Re: [RFC] adding zmktemp command

[Clinton Bunch <cdb_zsh@zentaur.org>]

On 3/28/2019 10:17 AM, Peter Stephenson wrote:
> On Wed, 2019-03-27 at 16:16 -0500, Clinton Bunch wrote:
>> But it also seems like it would be a good fit into the zsh/files module
>> (mktemp and zf_mktemp instead of zmktemp)
>>
>> Thoughts?
> It occurs to me that one reason for doing this might be that you could
> add a zf_mkstemp function (no reason for compatibility with any external
> command) that both creates and opens a file using mkstemp(), returning
> the file descriptor in REPLY as usual.  This is then secure.
> That's something that's hard to do without a builtin.
>
> pws

I was actually planning on adding a -f option to return a fd  as the 
zsystem flock command does.  This could then be used in print -u, 
sysseek, and read -u statements.  I would also probably use mkstemps 
(hand-rolled where not available in libc) as suffixes can be a good 
thing.  This would also relieve the predictability issue with HP-UX's 
mkstemp.

I didn't think about using REPLY by default.  That could cause issues 
with use of read -u if they rewind the file