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2017-08-07users,w,who,uptime,renice: make NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07script: -f means "flush", not "fsync"Denys Vlasenko
function old new delta packed_usage 31765 31768 +3 script_main 1102 1082 -20 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07script: make -t[FILE] compatible with util-linuxDenys Vlasenko
function old new delta script_main 1056 1102 +46 packed_usage 31736 31765 +29 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 75/0) Total: 75 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07script: make -t independent of scriptreplayDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06sv,svc: fix NOEXEC falloutDenys Vlasenko
function old new delta svc_main 145 162 +17 sv 1280 1297 +17 status 139 133 -6 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 34/-6) Total: 28 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06readprofile: do not close/free just before exitingDenys Vlasenko
function old new delta readprofile_main 1784 1762 -22 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06blkdiscard: make it NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06blkid: make it NOEXEC, make FEATURE_BLKID_TYPE=y defaultDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05lspci,lsscsi,lsusb: make them NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05umount: make it NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05pivot_root: make it NOFORKDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05blockdev, fsfreeze, fstrim, mountpoint: make NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04make 17 state-changing execing applets (ex: "nice PROG ARGS") noexecDenys Vlasenko
The applets with "<applet> [opts] PROG ARGS" API very quickly exec another program, noexec is okay for them: chpst/envdir/envuidgid/softlimit/setuidgid chroot chrt ionice nice nohup setarch/linux32/linux64 taskset cttyhack "reset" and "sulogin" applets don't have this form, but also exec another program at once, thus made noexec too. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04mesg: make in NOFORKDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04chat: trim help textDenys Vlasenko
Noticed while auditing nofork/noexec status function old new delta packed_usage 31777 31747 -30 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03getopt: make it NOEXECDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02line editing: make read_line_input() not take timeout paramDenys Vlasenko
It's almost always -1. function old new delta read_line_input 3902 3912 +10 new_line_input_t 24 31 +7 pgetc 583 585 +2 save_command_ps_at_cur_history 80 78 -2 read_line 76 74 -2 fgetc_interactive 246 244 -2 addLines 84 82 -2 doCommands 2226 2222 -4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/5 up/down: 19/-12) Total: 7 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02do not use `a' quoting style in commentsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27config: more tweaking of help textsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27rdate: tweak comments, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27swapon: do not use FEATURE_MOUNT_LABEL, have your own FEATURE_SWAPONOFF_LABELDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27config: trim/improve item names and help texts, take 2Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25volume_id: enable minix detectionDenys Vlasenko
function old new delta volume_id_probe_minix - 87 +87 fs2 64 68 +4 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 1/0 up/down: 91/0) Total: 91 bytes Patch by wdlkmpx <wdlkmpx@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21config: deindent all help textsDenys Vlasenko
Those two spaces after tab have no effect, and always a nuisance when editing. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-19swapon/swapoff: trim config help textDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-19Update remaining menuconfig items with approximate applet sizesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-18Update menuconfig items with approximate applet sizesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15fix more instances of ": $((a++))" in shell scriptsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15blkdiscard: provide our own BLK[SEC]DISCARD if necessaryDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-10inetd,mount: do not die if uclibc without RPC is detectedDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07setpriv: remove dependency on libcap headersDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07setpriv: factor out capability name printingDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07setpriv: code shrink, and grouping capability code togetherDenys Vlasenko
function old new delta static.versions - 3 +3 getcaps 174 149 -25 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07setpriv: allow modifying ambient capabilitiesPatrick Steinhardt
With Linux 4.3, a new set of capabilities has been introduced with the ambient capabilities. These aim to solve the problem that it was impossible to grant run programs with elevated privileges across non-root users. Quoting from capabilities(7): This is a set of capabilities that are preserved across an execve(2) of a program that is not privileged. The ambient capability set obeys the invariant that no capability can ever be ambient if it is not both permitted and inheritable. With this new set of capabilities it is now possible to run an executable with elevated privileges as a different user, making it much easier to do proper privilege separation. Note though that the `--ambient-caps` switch is not part of any released version of util-linux, yet. It has been applied in 0c92194ee (setpriv: support modifying the set of ambient capabilities, 2017-06-24) and will probably be part of v2.31. function old new delta parse_cap - 174 +174 setpriv_main 1246 1301 +55 .rodata 146307 146347 +40 static.setpriv_longopts 40 55 +15 packed_usage 32092 32079 -13 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07setpriv: allow modifying inheritable capsPatrick Steinhardt
The main use case of setpriv is to modify the current state of privileges available to the calling process and spawn a new executable with the modified, new state. Next to the already supported case of modifying the no-new-privs flag, util-linux also supports to modify capability sets. This commit introduces to add or drop capabilities from the set of inheritable capabilities. Quoting from capabilities(7): This is a set of capabilities preserved across an execve(2). Inheritable capabilities remain inheritable when executing any program, and inheritable capabilities are added to the permitted set when executing a program that has the corresponding bits set in the file inheritable set. As such, inheritable capabilities enable executing files with certain privileges if the file itself has these privileges set. Note though that inheritable capabilities are dropped across execve when running as a non-root user. function old new delta getcaps - 237 +237 setpriv_main 1129 1246 +117 .rodata 146198 146307 +109 static.setpriv_longopts 29 40 +11 packed_usage 32107 32092 -15 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06setpriv: dump ambient capabilitiesPatrick Steinhardt
As with the previous commit, this commit introduces the ability to dump the set of ambient capabilities. function old new delta setpriv_main 982 1129 +147 .rodata 146148 146198 +50 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06setpriv: dump capability bounding setPatrick Steinhardt
As with the previous commit, this one implements the ability to dump the capability bounding set. function old new delta setpriv_main 838 982 +144 .rodata 146101 146148 +47 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06setpriv: dump inheritable capability setPatrick Steinhardt
The setpriv executable from util-linux also dumps out information on the different capability sets known by the kernel. By default, these are the inheritable capabilities, bounding capabilities and (not yet released) the ambient capabilities, which have been introduced with Linux 4.3. This patch introduces the ability to dump the set of inheritable capabilities. By default, setpriv(1) identifies capabilities by their human-readable name, for example 'net_admin'. For unknown capabilities, though, it does instead use the capability's value, for example 'cap_12', which is equivalent to 'net_admin'. As there is no kernel interface to retrieve capability names by their index, we have to declare these ourselves, which adds to setpriv's size. To counteract, using the human-readble name has been made configurable. The following sizes are with the 'FEATURE_SETPRIV_CAPABILITY_NAMES' enabled: function old new delta .rodata 145969 146405 +436 setpriv_main 467 842 +375 capabilities - 304 +304 And with 'FEATURE_SETPRIV_CAPABILITY_NAMES' disabled: function old new delta setpriv_main 467 838 +371 .rodata 145969 146101 +132 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06setpriv: dump no-new-privs infoPatrick Steinhardt
Introduce the ability to dump the state of the no-new-privs flag, which states whethere it is allowed to grant new privileges. function old new delta setpriv_main 419 467 +48 .rodata 145926 145969 +43 Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-04setpriv: dump user and group infoDenys Vlasenko
setpriv from util-linux has an option to dump the current state regarding privilege settings via '--dump'. It prints out information on the real and effective user and group IDs, supplementary groups, the no-new-privs flag, the capability sets as well as secure bits. This patch is the start of supporting this mode. To make introduction of the '--dump' easier to reason about, its introduction has been split into multiple patches. This particular one introduces the ability to print out user and group information of the current process. function old new delta setpriv_main 89 322 +233 getresuid - 41 +41 getresgid - 41 +41 static.setpriv_longopts 22 29 +7 packed_usage 31675 31669 -6 ------------------------------------------------------------------------------ (add/remove: 4/0 grow/shrink: 2/1 up/down: 322/-6) Total: 316 bytes Patch by Patrick Steinhardt <ps@pks.im> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-04setpriv: prepare option parsing logic for additional optsPatrick Steinhardt
The current option parsing logic of setpriv only supports the case where we want to execute a sub-program and have at most one argument. Refactor handling of options to solve these shortcomings to make it easy to support 'setpriv --dump', which does not accept any additional arguments, as well as the case where additional options are passed to setpriv. This is done by handling 'argc' ourselves, throwing an error when no program is specified, as well as introducing an enum for the different option bitmasks. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-04setpriv: do not process remaining argsPatrick Steinhardt
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>
2017-07-03fixes for bugs found by make_single_applets.shDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-06-14unshare: fix help text; select LONG_OPTS instead depending on themDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-06-14setpriv: new appletAssaf Gordon
Add a minimal 'setpriv' implementation supporting the NO_NEW_PRIVS bit. Typical usage: $ busybox setpriv sudo uname Linux $ busybox setpriv --nnp sudo uname sudo: effective uid is not 0, is /usr/bin/sudo on a file system with the 'nosuid' option set or an NFS file system without root privileges? function old new delta packed_usage 31580 31685 +105 setpriv_main - 87 +87 prctl - 53 +53 static.setpriv_longopts - 22 +22 applet_names 2620 2628 +8 applet_main 1516 1520 +4 ------------------------------------------------------------------------------ (add/remove: 5/0 grow/shrink: 3/0 up/down: 279/0) Total: 279 bytes Signed-off-by: Assaf Gordon <assafgordon@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-17Spelling fixes in comments, documentation, tests and examplesDenys Vlasenko
By klemens <ka7@github.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-12libbb: GETOPT_RESET macroKaarle Ritvanen
Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-12Sort more misplaced applets into coreutils or util-linuxDenys Vlasenko
No code changes Surprisingly, nice and renice are coming from different packages :) Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-12Sort some miscutils/ applets into coreutils or util-linuxDenys Vlasenko
No code changes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-11fallocate: new appletDenys Vlasenko
NAME fallocate - preallocate or deallocate space to a file SYNOPSIS fallocate [-c|-p|-z] [-o offset] -l length [-n] filename fallocate -d [-o offset] [-l length] filename DESCRIPTION fallocate is used to manipulate the allocated disk space for a file, either to deallocate or preallocate it. For filesystems which support the fallocate system call, preallocation is done quickly by allocating blocks and marking them as uninitialized, requiring no IO to the data blocks. This is much faster than creating a file by filling it with zeroes. function old new delta fallocate_main - 179 +179 applet_names 2597 2606 +9 applet_main 1504 1508 +4 applet_suid 94 95 +1 applet_install_loc 188 189 +1 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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