d253b557a3
By default, the 'getopt32' call will continue parsing the command line even after hitting a non-option string. But in setpriv, this should be avoided, as all parameters following the initial non-option argument are in fact arguments to the binary that is to be executed by setpriv. Otherwise, calling e.g. 'busybox setpriv ls -l' would result in an error due to the unknown parameter "-l". Fix the issue by passing "+" as the first character in the options string. This will cause 'getopt32' to stop processing after hitting the first non-option. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* setpriv implementation for busybox based on linux-utils-ng 2.29
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*
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* Copyright (C) 2017 by <assafgordon@gmail.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*
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*/
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//config:config SETPRIV
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//config: bool "setpriv"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: select LONG_OPTS
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//config: help
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//config: Run a program with different Linux privilege settings.
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//config: Requires kernel >= 3.5
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//applet:IF_SETPRIV(APPLET(setpriv, BB_DIR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_SETPRIV) += setpriv.o
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//usage:#define setpriv_trivial_usage
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//usage: "[OPTIONS] PROG [ARGS]"
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//usage:#define setpriv_full_usage "\n\n"
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//usage: "Run PROG with different privilege settings\n"
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//usage: "\n--nnp,--no-new-privs Ignore setuid/setgid bits and file capabilities"
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//setpriv from util-linux 2.28:
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// -d, --dump show current state (and do not exec anything)
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// --nnp, --no-new-privs disallow granting new privileges
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// --inh-caps <caps,...> set inheritable capabilities
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// --bounding-set <caps> set capability bounding set
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// --ruid <uid> set real uid
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// --euid <uid> set effective uid
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// --rgid <gid> set real gid
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// --egid <gid> set effective gid
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// --reuid <uid> set real and effective uid
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// --regid <gid> set real and effective gid
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// --clear-groups clear supplementary groups
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// --keep-groups keep supplementary groups
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// --groups <group,...> set supplementary groups
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// --securebits <bits> set securebits
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// --selinux-label <label> set SELinux label
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// --apparmor-profile <pr> set AppArmor profile
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#include <sys/prctl.h>
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#include "libbb.h"
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#ifndef PR_SET_NO_NEW_PRIVS
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#define PR_SET_NO_NEW_PRIVS 38
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#endif
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int setpriv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int setpriv_main(int argc UNUSED_PARAM, char **argv)
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{
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static const char setpriv_longopts[] ALIGN1 =
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"nnp\0" No_argument "\xff"
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"no-new-privs\0" No_argument "\xff"
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;
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int opts;
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opt_complementary = "-1";
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applet_long_options = setpriv_longopts;
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opts = getopt32(argv, "+");
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if (opts) {
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if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0))
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bb_simple_perror_msg_and_die("prctl: NO_NEW_PRIVS");
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}
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argv += optind;
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BB_EXECVP_or_die(argv);
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}
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