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/* vi: set sw=4 ts=4: */
/*
* setpriv implementation for busybox based on linux-utils-ng 2.29
*
* Copyright (C) 2017 by <assafgordon@gmail.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
*/
//config:config SETPRIV
//config: bool "setpriv"
//config: default y
//config: select PLATFORM_LINUX
//config: select LONG_OPTS
//config: help
//config: Run a program with different Linux privilege settings.
//config: Requires kernel >= 3.5
//applet:IF_SETPRIV(APPLET(setpriv, BB_DIR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_SETPRIV) += setpriv.o
//usage:#define setpriv_trivial_usage
//usage: "[OPTIONS] PROG [ARGS]"
//usage:#define setpriv_full_usage "\n\n"
//usage: "Run PROG with different privilege settings\n"
//usage: "\n--nnp,--no-new-privs Ignore setuid/setgid bits and file capabilities"
//setpriv from util-linux 2.28:
// -d, --dump show current state (and do not exec anything)
// --nnp, --no-new-privs disallow granting new privileges
// --inh-caps <caps,...> set inheritable capabilities
// --bounding-set <caps> set capability bounding set
// --ruid <uid> set real uid
// --euid <uid> set effective uid
// --rgid <gid> set real gid
// --egid <gid> set effective gid
// --reuid <uid> set real and effective uid
// --regid <gid> set real and effective gid
// --clear-groups clear supplementary groups
// --keep-groups keep supplementary groups
// --groups <group,...> set supplementary groups
// --securebits <bits> set securebits
// --selinux-label <label> set SELinux label
// --apparmor-profile <pr> set AppArmor profile
#include <sys/prctl.h>
#include "libbb.h"
#ifndef PR_SET_NO_NEW_PRIVS
#define PR_SET_NO_NEW_PRIVS 38
#endif
int setpriv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int setpriv_main(int argc UNUSED_PARAM, char **argv)
{
static const char setpriv_longopts[] ALIGN1 =
"nnp\0" No_argument "\xff"
"no-new-privs\0" No_argument "\xff"
;
int opts;
opt_complementary = "-1";
applet_long_options = setpriv_longopts;
opts = getopt32(argv, "");
if (opts) {
if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0))
bb_simple_perror_msg_and_die("prctl: NO_NEW_PRIVS");
}
argv += optind;
BB_EXECVP_or_die(argv);
}
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