libbb: fix compile failure if both ARG_MAX and _SC_ARG_MAX are defined

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
ftpd: support deprecated XPWD command

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
nanddump: correct rounding to next page (lead to infinite loop)

The rounding to next page formula was wrong:
ex: (len | ~(meminfo->writesize - 1)) + 1;
len=128K
writesize=4K
(len | ~(meminfo->writesize - 1)) + 1 => 4 294 963 201 ?!

correct rounding formula:
((len - 1) | (meminfo->writesize - 1)) + 1 => 128K
len = 130K
((len - 1) | (meminfo->writesize - 1)) + 1 => 132K

modprobe nandsim parts="20,20" badblocks="22,23"

without patch:
nanddump  /dev/mtd1 | wc -c
[...] infinite loop

with the patch:
nanddump /dev/mtd1 | wc -c
327680

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
nanddump: add options --bb=skipbad and padbad

In mtd-utils, the bad block options changed in favor of
--bb=[skipbad|padbad|dumpbad] and omitbad has been removed.

This patch add the --bb=skipbad and padbad methods to busybox' nanddump.
padbad is the current default behaviour.
The difference between skipbad and omitbad is this one:
On a 16K block NAND, if the 1st block of mtd0 is bad, we'll have:
nanddump  -b -l 16384 /dev/mtd0 | wc -c
0
nanddump  --bb=skipbad -l 16384 /dev/mtd0 | wc -c
16384 <- data from 1st good block

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
nanddump: kill -b Omit bad block

since mtd-utils 1.4.7, the omit bad block method has been removed.
(cf commit d8b8f780ec3c916f3990e9227d6bfbb22bf42ef8)

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
nanddump: change default to --bb=skipbad

since mtd-utils 1.4.7, the default behaviour of nanddump is skipbad
(commit 2521d4f1b6b9866a9c89f3c11a4f6a3d763ff1d7)

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>