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NAME | SYNOPSIS | DESCRIPTION | OPTION | NOTES | SEE ALSO | AUTHOR | AVAILABILITY | COLOPHON |
SETPRIV(1) User Commands SETPRIV(1)
setpriv - run a program with different Linux privilege settings
setpriv [options] program [arguments]
Sets or queries various Linux privilege settings that are inherited
across execve(2).
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
call.
--clear-groups
Clear supplementary groups.
-d, --dump
Dump current privilege state. Can be specified more than once
to show extra, mostly useless, information. Incompatible with
all other options.
--groups group...
Set supplementary groups. The argument is a comma-separated
list.
--inh-caps (+|-)cap... or --ambient-caps (+|-)cap... or
--bounding-set (+|-)cap...
Set the inheritable capabilities, ambient 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, the current
ambient set for --ambient-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.
--keep-groups
Preserve supplementary groups. Only useful in conjunction
with --rgid, --egid, or --regid.
--init-groups
Initialize supplementary groups using initgroups(3). Only
useful in conjunction with --ruid or --reuid.
--list-caps
List all known capabilities. This option must be specified
alone.
--no-new-privs
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
like:
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
allowed.
--selinux-label label
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).
--apparmor-profile profile
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.
-V, --version
Display version information and exit.
-h, --help
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.
runuser(1), su(1), prctl(2), capabilities(7)
Andy Lutomirski ⟨luto@amacapital.net⟩
The setpriv command is part of the util-linux package and is
available from Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
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
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2017-07-05. 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 man-pages@man7.org
util-linux July 2014 SETPRIV(1)
Pages that refer to this page: runuser(1), setpriv(1), su(1), capabilities(7), credentials(7)