setpriv — run a program with different Linux privilege settings
setpriv [options] program
Sets or queries various Linux privilege settings that are inherited across execve(2).
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 list.
cap... or −−bounding−set (+|−)
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 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
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
List all known capabilities. This option must be specified alone.
Set the no_new_privs bit.
With this bit set, execve(2) will not
grant new privileges. For example, the setuid and
setgid 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
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
−−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
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.
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
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.
The setpriv command is part of the util-linux package and is available from Linux Kernel Archive