the sysctl table
TRUE if this is a write to the sysctl file
the file structure
the user buffer
the size of the user buffer
Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long values from/to the user buffer, treated as an ASCII string.
This routine will ensure the values are within the range specified by table->extra1 (min) and table->extra2 (max).
Returns 0 on success.