file descriptor 5 in bb 1.5.0?

[01flipstar at web.de]

Hello,

IŽm trying to update the firmware of an arm-based NAS (NAS-2000 raidsonic).
The problem IŽm facing now is that one of the constructor programms is not working
when I change busybox from v.1.0 to 1.5.
I used strace to figure out the differences between the two versions:

busybox 1.0

.....
read(5, 0xbefffcd4, 16)                 = -1 EAGAIN (Resource temporarily unavailable)
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(204, 40), ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B19200 opost isig icanon echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3fc4d000
write(1, "construct_admin.c System adminis"..., 71) = 71
write(5, "CREATE \"User\" \"createDir\" = \"1\" "..., 117) = 117
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=5, events=POLLIN|POLLERR|POLLHUP|POLLNVAL, revents=POLLIN}], 1, 1000) = 1
fcntl64(5, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(5, "104 OBJECT ", 16)              = 11
.....

busybox-1.5.0

.....
read(3, 0xbefffce4, 16)                 = -1 EAGAIN (Resource temporarily unavailable)
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(204, 40), ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B19200 opost isig icanon echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3fc4d000
write(1, "construct_admin.c System adminis"..., 71) = 71
write(3, "CREATE \"User\" \"createDir\" = \"1\" "..., 117) = 117
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL, revents=POLLIN}], 1, 1000) = 1
fcntl64(3, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
read(3, "401 FAIL ", 16)                = 9
.....

As far as I can see busybox 1.0 is using fd5 so my question is, is there a way to force busybox-1.5 to
use fd5 as well?

The complete strace can be found at:
http://www-stud.hs-fulda.de/~flipstar/busybox/


An other strange thing is that if I configure bb passwd-length for at leased 6chars and then change the
passwd for a none root-user bb is not really making a passwd update for shorter passwds what is ok but I would expect that bb complains about the to short passwd?!?! 

flipstar at nas2000:~ $ passwd
Changing password for flipstar
Old password:
New password:                            say X
Retype password:                               X
passwd: setuid


thanks very much in advance 
philipp
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