## Failure to use 'visudo' may result in syntax or file permission errors
## that prevent sudo from running.
##
## See the sudoers man page for the details on how to write a sudoers file.
##

##
## Host alias specification
##
## Groups of machines. These may include host names (optionally with wildcards)
## IP addresses, network numbers or netgroups.
# Host_Alias    WEBSERVERS = www1, www2, www3

##
## User alias specification
##
## Groups of users.  These may consist of user names, uids, Unix groups,
## or netgroups.
# User_Alias    ADMINS = millert, dowdy, mikef

##
## Cmnd alias specification
##
## Groups of commands.  Often used to group related commands together.
# Cmnd_Alias    PROCESSES = /usr/bin/nice, /bin/kill, /usr/bin/renice, \
#                           /usr/bin/pkill, /usr/bin/top

##
## Defaults specification
##
## You may wish to keep some of the following environment variables
## when running commands via sudo.
##
## Locale settings
#Defaults env_keep += "LANG LANGUAGE LINGUAS LC_* _XKB_CHARSET"
##
## Run X applications through sudo; HOME is used to find the
## .Xauthority file.  Note that other programs use HOME to find
## configuration files and this may lead to privilege escalation!
#Defaults env_keep += "HOME"
##
## X11 resource path settings
Defaults env_keep += "XAPPLRESDIR XFILESEARCHPATH XUSERFILESEARCHPATH"
##
## Desktop path settings
Defaults env_keep += "QTDIR KDEDIR"
##
## Allow sudo-run commands to inherit the callers' ConsoleKit session
Defaults env_keep += "XDG_SESSION_COOKIE"
##
## Uncomment to enable special input methods.  Care should be taken as
## this may allow users to subvert the command being run via sudo.
# Defaults env_keep += "XMODIFIERS GTK_IM_MODULE QT_IM_MODULE QT_IM_SWITCHER"
##
## Uncomment to enable logging of a command's output, except for
## sudoreplay and reboot.  Use sudoreplay to play back logged sessions.
# Defaults log_output
# Defaults!/usr/bin/sudoreplay !log_output
# Defaults!/usr/local/bin/sudoreplay !log_output
# Defaults!/sbin/reboot !log_output

## Runas alias specification
##

##
## User privilege specification
##
# root ALL=(ALL) ALL

## Uncomment to allow members of group wheel to execute any command
%wheel ALL=(ALL) ALL

## Same thing without a password
# %wheel ALL=(ALL) NOPASSWD: ALL

## Uncomment to allow members of group sudo to execute any command
# %sudo ALL=(ALL) ALL
#                           /usr/bin/pkill, /usr/bin/top
#

## Uncomment to allow any user to run sudo if they know the password
## of the user they are running the command as (root by default).
# Defaults targetpw  # Ask for the password of the target user
# ALL ALL=(ALL) ALL  # WARNING: only use this together with 'Defaults targetpw'

## Read drop-in files from /etc/sudoers.d
## (the '#' here does not indicate a comment)
#includedir /etc/sudoers.d

## Set timeout to 15 minutes
Defaults timestamp_timeout=15
## Keep display
Defaults env_keep += "DISPLAY"
## Require tty
Defaults !requiretty
## Adding insult to injury
Defaults insults


Edit: Spelling.
Update 2013-03-25: sudo -S prompts for password correctly. I can make an alias that works, but a non-alias solution is prefered.
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teknocrust
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Joined: 03 Feb 2013
Posts: 11

PostPosted: Sat Apr 27, 2013 5:36 pm    Post subject: Fixed! Reply with quote

Hey all this same issue has been plaguing me forever!!

Here is the fix

See here: https://forums.gentoo.org/viewtopic.php?p=7298374
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