Alex Vinokur wrote:
> char* ptr = (char*)mmap(0, sz, PROT_READ, 0, fd, 0);
>
> errno = 0;
> if (ptr != MAP_FAILED)
> {
> string str(ptr, ptr+sz);
> munmap(ptr, sz);
> }
> else
> {
> assert (ptr == MAP_FAILED);
> printf ("=== Error : %u %s ===\n", errno, strerror (errno));
> }
> The program prints:
> === Error : 0 No error ===
Of course it does, since you set errno = 0, what else could you possibly
expect? Remove that line if you want to know why mmap() fails.
Brian
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