[BusyBox] BusyBox] Busybox' "sh" shell on PowerPC

[Michael Shmulevich]

Larry,

In my original post I have mentioned two problems: one that has been 
recently succesfully resolved, while the other is still not willing to 
surrender to my sole efforts.

As I wrote, there seems to be tty race condition, especially when I use 
pipeline.  The example I gave:
# cat | grep aaa

being unable to 'grep' anything seems to be more strange that before. I 
checked the 'ps' for the command and this is what I got:

    68 root     root     T cat
    69 root     root     R grep aaa

'cat' seems to be *stopped* by some signal, which one -- I don't know, 
probably SIGSTOP. Whoever sends this probably has the reason to do so.
Running 'cat' without pipeline doesn't seem to fail.  This I see from /proc:

~ # ls -l /proc/68/fd/*
lrwx------   1 root     root           32 Jan  1 01:02 /proc/68/fd/0 -> 
/dev/ttyS0
l-wx------   1 root     root           32 Jan  1 01:02 /proc/68/fd/1 -> 
pipe:[79]
l-wx------   1 root     root           32 Jan  1 01:02 /proc/68/fd/2 -> 
pipe:[79]
~ # ls -l /proc/69/fd/*
lr-x------   1 root     root           32 Jan  1 01:02 /proc/69/fd/0 -> 
pipe:[79]
lrwx------   1 root     root           32 Jan  1 01:02 /proc/69/fd/1 -> 
/dev/ttyS0
lrwx------   1 root     root           32 Jan  1 01:02 /proc/69/fd/2 -> 
/dev/ttyS0

Pipeline is correct, except for WHY fd[2] is sent to  pipeline???

Still, there are cases when calling /bin/bash from 'sh' casues troubles.
As I said, probably there is problem with tty handling.


> Matthias wrote:
> 
> 
>> I updated to the current cvs version (0.51pre). All my problems are gone
>> ! Fine work ! The sh is now working fine for me !
> 
> 
> Good news.  I think Erik can release 0.51 now with a clear conscience.
> 
> 
>> Thanks Larry for your help.
> 
> 
> I may have provided some emotional support, but it was Erik
> who actually fired up Electric Fence and pinpointed the bug.
> 
> http://busybox.net/lists/busybox/2001-April/002741.html
> 
>     - Larry
> 
> 

-- 
Sincerely yours,
Michael Shmulevich
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