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login: sanitize stdio descriptors (we are suid, need to be careful!)
shrink login and set_environment by ~100 bytes.
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set/save/restore more shared global variables whan call one applet from another
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a bit.
-916 byte
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cat: stop using stdio.h opens
libbb: introduce & use open[3]_or_warn
function old new delta
open3_or_warn - 54 +54
bb_cat 115 144 +29
open_or_warn - 25 +25
unlzma 2404 2412 +8
chattr_main 334 339 +5
xstrtoul_range_sfx 251 255 +4
telnet_main 1514 1510 -4
static.opt 4 - -4
qgravechar 122 118 -4
fuser_add_pid 61 54 -7
fuser_add_inode 154 147 -7
writeFileToTarball 1542 1534 -8
refresh 1156 1148 -8
do_show 856 846 -10
read_leases 212 200 -12
setup_redirects 236 222 -14
iproute_list_or_flush 1582 1568 -14
read_config 427 411 -16
write_leases 284 264 -20
hash_file 338 318 -20
copy_file 1760 1740 -20
do_iproute 2610 2588 -22
bb_full_fd_action 320 269 -51
open_to_or_warn 103 49 -54
fuser_main 1660 1596 -64
.rodata 131160 131096 -64
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 4/19 up/down: 125/-423) Total: -298 bytes
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busybox ip and the original ip utility behave differently when setting
the following route (verified with ip route show using the original ip
utility):
ip route add 10.0.0.138 dev eth0
Result for busybox ip:
# ip route add 10.0.0.138 dev eth0
# /usr/local/bin/ip route show
10.0.0.138 dev eth0
Result for ip:
# /usr/local/bin/ip route add 10.0.0.138 dev eth0
# /usr/local/bin/ip route show
10.0.0.138 dev eth0 scope link
A following "ip route add default via 10.0.0.138" fails for busybox
ip, since the kernel can not find a route to 10.0.0.138 (it replies
with Network is unreachable).
The reasons seems to be that the original ip utility explicitly sets
the scope after parsing all parameters. This is missing in busybox,
the attached patch fixes this. I took this from the original iproute
sources and removed some variables, which are not needed for busybox.
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"#ifndef BB_NOMMU" is a double negative
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FEATURE_SH_STANDALONE_SHELL => FEATURE_SH_STANDALONE
FEATURE_EXEC_PREFER_APPLETS => FEATURE_PREFER_APPLETS
Make SH_STANDALONE depend on PREFER_APPLETS.
getopt.c: more randomconfig-induced fixes
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no forking anymore, bunzip2 unpack routine now does all it in memory.
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rename sllep_and_die -> xfunc_die
make fflush_stdout_and_exit NOFORK-safe
fix some buglets found by randomconfig
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Saves a minor 12b.
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- mark libiproute's matches() as deprecated. Convert to index_in_(sub)str_array()!
text data bss dec hex filename
314 0 0 314 13a ip.o.orig
200 0 0 200 c8 ip.o
Using a smallint for the key would save another byte.
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This is ment to provide means to point at cruft marked for cleanup.
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(verified with objdump).
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echo: use fputs if no options are given. Code growth ~15 bytes.
Old:
# time ./busybox find $bigdir -exec echo {} \; >/dev/null
real 0m2.038s
user 0m0.761s
sys 0m0.953s
New:
# time ./busybox find $bigdir -exec echo {} \; >/dev/null
real 0m1.781s
user 0m0.781s
sys 0m0.939s
For comparison: without NOFORK:
# time find $bigdir -exec echo {} \; >/dev/null
real 1m51.129s
user 0m38.442s
sys 1m3.350s
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Put big scary warnings in relevant places.
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- shrink wget a bit
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use it for making NOFORK more practical.
touch: make it a NOFORK applet
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applets.h: +#undef APPLET_NOEXEC
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find: use NOFORK/NOEXEC; small -exec buglet also eliminated
vfork_daemon_rexec: honor PREFER_APPLETS
echo: small size improvements
find -exec echo {} \; with PREFER_APPLETS=y runs 4 times faster
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and now this fact is recorded in applets.h, not ash.c.
Several fixes to "--help + STANDALONE_SHELL" scenarios.
function old new delta
run_current_applet_and_exit - 355 +355
arith 2064 2073 +9
refresh 1148 1156 +8
getopt32 1068 1073 +5
telnet_main 1510 1514 +4
md5_sha1_sum_main 565 566 +1
xstrtoul_range_sfx 255 251 -4
packed_usage 22523 22514 -9
tryexec 255 203 -52
static.safe_applets 152 - -152
.rodata 131320 131128 -192
run_applet_by_name 869 506 -363
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 5/5 up/down: 382/-772) Total: -390 bytes
./busybox ash -c 'i=20000; while test $i != 0; do touch z; i=$((i-1)); done'
runs more than twice as fast with STANDALONE_SHELL versus without.
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fix few #ifndef ENABLE_xxx
# size busybox_old busybox_unstripped
text data bss dec hex filename
677152 2920 18208 698280 aa7a8 busybox_old
676420 2920 18208 697548 aa4cc busybox_unstripped
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function old new delta
tar_main 705 695 -10
sort_main 928 918 -10
decode_format_string 886 876 -10
run_parts_main 197 185 -12
ps_main 513 500 -13
wget_main 2764 2750 -14
awk_main 1014 1000 -14
od_main 2886 2866 -20
llist_rev 25 - -25
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/8 up/down: 0/-128) Total: -128 bytes
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recursive_actions: uppercase flag constants
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