popmaildir: fix several grave bugs with using memory past end of malloc block

the -elf2flt flag can be used w/out -Wl, so drop the requirement so people can use either form

sha256/512: code shrink. Run-tested.

function                                             old     new   delta
sha512_process_block128                                -    1444   +1444
sha1_process_block64                                   -     542    +542
sha256_process_block64                                 -     529    +529
K512_lo                                                -     320    +320
K256                                                   -     320    +320
init512_lo                                             -      32     +32
init256                                                -      32     +32
sha1_hash                                             99     128     +29
sha256_end                                           160     135     -25
sha1_end                                             189     160     -29
sha512_end                                           237     204     -33
sha256_begin                                          77      44     -33
sha512_begin                                         154      88     -66
sha256_hash                                          338     259     -79
sha512_hash                                          358     262     -96
sha1_compile                                         542       -    -542
sha256_process_block                                 594       -    -594
static.K                                             896       -    -896
sha512_process_block                                1861       -   -1861
------------------------------------------------------------------------------
(add/remove: 7/4 grow/shrink: 1/7 up/down: 3248/-4254)      Total: -1006 bytes
   text    data     bss     dec     hex filename
 808013     468    7856  816337   c74d1 busybox_old
 807007     468    7856  815331   c70e3 busybox_unstripped

*: remove LOG_NOWAIT

ftpd: stop unconditional logging to syslog. This was the only applet
 which was doing it. Added option -S to enable it when desired.

function                                             old     new   delta
packed_usage                                       25647   25666     +19
ftpd_main                                           1826    1825      -1

docs/logging_and_backgrounding.txt: new mini-doc
dnsd: remove statics, remove nerly-useless SIGINT handler
crond: correct more of logfile to 0666 (as usual, umask allows
 user to remove unwanted bits).
nameif: print errors to stderr too, not just to syslog

function                                             old     new   delta
udhcp_read_interface                                 308     306      -2
ttl                                                    4       -      -4
fileconf                                               4       -      -4
dnsentry                                               4       -      -4
interrupt                                             19       -     -19
dnsd_main                                           1463    1394     -69
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 0/2 up/down: 0/-102)           Total: -102 bytes
   text    data     bss     dec     hex filename
 808161     476    7864  816501   c7575 busybox_old
 807994     468    7856  816318   c74be busybox_unstripped

mail.c: more robust handling of SIGCHLD
init: more robust signal handling

ftpd + ls - timestamp = confused Mozilla. Prevent that.

ftpd: add LOG_NDELAY to openlog

uniq: strncmp(a,b, -1) might be problematic, use INT_MAX instead

fix typo in help text

ftpd: reuse ls applet for LIST/NLST/STAT generation

function                                             old     new   delta
popen_ls                                               -     211    +211
ftpd_main                                           1760    1826     +66
handle_dir_common                                    199     228     +29
get_remote_transfer_fd                                89     104     +15
replace_char                                          30      34      +4
handle_upload_common                                 263     265      +2
bind_for_passive_mode                                129     121      -8
cmdio_write                                           84      62     -22
escape_text                                          166     136     -30
init_data_sock_params                                 81       -     -81
ftpdataio_dispose_transfer_fd                         87       -     -87
write_dirstats                                       149       -    -149
write_filestats                                      603       -    -603
------------------------------------------------------------------------------
(add/remove: 1/4 grow/shrink: 11/5 up/down: 384/-986)        Total: -602 bytes
   text    data     bss     dec     hex filename
 808804     476    7864  817144   c77f8 busybox_old
 808156     476    7864  816496   c7570 busybox_unstripped

ftpd: EPSV and SIZE support. Tested to work on IPv6 too.
libbb: str2sockaddr shuld accept [IPv6] addr without port -
 wget 'ftp://[::1]/file' needs that to work.

function                                             old     new   delta
bind_for_passive_mode                                  -     129    +129
get_nport                                              -      30     +30
ftpd_main                                           1731    1760     +29
str2sockaddr                                         412     431     +19
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/0 up/down: 207/0)             Total: 207 bytes
   text    data     bss     dec     hex filename
 808568     476    7864  816908   c770c busybox_old
 808804     476    7864  817144   c77f8 busybox_unstripped

ftp: reduce amount of realloc's done in cmdio_write

   text    data     bss     dec     hex filename
 808562     476    7864  816902   c7706 busybox_old
 808568     476    7864  816908   c770c busybox_unstripped

ftpd: code shrink

ftpd: code shrink

ftp: code shrink

   text    data     bss     dec     hex filename
 809078     476    7864  817418   c790a busybox_old
 808590     476    7864  816930   c7722 busybox_unstripped

ftpd: code shuffled a bit, added comments

ftpd: add comment

ftpd: further code shrink

function                                             old     new   delta
port_pasv_cleanup                                      -      50     +50
replace_char                                           -      30     +30
ftp_write_str_common                                 102     104      +2
handle_dir_common                                    209     204      -5
ftpd_main                                           1990    1970     -20
port_cleanup                                          23       -     -23
pasv_cleanup                                          28       -     -28
handle_upload_common                                 320     273     -47
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/3 up/down: 82/-123)           Total: -41 bytes

*: move get_sock_lsa and xwrite_str to libbb, use where appropriate

function                                             old     new   delta
get_sock_lsa                                           -      72     +72
buffer_fill_and_print                                179     196     +17
parse_expr                                           824     832      +8
read_base64                                          343     348      +5
nameval                                              202     206      +4
fbset_main                                          1694    1698      +4
expand                                              1849    1853      +4
udhcp_send_kernel_packet                             249     252      +3
udhcp_get_option                                     223     222      -1
chat_main                                           1246    1245      -1
pack_gzip                                           1661    1659      -2
doset                                                299     297      -2
bb__parsespent                                       119     117      -2
test_main                                            260     257      -3
qgravechar                                           109     106      -3
tcpudpsvd_main                                      1834    1830      -4
sysctl_display_all                                   589     580      -9
xopen_xwrite_close                                    44      33     -11
prs                                                   30      18     -12
find_main                                            418     406     -12
full_write2_str                                       25      12     -13
adduser_main                                         667     654     -13
evaltreenr                                           817     802     -15
evaltree                                             817     802     -15
tftpd_main                                           526     493     -33
ftpd_main                                           2050    1990     -60
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 7/18 up/down: 117/-211)         Total: -94 bytes

ftpd: code chrink, fixed some minor bugs
ls: update comment
*: openlog fixes (added LOG_PID, set LOG_DAEMON as appropriate)

function                                             old     new   delta
xwrite_str                                             -      26     +26
cmdio_write_ok                                         -      15     +15
handle_cwd                                            40      45      +5
packed_usage                                       25668   25670      +2
cmdio_write_raw                                        7       9      +2
handle_upload_common                                 322     320      -2
udhcpd_main                                         1375    1372      -3
udhcpc_main                                         2362    2359      -3
port_cleanup                                          27      23      -4
handle_dir_common                                    221     209     -12
str_netfd_write                                       26       -     -26
cmdio_get_cmd_and_arg                                122       -    -122
ftpd_main                                           2208    2050    -158
------------------------------------------------------------------------------
   text    data     bss     dec     hex filename
 809933     476    7864  818273   c7c61 busybox_old
 809199     476    7864  817539   c7983 busybox_unstripped

adding forgotten new file

ftpd: new applet by Adam Tkac

$ size ftpd.o
   text    data     bss     dec     hex filename
   5703       0       0    5703    1647 ftpd.o

website: mention fixes to syslogd

website: announce 1.13.3

halt/reboot/poweroff: improve error reporting

function                                             old     new   delta
halt_main                                            207     185     -22

further work on modprobe

function                                             old     new   delta
gather_options_str                                     -      75     +75
config_file_action                                   388     413     +25
load_modules_dep                                     175     192     +17
add_probe                                             67      72      +5
modprobe_main                                        494     488      -6
gather_options                                        89       -     -89
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 3/1 up/down: 122/-95)            Total: 27 bytes

- test commit

modprobe: rework/speedup by Timo Teras (timo.teras AT iki.fi)

function                                             old     new   delta
load_modules_dep                                       -     175    +175
helper_get_module                                      -     106    +106
gather_options                                         -      89     +89
add_probe                                              -      67     +67
config_file_action                                   345     388     +43
get_or_add_modentry                                    -      10     +10
loaded                                                 4       -      -4
read_config                                          239     234      -5
llist_find                                            34       -     -34
add_option                                            60       -     -60
modprobe_main                                        567     494     -73
do_modprobe                                          601     273    -328
------------------------------------------------------------------------------
(add/remove: 5/3 grow/shrink: 1/3 up/down: 490/-504)          Total: -14 bytes
   text    data     bss     dec     hex filename
 816778     476    7888  825142   c9736 busybox_old
 816768     476    7880  825124   c9724 busybox_unstripped

modutils: delete unused global variable

function                                             old     new   delta
modprobe_main                                        570     567      -3
insmod_main                                          101      98      -3
insmod_outputname                                      4       -      -4
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/2 up/down: 0/-10)             Total: -10 bytes
   text    data     bss     dec     hex filename
 816784     476    7892  825152   c9740 busybox_old
 816778     476    7888  825142   c9736 busybox_unstripped

networking/libiproute/*: code shrink by optimizing numeric conversions
 and other misc stuff

function                                             old     new   delta
print_tunnel                                         660     656      -4
format_host                                            5       -      -5
get_unsigned                                          70      54     -16
get_u32                                               70      54     -16
do_iplink                                           1173    1151     -22
get_prefix                                           417     393     -24
print_rule                                           800     771     -29
print_addrinfo                                      1374    1342     -32
print_route                                         1745    1709     -36
iprule_modify                                        905     866     -39
iproute_modify                                      1105    1048     -57
get_integer                                           70       -     -70
parse_args                                          1684    1440    -244
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/11 up/down: 0/-594)          Total: -594 bytes
   text    data     bss     dec     hex filename
 817378     476    7892  825746   c9992 busybox_old
 816784     476    7892  825152   c9740 busybox_unstripped

sendmail: document and fix usage of fd #4, fix check for helper failure.

function                                             old     new   delta
packed_usage                                       25663   25694     +31
signal_handler                                       191     215     +24
kill_helper                                           22      31      +9
launch_helper                                        194     184     -10
get_cred_or_die                                      142     129     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/2 up/down: 64/-23)             Total: 41 bytes

wget: --post-data support by Harald Kuthe (harald-tuxbox AT arcor.de)

function                                             old     new   delta
wget_main                                           2467    2793    +326
static.wget_longopts                                 110     122     +12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 338/0)             Total: 338 bytes

modprobe: emit "can't open 'modules.dep': (errno)" instead of "module not found"
*: s/can't open %s/can't open '%s'/, it's better to use same string.

function                                             old     new   delta
do_modprobe                                          588     601     +13
config_file_action                                   339     345      +6
modprobe_main                                        565     570      +5
unable_to_open                                        14      16      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 26/0)               Total: 26 bytes
   text    data     bss     dec     hex filename
 816800     476    7892  825168   c9750 busybox_old
 816812     476    7892  825180   c975c busybox_unstripped

ip: in "ip rule add from all table 1", "all" is taken as 0.0.0.0/32,
whereas "any" and "default" would be 0.0.0.0/0. They must be all 0.0.0.0/0.
Closes bug 57.

expr: a bit more robust handling of regexps with groups (closes bug 87)

printf: fix 1.12.0 breakage (from %*d fix). It was misinterpreting "*"

ls: implement -Q and -g (-g was accepted but ignored)

function                                             old     new   delta
print_name                                             -     198    +198
showfiles                                           1489    1508     +19
ls_options                                            30      31      +1
opt_flags                                            112     108      -4
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 218/-4)            Total: 214 bytes

ls: do not follow links with -s (closes bug 33),
 display unsigned data with %XXu, not %XXd.

top: make it work again on 2.4 kernels (closes bug 125)

sendmail: improve help text

wget: fix --header handling

syslogd: create logfile with 0666, not 0600.

tr: update testsuite

tr: fix overflow in expand and complement, fix stop after [:class:],
 fix order of [:xdigit:], make tr require one param at least.

function                                             old     new   delta
expand                                              1743    1849    +106
tr_main                                              463     518     +55
complement                                            72      75      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 164/0)             Total: 164 bytes

tr: support [:xdigit:], fix handling of ranges and [x]'s.
 add testsuite entry for each of 3 bugs fixed.

function                                             old     new   delta
static.classes                                        73      82      +9
expand                                              1738    1743      +5
complement                                            74      72      -2
tr_main                                              472     463      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 14/-11)              Total: 3 bytes

runsv: another tiny optimization

function                                             old     new   delta
startservice                                         297     288      -9
ctrl                                                 435     426      -9

runsv: small optimization
*: more paranoia around passing NULL to execl[e]

function                                             old     new   delta
custom                                               240     221     -19

modutils: oveflow fix

unzip: fix thinko with le/be conv and size (closes bug 129)
awk: make "struct global" hack more robust wrt alignment (closes bug 131)

login: fix buglet introduced by "simplification"

flash_eraseall.c: fix vda's breakage

- rephrase helptext for clarity

- improve wording

- by not calling getpagesize() twice we can save 2 bytes (walter harms)

- fix typo (thanks to Peter Kjellerstedt for noticing)

- Dual-license the config parser also under "LGLPv2.1 or later"
  (Vladimir Dronnikov)

make modutils compile again

depmod: accept and ignore -r (Linux kernle build needs this)

flash_eraseall: shrink

function                                             old     new   delta
flash_eraseall_main                                 1044    1006     -38

- add big busybox logo as transparent png

- bail out if screen resolution does not match PPM dimensions.
  Previously a 640x480 PPM on an e.g. 720x400 console would just segfault when
  reading the lines. While this bug should perhaps be fixed to handle such cases
  properly we just exit gracefully until somebody is willing to take care of it
  properly.

- document ppm header and skip whitespace

- update TODOs

- eliminate globals

- make it compile and shrink it a little bit (~-110 bytes)
   text    data     bss     dec     hex filename
   1533       4       0    1537     601 miscutils/flash_eraseall.o.old
   1415       4       0    1419     58b miscutils/flash_eraseall.o
- add some FIXMEs

- add flash_eraseall
This is the result after converting mtd-utils' flash_eraseall to BB.
The functionality given by this patch almost the same except that this
one does not support long options.
I needed this tool a system which does not have a lot of flash for RFS
and merging this into BB as the only way out.

[bigeasy@]$ ./scripts/bloat-o-meter bb_wo_fl bb_w_fl
function                                             old     new   delta
flash_eraseall_main                                    -    1072   +1072
show_progress                                          -      62     +62
packed_usage                                       25156   25176     +20
applet_names                                        1958    1973     +15
applet_main                                         2352    2360      +8
target_endian                                          -       4      +4
applet_nameofs                                       588     590      +2
applet_install_loc                                   147     148      +1
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 5/0 up/down: 1184/0)           Total: 1184 bytes
[bigeasy@]$ size miscutils/flash_eraseall.o
   text    data     bss     dec     hex filename
   1586       4       0    1590     636 miscutils/flash_eraseall.o

Signed-off-by: Benedigt Spranger <b.spranger@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

- PPMs can have comments in the header.
  Thanks to Denys for pointing that out. (~+7b)

ash: make dot command search current directory first, as bash does.

Make "shadowed" numeric config entries (ones which depend on
other options which are off) to have the value of 0, not "".

volume_id: abort early on read failures.
 should help with probing missing fdd's

init: fix compile breakage with '# CONFIG_FEATURE_KILL_REMOVED is not set'
runsvdir.c: fix typo in comment

- improve wording

- improve helptext

- misc untested shrinkage:
$ ./scripts/bloat-o-meter _bb_un.oorig busybox_unstripped
function                                             old     new   delta
fbsplash_main                                        595     985    +390
fb_drawimage                                         493       -    -493
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 390/-493)         Total: -103 bytes

$ size miscutils/fbsplash.o*
   text           data     bss     dec     hex filename
   2019              0       0    2019     7e3 miscutils/fbsplash.o.oorig
   1857              0       0    1857     741 miscutils/fbsplash.o.new

- improve helptext of obsolete devfs stuff..

- cosmetic typo in helptext

killall and sestatus also need ARGVN scanning

mdev: if /sys/class/block exists, don't scan /sys/block

function                                             old     new   delta
kill_main                                            706     884    +178

httpd: tiny optimization

httpd:

Kill config options by making them always on:

FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES

This makes httpd.c remotely readable - it had ~125 #ifdefs, now it has ~100.
The growth on a .config with all FEATURE_HTTPDs off is:

function                                             old     new   delta
send_file_and_exit                                     -     269    +269
parse_conf                                           683     763     +80
free_llist                                             -      32     +32
httpd_main                                           427     454     +27
sighup_handler                                         -      15     +15
handle_incoming_and_exit                            1110     905    -205
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 2/1 up/down: 423/-205)          Total: 218 bytes

sendmail: remove erroneous usage lines

crond,crontab: make cron directory location configurable

telnetd: do not advertise TELNET_LFLOW, we do not support
it properly.

udhcpd: add code which rejects lease files with suspicious or old timestamp.
*: s/time(0)/time(NULL)/g

login: small simplification by Walter Harms. -10 bytes

login: cleanup work by Walter Harms. No logic changes.

dhcpd,dumpleases: write and use 64-bit current time in lease file.
 without it, determination of remaining lease time is unreliable.
 Yes, it's costly in code size, but without it, dumpleases output
 is misleading!

function                                             old     new   delta
read_leases                                          143     282    +139
dumpleases_main                                      447     572    +125
write_leases                                         193     233     +40
hton64                                                29      58     +29
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 333/0)             Total: 333 bytes

modutils-24: code shrink

function                                             old     new   delta
helper_create_alloced_section                          -     117    +117
print_load_map                                       474     450     -24
bb_init_module_24                                   4615    4545     -70
obj_create_alloced_section                           131      30    -101
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/3 up/down: 117/-195)          Total: -78 bytes

ionice: new applet, adapted from Linux kernel' example by Walter Harms

   text    data     bss     dec     hex filename
1050316     924   10952 1062192  103530 busybox_old
1050758     924   10952 1062634  1036ea busybox_unstripped

brctl: fix compilation on 2.4.x kernels

init: remove wait() loop on restart, it may be dangerous

init: fix a bug where on reload order of entries might be wrong

function                                             old     new   delta
run_shutdown_and_kill_processes                        -      97     +97
pause_and_low_level_reboot                             -      48     +48
run_actions                                           81     107     +26
restart_handler                                       56      81     +25
new_init_action                                      137     150     +13
run                                                  576     579      +3
open_stdio_to_tty                                    110      98     -12
check_delayed_sigs                                   195     170     -25
waitfor                                              354     318     -36
low_level_reboot                                      53       -     -53
kill_all_processes                                   115       -    -115
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 4/3 up/down: 212/-241)          Total: -29 bytes

modutils-24: use xasprintf and xzalloc where appropriate,
 remove unreachanble code
build system: correct some dependencies in config system
init: convert one #if into if() - for Rob.

function                                             old     new   delta
obj_string_patch                                     136     129      -7
bb_init_module_24                                   4759    4615    -144
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-151)           Total: -151 bytes

init: small correction in a comment

init: major improvement in documentation and signal handling.
 Lots of nasty, but hard to trip, races are fixed.

   text    data     bss     dec     hex filename
1038828     924   10932 1050684  10083c busybox_old
1038787     924   10932 1050643  100813 busybox_unstripped

init: preparatory patch, no code changes

init: reinstate proper handling of !ENABLE_FEATURE_USE_INITTAB