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setpriv [options] program [arguments]
Sets or queries various Linux privilege settings that are inherited
Dumps current privilege state. Specify more than once to show
extra, mostly useless, information. Incompatible with all other
Sets 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 privilege. 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 Docu-
mentation/prctl/no_new_privs.txt in the Linux kernel source.
The no_new_privs bit is supported since Linux 3.5.
--inh-caps (+|-)cap,... or --bounding-set (+|-)cap,...
Sets inheritable capabilities or 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.
Lists all known capabilities. Must be specified alone.
--ruid uid, --euid uid, --reuid uid
Sets the real, effective, or both uids. The uid argument can be
given as textual login name.
Setting 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:
--reuid=1000 --regid=1000 --caps=-all
--rgid gid, --egid gid, --regid gid
Sets the real, effective, or both gids. The gid argument can be
given as textual group name.
Sets or clears securebits. 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.
Requests 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 par-
ticular, this is unlikely to work in conjunction with no_new_
privs.) This is similar to runcon(1).
Requests 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 conse-
quences. 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
util-linux January 2013 SETPRIV(1)