Age | Commit message (Collapse) | Author |
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The array applet_nameofs consumes two bytes per applet. It encodes
nofork/noexec flags
suid flags
the offset of the applet name in the applet_name string
Change the applet_table build tool to store the flags in two separate
arrays (applet_flags and applet_suid). Replace applet_nameofs[] with a
smaller version that only stores a limited number of offsets.
This requires changes to the macros APPLET_IS_NOFORK, APPLET_IS_NOEXEC
and APPLET_SUID.
According to Valgrind the original find_applet_by_name required
353 cycles per call, averaged over all names. Adjusting the number
of known offsets allows space to be traded off against execution time:
KNOWN_OFFSETS cycles bytes (wrt KNOWN_OFFSETS = 0)
0 9057 -
2 4604 32
4 2407 75
8 1342 98
16 908 130
32 884 194
This patch uses KNOWN_OFFSETS = 8.
v2:
Remove some dead code from the applet_table tool;
Treat the applet in the middle of the table as a special case.
v3:
Use the middle applet to adjust the start of the linear search as
well as the last applet found.
v4:
Use an augmented linear search in find_applet_by_name.
Drop the special treatment of the middle name from get_applet_name:
most of the advantage now derives from the last stored value.
v5:
Don't store index in applet_nameofs, it can be calculated.
v6:
Tweaks by Denys
function old new delta
find_applet_by_name 25 125 +100
applet_suid - 92 +92
run_applet_no_and_exit 452 460 +8
run_applet_and_exit 695 697 +2
applet_name_compare 31 - -31
applet_nameofs 734 14 -720
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 3/1 up/down: 202/-751) Total: -549 bytes
text data bss dec hex filename
925464 906 17160 943530 e65aa busybox_old
924915 906 17160 942981 e6385 busybox_unstripped
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Chris Renshaw <osm0sis@outlook.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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In standalone shell mode search the applet table as well as PATH
when tab completing a command.
Use a stupid linear search: we're also about to read all the
directories on PATH so efficiency isn't a big concern.
function old new delta
add_match - 53 +53
complete_cmd_dir_file 687 724 +37
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 90/0) Total: 90 bytes
Signed-off-by: Ron Yorston <rmy@frippery.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Ron Yorston <rmy@frippery.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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MONOTONIC_SYSCALL=y by default
FEATURE_LAST_SMALL is gone: now FEATURE_LAST_FANCY is a "bool", not a "choice".
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
read_cmdline 246 266 +20
procps_get_maps 196 193 -3
packed_usage 30413 30404 -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 20/-12) Total: 8 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
bb_progress_update 706 768 +62
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
get_terminal_width - 17 +17
stty_main 1196 1197 +1
pstree_main 321 319 -2
ls_main 735 731 -4
watch_main 232 225 -7
bb_progress_update 714 706 -8
ps_main 555 543 -12
run_applet_and_exit 708 695 -13
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 18/-46) Total: -28 byte
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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systemd people are not willing to play nice with the rest of the world.
Therefore there is no reason for the rest of the world to cooperate with them.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
xget_uidgid 30 25 -5
make_device 2188 2183 -5
main 797 792 -5
get_uidgid 240 225 -15
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
print 36 65 +29
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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invarg(a,b) - "invalid argument", but how a and b enter the message?
invarg_1_to_2(a,b) is somewhat easier to read: "invalid argument 'a' to 'b'"
Audit of usage revealed a number of bad uses, with too long messages.
text data bss dec hex filename
938848 932 17448 957228 e9b2c busybox_old
938788 932 17448 957168 e9af0 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Custom linker script 'busybox_ldscript' found, using it
function old new delta
static.str 4 - -4
static.passwd 4 0 -4
bb_ask 322 311 -11
ether_print 63 47 -16
UNSPEC_print 82 66 -16
INET_sprint 59 38 -21
INET6_sprint 54 30 -24
make_human_readable_str 292 235 -57
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/7 up/down: 0/-153) Total: -153 bytes
text data bss dec hex filename
939880 992 17480 958352 e9f90 busybox_old
939736 992 17456 958184 e9ee8 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Use it in libiproute: get rid of one static string buffer.
function old new delta
auto_string - 51 +51
ll_index_to_name 10 49 +39
buffer_fill_and_print 169 178 +9
scan_recursive 378 380 +2
decode_one_format 732 734 +2
cmdputs 334 332 -2
static.cur_saved 4 1 -3
static.nbuf 16 - -16
printable_string 94 57 -37
ll_idx_n2a 53 - -53
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 4/3 up/down: 103/-111) Total: -8 bytes
text data bss dec hex filename
939880 992 17496 958368 e9fa0 busybox_old
939880 992 17480 958352 e9f90 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
xfunc_has_died - 21 +21
sleep_much - 12 +12
sleep10 - 9 +9
die_func - 4 +4
fflush_stdout_and_exit 35 36 +1
builtin_type 121 119 -2
die_sleep 4 - -4
xfunc_die 60 24 -36
hush_main 1128 1011 -117
die_jmp 156 - -156
------------------------------------------------------------------------------
(add/remove: 4/2 grow/shrink: 1/3 up/down: 47/-315) Total: -268 bytes
text data bss dec hex filename
939992 992 17652 958636 ea0ac busybox_old
939880 992 17496 958368 e9fa0 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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For CONFIG_MD5_SMALL=1:
function old new delta
md5_process_block64 925 881 -44
For CONFIG_MD5_SMALL=0:
function old new delta
md5_process_block64 1603 1586 -17
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
make_device 2182 2188 +6
parse_command 1440 1443 +3
parse_params 1497 1499 +2
install_main 773 769 -4
mkdir_main 168 160 -8
getoptscmd 641 632 -9
builtin_umask 158 147 -11
bb_parse_mode 431 410 -21
umaskcmd 286 258 -28
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/6 up/down: 11/-81) Total: -70 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Suggested by Bartosz Golaszewski.
Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Test corner cases too like looking for an empty prefix etc.
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
setsockopt_int - 23 +23
do_load 918 934 +16
setsockopt_SOL_SOCKET_int - 14 +14
setsockopt_keepalive - 10 +10
setsockopt_SOL_SOCKET_1 - 10 +10
buffer_fill_and_print 169 178 +9
setsockopt_1 - 8 +8
nfsmount 3560 3566 +6
redirect 1277 1282 +5
tcpudpsvd_main 1782 1786 +4
d6_send_kernel_packet 272 275 +3
i2cget_main 380 382 +2
ed_main 2544 2545 +1
scan_recursive 380 378 -2
nbdclient_main 492 490 -2
hash_find 235 233 -2
cmdputs 334 332 -2
parse_command 1443 1440 -3
static.two 4 - -4
ntpd_main 1039 1035 -4
const_int_1 4 - -4
const_IPTOS_LOWDELAY 4 - -4
RCVBUF 4 - -4
ntp_init 474 469 -5
change_listen_mode 316 310 -6
uevent_main 416 409 -7
arping_main 1697 1690 -7
telnet_main 1612 1603 -9
socket_want_pktinfo 42 33 -9
setsockopt_reuseaddr 21 10 -11
setsockopt_broadcast 21 10 -11
httpd_main 772 757 -15
get_remote_transfer_fd 109 94 -15
make_new_session 503 487 -16
ftpd_main 2177 2160 -17
read_bunzip 1896 1866 -30
common_traceroute_main 4099 4058 -41
common_ping_main 1836 1783 -53
------------------------------------------------------------------------------
(add/remove: 5/4 grow/shrink: 8/21 up/down: 111/-283) Total: -172 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Since there is no interest in merging a config option for WANT_TIMING,
remove the parts of code depending on it altogether.
While we're at it: add some newlines to improve readability.
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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In the initial submission struct bbunit_listelem was manipulated by
custom list functions implemented in bbunit.c. Since the tests are now
added to the list by llist_add_to_end(), which allocates the llist_t
objects behind the scenes, there's no need for the *next field.
function old new delta
unit_main 142 141 -1
bbunit_strrstr_elem 24 16 -8
bbunit_obscure_weak_pass_elem 24 16 -8
bbunit_obscure_strong_pass_elem 24 16 -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-25) Total: -25 bytes
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Introduce a library routine to package the idiom:
p = xmalloc(b, n);
memcpy(p, b, n);
and use it where possible. The example in traceroute used xzalloc
but it didn't need to.
function old new delta
xmemdup - 32 +32
last_main 834 826 -8
make_device 2321 2311 -10
common_traceroute_main 3698 3685 -13
readtoken1 3182 3168 -14
procps_scan 1222 1206 -16
forkchild 655 638 -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/6 up/down: 32/-78) Total: -46 bytes
Signed-off-by: Ron Yorston <rmy@frippery.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This patch removes stray empty line from busybox code
reported by script find_stray_empty_lines
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Linux recently gained a new config option, CONFIG_MULTIUSER, that makes
support for non-root users optional. This results in a number of syscalls
being disabled: setuid, setregid, setgid, setreuid, setresuid, getresuid,
setresgid, getresgid, setgroups, getgroups, setfsuid, setfsgid, capget,
capset.
Currently a number of busybox applets, including login, struggle to run
when CONFIG_MULTIUSER is disabled. Even the root user is unable to login:
login: can't set groups: Functi
This patch adds code to make change_identity() a nop on single user
systems. It works by recognising the signature errno value (ENOSYS, due
to the system calls being disabled) and, to avoid security risks, only
deploys when the current uid and target uid is the same.
After the patch is applied any attempt to switch to a non-root user will
fail. Thus a badly configured userspace (for example, one that tries to
start a daemon as a non-root user when the kernel cannot support this)
will report errors as one would expect.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Matt Whitlock <busybox@mattwhitlock.name>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Matt Whitlock <busybox@mattwhitlock.name>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This also removes their help texts.
function old new delta
run_applet_no_and_exit 442 452 +10
packed_usage 30713 30625 -88
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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The loop_on_EINTR argument to nonblock_immune_read is always set to 1.
function old new delta
xmalloc_reads 200 195 -5
pgetc 488 483 -5
argstr 1313 1308 -5
nonblock_immune_read 123 86 -37
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-52) Total: -52 bytes
Signed-off-by: Ron Yorston <rmy@tigress.co.uk>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Copyright years seem to be out of date, e.g. coreutils/truncate.c
has Copyright (C) 2015.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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UTMP is SVID legacy, UTMPX is mandated by POSIX.
Glibc and uClibc have identical layout of UTMP and UTMPX, both of these
libc treat _PATH_UTMPX as _PATH_UTMP so from a user-perspective nothing
changes except the names of the API entrypoints.
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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function old new delta
truncate_main - 161 +161
cwbkMG_suffixes - 128 +128
packed_usage 30443 30459 +16
applet_names 2512 2521 +9
applet_main 1456 1460 +4
parse_command 1460 1463 +3
applet_nameofs 728 730 +2
applet_install_loc 182 183 +1
dd_suffixes 112 - -112
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 10/3 up/down: 337/-133) Total: 204 bytes
Signed-off-by: Ari Sundholm <ari@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This way it can be used by other applets without duplication.
Signed-off-by: Ari Sundholm <ari@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
is_prefixed_with - 18 +18
complete_username 78 77 -1
man_main 737 735 -2
fsck_device 429 427 -2
unpack_ar_archive 80 76 -4
strip_unsafe_prefix 105 101 -4
singlemount 1054 1050 -4
rtc_adjtime_is_utc 90 86 -4
resolve_mount_spec 88 84 -4
parse_one_line 1029 1025 -4
parse_conf 1460 1456 -4
may_wakeup 83 79 -4
loadkmap_main 219 215 -4
get_irqs_from_stat 103 99 -4
get_header_cpio 913 909 -4
findfs_main 79 75 -4
fbsplash_main 1230 1226 -4
load_crontab 776 771 -5
expand_vars_to_list 1151 1146 -5
date_main 881 876 -5
skip_dev_pfx 30 24 -6
make_device 2199 2193 -6
complete_cmd_dir_file 773 767 -6
run_applet_and_exit 715 708 -7
uudecode_main 321 313 -8
pwdx_main 197 189 -8
execute 568 560 -8
i2cdetect_main 1186 1176 -10
procps_scan 1242 1230 -12
procps_read_smaps 1017 1005 -12
process_module 746 734 -12
patch_main 1903 1891 -12
nfsmount 3572 3560 -12
stack_machine 126 112 -14
process_timer_stats 449 435 -14
match_fstype 111 97 -14
do_ipaddr 1344 1330 -14
open_list_and_close 359 343 -16
get_header_tar 1795 1779 -16
prepend_new_eth_table 340 323 -17
fsck_main 1811 1794 -17
find_iface_state 56 38 -18
dnsd_main 1321 1303 -18
base_device 179 158 -21
find_keyword 104 82 -22
handle_incoming_and_exit 2785 2762 -23
parse_and_put_prompt 774 746 -28
modinfo 347 317 -30
find_action 204 171 -33
update_passwd 1470 1436 -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
update_passwd 1270 1470 +200
deluser_main 310 332 +22
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
massage_data_for_non_r_func - 90 +90
bb_internal_getpwent - 69 +69
getXXnam_r 94 162 +68
fill_bounds 131 128 -3
deluser_main 355 310 -45
complete_username 123 78 -45
getXXnam 163 90 -73
massage_data_for_r_func 103 - -103
bb_internal_getpwent_r 121 - -121
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/5 up/down: 227/-407) Total: -163 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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loopinfo.lo_file_name is not enough to uniquely identify a file on a system with
multiple mount namespaces. We could conceivably change this to dedup on
(lo_rdevice, lo_inode), but, as the comment above the deleted code notes, this
whole approach of reusing devices is racy anyway, so it seems better to stop
doing it entirely.
Signed-off-by: Kevin Wallace <k@igneous.io>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
INET_rresolve 274 214 -60
INET6_rresolve 168 85 -83
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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function old new delta
update_utmp_DEAD_PROCESS - 17 +17
telnetd_main 1685 1674 -11
mark_terminated 56 45 -11
handle_sigchld 74 63 -11
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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This removed buffer size limitations.
function old new delta
convert_to_struct - 269 +269
getXXnam_r - 204 +204
parse_common - 185 +185
getXXnam - 164 +164
tokenize - 126 +126
bb_internal_getpwent_r 102 167 +65
get_S 30 88 +58
getgrouplist_internal 195 240 +45
const_sp_db - 20 +20
const_pw_db - 20 +20
const_gr_db - 20 +20
bb_internal_endpwent 27 36 +9
bb_internal_endgrent 27 36 +9
decode_one_format 726 734 +8
bb_internal_setpwent 17 24 +7
volume_id_probe_iso9660 319 322 +3
scriptreplay_main 204 207 +3
mkfs_minix_main 2684 2687 +3
id_main 478 480 +2
hash_find 233 235 +2
pstree_main 321 322 +1
gr_off 3 4 +1
expand_one_var 1579 1578 -1
pwf 4 - -4
grf 4 - -4
pack_gzip 1787 1780 -7
addattr32 67 56 -11
buffer_fill_and_print 191 178 -13
dpkg_main 2944 2927 -17
bb_internal_setgrent 17 - -17
bb_internal_getpwuid 38 19 -19
bb_internal_getgrgid 44 19 -25
bb_internal_getpwnam 38 11 -27
bb_internal_getgrnam 44 14 -30
bb_internal_fgetpwent_r 51 - -51
bb_internal_fgetgrent_r 51 - -51
bb_internal_getspnam_r 121 42 -79
bb_internal_getpwnam_r 121 39 -82
bb_internal_getgrent_r 102 - -102
bb__parsepwent 110 - -110
bb_internal_getpwuid_r 113 - -113
bb_internal_getgrgid_r 113 - -113
bb__parsespent 120 - -120
bb_internal_getgrnam_r 121 - -121
bb__pgsreader 213 - -213
bb__parsegrent 226 - -226
------------------------------------------------------------------------------
(add/remove: 8/13 grow/shrink: 14/11 up/down: 1224/-1556) Total: -332 bytes
text data bss dec hex filename
923471 928 17684 942083 e6003 busybox_old
923167 928 17676 941771 e5ecb busybox_unstripped
Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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