replace use of mkstemp in makeinfo.m with tmpnam/fopen ?

[John W. Eaton]

On 30-Jan-2009, Benjamin Lindner wrote:

| with the current develeopment sources, makeinfo.m utilizes the function 
| mkstemp to create its temporary texinfo file.
| However, mkstemp is not available on mingw32, so its call returns a file 
| descriptor of -1 and subsequently, makeinfo.m fails. This means that 
| help() and pring_usage() also fail.
| 
| Is is acceptable to replace the call to mkstemp() with a call to 
| tmpnam() and fopen() instead?
| This way, makeinfo.m does not use functions that may not be available on 
| some OSes.
| 
| I have attached a proposal changeset.
| This yields working makeinfo.m and thus also help() and print_usage() 
| for a mingw32 platform

Would it maybe be better to use a similar method in mkstemp itself so
that it can work on systems that don't have the mkstemp library
function?  I think we would need a disclaimer in the documentation
saying that on systems that don't have the mkstemp library function,
Octave's mkstemp does not have the same security properties that
mkstemp does.

jwe