Make signal table a bit smaller

get_signum                                           136     151     +15
signals                                              224     192     -32

guard against SIGxxx >= 32 (no code changes on i386)

getty: don't accept ancient '#' and '@' as backspace/kill line,
it only confuses people.
(Alexander Griesser <alexander.griesser@lkh-vil.or.at> (LKH Villach))
various other cleanups.

function                                             old     new   delta
getty_main                                          2526    2546     +20
static.baud_index                                      4       -      -4
parse_speeds                                          91       -     -91
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/0 up/down: 20/-95)            Total: -75 bytes
   text    data     bss     dec     hex filename
 773152    1086    9008  783246   bf38e busybox_old
 773081    1086    9008  783175   bf347 busybox_unstripped

lineedit: reduce stack usage
netstat: reduce stack usage; fix handling of NULs in unix socket filenames

static.has_inode                                       1       -      -1
do_info                                              119     116      -3
deinit_S                                              60      51      -9
unix_do_one                                          578     451    -127
parse_and_put_prompt                                 966     825    -141
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/4 up/down: 0/-281)           Total: -281 bytes

fix whitespace damage

mkfs.minix: add testsuite; disable code which makes images variable

attack the biggest stack users:
-mkfs_minix_main [busybox_unstripped]:                  4288
-mkfs_minix_main [busybox_unstripped]:                  4276
-grave [busybox_unstripped]:                            4260
(bzip2 users too - not listed)

price we pay in code size increase:
mainSort                                            2458    2515     +57
grave                                               1005    1058     +53
sendMTFValues                                       2177    2195     +18
BZ2_blockSort                                        122     125      +3
mkfs_minix_main                                     3070    3022     -48
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/1 up/down: 131/-48)            Total: 83 bytes

explain why we use mmap instead of malloc

libnetlink: comment out unused code; don't use 8k stack buffers

function                                             old     new   delta
ipaddr_modify                                       1305    1297      -8
do_iprule                                            963     955      -8
do_iproute                                          2193    2169     -24
xrtnl_dump_filter                                    418     391     -27
rtnl_talk                                            671     536    -135
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/5 up/down: 0/-202)           Total: -202 bytes

Fix minor discrepancy in "make help"

Introduce FEATURE_COPYBUF_KB.
People who want smaller stack at any cost may use it
to reduce cp's stack usage (FEATURE_COPYBUF_KB=1).
Desktop people may get faster copy of big files
(FEATURE_COPYBUF_KB=32 is ~30% faster than 4kb)

dd: fix a bug where we don't report write errors
testsuite: small cleanup

full_write_or_warn                                    38      40      +2
write_and_stats                                       66      67      +1
dd_main                                             1358    1335     -23
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 3/-23)             Total: -20 bytes

dd: add testsuite entry for write errors

test: stop using lots of bss.

function                                             old     new   delta
test_main                                            425     456     +31
t_lex                                                 69      73      +4
syntax                                               100     104      +4
ptr_to_statics                                         8      12      +4
t_wp_op                                                4       -      -4
t_wp                                                   4       -      -4
ngroups                                                4       -      -4
group_array                                            4       -      -4
binop                                                590     585      -5
oexpr                                                104      97      -7
aexpr                                                101      94      -7
nexpr                                                831     820     -11
leaving                                              156       -    -156
------------------------------------------------------------------------------
(add/remove: 0/5 grow/shrink: 4/4 up/down: 43/-202)          Total: -159 bytes
   text    data     bss     dec     hex filename
 775098     929    9084  785111   bfad7 busybox_old
 775107     933    8908  784948   bfa34 busybox_unstripped

dhcp: heed TODO item - divorced options from their string descriptions
code shrink while at it.

function                                             old     new   delta
dhcp_option_strings                                    -     258    +258
udhcp_run_script                                    1135    1174     +39
dhcp_option_lengths                                    -      11     +11
udhcp_add_simple_option                               93      92      -1
packet_num                                             4       -      -4
read_opt                                             746     739      -7
udhcp_option_lengths                                  11       -     -11
udhcpc_main                                         2590    2494     -96
dhcp_options                                         490      70    -420
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/4 up/down: 308/-539)         Total: -231 bytes
   text    data     bss     dec     hex filename
 775309     929    9100  785338   bfbba busybox_old
 775098     929    9084  785111   bfad7 busybox_unstripped

sysctl: add -e: supress warnings about invalid key (Jeremy Kerr <jk@ozlabs.org>)
code shrink:

   text    data     bss     dec     hex filename
 775565     929    9100  785594   bfcba busybox_old
 775296     929    9100  785325   bfbad busybox_unstripped

Further optimize applet tables; prettify build output

   text    data     bss     dec     hex filename
 775923     929    9100  785952   bfe20 busybox_old
 775565     929    9100  785594   bfcba busybox_unstripped

touch: accept and ignore -f

dhcpc: let server know we don't like oversized packets.
add TODO comment

forgotten part of previous commit

reorganize applet table. Eliminates pointers to names.
Should be a big win for libbusybox. busybox wins too:

   text    data     bss     dec     hex filename
 776524     929    9100  786553   c0079 busybox_old
 775903     929    9100  785932   bfe0c busybox_unstripped

ip route: add comment, no code changes

iproute: fix a bug where "ip r flush table main" was rejected,
add "ip r flush cache" (however I'm unsure it is really valid syntax)
Add a few comments and stop mixing params and params' keywords.

fix vda's testsuite bogons, part 2

fix vda's testsuite bogons, part 1

testsuite: add tests for cut and grep;
slight improvements to infrastructure

ash: make code simpler, and do not do close(-1) - it's rude

zcip: simplify code a bit

zcip: use low-order 4 bytes of MAC as random seed, not 4 high-order
arping: fix wrong roundtrip calculation
arping,zcip: cleanups and code shrink

run                                                  389     402     +13
arp                                                  195     188      -7
zcip_main                                           1524    1495     -29
arping_main                                         1874    1823     -51
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 13/-87)            Total: -74 bytes
   text    data     bss     dec     hex filename
 776587     929    9100  786616   c00b8 busybox_old
 776499     929    9100  786528   c0060 busybox_unstripped

cttyhack should be in /bin, not /usr/bin

which: fix testsuite failure
pidof: do not output empty line if nothing found
testsuite: disable false positive

dhcpc: cope with buggy DHCP servers which send oversized packets
(Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn@axis.com>)

Announce 1.8.2 and 1.7.4

stty: reorganize data tables - save 0.5k

function                                             old     new   delta
mode_name                                              -     496    +496
control_name                                           -      91     +91
stty_main                                           1235    1255     +20
find_mode                                             45      63     +18
find_control                                          45      63     +18
do_display                                           482     493     +11
wrapf                                                165     166      +1
set_mode                                             761     759      -2
max_col                                                4       -      -4
device_name                                            4       -      -4
control_info                                         153      34    -119
mode_info                                           1700     680   -1020
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 5/3 up/down: 655/-1149)        Total: -494 bytes
   text    data     bss     dec     hex filename
 777037     937    9100  787074   c0282 busybox_old
 776551     929    9100  786580   c0094 busybox_unstripped

remove echo_main -> bb_echo indirection

hush: fix segfault in "echo $@" when we have no arguments

fix buglets found by randomconfig

update defconfig

kill lash. "lash" builtin still exists, but it runs hush.

Add an RFC for future ipv6 ftp work

hush: implement echo builtin

builtin_echo                                           -      36     +36
bltins                                               384     396     +12
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 48/0)               Total: 48 bytes

hush: fix $ expansion in redirections, add testcase for that

hush: implement test builtin

hush: plug memory leak

arping: fix help text (-i -> -I), and shorten it a bit

arping: fix a bug where there is implicit count of 4G;
eliminate data/bss usage; code shrink

function                                             old     new   delta
timeout_us                                             4       -      -4
static.start                                           4       -      -4
src                                                    4       -      -4
sock                                                   4       -      -4
sent                                                   4       -      -4
req_recv                                               4       -      -4
received                                               4       -      -4
last                                                   4       -      -4
dst                                                    4       -      -4
count                                                  4       -      -4
brd_sent                                               4       -      -4
brd_recv                                               4       -      -4
catcher                                              375     365     -10
me                                                    20       -     -20
he                                                    20       -     -20
arping_main                                         1941    1874     -67
------------------------------------------------------------------------------
(add/remove: 0/14 grow/shrink: 0/2 up/down: 0/-165)          Total: -165 bytes
   text    data     bss     dec     hex filename
 783035     941    9244  793220   c1a84 busybox_old
 782907     937    9156  793000   c19a8 busybox_unstripped

cut: add proper stdout error handling, fix "-" handling;
modest code shrink

logread: add forgotten INIT_G();

logread: eliminate usage of data/bss
ifup: don't remove virtual iface prefixes (eth0:0)

function                                             old     new   delta
shbuf                                                  4       -      -4
SMrup                                                  6       -      -6
SMrdn                                                 12       -     -12
static.label_buf                                      20       4     -16
get_var                                              158     140     -18
------------------------------------------------------------------------------
(add/remove: 0/3 grow/shrink: 0/2 up/down: 0/-56)             Total: -56 bytes
   text    data     bss     dec     hex filename
 783501     962    9260  793723   c1c7b busybox_old
 783483     942    9244  793669   c1c45 busybox_unstripped

dhcp: stop using magic constants; use (htonl(CONST) != a) - it's smaller

function                                             old     new   delta
udhcp_get_packet                                     146     134     -12
get_raw_packet                                       368     353     -15

udhcpc: remove -W option, -A can be reused for that
help texts: trimmed a bit

static.udhcpc_longopts                               227     209     -18
udhcpc_main                                         2633    2590     -43
packed_usage                                       22927   22871     -56
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-117)           Total: -117 bytes

fix a thinko in build system

ash: fix bug where redirection of closed fd was leaving it open afterwards.

redirect                                             983    1024     +41
bb_echo                                              276     301     +25
popredir                                             118     132     +14
evalcommand                                         1163    1176     +13
bbunpack                                             358     366      +8
echocmd                                               13       5      -8
echo_main                                             13       5      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/2 up/down: 101/-16)            Total: 85 bytes
   text    data     bss     dec     hex filename
 774999     962    9236  785197   bfb2d busybox_old
 775084     962    9236  785282   bfb82 busybox_unstripped

sestatus: new SELinux applet (KaiGai Kohei <kaigai@ak.jp.nec.com>)

dhcpc: cleanup and comments; fix buggy timeout handling in corner cases.
-25 bytes.

udhcpc: an option to perform ARP check (Jonas Danielsson <jonas.danielsson@axis.com>)
configurable, ~+300 bytes when on.

cleanup comments and coding style and rewrite the mdev.conf parser to use common busybox functions and call strdup() less often ... saves a ~few hundred bytes

ip: stop propagating argc; optimize ip_parse_common_args

function                                             old     new   delta
find_pair                                            167     187     +20
static.families                                        -      17     +17
die_must_be_on_off                                     -      11     +11
...
on_off                                                33      22     -11
do_ipaddr                                            103      90     -13
do_iptunnel                                         1001     986     -15
iproute_list_or_flush                               1237    1217     -20
static.ip_common_commands                             43      22     -21
do_iproute                                          2217    2193     -24
parse_args                                          1444    1414     -30
ip_do                                                 47      16     -31
do_iprule                                            994     963     -31
ip_main                                              153     113     -40
ipaddr_modify                                       1357    1305     -52
ipaddr_list_or_flush                                2543    2490     -53
ip_parse_common_args                                 294     159    -135
------------------------------------------------------------------------------
(add/remove: 4/1 grow/shrink: 4/24 up/down: 85/-563)         Total: -478 bytes
   text    data     bss     dec     hex filename
 775561     966    9236  785763   bfd63 busybox_old
 775073     962    9236  785271   bfb77 busybox_unstripped

stty: mark variable as static

make output a little more friendly

merge from upstream for systems that dont integrate libintl into their C library:

commit aa1e5ef5c1d95e7ebf0821d9ba27debe43a87a22
Author: Sam Ravnborg <sam@ravnborg.org>
Date:   Sun Aug 12 23:15:44 2007 +0200

    kbuild: check if we can link gettext not just compile

    cygwin provides the header file but the lib file needs
    to be added manually. A generic fix is to check if
    we can compile and link a program that uses gettext()
    and if it fails fall back to NO_NLS.

    International users of cygwin may have to specify
    HOST_LOADLIBES := "-lintl" on the make command line.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

exported symbols may be weak, so allow symbols marked as W

syslogd: use DEV_CONSOLE consistently
init: remove obsolete comment

hexdump: add hd alias, add -R option

add comment clarifying busybox's use of non-standard tar header

tar: fix a case where glibc detects bogus buffer overrun
     which is not really there!

dmesg,klogd: make code more readable
libbb: explain why we declare klogctl
libbb: move defs around so that order makes more sense

- use standard-imposed constants some more

- remove most of the forward declarations. No obj-code changes.

- add note about SUSv3 missing options.

who: add -a (by Tito)

lash: fix compile-time warning

df: add -a
df: don't special case rootfs and /dev/root

function                                             old     new   delta
df_main                                              746     684     -62
find_block_device                                    111       -    -111
find_block_device_in_dir                             243       -    -243
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/1 up/down: 0/-416)           Total: -416 bytes

df: add -i (conditional on CONFIG)
uasge: trim a bit

cosmetic change in message text

bad syntax error should go to stderr

Introduce FEATURE_PREFER_IPV4_ADDRESS. If selected, we have:
function                                             old     new   delta
str2sockaddr                                         328     344     +16

tr: more of code shrink (getopt32-ification)
runtest: cleanup. Method of getting $applets was truly bizarre

function                                             old     new   delta
tr_main                                              655     527    -128

tr: better comments, small code shrink

function                                             old     new   delta
expand                                              2232    2230      -2
tr_main                                              677     655     -22

tr: properly detect read errors (Fernando Silveira <fsilveira@gmail.com>)
readprofile: use xwrite

function                                             old     new   delta
tr_main                                              679     677      -2
readprofile_main                                    1964    1944     -20

trylink: accomodate older versions of ld

who: code shrink by Tito <farmatito@tiscali.it>

function                                             old     new   delta
who_main                                             271     259     -12

add sed mini-doc

sed: support GNU-like '\t' escape in substitutions

inetd: revert bogus fix for bug 1562; shrink inetd a bit

function                                             old     new   delta
dupconfig                                            159     146     -13
getconfigent                                        1123    1073     -50

open_transformer: do not duplicate "<program> -cf -"

   text    data     bss     dec     hex filename
 677858     738    7236  685832   a7708 busybox_old
 677804     738    7236  685778   a76d2 busybox_unstripped

gzip: fix a case where tar xzf fails (we use uninitialized fd)

who: fix wrong date/time field size

Announce 1.8.1

init: fix bug 1584: improper check for fork error

umount: stop using excessive aounts of stack. Surprisingly,
code shrank a lot too

function                                             old     new   delta
umount_main                                          751     640    -111

lineedit: stop using both data/bss and tons of stack.
stack usage was ~10 kb!
unfortunately, noticeable code size growth:
   text    data     bss     dec     hex filename
   9252      12     181    9445    24e5 busybox.t7/libbb/lineedit.o
   9714       4       0    9718    25f6 busybox.t8/libbb/lineedit.o

*: remove superfluous "?" in option parsing

readlink: realpath requires PATH_MAX, bb_common_bufsiz1 can be too small
umount: don't actually need char[2 * PATH_MAX] for realpath

syslogd: support "symlink to symlink" for /dev/log; reduce stack usage

function                                             old     new   delta
create_socket                                          -     134    +134
syslogd_main                                        1132     865    -267
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 134/-267)         Total: -133 bytes
   text    data     bss     dec     hex filename
 775603     974    9420  785997   bfe4d busybox_old
 775445     974    9420  785839   bfdaf busybox_unstripped

- commentary fixes
- use common exit sequence for failure path:
   text    data     bss     dec     hex filename
    308       0       0     308     134 libbb/xreadlink.o.pgf
    296       0       0     296     128 libbb/xreadlink.o

xmalloc_follow_symlinks() -- fix ELOOP issue with absolute paths,
return full path in cases where path doesn't resolve to a link.
change name to better differentiate from xmalloc_readlink().

xreadlink: code shrink
udhcp: add missing tryagain member to client_config

function                                             old     new   delta
xmalloc_readlink_follow                              169     154     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-15)             Total: -15 bytes

follow symlinks to find the true passwd file before updating.

new xmalloc_readlink_follow() routine to fully expand trailing symlinks
to get to a "real" file (or directory).