Re: [PATCHES] psql 'none' as a HISTFILE special case

On 8/25/06, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > When I set HISTFILE to /dev/null I get the following:
> > could not save history to file "/dev/null": Operation not permitted
>
> Hm.  ktrace shows this happening:
>
>  23279 psql     CALL  open(0x302d70,0x601,0x1b6)
>  23279 psql     NAMI  "/dev/null"
>  23279 psql     RET   open 3
>  23279 psql     CALL  fchmod(0x3,0x180)
>  23279 psql     RET   fchmod -1 errno 1 Operation not permitted
>  23279 psql     CALL  close(0x3)
>  23279 psql     RET   close 0
>  23279 psql     CALL  write(0x2,0xbffff180,0x44)
>  23279 psql     GIO   fd 2 wrote 68 bytes
>        "could not save history to file "/dev/null": Operation not permitted
>        "
>  23279 psql     RET   write 68/0x44
>  23279 psql     CALL  exit(0)
>
> There's probably no way to get Apple's libedit to not try the fchmod,
> so what do we want to do here?  Maybe special-case the string
> "/dev/null"?

If this is OK, I can up with a patch that special cases /dev/null as a
HISTFILE if libedit is found.

- Martin -