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

init: reduce ifdef forest (specially for Rob's happiness)

- be gentle to syntax highlighting

- update Michele address

awk: in BEGIN section $0 should be "", not "0".

traceroute: allow -w NUM as small as 1

traceroute: rewrite. Do not emit raw IP packets, instead send UDP or ICMP
 packets and rely on the kernel to form IP headers, select source IP
 and interface. Doing it in traceroute wasn't working too good,
 and was bloating it.

function                                             old     new   delta
freehostinfo                                          29       -     -29
setsin                                                30       -     -30
in_cksum                                              57       -     -57
gethostinfo                                          165       -    -165
ifaddrlist                                           364       -    -364
traceroute_main                                     3713    2951    -762
------------------------------------------------------------------------------
(add/remove: 0/5 grow/shrink: 0/1 up/down: 0/-1407)         Total: -1407 bytes

traceroute: preparatory trivial cleanups

function                                             old     new   delta
traceroute_main                                     3932    3713    -219

tunctl: new applet by Vladimir

function                                             old     new   delta
tunctl_main                                            -     371    +371
packed_usage                                       25669   25799    +130
applet_names                                        1981    1988      +7
applet_main                                         1192    1196      +4
applet_nameofs                                       596     598      +2
applet_install_loc                                   149     150      +1
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 5/0 up/down: 515/0)             Total: 515 bytes

- add CONFIG_EXTRA_CFLAGS (thanks to keesj)
  This helps with remembering additional flags like e.g. cpu settings for
  people who did not configured their compiler to produce code for their cpu
  per default.

tar: stop changing net tarfile's mode, GNU tar doesn't do it

uname: use wider integer for option bits

uname: add support for -i and -o, fix printing of unknown -p
 value with -a option

function                                             old     new   delta
uname_main                                           166     185     +19
utsname_offset                                        12      16      +4
options                                              621     623      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 25/0)               Total: 25 bytes

dhcpc: suppress "warning: 'timestamp_before_wait' might be used uninitialized

libbb: shrink linked list ops (by xmaks AT email.cz)

function                                             old     new   delta
llist_pop                                             33      29      -4
llist_unlink                                          47      28     -19
llist_add_to_end                                      50      31     -19
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-42)             Total: -42 bytes

depmod: fix -b option (by timo.teras AT iki.fi)

function                                             old     new   delta
xfreopen_write                                         -      35     +35
parse_module                                         346     353      +7
depmod_main                                          553     546      -7
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 42/-7)              Total: 35 bytes

adduser: allow adding to group 0; don't _create_ /etc/shadow,
 only append data if it exists.

function                                             old     new   delta
adduser_main                                         642     667     +25

mdev: fix breakage caused by unified parser usage

- use https for bugzilla URLs

- isascii() is obsolescent in SUSv4 and furthermore looks redundant in this spot

do not whine if /sys/block does not exist ... embedded systems dont need stinkin block devices

sysctl: fix another corner case with "dots and slashes"

printf: make integer format strings print long long-sized values.

function                                             old     new   delta
printf_main                                          668     834    +166
bb_strtoll                                             -      84     +84
print_direc                                          391     431     +40
conv_strtoull                                          -      19     +19
conv_strtoll                                           -      19     +19
conv_strtoul                                          16       -     -16
conv_strtol                                           16       -     -16
------------------------------------------------------------------------------
(add/remove: 4/2 grow/shrink: 2/0 up/down: 342/-32)           Total: 296 bytes

udhcpd: disable opton to have absolute lease times in lease file
 (that does not work with dumpleases)
dumpleases: fix -a option.
networking/udhcp/*: code shrink, more compact static leases struture,
 better comments, etc

function                                             old     new   delta
find_free_or_expired_address                           -     147    +147
nobody_responds_to_arp                                 -      84     +84
read_opt                                             781     830     +49
dumpleases_main                                      435     447     +12
send_ACK                                             229     232      +3
read_staticlease                                      90      93      +3
addStaticLease                                        60      61      +1
getIpByMac                                            46      43      -3
reservedIp                                            31      20     -11
keywords                                             304     288     -16
send_offer                                           428     403     -25
write_leases                                         225     193     -32
read_leases                                          184     143     -41
read_yn                                               64       -     -64
find_address                                         191       -    -191
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 5/6 up/down: 299/-383)          Total: -84 bytes

website: announce 1.13.2 amd 1.12.4

dc: fix the "base 2" patch omission of base not being set

libbb: add bb_unsetenv (taken from hush).
udhcpc: stop filtering environment passed to the script.
crond: fix uncovered potential bug (failing unsetenv)
mdev: fix uncovered potential bug (failing unsetenv)
tcp, udpsvd: fix uncovered potential bug (failing unsetenv)

function                                             old     new   delta
safe_setenv                                            -      58     +58
bb_unsetenv                                            -      55     +55
builtin_unset                                        139     138      -1
tcpudpsvd_main                                      1843    1830     -13
free_strings_and_unsetenv                             87      53     -34
udhcp_run_script                                    1186    1133     -53
safe_setenv4                                          62       -     -62
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/4 up/down: 113/-163)          Total: -50 bytes

sysctl: fix gcc warning (false positive)

unexpand: fix incorrect expansion, add test for it

function                                             old     new   delta
expand_main                                          676     656     -20

s/an user/a user/

*: tweak error messages
sysctl: shrink; support recursing if name is a directory:
 "sysctl net.ipv4.conf". Patch by xmaks AT email.cz

   text    data     bss     dec     hex filename
 793659     504    7492  801655   c3b77 busybox_old
 793576     504    7492  801572   c3b24 busybox_unstripped

libbb: introduce and use xmalloc_ttyname (-32 in bss).
ash: small code shrink

   text    data     bss     dec     hex filename
 793669     504    7524  801697   c3ba1 busybox_old
 793659     504    7492  801655   c3b77 busybox_unstripped

- we already have an impl for man

Add fancy svn browser thingy (via Lance Albertson of OSL)

Update links to new site locations (via Lance Albertson at OSL)

ash: fix CONFIG_ASH_OPTIMIZE_FOR_SIZE off + high-bit chars case
(do we even need CONFIG_ASH_OPTIMIZE_FOR_SIZE conditional?)

expand: fix incorrect expansion exactly on tab boundary; shrink the code

function                                             old     new   delta
expand_main                                          698     676     -22
xputchar                                              53       -     -53

watchdog: build fixes, no code changes

header_verbose_list: show off_t size, not cast to (unsigned)
get_header_tar: support GNU tar's "base256" encoding

function                                             old     new   delta
get_header_tar                                      1536    1600     +64
header_verbose_list                                  242     257     +15

libiproute: fix buggy open check: s/if (fd)/if (fd >= 0)/
less: small optimization -15 bytes

ash: printf builtin with no arguments should not exit

mount: make it more readable

placate Rob's qualms about mount.c

add a note that SO_BINDTODEVICE needs padded iface name on 2.6.26

bb_info_msg: make it do atomic, unbuffered writes
udhcpc: fix a problem where we don't open listening socket fast enough

function                                             old     new   delta
bb_info_msg                                           70     126     +56
change_listen_mode                                    37      78     +41
udhcp_listen_socket                                  151     124     -27
udhcpc_main                                         2344    2285     -59

*: fix SO_BINDTODEVICE. Kernel wants at least IFNAMSIZ bytes there.

syslogd: comment out file locking;
 make signal handling syncronous (old was racy)

function                                             old     new   delta
syslogd_main                                         963    1090    +127
quit_signal                                           96       -     -96
log_locally                                          743     595    -148
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/1 up/down: 127/-244)         Total: -117 bytes

init: do not eat last char in messages;
 do not print duplicate "init:" prefix to syslog

optimize 16- and 32-bit moves

function                                             old     new   delta
udhcpd_main                                         1239    1257     +18
udhcp_add_simple_option                               93      92      -1
buffer_read_le_u32                                    19      18      -1
unpack_gz_stream_with_info                           526     520      -6
dnsd_main                                           1470    1463      -7
udhcp_run_script                                    1208    1186     -22
send_ACK                                             255     229     -26
arping_main                                         1661    1623     -38
send_offer                                           470     428     -42
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/8 up/down: 18/-143)          Total: -125 bytes

libbb: move crypt_make_salt() to pw_encrypt.c, reuse
bin-to-ascii64 conversion which does not require an array.

function                                             old     new   delta
to64                                                  29      33      +4
to64_msb_first                                        63      62      -1
ascii64                                               65       -     -65

Fix forgotten license comments

mount: cosmetics, no code changes (verified with objdump -drsx)

libbb: add xgetgrnam too. ~0 code size change