Getting a safe path for a temporary file

[Shriramana Sharma]

On Wednesday, 25 October 2017 at 00:35:29 UTC, Ali Çehreli wrote:
> > char[] name = "/tmp/XXXXXX".dup;
>
> remain valid. The actual issue is the missing '\0'. So, 
> consider toStringz in this case:
>
>   https://dlang.org/library/std/string/to_stringz.html

Thanks for your reply, but can you clarify exactly I should use 
this?

char[] name = "/tmp/XXXXXX".toStringz;

gives

<src>(13): Error: cannot implicitly convert expression 
`toStringz("/tmp/XXXXXX")` of type `immutable(char)*` to `char[]`

So I tried:

char[] name = "/tmp/XXXXXX".toStringz.dup;

which gives

<src>(13): Error: template object.dup cannot deduce function from 
argument types !()(immutable(char)*), candidates are:
/usr/include/dmd/druntime/import/object.d(1943):        
object.dup(T : V[K], K, V)(T aa)
/usr/include/dmd/druntime/import/object.d(1979):        
object.dup(T : V[K], K, V)(T* aa)
/usr/include/dmd/druntime/import/object.d(3764):        
object.dup(T)(T[] a) if (!is(const(T) : T))
/usr/include/dmd/druntime/import/object.d(3780):        
object.dup(T)(const(T)[] a) if (is(const(T) : T))

And:

char[] name = "/tmp/XXXXXX".dup.toStringz;

gives the error <src>(13): Error: cannot implicitly convert 
expression `toStringz(dup("/tmp/XXXXXX"))` of type 
`immutable(char)*` to `char[]`

So I'm not sure what to do?!