>>Just out of curiosity, can someone explain to me why I had to do this:
>>  char *foo="rfbXXXXXX";
>
>String literals are not modifiable.

that is to say...the char array "rfbXXXXXX" gets put in a read-only
segment of your program's image.  mktemp attempts to modify it.

   char foo[]="ffbXXXXXX";

would do what you want.  that makes an array in a read/write segment.

>>And from another list... What is the difference between int **val and
>>int (*val)[] ?
>
>Get the comp.lang.c FAQ and start working your way up.  You might want
>to look for a program called 'cdecl'.

the first is declaration of an array of pointers to integers, so the
compiler needs to know the size of the array at compile-time, and

   &val == &val[0]

is true.  the second is a declaration of a pointer to a pointer to an
integer, so all the compiler allocates at compile-time is space for a
pointer, and

   &val != &val[0]

since the right hand side dereferences the pointer.

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