top: improve global CPU percentage (smaller & faster code)

top: add config option and code for global CPU % display

moved biggest stack buffers to malloc space, or made their size configurable
(8k of shell line edit buffer is an overkill)

# make ARCH=i386 bloatcheck
function                                             old     new   delta
read_line_input                                     3933    3967     +34
ifaddrlist                                           348     345      -3
do_loadfont                                          208     191     -17
edit_file                                            840     819     -21
.rodata                                           129112  129080     -32
uncompress                                          1305    1268     -37
loadfont_main                                        566     495     -71
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/6 up/down: 34/-181)          Total: -147 bytes

add script which measures stack consumption.

Current top users:

0x08052f52 uncompress []:                               393312
0x080c8a58 input_tab []:                                82104
0x08092d5b ifaddrlist []:                               32828
0x08056163 loadfont_main []:                            32796
0x0806e508 colon []:                                    16532
0x08056095 do_loadfont []:                              16400
0x0806da70 place_cursor []:                             16388
0x080792e8 login_main []:                               9176

393 kb of stack??? OMG...

httpd: move data off bss.
httpd: do not realpath() for SCRIPT_FILENAME - it resolves symlinks
but it should not:

-                /* SCRIPT_FILENAME required by PHP in CGI mode */
-               if (!realpath(purl + 1, realpath_buff))
-                       goto error_execing_cgi;
-               setenv1("SCRIPT_FILENAME", realpath_buff);
+
+               /* SCRIPT_FILENAME required by PHP in CGI mode */
+               fullpath = concat_path_file(home_httpd, purl);
+               setenv1("SCRIPT_FILENAME", fullpath);

- also note where to checkout the 1_6_stable branch

mdev: microscopic enhancement, should change nothing

grep: selection done by FEATURE_GREP_EGREP_ALIAS was broken, fix.
 (Maxime Bizon <mbizon@freebox.fr>  (Freebox))

login: ask passwords even for wrong usernames.

# size busybox_old busybox_unstripped
   text    data     bss     dec     hex filename
 680099    2704   15648  698451   aa853 busybox_old
 680110    2704   15648  698462   aa85e busybox_unstripped

make busybox --install work even if /proc/self/exe doesn't exist

# size busybox_old busybox_unstripped
   text    data     bss     dec     hex filename
 680095    2704   15648  698447   aa84f busybox_old
 680099    2704   15648  698451   aa853 busybox_unstripped

rmp: add optional support for bz2 data. +50 bytes of code

- fix invocation without any argument

hush: add missing dependencies (Maxime Bizon <mbizon@freebox.fr> (Freebox))

test: fix thinko in previous commit

test: recognize /path/to/[ case too

- Add a FAQ entry on "how do i cross compile busybox"

- add a config-time range check for IPC_SYSLOG_BUFFER_SIZE
  The upper-bound doesn't look like it is working since it accepts LONG_MAX as input. I suspect that this is an lxdialog feature or something like that ;)

awk: experimentally modify "global" trick to make code smaller
by minimizing data offsets

function                                             old     new   delta
parse_expr                                           752     782     +30
syntax_error                                          23      26      +3
nvfree                                               151     154      +3
nvalloc                                              172     175      +3
fsrealloc                                            111     114      +3
chain_node                                            99     102      +3
chain_loop                                           121     124      +3
chain_group                                          628     631      +3
awk_main                                            1002    1005      +3
awk_exit                                              99     102      +3
parse_program                                        308     310      +2
split_f0                                             172     170      -2
awk_split                                            510     507      -3
getvar_s                                             108     102      -6
awk_sub                                              643     637      -6
awk_getline                                          706     700      -6
next_token                                           943     927     -16
handle_special                                       470     446     -24
next_input_file                                      252     213     -39
evaluate                                            6703    6633     -70
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 11/9 up/down: 59/-172)         Total: -113 bytes

# size */*/awk.o
   text    data     bss     dec     hex filename
  18247       0       0   18247    4747 busybox.t0/editors/awk.o
  18134       0       0   18134    46d6 busybox.t1/editors/awk.o

- update defconfig

- i need this disabled code for testing a patch. Please leave it in.

- fix wrong not operator which was essentially ignored. got introduced in r18282
  http://busybox.net/lists/busybox/2007-June/027652.html

awk: move all data to malloc space

function                                             old     new   delta
evaluate                                            6448    6728    +280
awk_getline                                          676     705     +29
parse_expr                                           726     752     +26
next_token                                           917     943     +26
next_input_file                                      237     252     +15
awk_split                                            498     510     +12
awk_sub                                              632     643     +11
split_f0                                             160     170     +10
getvar_s                                              98     108     +10
...
chain_loop                                           128     121      -7
nvalloc                                              179     171      -8
chain_node                                           107      99      -8
mainseq                                               12       -     -12
endseq                                                12       -     -12
chain_group                                          640     628     -12
beginseq                                              12       -     -12
awk_exit                                             112     100     -12
fsrealloc                                            127     110     -17
static.v                                              20       -     -20
static.rsm                                            24       -     -24
ttt                                                   28       -     -28
parse_program                                        339     311     -28
static.sreg                                           32       -     -32
intvar                                                76       -     -76
static.tspl                                           84       -     -84
rsplitter                                             84       -     -84
fsplitter                                             84       -     -84
------------------------------------------------------------------------------
(add/remove: 0/39 grow/shrink: 16/11 up/down: 439/-685)      Total: -246 bytes

echo: fix non-fancy echo

ps: fix -Z (by Yuichi Nakamura <ynakam@hitachisoft.jp>)

remove bashisms from testsuite

nc: make connecting to IPv4 from IPv6-enabled hosts easier
(was requiring -s <local addr>)

- kiltedknight writes: Busybox incorrectly parses a line from the status file, claiming that a required package is not installed or tagged to be installed when it actually is.
  Closes #1221

- fix typo in error message. Closes #1308

uudecode: fix to base64 decode by Jorgen Cederlof <jcz@google.com>
improved help texts

# make bloatcheck
function                                             old     new   delta
.rodata                                           127000  127032     +32
packed_usage                                       22156   22151      -5
uudecode_main                                        360     348     -12
uuencode_main                                        490     468     -22
read_base64                                          283     254     -29
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/4 up/down: 32/-68)            Total: -36 bytes

snprintf(... "%s"...) => safe_strncpy

syslogd: move some vectors from data to text. Needs uclibc patch
to have any effect (patch is submitted to uclibc ml).

# size *[67]/*/syslog*.o
   text    data     bss     dec     hex filename
   3169     288       0    3457     d81 busybox.t6/sysklogd/syslogd.o
   3457       0       0    3457     d81 busybox.t7/sysklogd/syslogd.o

diff: stop using data/bss

function                                             old     new   delta
do_diff                                              385     436     +51
diff_main                                            850     895     +45
dump_unified_vec                                     437     457     +20
prepare                                              335     334      -1
anychange                                              1       -      -1
suff                                                   4       -      -4
status                                               135     131      -4
static.max_context                                     4       -      -4
start                                                 12       8      -4
pref                                                   4       -      -4
member                                                 4       -      -4
label2                                                 4       -      -4
label1                                                 4       -      -4
klist                                                  4       -      -4
ixold                                                  4       -      -4
ixnew                                                  4       -      -4
dl_count                                               4       -      -4
dl                                                     4       -      -4
context_vec_start                                      4       -      -4
context_vec_ptr                                        4       -      -4
context_vec_end                                        4       -      -4
context                                                4       -      -4
clistlen                                               4       -      -4
clist                                                  4       -      -4
clen                                                   4       -      -4
class                                                  4       -      -4
J                                                      4       -      -4
add_to_dirlist                                        71      64      -7
slen                                                   8       -      -8
sfile                                                  8       -      -8
len                                                    8       -      -8
file                                                   8       -      -8
get_dir                                              196     185     -11
newcand                                               97      85     -12
change                                               351     331     -20
stb2                                                  96       -     -96
stb1                                                  96       -     -96
diffreg                                             2835    2717    -118
------------------------------------------------------------------------------
(add/remove: 0/27 grow/shrink: 3/8 up/down: 116/-482)        Total: -366 bytes

# size */*/diff.o
   text    data     bss     dec     hex filename
   7055       8     305    7368    1cc8 busybox.t2/coreutils/diff.o
   7002       0       0    7002    1b5a busybox.t3/coreutils/diff.o

ping: stop using data/bss

function                                             old     new   delta
ping_main                                            375     392     +17
unpack_tail                                          317     320      +3
ping4                                                525     528      +3
ping6                                                772     773      +1
sendping6                                             99      98      -1
sendping4                                            184     183      -1
myid                                                   2       -      -2
sendping_tail                                        154     151      -3
tsum                                                   4       -      -4
tmin                                                   4       -      -4
tmax                                                   4       -      -4
source_lsa                                             4       -      -4
pingsock                                               4       -      -4
pingcount                                              4       -      -4
ntransmitted                                           4       -      -4
nrepeats                                               4       -      -4
nreceived                                              4       -      -4
if_index                                               4       -      -4
hostname                                               8       4      -4
dotted                                                 4       -      -4
datalen                                                4       -      -4
pingaddr                                              28       -     -28
rcvd_tbl                                             128       -    -128
------------------------------------------------------------------------------
(add/remove: 0/15 grow/shrink: 4/4 up/down: 24/-215)         Total: -191 bytes
   text    data     bss     dec     hex filename
 679835    2728   16736  699299   aaba3 busybox_old
 679851    2720   16536  699107   aaae3 busybox_unstripped

Audit bb_common_bufsiz usage, add script which looks for misuse.
tr: stop using globals needlessly.
code: -103 bytes

find_stray_communal_vars: script which finds communal variables
resize: remove globals var
mdev: remove globals var

start 1.7.x version

fdisk: make it work with big disks (read: typical today's disks)
even if CONFIG_LFS is unset.

website: announce 1.6.0

less: less <HUGEFILE + [End] busy loops, fix it

less: forgot trivial #if ENABLE_xxxx

delete tons of extra #includes

use "glibc errno" trick not only for ash, but for entire busybox
(add/remove: 1/1 grow/shrink: 37/37 up/down: 139/-228)        Total: -89 bytes

more: stop using bss

# make && make bloatcheck
function                                             old     new   delta
gotsig                                                86     107     +21
more_main                                            777     781      +4
cin_fileno                                             4       -      -4
set_tty_to_initial_mode                               25       -     -25
new_settings                                         120      60     -60
initial_settings                                     120      60     -60
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 2/2 up/down: 25/-149)          Total: -124 bytes

less: fix very obscure memory corruption bug

less: stop using data/bss. Code got smaller too.
# size busybox_old busybox_unstripped
   text    data     bss     dec     hex filename
 700719    2896   17880  721495   b0257 busybox_old
 700547    2832   17432  720811   affab busybox_unstripped
# size */*/less.o
   text    data     bss     dec     hex filename
   6861      50     344    7255    1c57 busybox.t0/miscutils/less.o
   6657       0       0    6657    1a01 busybox.t1/miscutils/less.o

nmeter: stop using data/bss; reduce amount of reads from /proc
# size */*/nmeter.o
   text    data     bss     dec     hex filename
   4366      80      16    4462    116e busybox.t0/miscutils/nmeter.o
   4386       0       0    4386    1122 busybox.t2/miscutils/nmeter.o

vi: move some data to malloc'ed space: ~500 less bss, code
size is smaller too (subject to arch differenced I guess)

hush: trivial buglet found by randomconfig testing

whitespace fixes

verror_msg: don't printf(NULL)

test: close bug 1371
test: plug a memory leak

ping: fix wrong sign extension of packet id (bug 1373)

usage.c: remove reference to busybox.h
*: s/include "busybox.h"/include "libbb.h"

xpipe: introduce (saves ~170 bytes)
udhcp/signalpipe.c: use pipe instead of socketpair.

- fix typo in help text and fix punctuation

hush: fix 'echo abc`sleep 5`def' + Ctrl-Z and Ctrl-C bugs. +50 bytes of code.

hush: avoid duplicating HUSH_VERSION

hush: micro-optimization in new variable code

hush: we can't do without variable->value member, saving 25 bytes of code
and some runtime memory. Rename few variables.

hush: rework variable storage and environment handling.
More that -100 bytes of code + memory leak plugged.
Added a testcase for it.

hush: update README with yet another failure case

hush: fix segfaulting syntax error in interactive hush

hush: improve 2 testsuite tests

hush: add 2 tests for correct syntax error reporting

udhcp: socketpair can fail if AF_UNIX is not available (e.g. if module is not loaded).
Error out on that.

hush: fix handling of unmatched ${name  (without closing '}') -
was eating all remaining input, potentially megabytes.
nofork: save/restore die_jmp too
nofork: use -2222 instead of -111 as "special" return valur for zero
(-111 is used by some applets. -2222 won't fit in exitcode and thus safer)

hush: make syntax error messages a bit more useful

hush: prepare testsuite for new, fixed error message format

hush: fix job control with eval /bin/external_prog
hush: fix parsing of unterminated "str with no EOL
hush: improved make_string() (smaller, faster, needs less RAM)
hush: renamed several functions

hush: fix a bit different instance of "No EOL" bug,
add testsuite for that. Expand another testsuite.

fix execute bit on hush-misc/shift.tests

hdparm: make -T -t code smaller (-194 bytes), and output prettier

hush: add 3 CONFIG_xxx, allowing for smaller and less capable hush.
Minimal hush is ~9k now (lash is ~7k).

shells: update README and testsuite. environment memory leak
needs to be fixed - and documented!

hush: using smallints where we can. save ~20 bytes in code and
some data storage at runtime.

hush: fix shift + $0 bug; add testcase

hush: trivial size optimization

hush: make process substitution configurable; add a testcase

busybox.net: announce 1.5.1 on the web site.

ash: implement type -p, costs less than 10 bytes
(patch by Mats Erik Andersson <mats.andersson64@comhem.se>)

mount: fix mounting of symlinks (mount from util-linux allows that)

cttyhack: new applet.

make "static linking against glibc" an #error, not #warning

awk: fix a trivial bug introduced by me.
This is how it goes. I break stuff by doing useless 'cleanups',
people fix the fallout. :(. Thanks rockeychu!

we were basically ignoring CONFIG_USE_BB_PWD_GRP (assuming =y),
fix this

awk: make code a bit less obfuscated

several *.c files:
move 'extern environ' up to the location of #includes

vi: remove two globals
awk: some 'lineno' vars were shorts, made them ints (code got smaller)
awk: rename global t to global ttt. still an awful name, but at least
     you can grep for it now.

function                                             old     new   delta
ttt                                                    -      28     +28
mysleep                                              104     120     +16
readit                                               408     418     +10
lineno                                                 2       4      +2
parse_program                                        338     339      +1
evaluate                                            6446    6445      -1
syntax_error                                          25      23      -2
next_token                                           917     915      -2
new_node                                              26      24      -2
tv                                                    16       8      -8
skip_spaces                                           68      53     -15
t                                                     28       -     -28
rfds                                                 128       -    -128
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 4/6 up/down: 57/-186)          Total: -129 bytes

hush: do "struct globals" trick. hush.o data+bss = 0 bytes now.
+60 bytes to image, but -8000 bytes in bss.

hush: consolidated variable expansion for assignments and "normal" one.
-435 bytes. Tested against testsuite.

more compile fixes from randomconfig run

fix trivial compile errors found by randomconfig run

netstat: fix error in new -W option handling

hush: take care of several easy FIXMEs. -228 bytes.

hush: another microscopic typo fix

hush: fix English in comment

hush: simplify read builtin; fix set_local_var (misplaced 'goto skip;')

hush: fix expansion of quoted $VAR, $* and $@

hush: fix incorrect processing of echo "'$var'".
hush: rename map[] and MAP_xxx, making them easier to understand.
hush: move testcase (which now passes) from hush-bugs to hush-parsing

netstat: introduce -W: wide, ipv6-friendly output
netstat: shrink by ~500 bytes
(patch by Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn@axis.com>)
netstat: fix for bogus state value for raw sockets