> Do you mean the NetBSD tsort(1)? The only open() with write access I 
> could find there is the dbopen(NULL, ...). But the code in 
> src/lib/libc/db/hash does not seem to create a file at all.

I did.  I started a bulk build on NetBSD/sparc64 3.0.  The output in the
log file showed:

  tsort -q /usr/obj/bulk-log/.dependstree > /usr/obj/bulk-log/.order
  tsort: db: devel/subversion-base: Permission denied

If I run the command manually from an unwriteable (to me) directory, I see:

  tsort -q /usr/obj/bulk-log/.dependstree
  tsort: db: devel/subversion-base: Permission denied

and ktruss shows:

   15913 tsort    open("_hash15913a", 0xa02, 0x180)  Err#13 EACCES

I didn't follow the code path through, but hash/hash_page.c:open_temp() sets
up a temporary file with the template "_hashXXXXXX".  I also noted that
btree/bt_open.c:__bt_open() checks "TMPDIR" via btree/bt_open.c:tmp(), but
__hash_open() and __rec_open() do not.

So, changing to a writeable directory (the bulk log file directory where
the 2 files were) seemed sensible to me.  Now I see:

  cd /usr/obj/bulk-log && tsort -q /usr/obj/bulk-log/.dependstree > /usr/obj/bulk-log/.order

and things are fine.

It might also be sensible to have __hash_open() and __rec_open() also check
"TMPDIR" and share the tmp() function.

J

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