Sets or queries various Linux privilege settings that are inherited
The difference between the commands setpriv and su (or runuser) is
that setpriv does not use open PAM session and does not ask for
password. It's simple non-set-user-ID wrapper around execve system
Clear supplementary groups.
Dump current privilege state. Can be specified more than once
to show extra, mostly useless, information. Incompatible with
all other options.
Set supplementary groups. The argument is a comma-separated
--inh-caps (+|-)cap... or --bounding-set (+|-)cap...
Set the inheritable capabilities or the capability bounding
set. See capabilities(7). The argument is a comma-separated
list of +cap and -cap entries, which add or remove an entry
respectively. +all and -all can be used to add or remove all
caps. The set of capabilities starts out as the current
inheritable set for --inh-caps and the current bounding set
for --bounding-set. If you drop something from the bounding
set without also dropping it from the inheritable set, you are
likely to become confused. Do not do that.
Preserve supplementary groups. Only useful in conjunction
with --rgid, --egid, or --regid.
List all known capabilities. This option must be specified
Set the no_new_privs bit. With this bit set, execve(2) will
not grant new privileges. For example, the set-user-ID and
set-group-ID bits as well as file capabilities will be
disabled. (Executing binaries with these bits set will still
work, but they will not gain privileges. Certain LSMs,
especially AppArmor, may result in failures to execute certain
programs.) This bit is inherited by child processes and
cannot be unset. See prctl(2) and Documentation/prctl/no_new_privs.txt in the Linux kernel source.
The no_new_privs bit is supported since Linux 3.5.
--rgid gid, --egid gid, --regid gid
Set the real, effective, or both GIDs. The gid argument can
be given as textual group name.
For safety, you must specify one of --clear-groups, --groups,
or --keep-groups if you set any primary gid.
--ruid uid, --euid uid, --reuid uid
Set the real, effective, or both UIDs. The uid argument can
be given as textual login name.
Setting a uid or gid does not change capabilities, although
the exec call at the end might change capabilities. This
means that, if you are root, you probably want to do something
setpriv --reuid=1000 --regid=1000 --caps=-all--securebits (+|-)securebit...
Set or clear securebits. The argument is a comma-separated
list. The valid securebits are noroot, noroot_locked,
no_setuid_fixup, no_setuid_fixup_locked, and keep_caps_locked.
keep_caps is cleared by execve(2) and is therefore not
Request a particular SELinux transition (using a transition on
exec, not dyntrans). This will fail and cause setpriv(1) to
abort if SELinux is not in use, and the transition may be
ignored or cause execve(2) to fail at SELinux's whim. (In
particular, this is unlikely to work in conjunction with
no_new_privs.) This is similar to runcon(1).
Request a particular AppArmor profile (using a transition on
exec). This will fail and cause setpriv(1) to abort if
AppArmor is not in use, and the transition may be ignored or
cause execve(2) to fail at AppArmor's whim.
Display version information and exit.
Display help text and exit.
If applying any specified option fails, program will not be run and
setpriv will return with exit code 127.
Be careful with this tool -- it may have unexpected security
consequences. For example, setting no_new_privs and then execing a
program that is SELinux-confined (as this tool would do) may prevent
the SELinux restrictions from taking effect.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
firstname.lastname@example.org. This page was obtained from the
project's upstream Git repository
2017-03-13. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to email@example.com
util-linux July 2014 SETPRIV(1)