Section (1) runuser
Name
runuser — run a command with substitute user and group ID
Synopsis
runuser
[options]
−u
user [ [−−
] command [ argument... ]
]
runuser
[options]
[−
] [ user [ argument...
] ]
DESCRIPTION
runuser
allows to run commands with a substitute user and group ID.
If the option −u
is not
given, it falls back to su-compatible semantics and
a shell is executed. The difference between the commands
runuser and
su is that
runuser does
not ask for a password (because it may be executed by the
root user only) and it uses a different PAM configuration.
The command runuser does not have to be
installed with set-user-ID permissions.
If the PAM session is not required then recommended solution is to use setpriv(1) command.
When called without arguments, runuser defaults to running an interactive shell as root.
For backward compatibility, runuser defaults to not
change the current directory and to only set the environment
variables HOME
and SHELL
(plus USER
and LOGNAME
if the target user
is not root). This version
of runuser uses
PAM for session management.
OPTIONS
−c, −−command=
command
-
Pass
command
to the shell with the−c
option. −f, −−fast
-
Pass
−f
to the shell, which may or may not be useful depending on the shell. −g, −−group=
group
-
The primary group to be used. This option is allowed for the root user only.
−G, −−supp−group=
group
-
Specify a supplemental group. This option is available to the root user only. The first specified supplementary group is also used as a primary group if the option
−−group
is unspecified. −, −l, −−login
-
Start the shell as a login shell with an environment similar to a real login:
o
-
clears all the environment variables except for
TERM
and variables specified by−−whitelist−environment
o
-
initializes the environment variables
HOME
,SHELL
,USER
,LOGNAME
,PATH
o
-
changes to the target user_zsingle_quotesz_s home directory
o
-
sets argv[0] of the shell to _zsingle_quotesz_
−
_zsingle_quotesz_ in order to make the shell a login shell
−m, −p, −−preserve−environment
-
Preserve the entire environment, i.e. it does not set
HOME
,SHELL
,USER
norLOGNAME
. The option is ignored if the option−−login
is specified. −s, −−shell=
shell
-
Run the specified shell instead of the default. The shell to run is selected according to the following rules, in order:
o
-
the shell specified with
−−shell
o
-
the shell specified in the environment variable
SHELL
if the−−preserve−environment
option is used o
-
the shell listed in the passwd entry of the target user
o
-
/bin/sh
If the target user has a restricted shell (i.e. not listed in /etc/shells) the
−−shell
option and theSHELL
environment variables are ignored unless the calling user is root. −−session−command=command
-
Same as
−c ,
but do not create a new session. (Discouraged.) −w, −−whitelist−environment=
list
-
Don_zsingle_quotesz_t reset environment variables specified in comma separated list when clears environment for
−−login
. The whitelist is ignored for the environment variablesHOME
,SHELL
,USER
,LOGNAME
, andPATH
. −V, −−version
-
Display version information and exit.
−h, −−help
-
Display help text and exit.
CONFIG FILES
runuser
reads the /etc/default/runuser
and /etc/login.defs
configuration files. The following configuration items are
relevant for runuser:
ENV_PATH
(string)
Defines the PATH environment variable for a regular user. The default value is
/usr/local/bin:/bin:/usr/bin
.
ENV_ROOTPATH
(string)
ENV_SUPATH
(string)
Defines the PATH environment variable for root. The default value is
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
.
ALWAYS_SET_PATH
(boolean)
If set to yes and −−login and −−preserve−environment were not specified runuser initializes
PATH
.
The environment variable PATH may be different on systems where /bin and /sbin are merged into /usr.
EXIT STATUS
runuser normally returns the exit status of the command it executed. If the command was killed by a signal, runuser returns the number of the signal plus 128.
Exit status generated by runuser itself:
1
Generic error before executing the requested command
126
The requested command could not be executed
127
The requested command was not found
FILES
/etc/pam.d/runuser
-
default PAM configuration file
/etc/pam.d/runuser-l
-
PAM configuration file if −−login is specified
/etc/default/runuser
-
runuser specific logindef config file
/etc/login.defs
-
global logindef config file
HISTORY
This runuser command was derived from coreutils_zsingle_quotesz_ su, which was based on an implementation by David MacKenzie, and the Fedora runuser command by Dan Walsh.
AVAILABILITY
The runuser command is part of the util-linux package and is available from Linux Kernel Archive
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