Subject: Re: process hangs in short wait
To: None <firstname.lastname@example.org>
From: Ronald Khoo <email@example.com>
Date: 02/06/1998 00:47:30
> 370 brw1 CALL open(0x1881bf8,0,0xffffffff)
> 370 brw1 NAMI "/emul/ibcs2/dev/"
> 370 brw1 NAMI "/dev/"
> 370 brw1 RET open 5
> 370 brw1 CALL read(0x5,0xefbfda00,0x10)
Argh -- this won't work. This app was compiled on an older xenix
box that didn't use the getdents() system call to read directories
(or perhaps the developer accidentally said -lndir to deliberately
load the old opendir/readdir calls in order to be compatible
with pre-2.3 xenix kernels which did not support getdents -- something
which I used to do too)
the code is depending upon the old 14 character limited 64k inode
limited v7 directory format where you can read a directory 16 bytes
at a time and get a single directory entry each time.
Or do "ls" with "od -c ." :-)
You may have to get your app vendor to recompile his code to use
getdents (involves changing the source code though -- you need
to use different headers to align with the different libc calls :-(),
or you might get away with making a plain regular empty file
of the name /emul/ibcs2/dev. Worst come to the worst, you might
have to craft a xenix format /dev and mess about to get the data
into the directory blocks, then never run fsck on the disc again
(No, I'm not really suggesting this one :-)
Perhaps the "right" thing to do would be for the emulation code
to trap open/read access to directories and DTRT with them?