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

On 8/25/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)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 -