For example, if it failed to invoke msgsnd/msgrcv:
1. How to handle the errno – what is the best way?
2. What principle is applying to business product?
3. Shall I have to cover all of them?
4. What kinds of error must be handled? Do I have to write a signal handler for EINTR or something like this?
Here's my straw-man code:
RetVal = msgrcv(... );
if( RetVal == -1 )
{
switch (errno)
{
case E2BIG:
...
case EAGAIN:
...
case EFAULT:
...
case EIDRM:
...
case EINTR:
...
case EINVAL:
...
case ENOMEM:
...
default:
...
}
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