> What is wrong with msg_receive? Suggest a fix.
 >    #define MAXVALS 65536

 >    typedef struct _msg_t {
 >      unsigned int num;
 >      unsigned int values[MAXVALS];
 >    } msg_t;


 >    int msg_receive(int fd, msg_t *m)
 >    {
 >      size_t sz = sizeof(unsigned int);
 >      assert(m);
 >      if( read(fd, (void *)&m->num, sz) < sz)
 >         return -1;
 >      return read(fd, (void *)&m->values, sz * m->num);
 >    }

    Answer: It has a typo on _msg_t. That's why it won't work.

    Given that m is a pointer to a structure of type _msg_t or msg_t (the
code is not clear whether the underline is there or not), m->num or
m->values is required, rather than &m->etc.

    Fix: decide whether the initial underline is needed. 2) Use the pointer
rather than the address of the pointer.

Best Wishes,
Bill.

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